#!/usr/bin/perl

# Copyright (C) 2010-2021 Trizen <echo dHJpemVuQHByb3Rvbm1haWwuY29tCg== | base64 -d>.
# Copyright (C) 2020-2021 Jesus E. <echo aGVja3llbEBoeXBlcmJvbGEuaW5mbw== | base64 -d>.
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of either: the GNU General Public License as published
# by the Free Software Foundation; or the Artistic License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
#
# See https://dev.perl.org/licenses/ for more information.
#
#-------------------------------------------------------
#  GTK Fair Viewer
#  Fork: 30 October 2020
#  Edit: 19 June 2021
#  https://git.sr.ht/~heckyel/fair-viewer
#-------------------------------------------------------

# This is a fork of youtube-viewer:
#   https://github.com/trizen/youtube-viewer

use utf8;
use 5.016;

use warnings;
no warnings 'once';

my $DEVEL;                                           # true in devel mode
use if ($DEVEL = -w __FILE__), lib => qw(../lib);    # devel only

use WWW::FairViewer v1.1.0;
use WWW::FairViewer::RegularExpressions;

use Gtk3 qw(-init);
use File::Spec::Functions qw(
  rel2abs
  catdir
  catfile
  curdir
  updir
  path
  tmpdir
  file_name_is_absolute
);

require Storable;
binmode(STDOUT, ':utf8');

my $appname = 'GTK+ Fair Viewer';
my $version = $WWW::FairViewer::VERSION;

# Saved and subscribed channels
my %channels;
my %subscribed_channels;
my %removed_channels;
my %unsubbed_channels;

# Share directory
my $share_dir =
  ($DEVEL and -d "../share")
  ? '../share'
  : do { require File::ShareDir; File::ShareDir::dist_dir('WWW-FairViewer') };

# Configuration dir/file
my $home_dir;
my $xdg_config_home = $ENV{XDG_CONFIG_HOME};

if ($xdg_config_home and -d -w $xdg_config_home) {
    require File::Basename;
    $home_dir = File::Basename::dirname($xdg_config_home);

    if (not -d -w $home_dir) {
        $home_dir = $ENV{HOME} || curdir();
    }
}
else {
    $home_dir =
         $ENV{HOME}
      || $ENV{LOGDIR}
      || ($^O eq 'MSWin32' ? '\Local Settings\Application Data' : ((getpwuid($<))[7] || `echo -n ~`));

    if (not -d -w $home_dir) {
        $home_dir = curdir();
    }

    $xdg_config_home = catdir($home_dir, '.config');
}

# Configuration dirs
my $config_dir          = catdir($xdg_config_home, 'fair-viewer');
my $local_playlists_dir = catdir($config_dir,      'playlists');

# Config files
my $config_file              = catfile($config_dir, "gtk-fair-viewer.conf");
my $youtube_users_file       = catfile($config_dir, 'users.txt');
my $subscribed_channels_file = catfile($config_dir, 'subscribed_channels.txt');
my $history_file             = catfile($config_dir, 'gtk-history.txt');
my $session_file             = catfile($config_dir, 'session.dat');
my $watched_file             = catfile($config_dir, 'watched.txt');

# Special local playlists
my $watch_history_data_file       = catfile($local_playlists_dir, 'watched_videos.dat');
my $liked_videos_data_file        = catfile($local_playlists_dir, 'liked_videos.dat');
my $disliked_videos_data_file     = catfile($local_playlists_dir, 'disliked_videos.dat');
my $favorite_videos_data_file     = catfile($local_playlists_dir, 'favorite_videos.dat');
my $subscription_videos_data_file = catfile($local_playlists_dir, "subscriptions.dat");

# Create the configuration directory
foreach my $dir ($config_dir, $local_playlists_dir) {
    if (not -d $dir) {
        require File::Path;
        File::Path::make_path($dir)
          or warn "[!] Can't create dir <<$dir>>: $!";
    }
}

# Create the special playlist files
foreach my $file ($watch_history_data_file, $liked_videos_data_file, $disliked_videos_data_file, $favorite_videos_data_file,) {
    if (not -s $file) {
        Storable::store([], $file);
    }
}

# Video queue for the enqueue feature
my @VIDEO_QUEUE;

# Keep track of watched videos
my %WATCHED_VIDEOS;

sub which_command {
    my ($cmd) = @_;

    if (file_name_is_absolute($cmd)) {
        return $cmd;
    }

    state $paths = [path()];
    foreach my $path (@{$paths}) {
        if (-e (my $cmd_path = catfile($path, $cmd))) {
            return $cmd_path;
        }
    }
    return;
}

my %symbols = (
               thumbs_up   => '👍',
               thumbs_down => '👎',
               type        => '☯',
               author      => '😃',
               author_id   => '웃',
               average     => '📊',
               category    => '🗃️',
               play        => '▶️',
               views       => '👁',
               heart       => '❤️',
               published   => '⏱️',
               updated     => '→',
               numero      => '#️⃣',
               video       => '🎞️',
               subs        => '👪',
              );

# Main configuration
my %CONFIG = (

    # Combobox values
    active_resolution_combobox          => 0,
    active_more_options_expander        => 0,
    active_panel_account_combobox       => 0,
    active_channel_type_combobox        => 0,
    active_subscriptions_order_combobox => 0,

    video_players => {
                      vlc => {
                              cmd   => q{vlc},
                              srt   => q{--sub-file=*SUB*},
                              audio => q{--input-slave=*AUDIO*},
                              fs    => q{--fullscreen},
                              arg   => q{--quiet --play-and-exit --no-video-title-show --input-title-format=*TITLE* *VIDEO*},
                             },
                      mpv => {
                              cmd   => q{mpv},
                              srt   => q{--sub-file=*SUB*},
                              audio => q{--audio-file=*AUDIO*},
                              fs    => q{--fullscreen},
                              arg   => q{--really-quiet --force-media-title=*TITLE* --no-ytdl *VIDEO*},
                             },
                     },
    video_player_selected => undef,    # autodetect it later

    # GUI options
    clear_text_entries_on_click => 0,
    show_thumbs                 => 1,
    clear_search_list           => 1,
    default_notebook_page       => 1,
    mainw_size                  => '700x400',
    mainw_maximized             => 0,
    mainw_fullscreen            => 0,
    mainw_centered              => 0,
    hpaned_width                => 250,
    hpaned_position             => 420,

    # Pipe options
    split_videos     => 1,
    dash             => 1,        # may load slow
    prefer_mp4       => 0,
    prefer_av1       => 0,
    ignore_av1       => 0,
    prefer_m4a       => 0,
    prefer_invidious => 0,
    maxResults       => 10,
    hfr              => 1,        # true to prefer high frame rate (HFR) videos
    resolution       => 'best',
    videoDimension   => undef,
    videoLicense     => undef,
    region           => undef,

    comments_width => 80,         # wrap comments longer than `n` characters
    comments_order => 'top',      # valid values: time, relevance

    # API
    api_host => "auto",

    # URI options
    thumbnail_type       => 'medium',
    youtube_video_url    => 'https://www.youtube.com/watch?v=%s',
    youtube_playlist_url => 'https://www.youtube.com/playlist?list=%s',
    youtube_channel_url  => 'https://www.youtube.com/channel/%s',

    # Subtitle options
    srt_languages => ['en', 'es'],
    get_captions  => 1,
    auto_captions => 0,
    cache_dir     => undef,          # will be defined later

    # Others
    env_proxy   => 1,
    http_proxy  => undef,
    timeout     => undef,
    user_agent  => undef,
    cookie_file => undef,
    prefer_fork => (($^O eq 'linux') ? 0 : 1),
    debug       => 0,
    fullscreen  => 0,
    audio_only  => 0,

    autoscroll_to_end => 0,

    # hypervideo support
    ytdl     => 1,
    ytdl_cmd => undef,    # auto-detect

    tooltips        => 1,
    tooltip_max_len => 512,    # max length of description in tooltips

    thousand_separator => q{,},
    downloads_dir      => curdir(),
    web_browser        => undef,        # defaults to $ENV{WEBBROWSER} or xdg-open
    terminal           => undef,        # autodetect it later
    terminal_exec      => q{-e '%s'},
    pipe_viewer        => undef,
    pipe_viewer_args   => [],

    ignored_projections => [],

    # Watch history
    watch_history => 1,
    watched_file  => $watched_file,

    # Subscribed channels
    subscribed_channels_file => $subscribed_channels_file,
    subscriptions_limit      => 10_000,                      # maximum number of subscription videos stored
    youtube_users_file       => $youtube_users_file,

    history                => 1,
    history_limit          => 100_000,
    history_file           => $history_file,
    recent_history         => 10,
    remember_session       => 1,
    remember_session_depth => 10,
    entry_completion_limit => 10,

    # Save titles
    save_titles_to_history  => 0,
    save_watched_to_history => 0,
);

{
    my $config_documentation = <<"EOD";
#!/usr/bin/perl

# $appname $version - configuration file

EOD

    # Save hash config to file
    sub dump_configuration {
        require Data::Dump;
        open my $config_fh, '>', $config_file
          or do { warn "[!] Can't open '${config_file}' for write: $!"; return };

        my $dumped_config = q{our $CONFIG = } . Data::Dump::pp(\%CONFIG) . "\n";

        if ($home_dir eq $ENV{HOME}) {
            $dumped_config =~ s/\Q$home_dir\E/\$ENV{HOME}/g;
        }

        print $config_fh $config_documentation, $dumped_config;
        close $config_fh;
    }
}

# Creating config unless it exists
if (not -e $config_file or -z _) {
    dump_configuration();
}

local $SIG{TERM} = \&on_mainw_destroy;
local $SIG{INT}  = \&on_mainw_destroy;

# Locating the .glade interface file and icons dir
my $glade_file = catfile($share_dir, "gtk-fair-viewer.glade");
my $icons_path = catdir($share_dir, 'icons');

# Defining GUI
my $gui = 'Gtk3::Builder'->new;
$gui->add_from_file($glade_file);
$gui->connect_signals(undef);

# GValue wrapper (unused for now)
sub gval ($$) {
    Glib::Object::Introspection::GValueWrapper->new('Glib::' . ucfirst($_[0]) => $_[1]);
}

# Convert a string into an array-ref of bytes
sub gcarray ($) {
    [map { ord } split(//, $_[0])]
}

# -------------  Get GUI objects ------------- #

my %objects = (

    # Windows
    '__MAIN__'          => \my $mainw,
    'users_list_window' => \my $users_list_window,
    'help_window'       => \my $help_window,
    'prefernces_window' => \my $prefernces_window,
    'errors_window'     => \my $errors_window,
    'login_to_youtube'  => \my $login_to_youtube,
    'details_window'    => \my $details_window,
    'aboutdialog1'      => \my $about_window,
    'feeds_window'      => \my $feeds_window,
    'warnings_window'   => \my $warnings_window,

    # Others
    'treeview1'              => \my $users_treeview,
    'feeds_statusbar'        => \my $feeds_statusbar,
    'treeview2'              => \my $treeview,
    'treeview3'              => \my $cat_treeview,
    'feeds_treeview'         => \my $feeds_treeview,
    'liststore1'             => \my $liststore,
    'liststore2'             => \my $users_liststore,
    'liststore4'             => \my $cats_liststore,
    'liststore11'            => \my $feeds_liststore,
    'textview3'              => \my $config_view,
    'warnings_textview'      => \my $warnings_textview,
    'errors_textview'        => \my $errors_textview,
    'search_entry'           => \my $search_entry,
    'statusbar1'             => \my $statusbar,
    'treeviewcolumn2'        => \my $thumbs_column,
    'textview2'              => \my $textview_help,
    'from_author_entry'      => \my $from_author_entry,
    'more_options_expander'  => \my $more_options_expander,
    'notebook1'              => \my $notebook,
    'comboboxtext9'          => \my $resolution_combobox,
    'comboboxtext8'          => \my $duration_combobox,
    'comboboxtext3'          => \my $caption_combobox,
    'comboboxtext4'          => \my $definition_combobox,
    'comboboxtext5'          => \my $license_combobox,
    'comboboxtext1'          => \my $published_within_combobox,
    'comboboxtext13'         => \my $subscriptions_order_combobox,
    'panel_user_entry'       => \my $panel_user_entry,
    'comboboxtext6'          => \my $panel_account_type_combobox,
    'comboboxtext2'          => \my $order_combobox,
    'comboboxtext7'          => \my $channel_type_combobox,
    'comboboxtext10'         => \my $search_for_combobox,
    'spinbutton1'            => \my $spin_results,
    'spinbutton2'            => \my $spin_start_with_page,
    'thumbs_checkbutton'     => \my $thumbs_checkbutton,
    'fullscreen_checkbutton' => \my $fullscreen_checkbutton,
    'clear_list_checkbutton' => \my $clear_list_checkbutton,
    'dash_checkbutton'       => \my $dash_checkbutton,
    'audio_only_checkbutton' => \my $audio_only_checkbutton,
    'hbox2'                  => \my $hbox2,
    'feeds_title'            => \my $feeds_title,
    'channel_name_save'      => \my $save_channel_name_entry,
    'channel_id_save'        => \my $save_channel_id_entry,
    'main-menu-history-menu' => \my $history_menu,
);

while (my ($key, $value) = each %objects) {
    my $object = $gui->get_object($key);
    if (defined $object) {
        ${$value} = $object;
    }
    else {
        print STDERR "[WARN] undefined object: $key\n";
    }
}

# __WARN__ handle
local $SIG{__WARN__} = sub {
    my $warning = strip_spaces(join('', @_));

    say STDERR $warning;

    return if $warning =~ / at \(eval /;
    return if $warning =~ /\bunhandled exception in callback:/;
    return if $warning =~ /, or \} expected while parsing object\/hash/;

    $warning = "[" . localtime(time) . "]: " . $warning . "\n";

    set_text($warnings_textview, $warning, append => 1);
};

# __DIE__ handle
local $SIG{__DIE__} = sub {
    my $caller = [caller]->[0];
    my $error  = strip_spaces(join('', @_));

    say STDERR $error;

    # Ignore harmless errors
    return if $error =~ / at \(eval /;
    return if $error =~ /, or \} expected while parsing object\/hash/;

    # Ignore third-party errors
    if (not $caller =~ /^(?:main\z|WWW::FairViewer\b)/) {
        return;
    }

    set_text(
        $errors_textview,
        $error . do {
            if ($error =~ /^Can't locate (.+?)\.pm\b/) {
                my $module = $1;
                $module =~ s{[/\\]+}{::}g;
                return if $module eq 'LWP::UserAgent::Cached';
                "\nThe module $module is required!\n\nTo install it, just type in terminal:\n\tsudo cpan $module\n";
            }
          }
          . "\n\n=>> Previous warnings:\n" . get_text($warnings_textview)
    );

    warn "$error\n";
    $errors_window->show;
    return 1;
};

#---------------------- LOAD IMAGES ----------------------#
my $app_icon_pixbuf       = 'Gtk3::Gdk::Pixbuf'->new_from_file(catfile($icons_path, "gtk-fair-viewer.png"));
my $user_icon_pixbuf      = 'Gtk3::Gdk::Pixbuf'->new_from_file_at_size(catfile($icons_path, "user.png"),          16,  16);
my $feed_icon_pixbuf      = 'Gtk3::Gdk::Pixbuf'->new_from_file_at_size(catfile($icons_path, "feed.png"),          16,  16);
my $feed_icon_gray_pixbuf = 'Gtk3::Gdk::Pixbuf'->new_from_file_at_size(catfile($icons_path, "feed_gray.png"),     16,  16);
my $default_thumb         = 'Gtk3::Gdk::Pixbuf'->new_from_file_at_size(catfile($icons_path, "default_thumb.jpg"), 160, 90);

