#!/bin/bash
# shellcheck source=/dev/null
#----------------------------
# Check if a command exists
#----------------------------
function _which() {
    command -v "$1" &> /dev/null
}

#----------------------------
# Check if a URL is reachable
#----------------------------
function _url_exists() {
    curl --output /dev/null --silent --head --write-out "%{http_code}" "$1"
}

#------------------
# Set working URLs
#------------------
function _urls() {
    URL_1="https://git.fridu.us/heckyel/hyperterm"
    URL_2="https://c.fridu.us/software/hyperterm.git"

    if [ "$(_url_exists "$URL_1")" -eq 200 ]; then
        URL="$URL_1"
        RAW="$URL_1/raw/branch/master"
    elif [ "$(_url_exists "$URL_2")" -eq 200 ]; then
        URL="$URL_2"
        RAW="$URL_2/plain"
    else
        msg_err "El repositorio no está disponible o no hay conexión a Internet." \
                "The repository is unavailable or there's no internet connection."
        exit 1
    fi
}

#----------------------------
# Download file with curl
#----------------------------
function download_file() {
    local remote_path=$1
    local local_path=$2
    mkdir -p "$(dirname "$local_path")"
    curl -Ls "$RAW/$remote_path" -o "$local_path"
}

#----------------------------
# Download _custom.sh if missing
#----------------------------
function ifexists_custom() {
    _urls
    local custom_path="$HOME/.hyperterm/_custom.sh"
    if [ ! -e "$custom_path" ]; then
        download_file "hyperterm/_custom.sh" "$custom_path"
    fi
}

#----------------------------
# Show progress bar
#----------------------------
function show_progress() {
    case $1 in
        1) printf '%s\r' "#####                   (33%)" ;;
        2) printf '%s\r' "#############           (66%