# Setting application title and icon
$mainw->set_title("$appname $version");
$mainw->set_icon($app_icon_pixbuf);

our $CONFIG;
require $config_file;    # Load the configuration file

if (ref $CONFIG ne 'HASH') {
    die "ERROR: Invalid configuration file!\n\t\$CONFIG is not an HASH ref!";
}

# Get valid config keys
my @valid_keys = grep { exists $CONFIG{$_} } keys %{$CONFIG};
@CONFIG{@valid_keys} = @{$CONFIG}{@valid_keys};

# Define the cache directory
if (not defined $CONFIG{cache_dir}) {

    my $cache_dir =
      ($ENV{XDG_CACHE_HOME} and -d -w $ENV{XDG_CACHE_HOME})
      ? $ENV{XDG_CACHE_HOME}
      : catdir($home_dir, '.cache');

    if (not -d -w $cache_dir) {
        $cache_dir = catdir(curdir(), '.cache');
    }

    $CONFIG{cache_dir} = catdir($cache_dir, 'fair-viewer');
}

# Create the cache directory (if needed)
foreach my $path ($CONFIG{cache_dir}) {
    next if -d $path;
    require File::Path;
    File::Path::make_path($path)
      or warn "[!] Can't create path <<$path>>: $!";
}

{
    my $split_string = sub {
        grep { $_ ne '' } split(/\W+/, CORE::fc($_[0]));
    };

    my %history_dict;

    sub update_history_dict {
        my (@entries) = @_;

        foreach my $str (@entries) {
            my $str_ref = \$str;

            # Create models from each word of the string
            foreach my $word ($split_string->($str)) {
                my $ref = \%history_dict;
                foreach my $char (split(//, $word)) {
                    $ref = $ref->{$char} //= {};
                    push @{$ref->{values}}, $str_ref;
                }
            }
        }
    }

    my $completion;

    sub analyze_text {
        my ($buffer) = @_;

        $completion // return;
        my $text   = $buffer->get_text;
        my @tokens = $split_string->($text);

        my (@words, @matches, %analyzed);
        foreach my $word (@tokens) {

            my $ref = \%history_dict;
            foreach my $char (split(//, $word)) {
                if (exists $ref->{$char}) {
                    $ref = $ref->{$char};
                }
                else {
                    $ref = undef;
                    last;
                }
            }

            if (defined $ref and exists $ref->{values}) {
                push @words, $word;
                foreach my $match (@{$ref->{values}}) {
                    if (not exists $analyzed{$match}) {
                        undef $analyzed{$match};
                        unshift @matches, $$match;
                    }
                }
            }
            else {
                @matches = ();    # don't include partial matches
                last;
            }
        }

        foreach my $token (@tokens) {
            @matches = grep { index(CORE::fc($_), $token) != -1 } @matches;
        }

        my $store = Gtk3::ListStore->new(['Glib::String']);

        my $i = 0;
        foreach my $str (
            map  { $_->[0] }
            sort { $b->[1] <=> $a->[1] }
            map {
                my @parts = $split_string->($_);

                my $end_w = $#words;
                my $end_p = $#parts;

                my $min_end = $end_w < $end_p ? $end_w : $end_p;

                my $order_score = 0;
                for (my $i = 0 ; $i <= $min_end ; ++$i) {
                    my $word = $words[$i];

                    for (my $j = $i ; $j <= $end_p ; ++$j) {

                        my $matched;
                        my $continue = 1;

                        my $part = $parts[$j];

                        while ($part eq $word) {
                            $order_score += 1 - 1 / (length($word) + 1)**2;
                            $matched ||= 1;
                            $part = $parts[++$j] // do { $continue = 0; last };
                            $word = $words[++$i] // do { $continue = 0; last };
                        }

                        if ($matched) {
                            if ($continue and index($part, $word) == 0) {
                                $order_score += 1 - 1 / (length($word) + 1);
                            }
                            last;
                        }
                        elsif (index($part, $word) == 0) {
                            $order_score += length($word) / length($part);
                            last;
                        }
                    }
                }

                my $prefix_score = 0;
                foreach my $i (0 .. $min_end) {
                    (
                     ($parts[$i] eq $words[$i])
                     ? do {
                         $prefix_score += 1;
                         1;
                       }
                     : (index($parts[$i], $words[$i]) == 0) ? do {
                         $prefix_score += length($words[$i]) / length($parts[$i]);
                         0;
                       }
                     : 0
                    )
                      || last;
                }

                ## printf("score('@parts', '@words') = %.4g + %.4g = %.4g\n",
                ##        $order_score, $prefix_score, $order_score + $prefix_score);

                [$_, $order_score + $prefix_score]
            } @matches
          ) {
            my $iter = $store->append;
            $store->set($iter, [0], [$str]);
            last if ++$i == $CONFIG{entry_completion_limit};
        }

        $completion->set_model($store);
    }

    my %history;
    my $history_fh;

    sub set_history {
        defined($history_fh) && return 1;

        # Open the history file for appending
        if (open($history_fh, '>>:utf8', $CONFIG{history_file})) {
            select((select($history_fh), $| = 1)[0]);    # autoflush
        }
        else {
            warn "[!] Can't open history file `$CONFIG{history_file}' for appending: $!";
            return;
        }

        # Slurp the history file into memory
        my @history;
        my @search_history;

        if (open(my $fh, '<:utf8', $CONFIG{history_file})) {
            chomp(@history = <$fh>);
        }

        foreach my $line (@history) {
            if (substr($line, 0, 1) eq '~') {
                $line = substr($line, 1);
            }
            else {
                unshift @search_history, $line;
            }
            undef $history{CORE::fc($line)};
        }

        require List::Util;

        # Workaround for List::Util < 1.45
        if (!defined(&List::Util::uniq)) {
            *List::Util::uniq = sub {
                my %seen;
                grep { !$seen{$_}++ } @_;
            };
        }

        # Keep only the most recent non-duplicated entries
        @history        = reverse(List::Util::uniq(reverse(@history)));
        @search_history = List::Util::uniq(@search_history);

        # Set entry completion
        $completion = Gtk3::EntryCompletion->new;
        $completion->set_match_func(sub { 1 });
        $completion->set_text_column(0);
        $search_entry->set_completion($completion);

        # Create the completion dictionary
        update_history_dict(@history);

        my $recent_top = $CONFIG{recent_history};

        if ($recent_top > scalar(@search_history)) {
            $recent_top = scalar(@search_history);
        }

        my @recent_history = grep { defined($_) } @search_history[0 .. $recent_top - 1];

        if (not @recent_history or $recent_top <= 0) {
            $gui->get_object('main-menu-history')->set_visible(0);
        }

        foreach my $text (@recent_history) {

            my $label = $text;
            if (length($label) > 30) {
                $label = substr($label, 0, 30) . '...';
            }

            my $item = 'Gtk3::ImageMenuItem'->new($label);
            $item->signal_connect(
                activate => sub {
                    $search_entry->set_text($text);
                    $search_entry->set_position(length($text));
                    search();
                }
            );
            $item->set_property(tooltip_text => "Search for „${text}”");
            $item->set_image('Gtk3::Image'->new_from_icon_name("system-search", q{menu}));
            $item->show;
            $history_menu->append($item);
        }

        # Keep only the most recent half of the history file when the limit has been reached
        if ($CONFIG{history_limit} > 0 and $#history >= $CONFIG{history_limit}) {

            # Try to create a backup, first
            require File::Copy;
            File::Copy::cp($CONFIG{history_file}, "$CONFIG{history_file}.bak");

            # Now, try to rewrite the history file
            if (open(my $fh, '>:utf8', $CONFIG{history_file})) {

                # Keep only the most recent half part of the history file
                say {$fh} join("\n", @history[($CONFIG{history_limit} >> 1) .. $#history]);
                close $fh;
            }
        }

        return 1;
    }

    sub append_to_history {
        my ($text, $is_search_keyword) = @_;

        my $str = join(' ', split(' ', $text));

        if ($is_search_keyword or not exists $history{CORE::fc($str)}) {
            if (set_history()) {

                if ($is_search_keyword) {
                    say {$history_fh} $str;
                }
                else {
                    say {$history_fh} "~" . $str;
                }
            }
            undef $history{CORE::fc($str)};
            update_history_dict($str);
        }
    }
}

# Locate hypervideo
if (not defined $CONFIG{ytdl_cmd}) {
    if (defined(my $path = which_command('hypervideo'))) {
        $CONFIG{ytdl_cmd} = $path;
    }
    else {
        $CONFIG{ytdl_cmd} = 'hypervideo';
    }
}

# Locate video player
if (not $CONFIG{video_player_selected}) {

    foreach my $key (sort keys %{$CONFIG{video_players}}) {
        if (defined(my $abs_player_path = which_command($CONFIG{video_players}{$key}{cmd}))) {
            $CONFIG{video_players}{$key}{cmd} = $abs_player_path;
            $CONFIG{video_player_selected} = $key;
            last;
        }
    }

    if (not $CONFIG{video_player_selected}) {
        warn "\n[!] Please install a supported video player! (e.g.: mpv)\n\n";
        $CONFIG{video_player_selected} = 'mpv';
    }
}

{
    my $update_config = 0;

    foreach my $key (keys %CONFIG) {
        if (not exists $CONFIG->{$key}) {
            $update_config = 1;
            last;
        }
    }

    dump_configuration() if $update_config;
}

# Locate a terminal
if (not defined $CONFIG{terminal}) {
    foreach my $term (
                      'gnome-terminal', 'lxterminal', 'terminal', 'xfce4-terminal',
                      'sakura',         'st',         'lilyterm', 'evilvte',
                      'superterm',      'terminator', 'kterm',    'mlterm',
                      'mrxvt',          'rxvt',       'urxvt',    'termite',
                      'termit',         'fbterm',     'stjerm',   'yakuake',
                      'tilix',          'roxterm',    'xterm',
      ) {
        if (defined(my $abs_path = which_command($term))) {
            $CONFIG{terminal} = $abs_path;

            # Some terminals require changing the default value of `terminal_exec`.
            # Probably more terminals require this modification. PRs are welcome.
            if (   $term eq 'st'
                or $term eq 'lxterminal') {
                $CONFIG{terminal_exec} = '-e %s';
            }

            last;
        }
    }

    $CONFIG{terminal} //= $ENV{TERM} || 'xterm';
}

my %ResultsHistory = (
                      current => -1,
                      results => [],
                     );

# Locate CLI fair-viewer
$CONFIG{pipe_viewer} //= which_command('fair-viewer') // 'fair-viewer';

my $yv_obj = WWW::FairViewer->new(
                                  escape_utf8 => 1,
                                  config_dir  => $config_dir,
                                  ytdl        => $CONFIG{ytdl},
                                  ytdl_cmd    => $CONFIG{ytdl_cmd},
                                  env_proxy   => $CONFIG{env_proxy},
                                  cache_dir   => $CONFIG{cache_dir},
                                  cookie_file => $CONFIG{cookie_file},
                                  user_agent  => $CONFIG{user_agent},
                                  timeout     => $CONFIG{timeout},
                                 );

#$yv_obj->load_authentication_tokens();

if (defined $yv_obj->get_access_token()) {
    show_user_panel();
}
else {
    $statusbar->push(1, 'Not logged in.');
}

require WWW::FairViewer::Utils;
my $yv_utils = WWW::FairViewer::Utils->new(thousand_separator => $CONFIG{thousand_separator},
                                           youtube_url_format => $CONFIG{youtube_video_url},);

# Set default combobox values
$definition_combobox->set_active(0);
$duration_combobox->set_active(0);
$caption_combobox->set_active(0);
$order_combobox->set_active(0);

# Spin button start with page
$spin_start_with_page->set_value(1);

sub apply_configuration {

    # Fullscreen mode
    $fullscreen_checkbutton->set_active($CONFIG{fullscreen});

    # Audio-only mode
    $audio_only_checkbutton->set_active($CONFIG{audio_only});

    # DASH mode
    $dash_checkbutton->set_active($CONFIG{dash});

    $clear_list_checkbutton->set_active($CONFIG{clear_search_list});
    $panel_account_type_combobox->set_active($CONFIG{active_panel_account_combobox});
    $channel_type_combobox->set_active($CONFIG{active_channel_type_combobox});
    $subscriptions_order_combobox->set_active($CONFIG{active_subscriptions_order_combobox});

    $published_within_combobox->set_active(0);

    foreach my $option_name (
                             qw(
                             maxResults videoDimension videoLicense
                             region debug http_proxy user_agent
                             timeout cookie_file ytdl ytdl_cmd
                             api_host prefer_mp4 prefer_av1
                             comments_order prefer_invidious
                             )
      ) {

        if (defined $CONFIG{$option_name}) {
            my $code      = \&{"WWW::FairViewer::set_$option_name"};
            my $value     = $CONFIG{$option_name};
            my $set_value = $yv_obj->$code($value);

            if (not defined($set_value) or $set_value ne $value) {
                warn "[!] Invalid value <$value> for option <$option_name>.\n";
            }
        }
    }

    # Maximum number of results per page
    $spin_results->set_value($CONFIG{maxResults});

    # Enable/disable thumbnails
    $thumbs_checkbutton->set_active($CONFIG{show_thumbs});

    # Set the "More options" expander
    $more_options_expander->set_expanded($CONFIG{active_more_options_expander});

    my %resolution = (
                      'best' => 0,
                      '2160' => 1,
                      '1440' => 2,
                      '1080' => 3,
                      '720'  => 4,
                      '480'  => 5,
                      '360'  => 6,
                      '240'  => 7,
                     );

    my $name = ($CONFIG{resolution} =~ /^(\d+)/) ? $1 : $CONFIG{resolution};

    if (exists $resolution{$name}) {
        $resolution_combobox->set_active($resolution{$name});
    }
    else {
        $resolution_combobox->set_active($CONFIG{active_resolution_combobox});
    }

    # Resize the main window
    $mainw->set_default_size(split(/x/i, $CONFIG{mainw_size}, 2));

    # Center the main window
    if ($CONFIG{mainw_centered}) {
        $mainw->set_position("center");
    }

    $mainw->reshow_with_initial_size;

    if ($CONFIG{mainw_maximized}) {
        $mainw->maximize();
    }

    if ($CONFIG{mainw_fullscreen}) {
        maximize_unmaximize_mainw();
    }

    # Support for history input
    if ($CONFIG{history}) {
        set_history();
    }

    # HPaned position correction
    if ($CONFIG{hpaned_position} >= ($mainw->get_size)[0] - 200) {
        $CONFIG{hpaned_position} = ($mainw->get_size)[0] - $CONFIG{hpaned_width};
    }

    # Set HPaned position
    $hbox2->set_position($CONFIG{hpaned_position});

    # Select text from text entry
    $search_entry->select_region(0, -1);
}

# Apply the configuration file
apply_configuration();

# YouTube usernames
set_usernames();

sub donate {
    open_external_url('https://www.hyperbola.info/donate/');
}

# Set text to a 'textview' object
sub set_text {
    my ($object, $text, %args) = @_;
    my $object_buffer = $object->get_buffer;

    require Encode;

    if (!Encode::is_utf8($text)) {
        $text = Encode::decode_utf8($text);
    }

    if ($args{append}) {
        my $iter = $object_buffer->get_end_iter;
        $object_buffer->insert($iter, $text);
    }
    else {
        $object_buffer->set_text($text);
    }
    $object->set_buffer($object_buffer);
    return 1;
}

# Get text from a 'textview' object
sub get_text {
    my ($object)      = @_;
    my $object_buffer = $object->get_buffer;
    my $start_iter    = $object_buffer->get_start_iter;
    my $end_iter      = $object_buffer->get_end_iter;
    $object_buffer->get_text($start_iter, $end_iter, undef);
}

sub new_image_from_pixbuf {
    my ($object_name, $pixbuf) = @_;
    my $object = $gui->get_object($object_name) // return;
    scalar($object->new_from_pixbuf($pixbuf));
}

# Setting application icons
{
    $gui->get_object('username_list')->set_image(new_image_from_pixbuf('icon_from_pixbuf', $user_icon_pixbuf));
    $gui->get_object('uploads_button')->set_image(new_image_from_pixbuf('icon_from_pixbuf', $user_icon_pixbuf));
    $gui->get_object('button6')->set_image(new_image_from_pixbuf('icon_from_pixbuf', $feed_icon_pixbuf));
}

# Treeview signals
{
    $treeview->signal_connect('button_press_event', \&menu_popup);
    $treeview->signal_connect('size-allocate',      \&treeview_scroll_to_end) if $CONFIG{autoscroll_to_end};
    $users_treeview->signal_connect('button_press_event', \&users_menu_popup);
}

# Scroll treeview to end
sub treeview_scroll_to_end {
    my ($widget) = @_;
    my $adj = $widget->get_vadjustment;
    $adj->set_value($adj->get_upper - $adj->get_page_size);
}

# Menu popup
sub menu_popup {
    my ($treeview, $event) = @_;

    # Ignore non-right-clicks
    if ($event->button != 3) {
        return 0;
    }

    ##my ($path, $col, $cell_x, $cell_y) = ...;
    my $path = ($treeview->get_path_at_pos($event->x, $event->y))[0] // return 0;

    my $selection = $treeview->get_selection;
    $selection->select_path($path);

    my $iter = $selection->get_selected() // return 0;
    my $type = $liststore->get($iter, 7);

    # Ignore the right-click on 'next-page' entry
    $type eq 'next_page' and return 0;

    # Create the main right-click menu
    my $menu = 'Gtk3::Menu'->new;

    # More details
    {
        my $item = 'Gtk3::ImageMenuItem'->new("Show more details");
        $item->set_image('Gtk3::Image'->new_from_icon_name("window-new", q{menu}));
        $item->signal_connect(activate => \&show_details_window);
        $item->show;
        $menu->append($item);
    }

    # Video menu
    if ($type eq 'video') {

        my $video_id   = $liststore->get($iter, 3);
        my $video_data = $yv_obj->parse_json_string($liststore->get($iter, 8));

        # Youtube comments
        {
            my $item = 'Gtk3::ImageMenuItem'->new("YouTube comments");
            $item->set_image('Gtk3::Image'->new_from_icon_name("edit-copy", q{menu}));
            $item->signal_connect(activate => \&show_comments_window);
            $item->show;
            $menu->append($item);
        }

        # Separator
        {
            my $item = 'Gtk3::SeparatorMenuItem'->new;
            $item->show;
            $menu->append($item);
        }

        # Video submenu
        {
            my $video = 'Gtk3::Menu'->new;
            my $cat   = 'Gtk3::ImageMenuItem'->new("Video");
            $cat->set_image('Gtk3::Image'->new_from_icon_name("video-x-generic", q{menu}));
            $cat->show;

            # Play
            {
                my $item = 'Gtk3::ImageMenuItem'->new("Play");
                $item->signal_connect(activate => \&get_code);
                $item->set_property(tooltip_text => "Play the video");
                $item->set_image('Gtk3::Image'->new_from_icon_name("media-playback-start-symbolic", q{menu}));
                $item->show;
                $video->append($item);
            }

            # Enqueue
            {
                my $item = 'Gtk3::ImageMenuItem'->new("Enqueue");
                $item->signal_connect(activate => sub { enqueue_video() });
                $item->set_property(tooltip_text => "Enqueue video to play it later");
                $item->set_image('Gtk3::Image'->new_from_icon_name("list-add-symbolic", q{menu}));
                $item->show;
                $video->append($item);
            }

            # Favorite
            {
                my $item = 'Gtk3::ImageMenuItem'->new("Favorite");
                $item->set_property(tooltip_text => "Save the video in the playlist of favorite videos");
                $item->signal_connect(
                    activate => sub {
                        say(":: Favorite video: ", $yv_utils->get_title($video_data)) if $yv_obj->get_debug;
                        prepend_video_data_to_file($video_data, $favorite_videos_data_file);
                    }
                );
                $item->set_image('Gtk3::Image'->new_from_icon_name("starred-symbolic", q{menu}));
                $item->show;
                $video->append($item);
            }

            # Download
            {
                my $item = 'Gtk3::ImageMenuItem'->new("Download");
                $item->set_property(tooltip_text => "Download the video");
                $item->signal_connect(activate => \&download_video);
                $item->set_image('Gtk3::Image'->new_from_icon_name("document-save-symbolic", q{menu}));
                $item->show;
                $video->append($item);
            }

            # Separator
            {
                my $item = 'Gtk3::SeparatorMenuItem'->new;
                $item->show;
                $video->append($item);
            }

            # Like
            {
                my $item = 'Gtk3::ImageMenuItem'->new("Like");
                $item->set_property(tooltip_text => "Save video in the playlist of liked videos");
                $item->signal_connect(
                    activate => sub {
                        say(":: Liking video: ", $yv_utils->get_title($video_data)) if $yv_obj->get_debug;
                        prepend_video_data_to_file($video_data, $liked_videos_data_file);
                    }
                );
                $item->set_image('Gtk3::Image'->new_from_icon_name("go-up-symbolic", q{menu}));
                $item->show;
                $video->append($item);
            }

            # Disike
            {
                my $item = 'Gtk3::ImageMenuItem'->new("Dislike");
                $item->set_property(tooltip_text => "Save video in the playlist of disliked videos");
                $item->signal_connect(
                    activate => sub {
                        say(":: Disliking video: ", $yv_utils->get_title($video_data)) if $yv_obj->get_debug;
                        prepend_video_data_to_file($video_data, $disliked_videos_data_file);
                    }
                );
                $item->set_image('Gtk3::Image'->new_from_icon_name("go-down-symbolic", q{menu}));
                $item->show;
                $video->append($item);
            }

            # Separator
            {
                my $item = 'Gtk3::SeparatorMenuItem'->new;
                $item->show;
                $video->append($item);
            }

            # Related videos
            {
                my $item = 'Gtk3::ImageMenuItem'->new("Related videos");
                $item->set_property(tooltip_text => "Display videos that are related to this video");
                $item->signal_connect(activate => \&show_related_videos);
                $item->set_image('Gtk3::Image'->new_from_icon_name("video-x-generic-symbolic", q{menu}));
                $item->show;
                $video->append($item);
            }

            # Open the YouTube video page
            {
                my $item = 'Gtk3::ImageMenuItem'->new("YouTube page");
                $item->signal_connect(activate => sub { open_external_url(make_youtube_url('video', $video_id)) });
                $item->set_property(tooltip_text => "Open the YouTube page of this video");
                $item->set_image('Gtk3::Image'->new_from_icon_name("applications-internet-symbolic", q{menu}));
                $item->show;
                $video->append($item);
            }

            $cat->set_submenu($video);
            $menu->append($cat);
        }
    }
    elsif ($type eq 'playlist') {

        my $playlist_id = $liststore->get($iter, 3);

        # Playlist videos
        {
            my $item = 'Gtk3::ImageMenuItem'->new("Videos");
            $item->set_property(tooltip_text => "Display the videos from this playlist");
            $item->signal_connect(activate => sub { list_playlist($playlist_id) });
            $item->set_image('Gtk3::Image'->new_from_icon_name("folder-open", q{menu}));
            $item->show;
            $menu->append($item);
        }

        # Separator
        {
            my $item = 'Gtk3::SeparatorMenuItem'->new;
            $item->show;
            $menu->append($item);
        }
    }

    my $channel_id = $liststore->get($iter, 6);

    # Author submenu
    {
        my $author = 'Gtk3::Menu'->new;
        my $cat    = 'Gtk3::ImageMenuItem'->new("Author");
        $cat->set_image('Gtk3::Image'->new_from_pixbuf($user_icon_pixbuf));
        $cat->show;

        # Recent uploads from this author
        {
            my $item = 'Gtk3::ImageMenuItem'->new("Uploads");
            $item->signal_connect(activate => sub { uploads('channel', $channel_id) });
            $item->set_property(tooltip_text => "Show the most recent videos from this author");
            $item->set_image('Gtk3::Image'->new_from_icon_name("emblem-shared-symbolic", q{menu}));
            $item->show;
            $author->append($item);
        }

        # Most popular uploads from this author
        {
            my $item = 'Gtk3::ImageMenuItem'->new("Popular");
            $item->signal_connect(activate => sub { popular_uploads('channel', $channel_id) });
            $item->set_property(tooltip_text => "Show the most popular videos from this author");
            $item->set_image('Gtk3::Image'->new_from_icon_name("emblem-videos-symbolic", q{menu}));
            $item->show;
            $author->append($item);
        }

        # Playlists created by this author
        {
            my $item = 'Gtk3::ImageMenuItem'->new("Playlists");
            $item->signal_connect(activate => \&show_playlists_from_selected_author);
            $item->set_property(tooltip_text => "Show playlists created by this author");
            $item->set_image('Gtk3::Image'->new_from_icon_name("emblem-documents-symbolic", q{menu}));
            $item->show;
            $author->append($item);
        }

        # Favorites of this author
        {
            my $item = 'Gtk3::ImageMenuItem'->new("Favorites");
            $item->signal_connect(activate => sub { favorites('channel', $channel_id) });
            $item->set_property(tooltip_text => "Show favorite videos of this author");
            $item->set_image('Gtk3::Image'->new_from_icon_name("emblem-favorite-symbolic", q{menu}));
            $item->show;
            $author->append($item);
        }

        # Recent channel activity events
#<<<
        #~ {
            #~ my $item = 'Gtk3::ImageMenuItem'->new("Activities");
            #~ $item->signal_connect(activate => sub { activities('channel', $channel_id) });
            #~ $item->set_property(tooltip_text => "Show recent channel activity events");
            #~ $item->set_image('Gtk3::Image'->new_from_icon_name("view-refresh-symbolic", q{menu}));
            #~ $item->show;
            #~ $author->append($item);
        #~ }
#>>>

        # Liked videos by this author
#<<<
        #~ {
            #~ my $item = 'Gtk3::ImageMenuItem'->new("Likes");
            #~ $item->signal_connect(activate => sub { likes('channel', $channel_id) });
            #~ $item->set_property(tooltip_text => "Show liked videos by this author");
            #~ $item->set_image('Gtk3::Image'->new_from_icon_name("emblem-default-symbolic", q{menu}));
            #~ $item->show;
            #~ $author->append($item);
        #~ }
#>>>

        # Separator
        {
            my $item = 'Gtk3::SeparatorMenuItem'->new;
            $item->show;
            $author->append($item);
        }

        my $channel_data = $yv_obj->parse_json_string($liststore->get($iter, 8));
        my $channel_name = $yv_utils->get_channel_title($channel_data);

        # Subscribe to channel
        {
            my $item = 'Gtk3::ImageMenuItem'->new("Subscribe");
            $item->signal_connect(activate => sub { save_channel_by_id($channel_id, $channel_name, subscribe => 1) });
            $item->set_property(tooltip_text => "Subscribe to this channel");
            $item->set_image('Gtk3::Image'->new_from_pixbuf($feed_icon_gray_pixbuf));
            $item->show;
            $author->append($item);
        }

        # Save channel in the user-list
        {
            my $item = 'Gtk3::ImageMenuItem'->new("Save channel");
            $item->set_property(tooltip_text => "Save the channel in the user-list");
            $item->signal_connect(activate => sub { save_channel_by_id($channel_id, $channel_name) });
            $item->set_image('Gtk3::Image'->new_from_icon_name("star-new-symbolic", q{menu}));
            $item->show;
            $author->append($item);
        }

        # Open the YouTube channel page
        {
            my $item = 'Gtk3::ImageMenuItem'->new("YouTube page");
            $item->signal_connect(activate => sub { open_external_url(make_youtube_url('channel', $channel_id)) });
            $item->set_property(tooltip_text => "Open the YouTube page of this channel");
            $item->set_image('Gtk3::Image'->new_from_icon_name("applications-internet-symbolic", q{menu}));
            $item->show;
            $author->append($item);
        }

        if ($type eq 'video' or $type eq 'playlist') {
            $cat->set_submenu($author);
            $menu->append($cat);
        }
        else {
            $menu = $author;
        }
    }

    if (@VIDEO_QUEUE) {

        # Separator
        {
            my $item = 'Gtk3::SeparatorMenuItem'->new;
            $item->show;
            $menu->append($item);
        }

        # Play enqueued videos
        {
            my $item = 'Gtk3::ImageMenuItem'->new("Play enqueued videos");
            $item->signal_connect(activate => \&play_enqueued_videos);
            $item->set_property(tooltip_text => "Play the enqueued videos (if any)");
            $item->set_image('Gtk3::Image'->new_from_icon_name("media-playback-start", q{menu}));
            $item->show;
            $menu->append($item);
        }
    }

    if ($type eq 'video' or $type eq 'playlist') {

        # Separator
        {
            my $item = 'Gtk3::SeparatorMenuItem'->new;
            $item->show;
            $menu->append($item);
        }

        # Play as audio
        {
            my $item = 'Gtk3::ImageMenuItem'->new("Play as audio");
            $item->signal_connect(
                activate => sub {
                    my ($id, $iter) = get_selected_entry_code();
                    my $type = $liststore->get($iter, 7);
                    if (defined($id) and $type eq 'video') {
                        execute_cli_pipe_viewer("--id=$id --no-video");
                    }
                    elsif (defined($id) and $type eq 'playlist') {
                        execute_cli_pipe_viewer("--pp=$id --no-video");
                    }
                }
            );
            $item->set_property(tooltip_text => "Play as audio in a new terminal");
            $item->set_image('Gtk3::Image'->new_from_icon_name("audio-headphones", q{menu}));
            $item->show;
            $menu->append($item);
        }

        # Play with CLI fair-viewer
        {
            my $item = 'Gtk3::ImageMenuItem'->new("Play in terminal");
            $item->signal_connect(activate => \&play_selected_video_with_cli_pipe_viewer);
            $item->set_property(tooltip_text => "Play with fair-viewer in a new terminal");
            $item->set_image('Gtk3::Image'->new_from_icon_name("computer", q{menu}));
            $item->show;
            $menu->append($item);
        }
    }

    $menu->popup(undef, undef, undef, undef, $event->button, $event->time);
    return 0;
}

sub users_menu_popup {
    my ($treeview, $event) = @_;

    if ($event->button != 3) {
        return 0;
    }

    # Hardcoded menu
    #my $menu = $gui->get_object('user_option_menu');

    # Dynamic menu
    my $path = ($treeview->get_path_at_pos($event->x, $event->y))[0] // return 0;

    my $selection = $treeview->get_selection;
    $selection->select_path($path);

    my $iter = $selection->get_selected() // return 0;

    my $channel_id   = $users_liststore->get($iter, 0);
    my $channel_name = $users_liststore->get($iter, 1);

    # Create the main right-click menu
    my $menu = 'Gtk3::Menu'->new;

    # Videos from channel
    {
        my $item = 'Gtk3::ImageMenuItem'->new("Videos");
        $item->set_image('Gtk3::Image'->new_from_icon_name("applications-multimedia", q{menu}));
        $item->set_property(tooltip_text => "List the latest videos from this channel");
        $item->signal_connect(activate => \&videos_from_selected_username);
        $item->show;
        $menu->append($item);
    }

    # Playlists from channel
    {
        my $item = 'Gtk3::ImageMenuItem'->new("Playlists");
        $item->set_image('Gtk3::Image'->new_from_icon_name("emblem-documents", q{menu}));
        $item->set_property(tooltip_text => "List the playlists created by this channel");
        $item->signal_connect(activate => \&playlists_from_selected_username);
        $item->show;
        $menu->append($item);
    }

    # Subscribe / unsubscribe from channel
    {
        my $item = 'Gtk3::ImageMenuItem'->new($subscribed_channels{$channel_id} ? "Unsubscribe" : "Subscribe");
        $subscribed_channels{$channel_id}
          ? $item->set_image('Gtk3::Image'->new_from_pixbuf($feed_icon_gray_pixbuf))
          : $item->set_image('Gtk3::Image'->new_from_pixbuf($feed_icon_pixbuf));
        $item->signal_connect(activate => \&subscribe_toggle_selected_username);
        $item->show;
        $menu->append($item);
    }

    # Remove the channel
    {
        my $item = 'Gtk3::ImageMenuItem'->new("Remove");
        $item->set_image('Gtk3::Image'->new_from_icon_name("gtk-remove", q{menu}));
        $item->set_property(tooltip_text => "Remove the channel from this list");
        $item->signal_connect(activate => \&remove_selected_username);
        $item->show;
        $menu->append($item);
    }

    $menu->popup(undef, undef, undef, undef, $event->button, $event->time);
    return 0;
}

# Setting help text
set_text(
    $textview_help, <<"HELP_TEXT"

# Key binds

    CTRL+H : help window
    CTRL+L : login window
    CTRL+P : preferences window
    CTRL+Y : start CLI Fair Viewer
    CTRL+E : enqueue the selected video

    CTRL+U : show the saved user-list
    CTRL+D : show more details for a selected entry
    CTRL+W : show the warnings window
    CTRL+G : show favorite videos of the author of a selected video
    CTRL+R : show related videos for a selected video
    CTRL+M : show videos from the author of a selected video
    CTRL+K : show playlists from the author of a selected video
    CTRL+S : add the author of a selected video to the user-list
    CTRL+Q : close the application

    DEL    : remove the selected entry from the list
    F11    : minimize-maximize the main window

HELP_TEXT
);

{
    my $font = Pango::FontDescription::from_string('Monospace 8');
    $textview_help->modify_font($font);
}

# ------------------- Accels ------------------- #

# Main window
my $accel = Gtk3::AccelGroup->new;
$accel->connect(ord('h'), ['control-mask'], ['visible'], \&show_help_window);
$accel->connect(ord('e'), ['control-mask'], ['visible'], \&enqueue_video);
$accel->connect(ord('l'), ['control-mask'], ['visible'], \&show_login_to_youtube_window);
$accel->connect(ord('p'), ['control-mask'], ['visible'], \&show_preferences_window);
$accel->connect(ord('q'), ['control-mask'], ['visible'], \&on_mainw_destroy);
$accel->connect(ord('u'), ['control-mask'], ['visible'], \&show_users_list_window);
$accel->connect(ord('y'), ['control-mask'], ['visible'], \&run_cli_pipe_viewer);
$accel->connect(ord('d'), ['control-mask'], ['visible'], \&show_details_window);

#$accel->connect(ord('c'), ['control-mask'], ['visible'], \&show_comments_window);
$accel->connect(ord('s'), ['control-mask'], ['visible'], \&add_user_to_favorites);
$accel->connect(ord('r'), ['control-mask'], ['visible'], \&show_related_videos);
$accel->connect(ord('g'), ['control-mask'], ['visible'], \&show_user_favorite_videos);
$accel->connect(ord('m'), ['control-mask'], ['visible'], \&show_videos_from_selected_author);
$accel->connect(ord('k'), ['control-mask'], ['visible'], \&show_playlists_from_selected_author);
$accel->connect(ord('w'), ['control-mask'], ['visible'], \&show_warnings_window);
$accel->connect(0xffff,   ['lock-mask'],    ['visible'], \&delete_selected_row);
$accel->connect(0xffc8,   ['lock-mask'],    ['visible'], \&maximize_unmaximize_mainw);
$mainw->add_accel_group($accel);

# Support for navigating back and forth using the side buttons of the mouse
$mainw->signal_connect(
    'button-release-event' => sub {
        my (undef, $event) = @_;

        my $button = $event->button;

        if ($button == 8) {
            display_previous_results();
        }
        elsif ($button == 9) {
            display_next_results();
        }
    }
);

# Other windows (ESC key to close them)
$accel = Gtk3::AccelGroup->new;
$accel->connect(0xff1b, ['lock-mask'], ['visible'], \&hide_users_list_window);
$users_list_window->add_accel_group($accel);

$accel = Gtk3::AccelGroup->new;
$accel->connect(0xff1b, ['lock-mask'], ['visible'], \&hide_feeds_window);
$feeds_window->add_accel_group($accel);

$accel = Gtk3::AccelGroup->new;
$accel->connect(0xff1b,   ['lock-mask'],    ['visible'], \&hide_preferences_window);
$accel->connect(ord('s'), ['control-mask'], ['visible'], \&save_configuration);
$prefernces_window->add_accel_group($accel);

$accel = Gtk3::AccelGroup->new;
$accel->connect(0xff1b, ['lock-mask'], ['visible'], \&hide_help_window);
$help_window->add_accel_group($accel);

$accel = Gtk3::AccelGroup->new;
$accel->connect(0xff1b, ['lock-mask'], ['visible'], \&hide_details_window);
$details_window->add_accel_group($accel);

# ------------------ Authentication ------------------ #

sub show_user_panel {
    change_subscription_page(1);
    $statusbar->push(1, "Logged in.");
    return 1;
}

# ------------------ Showing/Hidding windows ------------------ #

# Main window
sub maximize_unmaximize_mainw {
    state $maximized = 0;
    $maximized++ % 2
      ? $mainw->unfullscreen
      : $mainw->fullscreen;
}

# Users list window
sub show_users_list_window {
    $users_list_window->show;
    return 1;
}

sub hide_users_list_window {
    $users_list_window->hide;
    return 1;
}

# Help window
sub show_help_window {
    $help_window->show;
    return 1;
}

sub hide_help_window {
    $help_window->hide;
    return 1;
}

# Warnings window

sub show_warnings_window {
    $warnings_window->show;
    return 1;
}

sub hide_warnings_window {
    $warnings_window->hide;
    return 1;
}

# About Window
sub show_about_window {
    $about_window->set_program_name("$appname $version");
    $about_window->set_logo($app_icon_pixbuf);
    $about_window->set_resizable(1);
    $about_window->show;
    return 1;
}

sub hide_about_window {
    $about_window->hide;
    return 1;
}

# Error window
sub hide_errors_window {
    $errors_window->hide;
    return 1;
}

# Login window
sub show_login_to_youtube_window {
    $login_to_youtube->show;
    return 1;
}

sub hide_login_to_youtube_window {
    $login_to_youtube->hide;
    return 1;
}

# Details window
sub show_details_window {
    my ($code, $iter) = get_selected_entry_code();
    $code // return;

    my $type = $liststore->get($iter, 7);

    if ($type eq 'next_page') {
        return 1;
    }

    $details_window->show;
    Glib::Idle->add(sub { set_entry_details($code, $iter); return 0 }, [], Glib::G_PRIORITY_LOW);
    return 1;
}

sub hide_details_window {
    $details_window->hide;
    return 1;
}

sub set_comments {
    my $videoID = get_selected_entry_code(type => 'video') // return;
    $feeds_liststore->clear;
    display_comments($yv_obj->comments_from_video_id($videoID));
}

# Comments window
sub show_comments_window {
    my ($videoID, $iter) = get_selected_entry_code(type => 'video');
    $videoID // return;

    my $info = $liststore->get($iter, 0);
    my ($video_title) = $info =~ m{^.*?(<big><b>.*?</b></big>)}s;

    $feeds_title->set_markup("<big>$video_title</big>");
    $feeds_title->set_tooltip_markup("$video_title");

    $feeds_window->show;
    $feeds_statusbar->pop(0);

    Glib::Idle->add(
        sub {
            display_comments($yv_obj->comments_from_video_id($videoID));
            return 0;
        },
        [],
        Glib::G_PRIORITY_LOW
                   );

    return 1;
}

sub hide_feeds_window {
    $feeds_liststore->clear;
    $feeds_window->hide;
    return 1;
}

# Preferences window
sub show_preferences_window {
    require Data::Dump;
    get_main_window_size();
    my $config_view_buffer = $config_view->get_buffer;
    $config_view_buffer->set_text(Data::Dump::dump({map { ($_, $CONFIG{$_}) } grep { not /^active_/ } keys %CONFIG}));
    $config_view->set_buffer($config_view_buffer);
    state $font = Pango::FontDescription::from_string('Monospace 8');
    $config_view->modify_font($font);
    $prefernces_window->show;
    return 1;
}

sub hide_preferences_window {
    $prefernces_window->hide;
    return 1;
}

# Save plaintext config to file
sub save_configuration {
    my $config = get_text($config_view);

    my $hash_ref = eval $config;

    print STDERR $@ if $@;
    die $@          if $@;

    %CONFIG = (%CONFIG, %{$hash_ref});
    dump_configuration();

    apply_configuration();
    hide_preferences_window();
    return 1;
}

sub delete_selected_row {
    my (undef, $iter) = get_selected_entry_code();
    $iter // return;
    $liststore->remove($iter);
    return 1;
}

# Combo boxes changes
sub combobox_order_changed {
    $yv_obj->set_order($order_combobox->get_active_text);
}

sub combobox_resolution_changed {
    $CONFIG{active_resolution_combobox} = $resolution_combobox->get_active;
    my $res = $resolution_combobox->get_active_text;
    $CONFIG{resolution} = $res =~ /^(\d+)p\z/ ? $1 : $res;
}

sub combobox_duration_changed {
    my $text = $duration_combobox->get_active_text;
    $yv_obj->set_videoDuration($text);
}

sub combobox_caption_changed {
    my $text = $caption_combobox->get_active_text;
    $yv_obj->set_videoCaption($text);
}

sub combobox_subscriptions_order_changed {
    $CONFIG{active_subscriptions_order_combobox} = $subscriptions_order_combobox->get_active;
    $yv_obj->set_subscriptions_order($subscriptions_order_combobox->get_active_text);
}

sub combobox_panel_account_changed {
    my $text = $panel_account_type_combobox->get_active_text;
    $CONFIG{active_panel_account_combobox} = $panel_account_type_combobox->get_active;
    if ($text =~ /^(mine|myself)/i) {
        $panel_user_entry->hide;
    }
    else {
        $panel_user_entry->show;
    }
}

sub combobox_channel_type_changed {
    $CONFIG{active_channel_type_combobox} = $channel_type_combobox->get_active;
}

sub combobox_definition_changed {
    my $text = $definition_combobox->get_active_text;
    $yv_obj->set_videoDefinition($text);
}

sub combobox_license_changed {
    my $text = $license_combobox->get_active_text;
    $yv_obj->set_videoLicense($text);
}

sub combobox_published_within_changed {

    my $period = $published_within_combobox->get_active_text;

    if ($period =~ /^any/) {
        $yv_obj->set_date(undef);
    }
    else {
        $yv_obj->set_date($period);
    }
}

# Spin buttons changes
sub spin_results_per_page_changed {
    $yv_obj->set_maxResults($CONFIG{maxResults} = $spin_results->get_value);
}

# Page number
sub spin_start_with_page_changed {
    $yv_obj->set_page($spin_start_with_page->get_value);
}

# Clear search list
sub toggled_clear_search_list {
    $CONFIG{clear_search_list} = $clear_list_checkbutton->get_active() || 0;
}

# Fullscreen mode
sub toggled_fullscreen {
    $CONFIG{fullscreen} = $fullscreen_checkbutton->get_active() || 0;
}

# Audio-only mode
sub toggled_audio_only {
    $CONFIG{audio_only} = $audio_only_checkbutton->get_active() || 0;
}

# DASH mode
sub toggled_dash_support {
    $CONFIG{dash} = $dash_checkbutton->get_active() || 0;
}

# Check buttons toggles
sub thumbs_checkbutton_toggled {
    $CONFIG{show_thumbs} = ($_[0]->get_active() || 0);
    $thumbs_column->set_visible($CONFIG{show_thumbs});
}

# "More options" expander
sub activate_more_options_expander {
    $CONFIG{active_more_options_expander} = $_[0]->get_expanded() ? 0 : 1;
}

# Get main window size
sub get_main_window_size {
    $CONFIG{mainw_size} = join('x', $mainw->get_size);
}

sub main_window_state_events {
    my (undef, $state) = @_;

    my $windowstate = $state->new_window_state();
    my @states      = split(' ', $windowstate);

    $CONFIG{mainw_maximized}  = (grep { $_ eq 'maximized' } @states)  ? 1 : 0;
    $CONFIG{mainw_fullscreen} = (grep { $_ eq 'fullscreen' } @states) ? 1 : 0;

    return 1;
}

sub add_category_header {
    my ($text) = @_;
    my $iter = $cats_liststore->append;
    $cats_liststore->set($iter, [0], ["<big><b>\t$text</b></big>"]);
    return 1;
}

sub append_categories {
    my ($categories, $type) = @_;

    foreach my $category (@$categories) {

        my $label = $category->{title};
        my $id    = $category->{id};

        $label =~ s{&}{&amp;}g;

        my $iter = $cats_liststore->append;

        $cats_liststore->set(
                             $iter,
                             0 => $label,
                             1 => $id,
                             2 => $feed_icon_pixbuf,
                             3 => $type,
                            );
    }
    return 1;
}

append_categories($yv_obj->video_categories, 'cat');

my $tops_liststore = $gui->get_object('liststore6');
my $tops_treeview  = $gui->get_object('treeview4');

sub add_top_row {
    my ($top_name, $top_type) = @_;

    (my $top_label = ucfirst $top_name) =~ tr/_/ /;
    my $iter = $tops_liststore->append;

    $tops_liststore->set(
                         $iter,
                         0 => $top_label,
                         1 => $feed_icon_pixbuf,
                         2 => $top_name,
                         3 => $top_type,
                        );
}

my $playlists_liststore = $gui->get_object('liststore6');
my $playlists_treeview  = $gui->get_object('treeview4');

sub add_local_playlist_row {
    my ($playlist_name, $playlist_file) = @_;

    my $iter = $playlists_liststore->append;

    $playlists_liststore->set(
                              $iter,
                              0 => encode_entities($playlist_name),
                              1 => $feed_icon_gray_pixbuf,
                              2 => $playlist_name,
                              3 => $playlist_file,
                             );
}

sub set_local_playlists {
    my ($top_time, $main_label) = @_;

    my @playlist_files = reverse $yv_utils->get_local_playlist_filenames($local_playlists_dir);

    foreach my $file (@playlist_files) {
        my $snippet = $yv_utils->local_playlist_snippet($file);
        add_local_playlist_row($yv_utils->get_title($snippet), $file);
    }
}

set_local_playlists();

# ------------ Usernames list window ------------ #
sub set_usernames {
    if (-e $CONFIG{youtube_users_file}) {
        %channels = (
                     %channels,
                     (
                      map    { @$_ }
                        grep { not exists $removed_channels{$_->[0]} }
                        $yv_utils->read_channels_from_file($CONFIG{youtube_users_file})
                     )
                    );
    }
    else {
        # Default channels
        %channels = (
                     'UC1_uAIS3r8Vu6JjXWvastJg' => 'Mathologer',
                     'UCSju5G2aFaWMqn-_0YBtq5A' => 'Stand-Up Maths',
                     'UC-WICcSW1k3HsScuXxDrp0w' => 'Curry On!',
                     'UCShHFwKyhcDo3g7hr4f1R8A' => 'World Science Festival',
                     'UCYO_jab_esuFRV4b17AJtAw' => '3Blue1Brown',
                     'UCWnPjmqvljcafA0z2U1fwKQ' => 'Confreaks',
                     'UC_QIfHvN9auy2CoOdSfMWDw' => 'Strange Loop',
                     'UCseUQK4kC3x2x543nHtGpzw' => 'Brian Will',
                     'UC9-y-6csu5WGm29I7JiwpnA' => 'Computerphile',
                     'UCoxcjq-8xIDTYp3uz647V5A' => 'Numberphile',
                     'UCvBqzzvUBLCs8Y7Axb-jZew' => 'Sixty Symbols',
                     'UC6107grRI4m0o2-emgoDnAA' => 'SmarterEveryDay',
                     'UCF6F8LdCSWlRwQm_hfA2bcQ' => 'Coding Math',
                     'UC1znqKFL3jeR0eoA0pHpzvw' => 'SpaceRip',
                     'UCvjgXvBlbQiydffZU7m1_aw' => 'The Coding Train',
                     'UC0wbcfzV-bHhABbWGXKHwdg' => 'Utah Open Source',
                     'UCotwjyJnb-4KW7bmsOoLfkg' => 'Art of the Problem',
                     'UC7y4qaRSb5w2O8cCHOsKZDw' => 'YAPC NA',
                     'UCGHZpIpAWJQ-Jy_CeCdXhMA' => 'Cool Worlds',
                     'UCmG6gHgD8JaEZVxuHWJijGQ' => 'UConn Mathematics',
                     'UC81mayGa63QaJE1SjKIYp0w' => 'metaRising',
                     'UCSHZKyawb77ixDdsGog4iWA' => 'Lex Fridman',
                     'UCBa659QWEk1AI4Tg--mrJ2A' => 'Tom Scott',
                    );
    }

    if (-e $CONFIG{subscribed_channels_file}) {
        %subscribed_channels = (
                                %subscribed_channels,
                                (
                                 map    { @$_ }
                                   grep { not exists $unsubbed_channels{$_->[0]} }
                                   grep { not exists $removed_channels{$_->[0]} }
                                   $yv_utils->read_channels_from_file($CONFIG{subscribed_channels_file})
                                )
                               );
    }

    $users_liststore->clear;    # clear the list

    foreach my $channel (sort { CORE::fc($channels{$a} // $a) cmp CORE::fc($channels{$b} // $b) } keys %channels) {
        my $iter = $users_liststore->append;

        $channels{$channel} // next;

        $users_liststore->set(
                              $iter,
                              0 => $channel,
                              1 => $channels{$channel},
                              2 => 'channel',
                              3 => (
                                    exists($subscribed_channels{$channel})
                                    ? $feed_icon_pixbuf
                                    : $user_icon_pixbuf
                                   ),
                             );
    }
}

sub save_channel {
    my $channel_name = $save_channel_name_entry->get_text;
    my $channel_id   = $save_channel_id_entry->get_text;

    # Validate the channel id
    if (defined($channel_id) and $channel_id =~ /$valid_channel_id_re/) {

        $channel_id = $+{channel_id};

        # Get the channel name when empty
        if (not defined($channel_name) or not $channel_name =~ /\S/) {
            $channel_name = $yv_obj->channel_title_from_id($channel_id) // die "Invalid channel ID: <<$channel_id>>";
        }
    }
    elsif (defined($channel_name) and $channel_name =~ /$valid_channel_id_re/) {

        $channel_name = $+{channel_id};
        $channel_id   = $yv_obj->channel_id_from_username($channel_name);

        if (not defined $channel_id) {
            die "Can't get channel ID from username: <<$channel_name>>";
        }
    }
    elsif (defined($channel_id) and $channel_id =~ /\S/) {
        die "Invalid channel ID: <<$channel_id>>";
    }
    else {
        return;
    }

    save_channel_by_id($channel_id, $channel_name);
}

sub save_channel_by_id {
    my ($channel_id, $channel_name, %args) = @_;

    # Validate the channel ID
    if (not defined($channel_id) or not $channel_id =~ /$valid_channel_id_re/) {
        return;
    }

    if ($channel_id =~ /$valid_channel_id_re/) {
        $channel_id = $+{channel_id};
    }

    if ($args{subscribe} and not exists($subscribed_channels{$channel_id})) {
        say ":: Subscribed channel: $channel_name" if $yv_obj->get_debug;
        $subscribed_channels{$channel_id} = $channel_name;
        write_channels_to_file(\%subscribed_channels, $CONFIG{subscribed_channels_file});
        set_usernames();
    }

    # Channel ID already exists in the list
    if (exists($channels{$channel_id})) {
        return;
    }

    # Get the channel name
    if (not defined($channel_name) or not $channel_name =~ /\S/) {
        $channel_name = $yv_obj->channel_title_from_id($channel_id) // $channel_id;
    }

    # Store it internally
    $channels{$channel_id} = $channel_name;

    # Append it to the list
    my $iter = $users_liststore->append;

    $users_liststore->set(
                          $iter,
                          0 => $channel_id,
                          1 => $channel_name,
                          2 => 'channel',
                          3 => $user_icon_pixbuf,
                         );
}

sub add_user_to_favorites {
    my $selection = $treeview->get_selection() // return;
    my $iter      = $selection->get_selected() // return;

    my $info = $yv_obj->parse_json_string($liststore->get($iter, 8));

    my $channel_id   = $liststore->get($iter, 6);
    my $channel_name = $yv_utils->get_channel_title($info);

    save_channel_by_id($channel_id, $channel_name);
}

sub subscribe_toggle_selected_username {

    my $selection = $users_treeview->get_selection // return;
    my $iter      = $selection->get_selected       // return;

    my $channel_id   = $users_liststore->get($iter, 0);
    my $channel_name = $users_liststore->get($iter, 1);

    if (exists $subscribed_channels{$channel_id}) {
        $unsubbed_channels{$channel_id} = 1;
        delete $subscribed_channels{$channel_id};
        $users_liststore->set($iter, [3], [$user_icon_pixbuf]);
    }
    else {
        $subscribed_channels{$channel_id} = $channel_name;
        delete $unsubbed_channels{$channel_id};
        $users_liststore->set($iter, [3], [$feed_icon_pixbuf]);
    }

    write_channels_to_file(\%subscribed_channels, $CONFIG{subscribed_channels_file});
}

sub remove_selected_username {

    my $selection  = $users_treeview->get_selection // return;
    my $iter       = $selection->get_selected       // return;
    my $channel_id = $users_liststore->get($iter, 0);

    delete $channels{$channel_id};
    delete $subscribed_channels{$channel_id};

    $removed_channels{$channel_id} = 1;
    $users_liststore->remove($iter);
}

sub write_channels_to_file {
    my ($channels, $file) = @_;

    open(my $fh, '>:utf8', $file) or return;

    foreach my $channel (
                         sort { CORE::fc($channels->{$a} // $a) cmp CORE::fc($channels->{$b} // $b) }
                         keys %$channels
      ) {
        if (defined($channels->{$channel})) {
            say $fh "$channel $channels->{$channel}";
        }
        else {
            say $fh "$channel $channel";
        }
    }

    close $fh;
}

sub save_usernames_to_file {

    set_usernames();    # update %channels

    foreach my $id (keys %removed_channels) {
        delete $channels{$id};
        delete $subscribed_channels{$id};
    }

    foreach my $id (keys %unsubbed_channels) {
        delete $subscribed_channels{$id};
    }

    write_channels_to_file(\%channels,            $CONFIG{youtube_users_file});
    write_channels_to_file(\%subscribed_channels, $CONFIG{subscribed_channels_file});
}

# Get playlists from username
sub playlists_from_selected_username {
    my $selection = $users_treeview->get_selection() // return;
    my $iter      = $selection->get_selected()       // return;

    my $type    = $users_liststore->get($iter, 2);
    my $channel = $users_liststore->get($iter, 0);

    playlists($type, $channel);
}

sub videos_from_selected_username {
    my $selection = $users_treeview->get_selection() // return;
    my $iter      = $selection->get_selected()       // return;

    my $type    = $users_liststore->get($iter, 2);
    my $channel = $users_liststore->get($iter, 0);

    uploads($type, $channel);
}

sub videos_from_saved_channel {
    hide_users_list_window();
    videos_from_selected_username();
}

# ----- My panel settings ----- #

sub change_subscription_page {
    my ($value) = @_;
    foreach my $object (qw(subsc_scrollwindow subsc_label)) {
        $value
          ? $gui->get_object($object)->show
          : $gui->get_object($object)->hide;
    }
    return 1;
}

sub subscriptions_button {
    my $type     = $panel_account_type_combobox->get_active_text;
    my $username = $panel_user_entry->get_text;
    subscriptions($type, $username);
}

sub favorites_button {
    my $type     = $panel_account_type_combobox->get_active_text;
    my $username = $panel_user_entry->get_text;
    favorites($type, $username);
}

sub uploads_button {
    my $type     = $panel_account_type_combobox->get_active_text;
    my $username = $panel_user_entry->get_text;
    uploads($type, $username);
}

sub likes_button {
    my $type     = $panel_account_type_combobox->get_active_text;
    my $username = $panel_user_entry->get_text;
    likes($type, $username);
}

sub dislikes_button {
    my $type     = $panel_account_type_combobox->get_active_text;
    my $username = $panel_user_entry->get_text;
    dislikes($type, $username);
}

sub playlists_button {
    my $type     = $panel_account_type_combobox->get_active_text;
    my $username = $panel_user_entry->get_text;
    playlists($type, $username);
}

sub activity_button {
    my $type     = $panel_account_type_combobox->get_active_text;
    my $username = $panel_user_entry->get_text;
    activities($type, $username);
}

sub popular_uploads {
    my ($type, $channel) = @_;

    if ($type =~ /^user/) {
        $channel = $yv_obj->channel_id_from_username($channel) // die "Invalid username <<$channel>>\n";
    }

    my $results = $yv_obj->popular_videos($channel);

    if ($yv_utils->has_entries($results)) {
        $liststore->clear if $CONFIG{clear_search_list};
        display_results($results);
    }
    else {
        die "No popular uploads for channel: <<$channel>>\n";
    }
}

{
    no strict 'refs';
    foreach my $name (qw(favorites uploads likes dislikes playlists subscriptions activities)) {
        *{__PACKAGE__ . '::' . $name} = sub {
            my ($type, $channel) = @_;

            my $method = $name;

            if ($yv_utils->is_channelID($channel)) {
                $method = $name;
            }
            elsif ($type =~ /^user/i and $channel ne 'mine' and $channel =~ /^\S+\z/) {
                $method = $name . '_from_username';
            }
            elsif ($type =~ /^channel/i and $channel ne 'mine' and $channel =~ /^\S+\z/) {
                $method = $name . '_from_username';
            }

            if ($type =~ /^(mine|myself)/i) {
                if ($name eq 'likes') {
                    $method = 'my_likes';
                }

                if ($name eq 'playlists') {
                    $method = 'my_playlists';
                }

                if ($name eq 'activities') {
                    $method = 'my_activities';
                }
            }

            if ($name eq 'dislikes') {
                $method = 'my_dislikes';
            }

            my $request = $yv_obj->$method(
                                           ($type =~ /^(user|channel)/i and $channel =~ /^\S+\z/)
                                           ? $channel
                                           : ()
                                          );

            if ($yv_utils->has_entries($request)) {
                $liststore->clear if $CONFIG{clear_search_list};
                display_results($request);
            }
            else {
                die "No $name results" . ($channel ? " for channel: <<$channel>>\n" : "\n");
            }

            return 1;
        };
    }
}

sub get_selected_entry_code {
    my (%options) = @_;
    my $iter = $treeview->get_selection->get_selected // return;

    if (exists $options{type}) {
        my $type = $liststore->get($iter, 7) // return;
        $type eq $options{type} or return;
    }

    my $code = $liststore->get($iter, 3);
    return wantarray ? ($code, $iter) : $code;
}

sub check_keywords {
    my ($key) = @_;

    if ($key =~ /$get_video_id_re/o) {
        my $info = $yv_obj->video_details($+{video_id});
        if (ref($info) eq 'HASH' and keys %$info) {
            play_video($info) || return;
        }
        else {
            return;
        }
    }
    elsif ($key =~ /$get_playlist_id_re/o) {
        list_playlist($+{playlist_id});
    }
    elsif ($key =~ /$get_channel_playlists_id_re/) {
        list_channel_playlists($+{channel_id});
    }
    elsif ($key =~ /$get_channel_videos_id_re/) {
        list_channel_videos($+{channel_id});
    }
    elsif ($key =~ /$get_username_playlists_re/) {
        list_username_playlists($+{username});
    }
    elsif ($key =~ /$get_username_videos_re/) {
        list_username_videos($+{username});
    }
    else {
        return;
    }

    return 1;
}

sub search {
    my $keywords = $search_entry->get_text();

    return if check_keywords($keywords);

    $liststore->clear if $CONFIG{clear_search_list};

    # Remember the input text when "history" is enabled
    if ($CONFIG{history}) {
        append_to_history($keywords, 1);
    }

    # Set the username
    my $username = $from_author_entry->get_text;

    if ($username =~ /^[\w\-]+\z/) {
        my $id = $username;

        if (not $yv_utils->is_channelID($id)) {
            $id = $yv_obj->channel_id_from_username($id) // undef;
        }

        $yv_obj->set_channelId($id);
    }
    else {
        $yv_obj->set_channelId();
    }

    my $type = $search_for_combobox->get_active_text;
    display_results($yv_obj->search_for($type, $keywords));

    return 1;
}

sub encode_entities {
    my ($text) = @_;

    return q{} if not defined $text;

    $text =~ s/&/&amp;/g;
    $text =~ s/</&lt;/g;
    $text =~ s/>/&gt;/g;

    return $text;
}

sub decode_entities {
    my ($text) = @_;

    return q{} if not defined $text;

    $text =~ s/&amp;/&/g;
    $text =~ s/&lt;/</g;
    $text =~ s/&gt;/>/g;

    return $text;
}

sub get_code {
    my ($code, $iter) = get_selected_entry_code();

    $code // return;

    Glib::Idle->add(
        sub {
            my ($code, $iter) = @{$_[0]};

            my $type = $liststore->get($iter, 7);

            if ($type eq 'playlist') {
                list_playlist($code);
            }
            elsif ($type eq 'channel' or $type eq 'subscription') {
                uploads('channel', $code);
            }
            elsif ($type eq 'next_page' and $code ne '') {

                my $results;
                my $next_page_token = $liststore->get($iter, 5);

                if ($next_page_token =~ /^json (.*)/s) {
                    my $data = $yv_obj->parse_json_string($1);
                    $results = get_results_from_list(%$data);
                }
                else {
                    $results = $yv_obj->next_page($code, $next_page_token);
                }

                if ($yv_utils->has_entries($results)) {
                    my $label = '<big><b>' . ('=' x 20) . '</b></big>';
                    $liststore->set($iter, 0 => $label, 3 => "");
                }
                else {
                    $liststore->remove($iter);
                    die "This is the last page!\n";
                }

                display_results($results);
            }
            elsif ($type eq 'video') {
                $CONFIG{audio_only}
                  ? execute_cli_pipe_viewer("--id=$code")
                  : play_video($yv_obj->parse_json_string($liststore->get($iter, 8)));
            }

            return 0;
        },
        [$code, $iter],
        Glib::G_PRIORITY_LOW
                   );
}

sub make_row_description {
    join(q{ }, split(q{ }, $_[0])) =~ s/(.)\1{3,}/$1/sgr;
}

sub append_next_page {
    my ($url, $token) = @_;

    if (ref($token) ne 'CODE') {
        $url // return;
    }

    $token // return;    # no next page is available

    my $iter = $liststore->append;

    $liststore->set(
                    $iter,
                    0 => "<big><b>LOAD MORE</b></big>",
                    3 => $url,
                    5 => $token,
                    7 => 'next_page',
                   );

    return $iter;
}

sub determine_image_format {
    #
    ## Code from: https://metacpan.org/release/Image-Info/source/lib/Image/Info.pm
    #

    local ($_) = @_;
    return "JPEG" if /^\xFF\xD8/;
    return "PNG"  if /^\x89PNG\x0d\x0a\x1a\x0a/;
    return "GIF"  if /^GIF8[79]a/;
    return "TIFF" if /^MM\x00\x2a/;
    return "TIFF" if /^II\x2a\x00/;
    return "BMP"  if /^BM/;
    return "ICO"  if /^\000\000\001\000/;
    return "PPM"  if /^P[1-6]/;
    return "XPM"  if /(^\/\* XPM \*\/)|(static\s+char\s+\*\w+\[\]\s*=\s*{\s*"\d+)/;
    return "XBM"  if /^(?:\/\*.*\*\/\n)?#define\s/;
    return "SVG"  if /^(<\?xml|[\012\015\t ]*<svg\b)/;
    return "WEBP" if /^RIFF.{4}WEBP/s;
    return undef;
}

sub lwp_get {
    my ($url) = @_;

    state %cache;

    my $data = $cache{$url} // $yv_obj->lwp_get($url, simple => 1);
    $cache{$url} = $data if defined($data);
    return $data;
}

sub get_pixbuf_thumbnail_from_content {
    my ($thumbnail, $xsize, $ysize) = @_;

    $xsize //= 160;
    $ysize //= 90;

    require Digest::MD5;

    my $md5 = Digest::MD5::md5_hex($thumbnail // return $default_thumb);
    my $key = "$md5 $xsize $ysize";

    state %cache;

    if (exists $cache{$key}) {
        return $cache{$key};
    }

    my $pixbuf;
    if (defined $thumbnail) {
        my $type = determine_image_format($thumbnail);

        my $pixbufloader;
        if (defined($type)) {
            $pixbufloader = eval { 'Gtk3::Gdk::PixbufLoader'->new_with_type(lc($type)) };
        }
        if (not defined $pixbufloader) {
            $pixbufloader = 'Gtk3::Gdk::PixbufLoader'->new;
        }

        eval {
            $pixbufloader->set_size($xsize, $ysize);
            ## $pixbufloader->write($thumbnail);      # Gtk3 bug?
            $pixbufloader->write([unpack 'C*', $thumbnail]);
            $pixbuf = $pixbufloader->get_pixbuf;
            $pixbufloader->close;
        };
    }

    if (defined($pixbuf)) {
        $cache{$key} = $pixbuf;
    }

    $pixbuf //= $default_thumb;

    return $pixbuf;
}

sub get_pixbuf_thumbnail_from_url {
    my ($url, $xsize, $ysize) = @_;

    state %cache;

    my $key = "$url $xsize $ysize";

    if (exists $cache{$key}) {
        return $cache{$key};
    }

    my $thumbnail = lwp_get($url);

    if (not defined($thumbnail)) {
        if ($url =~ s{/mq([0-9])\.}{/$1.}) {
            $thumbnail = lwp_get($url);
        }
    }

    my $pixbuf = get_pixbuf_thumbnail_from_content($thumbnail, $xsize, $ysize);

    if (defined($pixbuf)) {
        $cache{$key} = $pixbuf;
    }

    return $pixbuf;
}

sub get_pixbuf_thumbnail_from_entry {
    my ($entry) = @_;

    my $thumbnail_url  = $yv_utils->get_thumbnail_url($entry, $CONFIG{thumbnail_type});
    my $thumbnail_data = ($entry->{_thumbnail_data} ||= lwp_get($thumbnail_url));

    # Don't cache thumbnails that failed to be retrieved.
    if (not $entry->{_thumbnail_data}) {
        delete $entry->{_thumbnail_data};
    }

    my $square_format = $yv_utils->is_channel($entry) || $yv_utils->is_subscription($entry);
    my $pixbuf        = get_pixbuf_thumbnail_from_content($thumbnail_data, ($square_format ? (160, 160) : ()));

    return $pixbuf;
}

sub get_results_from_list {
    my (%args) = @_;

    $args{entries} //= [];
    $args{page}    //= $yv_obj->get_page;

    my @results = @{$args{entries}};

    my $maxResults   = $yv_obj->get_maxResults;
    my $totalResults = scalar(@results);

    if ($args{page} >= 1 and scalar(@results) >= $maxResults) {
        @results = grep { defined } @results[($args{page} - 1) * $maxResults .. $args{page} * $maxResults - 1];
    }

    my %results;
    my @entries;

    foreach my $entry (@results) {
        if (defined($args{callback})) {
            push @entries, $args{callback}($entry);
        }
        else {
            push @entries, $entry;
        }
    }

    $results{entries} = \@entries;

    #$results{pageInfo} = {resultsPerPage => scalar(@entries), totalResults => $totalResults};

    if ($args{page} * $maxResults < $totalResults) {
        $results{continuation} = 'json '
          . $yv_obj->make_json_string(
                                      {
                                       %args, page => $args{page} + 1,
                                      }
                                     );
    }

    scalar {results => \%results, url => 'file'};
}

sub videos_from_data_file {
    my ($file, %args) = @_;

    my $videos = eval { Storable::retrieve($file) } // [];

    if ($args{reverse}) {
        $videos = [reverse @$videos];
    }

    foreach my $entry (@$videos) {
        if (ref($entry->{timestamp} // '') eq 'Time::Piece') {
            $entry->{timestamp} = [@{$entry->{timestamp}}];
        }
    }

    get_results_from_list(entries => $videos);
}

sub get_subscription_video_results {

    # Reuse the subscription file if it's less than 10 minutes old
    if (-f $subscription_videos_data_file and (-M _) < (1 / 6) / 24 and (-M _) < (-M $CONFIG{subscribed_channels_file})) {
        return videos_from_data_file($subscription_videos_data_file);
    }

    my @channels = $yv_utils->read_channels_from_file($CONFIG{subscribed_channels_file});

    if (not @channels) {
        warn "\n[!] No subscribed channels...\n";
        return get_results_from_list(entries => []);
    }

    my %subscriptions;

    require Time::Piece;
    my $time = Time::Piece->new();

    my @items;
    foreach my $i (0 .. $#channels) {

        local $| = 1;
        printf("[%d/%d] Retrieving info for $channels[$i][1]...\n", $i + 1, $#channels + 1);

        my $id      = $channels[$i][0]      // next;
        my $uploads = $yv_obj->uploads($id) // next;

        my $videos = $uploads->{results} // [];

        if (ref($videos) eq 'HASH' and exists $videos->{videos}) {
            $videos = $videos->{videos};
        }

        if (ref($videos) eq 'HASH' and exists $videos->{entries}) {
            $videos = $videos->{entries};
        }

        if (ref($videos) ne 'ARRAY') {
            next;
        }

        $subscriptions{$id} = 1;
        $subscriptions{lc($id)} = 1;

        foreach my $video (@$videos) {
            $video->{timestamp} = [@$time];
        }

        push @items, @$videos;
    }

    my $subscriptions_data = [];

    if (-f $subscription_videos_data_file) {
        $subscriptions_data = eval { Storable::retrieve($subscription_videos_data_file) } // [];
    }

    unshift(@$subscriptions_data, @items);

    # Remove duplicates
    @$subscriptions_data = do {
        my %seen;
        grep { !$seen{$yv_utils->get_video_id($_)}++ } @$subscriptions_data;
    };

    # Remove videos from unsubscribed channels
    @$subscriptions_data = grep {
             exists($subscriptions{$yv_utils->get_channel_id($_)})
          or exists($subscriptions{lc($yv_utils->get_channel_title($_) // '')})
    } @$subscriptions_data;

    # Order videos by newest first
    @$subscriptions_data =
      map  { $_->[0] }
      sort { $b->[1] <=> $a->[1] }
      map  { [$_, $yv_utils->get_publication_time($_)] } @$subscriptions_data;

    # Remove results from the end when the list becomes too large
    my $subscriptions_limit = $CONFIG{subscriptions_limit} // 1e4;
    if ($subscriptions_limit > 0 and scalar(@$subscriptions_data) > $subscriptions_limit) {
        $#$subscriptions_data = $subscriptions_limit;
    }

    foreach my $entry (@$subscriptions_data) {
        if (ref($entry->{timestamp} // '') eq 'Time::Piece') {
            $entry->{timestamp} = [@{$entry->{timestamp}}];
        }
    }

    if (@$subscriptions_data) {
        Storable::store($subscriptions_data, $subscription_videos_data_file);
    }

    get_results_from_list(entries => $subscriptions_data);
}

sub get_watched_video_results {
    videos_from_data_file($watch_history_data_file);
}

sub display_watched_videos {
    $liststore->clear if $CONFIG{clear_search_list};
    display_results(get_watched_video_results());
}

sub display_subscription_videos {
    $liststore->clear if $CONFIG{clear_search_list};
    display_results(get_subscription_video_results());
}

sub display_results {
    my ($results, $from_history) = @_;

    my $url = $results->{url};

    #my $info  = $results->{results} // {};
    my $items = $results->{results} // [];

    if (ref($items) eq 'HASH') {

        if (exists $items->{videos}) {
            $items = $items->{videos};
        }
        elsif (exists $items->{playlists}) {
            $items = $items->{playlists};
        }
        elsif (exists $items->{channels}) {
            $items = $items->{channels};
        }
        elsif (exists $items->{entries}) {
            $items = $items->{entries};
        }
        else {
            warn "No results...\n";
        }
    }

    if (ref($items) ne 'ARRAY') {
        die "Probably the selected invidious instance is down.\n"
          . "\nTry changing the `api_host` in configuration file:\n\n"
          . qq{\tapi_host => "auto",\n}
          . qq{\nSee also: https://git.sr.ht/~heckyel/fair-viewer#invidious-instances\n};
    }

    if (not $yv_utils->has_entries($results)) {
        die "No results...\n";
    }

    if (@$items) {
        add_results_to_history($results) if not $from_history;
    }

    #~ if (not $from_history) {

    #~ foreach my $entry (@$items) {
    #~ if ($yv_utils->is_activity($entry)) {
    #~ my $type = $entry->{snippet}{type};

    #~ if ($type eq 'upload') {
    #~ $entry->{kind} = 'youtube#video';
    #~ $entry->{id}   = $entry->{contentDetails}{upload}{videoId};
    #~ }

    #~ if ($type eq 'playlistItem') {
    #~ $entry->{kind} = 'youtube#video';
    #~ $entry->{id}   = $entry->{contentDetails}{playlistItem}{resourceId}{videoId};
    #~ }

    #~ if ($type eq 'subscription') {
    #~ $entry->{kind}               = 'youtube#channel';
    #~ $entry->{snippet}{title}     = $entry->{snippet}{channelTitle};
    #~ $entry->{snippet}{channelId} = $entry->{contentDetails}{subscription}{resourceId}{channelId};
    #~ }

    #~ if ($type eq 'bulletin' and $entry->{contentDetails}{bulletin}{resourceId}{kind} eq 'youtube#video') {
    #~ $entry->{kind} = 'youtube#video';
    #~ $entry->{id}   = $entry->{contentDetails}{bulletin}{resourceId}{videoId};
    #~ }
    #~ }
    #~ }

    #~ my @video_ids;
    #~ my @playlist_ids;

    #~ foreach my $i (0 .. $#{$items}) {
    #~ my $item = $items->[$i];

    #~ if ($yv_utils->is_playlist($item)) {
    #~ push @playlist_ids, $yv_utils->get_playlist_id($item);
    #~ }
    #~ elsif ($yv_utils->is_video($item)) {
    #~ push @video_ids, $yv_utils->get_video_id($item);
    #~ }
    #~ }

    #~ my %id_lookup;

    #~ if (@video_ids) {
    #~ my $content_details = $yv_obj->video_details(join(',', @video_ids), VIDEO_PART);
    #~ my $video_details   = $content_details->{results}{items};

    #~ foreach my $i (0 .. $#video_ids) {
    #~ $id_lookup{$video_ids[$i]} = $video_details->[$i];
    #~ }
    #~ }

    #~ if (@playlist_ids) {
    #~ my $content_details  = $yv_obj->playlist_from_id(join(',', @playlist_ids), 'contentDetails');
    #~ my $playlist_details = $content_details->{results}{items};

    #~ foreach my $i (0 .. $#playlist_ids) {
    #~ $id_lookup{$playlist_ids[$i]} = $playlist_details->[$i];
    #~ }
    #~ }

    #~ $info->{__extra_info__} = \%id_lookup;
    #~ }

    foreach my $i (0 .. $#{$items}) {
        my $item = $items->[$i];

        if ($yv_utils->is_playlist($item)) {

            #~ my $playlist_id = $yv_utils->get_playlist_id($item) || next;

            #~ if (exists($info->{__extra_info__}{$playlist_id})) {
            #~ @{$item}{qw(contentDetails)} =
            #~ @{$info->{__extra_info__}{$playlist_id}}{qw(contentDetails)};
            #~ }

            add_playlist_entry($item);
        }
        elsif ($yv_utils->is_channel($item)) {
            add_channel_entry($item);
        }
        elsif ($yv_utils->is_subscription($item)) {
            add_subscription_entry($item);
        }
        elsif ($yv_utils->is_video($item)) {

            #~ my $video_id = $yv_utils->get_video_id($item) || next;

            #~ if (exists($info->{__extra_info__}{$video_id})) {
            #~ @{$item}{qw(id contentDetails statistics snippet)} =
            #~ @{$info->{__extra_info__}{$video_id}}{qw(id contentDetails statistics snippet)};
            #~ }

            # Filter out private or deleted videos
            #$yv_utils->get_video_id($item) || next;

            # Filter out videos with time '00:00'
            #$yv_utils->get_time($item) eq '00:00' and next;

            # Mark as video
            #$item->{__is_video__} = 1;

            # Store the video title to history (when `save_titles_to_history` is true)
            if ($CONFIG{save_titles_to_history}) {
                append_to_history($yv_utils->get_title($item), 0);
            }

            add_video_entry($item);
        }
    }

    if (ref($results->{results}) eq 'HASH' and exists($results->{results}{continuation})) {
        if (defined $results->{results}{continuation}) {
            append_next_page($url, $results->{results}{continuation});
        }
    }
    else {
        append_next_page($url);
    }
}

sub set_entry_tooltip {
    my ($iter, $title, $description) = @_;

    $CONFIG{tooltips} || return 1;

    if ($CONFIG{tooltip_max_len} > 0 and length($description) > $CONFIG{tooltip_max_len}) {
        $description = substr($description, 0, $CONFIG{tooltip_max_len}) . '...';
    }

    $description =~ s/(?:\R\s*\R)+/\n\n/g;    # replace 2+ consecutive newlines with "\n\n"

    $liststore->set($iter, [9], ["<b>" . encode_entities($title) . "</b>" . "\n\n" . encode_entities($description)]);
}

sub set_thumbnail {
    my ($entry, $liststore, $iter) = @_;

    $liststore->set($iter, [1], [$default_thumb]);

    Glib::Idle->add(
        sub {
            my ($entry, $liststore, $iter) = @{$_[0]};
            my $pixbuf = get_pixbuf_thumbnail_from_entry($entry);
            $liststore->set($iter, [1], [$pixbuf]);
            return 0;
        },
        [$entry, $liststore, $iter],
        Glib::G_PRIORITY_LOW
                   );
}

sub add_subscription_entry {
    my ($subscription) = @_;

    my $iter            = $liststore->append;
    my $title           = $yv_utils->get_title($subscription);
    my $channel_id      = $yv_utils->get_channel_id($subscription);
    my $description     = $yv_utils->get_description($subscription);
    my $row_description = make_row_description($description);

    set_entry_tooltip($iter, $title, $description);

    my $title_label =
        '<big><b>'
      . encode_entities($title)
      . "</b></big>\n\n"
      . "$symbols{author}\t "
      . encode_entities($channel_id) . "\n"
      . "$symbols{published}\t "
      . ($yv_utils->get_publication_date($subscription) // 'unknown')
      . "\n\n<i>"
      . encode_entities($row_description) . '</i>';

    my $type_label = "$symbols{type}\t " . 'Subscription' . "\n";

    $liststore->set(
                    $iter,
                    0 => $title_label,
                    2 => $type_label,
                    3 => $channel_id,
                    4 => encode_entities($description),
                    6 => $channel_id,
                    7 => 'subscription',
                    8 => $yv_obj->make_json_string($subscription),
                   );

    if ($CONFIG{show_thumbs}) {
        set_thumbnail($subscription, $liststore, $iter);
    }
}

sub reflow_text {
    my ($text) = @_;
    $text =~ s/^/&#x200e;/gmr;
}

sub add_video_entry {
    my ($video) = @_;

    my $iter            = $liststore->append;
    my $title           = $yv_utils->get_title($video);
    my $video_id        = $yv_utils->get_video_id($video);
    my $channel_id      = $yv_utils->get_channel_id($video);
    my $description     = $yv_utils->get_description($video);
    my $row_description = make_row_description($description);

    set_entry_tooltip($iter, $title, $description);

    my $title_label = reflow_text(
        sprintf(
            "<big><b>%s</b></big>

$symbols{author}\t %s
$symbols{published}\t %s

<i>%s</i>",

            encode_entities($title),
            encode_entities($yv_utils->get_channel_title($video)),
            ($yv_utils->get_publication_date($video) // 'unknown'),
            encode_entities($row_description),
               )
    );

    my $info_label = reflow_text(
        sprintf(
            "$symbols{play}\t %s
$symbols{views}\t %s",
            $yv_utils->get_time($video),
            $yv_utils->set_thousands($yv_utils->get_views($video)),
               )
    );

    $liststore->set(
                    $iter,
                    0 => $title_label,
                    2 => $info_label,
                    3 => $video_id,
                    4 => encode_entities($description),
                    6 => $channel_id,
                    7 => 'video',
                    8 => $yv_obj->make_json_string($video),
                   );

    if ($CONFIG{show_thumbs}) {
        set_thumbnail($video, $liststore, $iter);
    }
}

sub add_channel_entry {
    my ($channel) = @_;

    my $iter            = $liststore->append;
    my $title           = $yv_utils->get_channel_title($channel);
    my $channel_id      = $yv_utils->get_channel_id($channel);
    my $description     = $yv_utils->get_description($channel);
    my $row_description = make_row_description($description);

    set_entry_tooltip($iter, $title, $description);

    my $title_label = reflow_text(
        sprintf(
            "<big><b>%s</b></big>

$symbols{author}\t %s
$symbols{author_id}\t %s

<i>%s</i>",
            encode_entities($title),
            encode_entities($title),
            encode_entities($channel_id),
            encode_entities($row_description),
               )
    );

    my $type_label = reflow_text(
        sprintf(
            "$symbols{type}\t Channel
$symbols{video}\t %s videos
$symbols{subs}\t %s subs",

            $yv_utils->set_thousands($yv_utils->get_video_count($channel)),
            $yv_utils->short_human_number($yv_utils->get_subscriber_count($channel)),
               )
    );

    $liststore->set(
                    $iter,
                    0 => $title_label,
                    2 => $type_label,
                    3 => $channel_id,
                    4 => encode_entities($description),
                    6 => $channel_id,
                    7 => 'channel',
                    8 => $yv_obj->make_json_string($channel),
                   );

    if ($CONFIG{show_thumbs}) {
        set_thumbnail($channel, $liststore, $iter);
    }
}

sub add_playlist_entry {
    my ($playlist) = @_;

    my $iter            = $liststore->append;
    my $title           = $yv_utils->get_title($playlist);
    my $channel_id      = $yv_utils->get_channel_id($playlist);
    my $channel_title   = $yv_utils->get_channel_title($playlist);
    my $description     = $yv_utils->get_description($playlist);
    my $playlist_id     = $yv_utils->get_playlist_id($playlist);
    my $row_description = make_row_description($description);

    set_entry_tooltip($iter, $title, $description);

    my $title_label = reflow_text(
        sprintf(
            "<big><b>%s</b></big>

$symbols{author}\t %s
$symbols{play}\t %s

<i>%s</i>",

            encode_entities($title),
            encode_entities($channel_title),
            encode_entities($playlist_id),
            encode_entities($row_description),
               )
    );

    my $type_label = reflow_text(
        sprintf(
            "$symbols{type}\t Playlist
$symbols{video}\t %s videos",
            $yv_utils->set_thousands($yv_utils->get_playlist_video_count($playlist) // 0)
               )
    );

    $liststore->set(
                    $iter,
                    0 => $title_label,
                    2 => $type_label,
                    3 => $playlist_id,
                    4 => encode_entities($description),
                    6 => $channel_id,
                    7 => 'playlist',
                    8 => $yv_obj->make_json_string($playlist),
                   );

    if ($CONFIG{show_thumbs}) {
        set_thumbnail($playlist, $liststore, $iter);
    }
}

sub list_playlist {
    my ($playlist_id) = @_;

    my $results = $yv_obj->videos_from_playlist_id($playlist_id);

    if ($yv_utils->has_entries($results)) {
        $liststore->clear if $CONFIG{clear_search_list};
        display_results($results);
        return 1;
    }
    else {
        die "[!] Inexistent playlist...\n";
    }
    return;
}

sub list_channel_videos {
    my ($channel_id) = @_;

    my $results = $yv_obj->uploads($channel_id);

    if ($yv_utils->has_entries($results)) {
        $liststore->clear if $CONFIG{clear_search_list};
        display_results($results);
        return 1;
    }
    else {
        die "[!] No videos for channel ID: $channel_id\n";
    }
    return;
}

sub list_username_videos {
    my ($username) = @_;

    my $results = $yv_obj->uploads_from_username($username);

    if ($yv_utils->has_entries($results)) {
        $liststore->clear if $CONFIG{clear_search_list};
        display_results($results);
        return 1;
    }
    else {
        die "[!] No videos for user: $username\n";
    }
    return;
}

sub list_channel_playlists {
    my ($channel_id) = @_;

    my $results = $yv_obj->playlists($channel_id);

    if ($yv_utils->has_entries($results)) {
        $liststore->clear if $CONFIG{clear_search_list};
        display_results($results);
        return 1;
    }
    else {
        die "[!] No playlists for channel ID: $channel_id\n";
    }
    return;
}

sub list_username_playlists {
    my ($username) = @_;

    my $results = $yv_obj->playlists_from_username($username);

    if ($yv_utils->has_entries($results)) {
        $liststore->clear if $CONFIG{clear_search_list};
        display_results($results);
        return 1;
    }
    else {
        die "[!] No playlists for user: $username\n";
    }
    return;
}

sub favorites_from_text_entry {
    my ($text_entry) = @_;
    favorites($channel_type_combobox->get_active_text, $text_entry->get_text);
}

sub uploads_from_text_entry {
    my ($text_entry) = @_;
    uploads($channel_type_combobox->get_active_text, $text_entry->get_text);
}

sub playlists_from_text_entry {
    my ($text_entry) = @_;
    playlists($channel_type_combobox->get_active_text, $text_entry->get_text);
}

sub likes_from_text_entry {
    my ($text_entry) = @_;
    likes($channel_type_combobox->get_active_text, $text_entry->get_text);
}

sub subscriptions_from_text_entry {
    my ($text_entry) = @_;
    subscriptions($channel_type_combobox->get_active_text, $text_entry->get_text);
}

sub strip_spaces {
    my ($text) = @_;
    $text =~ s/^\s+//;
    return unpack 'A*', $text;
}

sub get_streaming_url {
    my ($video_id) = @_;

    my ($urls, $captions, $info) = $yv_obj->get_streaming_urls($video_id);

    if (not defined $urls) {
        return scalar {};
    }

    # Download the closed-captions
    my $srt_file;
    if (ref($captions) eq 'ARRAY' and @$captions and $CONFIG{get_captions}) {
        require WWW::FairViewer::GetCaption;
        my $yv_cap = WWW::FairViewer::GetCaption->new(
                                                      auto_captions => $CONFIG{auto_captions},
                                                      captions_dir  => $CONFIG{cache_dir},
                                                      captions      => $captions,
                                                      languages     => $CONFIG{srt_languages},
                                                      yv_obj        => $yv_obj,
                                                     );
        $srt_file = $yv_cap->save_caption($video_id);
    }

    require WWW::FairViewer::Itags;
    state $yv_itags = WWW::FairViewer::Itags->new();

    my ($streaming, $resolution) = $yv_itags->find_streaming_url(
        urls       => $urls,
        resolution => $CONFIG{resolution},

        hfr        => $CONFIG{hfr},
        ignore_av1 => $CONFIG{ignore_av1},

        split      => $CONFIG{split_videos},
        prefer_m4a => $CONFIG{prefer_m4a},
        dash       => $CONFIG{dash},

        ignored_projections => $CONFIG{ignored_projections},
                                                                );

    return {
            streaming  => $streaming,
            srt_file   => $srt_file,
            info       => $info,
            resolution => $resolution,
           };
}

sub get_quotewords {
    require Text::ParseWords;
    return Text::ParseWords::quotewords(@_);
}

#---------------------- PLAY AN YOUTUBE VIDEO ----------------------#
sub get_player_command {
    my ($streaming, $video) = @_;

    my %MPLAYER;

    $MPLAYER{fullscreen} = $CONFIG{fullscreen} ? $CONFIG{video_players}{$CONFIG{video_player_selected}}{fs} : q{};
    $MPLAYER{arguments}  = $CONFIG{video_players}{$CONFIG{video_player_selected}}{arg} // q{};

    my $cmd = join(
        q{ },
        (
            # Video player
            $CONFIG{video_players}{$CONFIG{video_player_selected}}{cmd},

            (    # Audio file (https://)
               ref($streaming->{streaming}{__AUDIO__}) eq 'HASH'
                 && exists($CONFIG{video_players}{$CONFIG{video_player_selected}}{audio})
               ? $CONFIG{video_players}{$CONFIG{video_player_selected}}{audio}
               : ()
            ),

            (    # Caption file (.srt)
               defined($streaming->{srt_file})
                 && exists($CONFIG{video_players}{$CONFIG{video_player_selected}}{srt})
               ? $CONFIG{video_players}{$CONFIG{video_player_selected}}{srt}
               : ()
            ),

            # Rest of the arguments
            grep({ defined($_) and /\S/ } values %MPLAYER)
        )
    );

    my $has_video = $cmd =~ /(?:^|\s)\*(?:VIDEO|URL)\*(?:\s|\z)/;

    $cmd = $yv_utils->format_text(
                                  streaming => $streaming,
                                  info      => $video,
                                  text      => $cmd,
                                  escape    => 1,
                                 );

    if ($streaming->{streaming}{url} =~ m{^https://www\.youtube\.com/watch\?v=}) {
        $cmd =~ s{\s*--no-ytdl\b}{ }g;
    }

    $has_video ? $cmd : join(' ', $cmd, quotemeta($streaming->{streaming}{url}));
}

sub prepend_video_data_to_file {
    my ($video_data, $file) = @_;

    my $videos = eval { Storable::retrieve($file) } // [];

    if (ref($video_data) ne 'HASH') {
        return;
    }

    $yv_utils->get_video_id($video_data) // return;

    unshift(@$videos, $video_data);

    my %seen;
    @$videos = grep { !$seen{$yv_utils->get_video_id($_)}++ } @$videos;

    Storable::store($videos, $file);
    return 1;
}

sub save_watched_video {
    my ($video_id, $video_data) = @_;

    # Store the video title to history (when `save_watched_to_history` is true)
    if ($CONFIG{save_watched_to_history}) {
        append_to_history($yv_utils->get_title($video_data), 0);
    }

    if ($CONFIG{watch_history}) {

        say ":: Saving video <<$video_id>> to watch history..." if ($yv_obj->get_debug);

        if (not exists($WATCHED_VIDEOS{$video_id})) {

            $WATCHED_VIDEOS{$video_id} = 1;

            open my $fh, '>>', $CONFIG{watched_file} or return;
            say {$fh} $video_id;
            close $fh;
        }

        prepend_video_data_to_file($video_data, $watch_history_data_file);
    }

    $WATCHED_VIDEOS{$video_id} = 1;
    return 1;
}

sub play_video {
    my ($video) = @_;

    my $video_id  = $yv_utils->get_video_id($video);
    my $streaming = get_streaming_url($video_id);

    if (ref($streaming->{streaming}) ne 'HASH') {
        die "[!] Can't play this video: no streaming URL has been found!\n";
    }

    if (    not defined($streaming->{streaming}{url})
        and defined($streaming->{info}{status})
        and $streaming->{info}{status} =~ /(?:error|fail)/i) {
        die "[!] Error on: " . sprintf($CONFIG{youtube_video_url}, $video_id) . "\n",
          "[*] Reason: " . $streaming->{info}{reason} =~ tr/+/ /r . "\n";
    }

    my $command = get_player_command($streaming, $video);

    if ($yv_obj->get_debug) {
        say "-> Resolution: $streaming->{resolution}";
        say "-> Video itag: $streaming->{streaming}{itag}";
        say "-> Audio itag: $streaming->{streaming}{__AUDIO__}{itag}" if exists $streaming->{streaming}{__AUDIO__};
        say "-> Video type: $streaming->{streaming}{type}";
        say "-> Audio type: $streaming->{streaming}{__AUDIO__}{type}" if exists $streaming->{streaming}{__AUDIO__};
    }

    my $code = execute_external_program($command);

    if ($code == 0) {
        save_watched_video($video_id, $video);
    }
    else {
        warn "[!] Can't play this video -- player exited with code: $code\n";
    }

    return 1;
}

sub list_category {

    my $iter   = $cat_treeview->get_selection->get_selected;
    my $cat_id = $cats_liststore->get($iter, 1);
    my $type   = $cats_liststore->get($iter, 3);

    my $videos = $yv_obj->trending_videos_from_category($cat_id);

    if ($yv_utils->has_entries($videos)) {
        $liststore->clear if $CONFIG{clear_search_list};
        display_results($videos);
    }
    else {
        die "No video found for categoryID: <$cat_id>\n";
    }
}

sub list_local_playlist {
    my $iter = $playlists_treeview->get_selection->get_selected;

    my $reverse_playlist = $gui->get_object('reverse_playlist')->get_active;
    my $playlist_file    = $playlists_liststore->get($iter, 3);

    $liststore->clear if $CONFIG{clear_search_list};

    my $results = videos_from_data_file($playlist_file, reverse => $reverse_playlist);
    display_results($results);
}

sub clear_text {
    my ($entry) = @_;

    if ($entry->get_text() =~ /\.\.\.\z/ or $CONFIG{clear_text_entries_on_click}) {
        $entry->set_text('');
    }

    return 0;
}

sub run_cli_pipe_viewer {
    execute_cli_pipe_viewer('--interactive');
}

sub get_options_as_arguments {
    my @args;
    my %options = (
                   'no-interactive' => q{},
                   'resolution'     => $CONFIG{resolution},
                   'download-dir'   => quotemeta(rel2abs($CONFIG{downloads_dir})),
                   'fullscreen'     => $CONFIG{fullscreen} ? q{}   : undef,
                   'no-dash'        => $CONFIG{dash}       ? undef : q{},
                   'no-video'       => $CONFIG{audio_only} ? q{}   : undef,
                  );

    while (my ($argv, $value) = each %options) {
        push(
            @args,
            do {
                $value              ? '--' . $argv . '=' . $value
                  : defined($value) ? '--' . $argv
                  :                   next;
            }
        );
    }
    return @args;
}

sub execute_external_program {
    my ($cmd) = @_;

    if ($CONFIG{prefer_fork} and defined(my $pid = fork())) {
        if ($pid == 0) {
            say "** Forking process: $cmd" if $yv_obj->get_debug;
            $yv_obj->proxy_exec($cmd);
        }
    }
    else {
        say "** Backgrounding process: $cmd" if $yv_obj->get_debug;
        $yv_obj->proxy_system($cmd . ' &');
    }
}

sub make_youtube_url {
    my ($type, $code) = @_;

    my $format = (
                    ($type eq 'subscription' || $type eq 'channel') ? $CONFIG{youtube_channel_url}
                  : $type eq 'video'                                ? $CONFIG{youtube_video_url}
                  : $type eq 'playlist'                             ? $CONFIG{youtube_playlist_url}
                  :                                                   ()
                 );

    if (defined $format) {
        return sprintf($format, $code);
    }

    return "https://www.youtube.com";
}

sub open_external_url {
    my ($url) = @_;

    my $exit_code =
      execute_external_program(join(q{ }, $CONFIG{web_browser} // $ENV{WEBBROWSER} // 'xdg-open', quotemeta($url)));

    if ($exit_code != 0) {
        warn "Can't open URL <<$url>> -- exit code: $exit_code\n";
    }

    return 1;
}

sub enqueue_video {
    my $video_id = get_selected_entry_code(type => 'video') // return;
    print "[*] Added: <$video_id>\n" if $yv_obj->get_debug;
    push @VIDEO_QUEUE, $video_id;
    return 1;
}

sub play_enqueued_videos {
    if (@VIDEO_QUEUE) {
        execute_cli_pipe_viewer('--video-ids=' . join(q{,}, splice @VIDEO_QUEUE));
    }
    return 1;
}

sub play_selected_video_with_cli_pipe_viewer {
    my ($code, $iter) = get_selected_entry_code();
    $code // return;

    my $type = $liststore->get($iter, 7);

    if ($type eq 'video') {
        execute_cli_pipe_viewer("--video-id=$code");
    }
    elsif ($type eq 'playlist') {
        execute_cli_pipe_viewer("--pp=$code");
    }
    else {
        warn "Can't play $type: $code\n";
    }

    return 1;
}

sub execute_cli_pipe_viewer {
    my @arguments = @_;

    my $command = join(
                       q{ },
                       $CONFIG{terminal},
                       sprintf(
                               $CONFIG{terminal_exec},
                               join(q{ },
                                    $CONFIG{pipe_viewer}, get_options_as_arguments(),
                                    @arguments,           @{$CONFIG{pipe_viewer_args}}),
                              )
                      );
    my $code = execute_external_program($command);

    say $command if $yv_obj->get_debug;

    warn "fair-viewer - exit code: $code\n" if $code != 0;
    return 1;
}

sub download_video {
    my $code = get_selected_entry_code(type => 'video') // return;
    execute_cli_pipe_viewer("--video-id=$code", '--download');
    return 1;
}

sub comments_row_activated {

    my $iter = $feeds_treeview->get_selection->get_selected() or return;
    my $url  = $feeds_liststore->get($iter, 1);

    if (defined($url) and $url =~ m{^https?://}) {    # load more comments

        my $token = $feeds_liststore->get($iter, 2);
        $feeds_liststore->remove($iter);
        my $results = $yv_obj->next_page_with_token($url, $token);

        if ($yv_utils->has_entries($results)) {
            display_comments($results);
        }
        else {
            die "This is the last page of comments.\n";
        }

        return 1;
    }

    my $video_id   = $feeds_liststore->get($iter, 3);
    my $comment_id = $feeds_liststore->get($iter, 4);

    my $comment_url = sprintf("https://www.youtube.com/watch?v=%s&lc=%s", $video_id, $comment_id,);

    open_external_url($comment_url);

    return 1;
}

sub show_user_favorite_videos {
    my $username = get_channel_id_for_selected_video() // return;
    favorites('channel', $username);
}

sub get_channel_id_for_selected_video {
    my $selection = $treeview->get_selection() // return;
    my $iter      = $selection->get_selected() // return;
    $liststore->get($iter, 6);
}

sub show_related_videos {
    my $video_id = get_selected_entry_code(type => 'video') // return;

    my $results = $yv_obj->related_to_videoID($video_id);
    if ($yv_utils->has_entries($results)) {
        $liststore->clear if $CONFIG{clear_search_list};
        display_results($results);
    }
    else {
        die "No related video for videoID: <$video_id>\n";
    }
}

sub send_comment_to_video {
    my $videoID = get_selected_entry_code(type => 'video') // return;
    my $comment = get_text($gui->get_object('comment_textview'));

    $feeds_statusbar->push(0,
                           length($comment) && $yv_obj->comment_to_video_id($comment, $videoID)
                           ? 'Video comment has been posted!'
                           : 'Error!');
}

sub wrap_text {
    my (%args) = @_;

    require Text::Wrap;
    local $Text::Wrap::columns = $CONFIG{comments_width};

    my $text = "@{$args{text}}";
    $text =~ tr{\r}{}d;

    eval { Text::Wrap::wrap($args{i_tab}, $args{s_tab}, $text) } // $text;
}

sub display_comments {
    my ($results) = @_;

    return 1 if ref($results) ne 'HASH';

    my $url          = $results->{url};
    my $video_id     = $results->{results}{videoId};
    my $comments     = $results->{results}{comments} // [];
    my $continuation = $results->{results}{continuation};

    foreach my $comment (@{$comments}) {

        #my $comment_age = $yv_utils->date_to_age($snippet->{publishedAt});
        my $comment_id  = $yv_utils->get_comment_id($comment);
        my $comment_age = $yv_utils->get_publication_age_approx($comment);

        my $comment_text = reflow_text(
                                      sprintf(
                                              "<big><b>%s</b> (%s) commented:</big>\n%s",
                                              encode_entities($yv_utils->get_author($comment)),
                                              (
                                               $comment_age =~ /sec|min|hour|day/
                                               ? "$comment_age ago"
                                               : ($yv_utils->get_publication_date($comment) // 'unknown')
                                              ),
                                              encode_entities(
                                                  wrap_text(
                                                      i_tab => "\t",
                                                      s_tab => "\t",
                                                      text => [$yv_utils->get_comment_content($comment) // 'Empty comment...'],
                                                  )
                                              ),
                                             )
                                      );

        my $iter = $feeds_liststore->append;
        $feeds_liststore->set(
                              $iter,
                              0 => $comment_text,
                              3 => $video_id,
                              4 => $comment_id,
                             );

        #~ if (exists $comment->{replies}) {
        #~ foreach my $reply (reverse @{$comment->{replies}{comments}}) {
        #~ my $reply_age = $yv_utils->date_to_age($reply->{snippet}{publishedAt});
        #~ my $reply_text = reflow_text(
        #~ "\t<big><b>"
        #~ . encode_entities($reply->{snippet}{authorDisplayName})
        #~ . "</b> ("
        #~ . (
        #~ $reply_age =~ /sec|min|hour|day/
        #~ ? "$reply_age ago"
        #~ : $yv_utils->format_date($reply->{snippet}{publishedAt})
        #~ )
        #~ . ") replied:</big>\n"
        #~ . encode_entities(
        #~ wrap_text(
        #~ i_tab => "\t\t",
        #~ s_tab => "\t\t",
        #~ text => [$reply->{snippet}{textDisplay} // 'Empty comment...']
        #~ )
        #~ )
        #~ );

        #~ my $iter = $feeds_liststore->append;
        #~ $feeds_liststore->set(
        #~ $iter,
        #~ 0 => $reply_text,
        #~ 3 => $reply->{snippet}{videoId},
        #~ 4 => $reply->{id},
        #~ );
        #~ }
        #~ }
    }

    if (defined $continuation) {
        my $iter = $feeds_liststore->append;
        $feeds_liststore->set(
                              $iter,
                              0 => "<big><b>LOAD MORE</b></big>",
                              1 => $url,
                              2 => $continuation,
                             );
    }

    return 1;
}

sub save_session {
    $CONFIG{remember_session} || return;

    my $curr        = $ResultsHistory{current};
    my $curr_result = $ResultsHistory{results}[$curr] // return;

    my @results = @{$ResultsHistory{results}};

    require List::Util;

    my $max   = $CONFIG{remember_session_depth};
    my @left  = @results[List::Util::max(0, $curr - $max) .. $curr - 1];
    my @right = @results[$curr + 1 .. List::Util::min($#results, $curr + $max)];

    if ($yv_obj->get_debug) {
        say "Session total: ", scalar(@results);
        say "Session left : ", scalar(@left);
        say "Session right: ", scalar(@right);
    }

    $ResultsHistory{current} = $#left + 1;
    $ResultsHistory{results} = [@left, $curr_result, @right];

    Storable::store(
                    {
                     keyword => $search_entry->get_text,
                     history => \%ResultsHistory,
                    },
                    $session_file
                   );
}

sub add_results_to_history {
    my ($results) = @_;
    my $results_copy = $results;
    $ResultsHistory{current}++;
    splice @{$ResultsHistory{results}}, $ResultsHistory{current}, 0, $results_copy;
    set_prev_next_results_sensitivity();
}

sub display_previous_results {
    if ($ResultsHistory{current} > 0) {
        $ResultsHistory{current}--;
        display_relative_results($ResultsHistory{current});
    }
}

sub display_next_results {
    if ($ResultsHistory{current} < $#{$ResultsHistory{results}}) {
        $ResultsHistory{current}++;
        display_relative_results($ResultsHistory{current});
    }
}

sub display_relative_results {
    my ($nth_item) = @_;
    $liststore->clear if $CONFIG{clear_search_list};
    my $results_copy = $ResultsHistory{results}[$nth_item];
    display_results($results_copy, 1);
    set_prev_next_results_sensitivity();
}

sub set_prev_next_results_sensitivity {
    $gui->get_object('show_prev_results')->set_sensitive($ResultsHistory{current} > 0);
    $gui->get_object('show_next_results')->set_sensitive($ResultsHistory{current} < $#{$ResultsHistory{results}});
}

sub show_videos_from_selected_author {
    uploads('channel', get_channel_id_for_selected_video() || return);
}

sub show_playlists_from_selected_author {
    my $request = $yv_obj->playlists(get_channel_id_for_selected_video() || return);
    if ($yv_utils->has_entries($request)) {
        $liststore->clear if $CONFIG{clear_search_list};
        display_results($request);
    }
    else {
        die "No playlists found...\n";
    }
    return 1;
}

sub set_entry_details {
    my ($code, $iter, %opt) = @_;

    my $type = $liststore->get($iter, 7);
    my $info = $yv_obj->parse_json_string($liststore->get($iter, 8));

    # Setting title
    my $title = $yv_utils->get_title($info);

    if ($type eq 'channel' or $type eq 'subscription') {
        $title = $yv_utils->get_channel_title($info);
    }

    $title = encode_entities($title);

    $gui->get_object('video_title_label')->set_label("<big><big><b>$title</b></big></big>");
    $gui->get_object('video_title_label')->set_tooltip_markup("<b>$title</b>");

    my $text_info;

    if ($type eq 'video') {

        if ($opt{extra_info}) {
            my $extra_info = $yv_obj->video_details($yv_utils->get_video_id($info));

            foreach my $key (keys %$extra_info) {
                $info->{$key} = $extra_info->{$key};
            }
        }

        my $details_format = <<"EOT";
$symbols{author}\t%s
$symbols{category}\t%s
$symbols{play}\t%s
$symbols{average}\t%s
$symbols{views}\t%s
$symbols{published}\t%s
$symbols{author_id}\t%s
EOT

        $text_info = sprintf($details_format,
                             $yv_utils->get_channel_title($info) // 'unknown',
                             $yv_utils->get_category_name($info) // 'unknown',
                             $yv_utils->get_time($info)          // 'unknown',
                             $yv_utils->get_rating($info)        // 'unknown',
                             $yv_utils->set_thousands($yv_utils->get_views($info) // 0),
                             $yv_utils->get_publication_date($info) // 'unknown',
                             $yv_utils->get_channel_id($info)       // 'unknown',
                            );
    }
    elsif ($type eq 'playlist') {

        my $details_format = <<"EOT";
$symbols{author}\t%s
$symbols{video}\t%s videos
$symbols{author_id}\t%s
$symbols{play}\t%s
EOT

        $text_info = sprintf($details_format,
                             $yv_utils->get_channel_title($info) // 'unknown',
                             $yv_utils->set_thousands($yv_utils->get_playlist_video_count($info) // 0),
                             $yv_utils->get_channel_id($info)  // 'unknown',
                             $yv_utils->get_playlist_id($info) // 'unknown',
                            );
    }
    elsif ($type eq 'channel' or $type eq 'subscription') {

        my $details_format = <<"EOT";
$symbols{author}\t%s
$symbols{video}\t%s videos
$symbols{subs}\t%s subscribers
$symbols{author_id}\t%s
EOT

        $text_info = sprintf($details_format,
                             $yv_utils->get_channel_title($info) // 'unknown',
                             $yv_utils->short_human_number($yv_utils->get_video_count($info)      // 0),
                             $yv_utils->short_human_number($yv_utils->get_subscriber_count($info) // 0),
                             $yv_utils->get_channel_id($info) // 'unknown',
                            );
    }

    $gui->get_object('video_details_label')->set_label("<big>" . encode_entities("\n" . $text_info) . "</big>");

    # Setting the link button
    my $url        = make_youtube_url($type, $code);
    my $linkbutton = $gui->get_object('linkbutton1');

    $linkbutton->set_label($url);
    $linkbutton->set_uri($url);

    my %thumbs = (
                  start  => 1,
                  middle => 2,
                  end    => 3,
                 );

    # Getting thumbs
    foreach my $nr (keys %thumbs) {

        $gui->get_object("image$thumbs{$nr}")->set_from_pixbuf($default_thumb);

        Glib::Idle->add(
            sub {
                my ($nr) = @{$_[0]};

                my $url = $yv_utils->get_thumbnail_url($info, $nr);

                #~ my $thumbnail = $info->{snippet}{thumbnails}{medium};
                #~ my $url       = $thumbnail->{url};

                if ($url =~ /_live\.\w+\z/) {
                    ## no extra thumbnails available while video is LIVE
                }
                else {
                    $url =~ s{/\w+\.(\w+)\z}{/mq$thumbs{$nr}.$1};
                }

                my ($size_x, $size_y) = (160, 90);

                if ($type eq 'subscription' or $type eq 'channel') {
                    ($size_x, $size_y) = (120, 120);
                }

                my $pixbuf = get_pixbuf_thumbnail_from_url($url, $size_x, $size_y);
                $gui->get_object("image$thumbs{$nr}")->set_from_pixbuf($pixbuf);

                return 0;
            },
            [$nr],
            Glib::G_PRIORITY_LOW
                       );
    }

    # Setting textview description
    set_text($gui->get_object('description_textview'), $yv_utils->get_description($info));

    if ($type eq 'video' and not $opt{extra_info}) {
        Glib::Idle->add(sub { set_entry_details($code, $iter, extra_info => 1); return 0 }, [], Glib::G_PRIORITY_LOW);
    }

    return 1;
}

sub on_mainw_destroy {

    # Save hpaned position
    $CONFIG{hpaned_position} = $hbox2->get_position;

    get_main_window_size();
    dump_configuration();
    save_usernames_to_file();
    save_session();

    'Gtk3'->main_quit;
}

$notebook->set_current_page($CONFIG{default_notebook_page});

if ($CONFIG{remember_session} and -f $session_file) {

    my $session = eval { Storable::retrieve($session_file) };

    if (ref($session) eq 'HASH') {
        %ResultsHistory = %{$session->{history}};
        $search_entry->set_text($session->{keyword});
        $search_entry->set_position(length($session->{keyword}));
        $search_entry->select_region(0, -1);

        if (not @ARGV) {
            Glib::Idle->add(
                sub {
                    display_relative_results($ResultsHistory{current});
                    return 0;
                },
                [],
                Glib::G_PRIORITY_LOW
                           );
        }
    }
    else {
        warn "[!] Failed to load previous session...\n";
        warn "[!] Reason: $@\n" if $@;
    }
}

if (@ARGV) {
    my $text = join(' ', @ARGV);
    $search_entry->set_text($text);
    $search_entry->set_position(length($text));
    Glib::Idle->add(sub { search(); return 0 }, [], Glib::G_PRIORITY_LOW);
}

'Gtk3'->main;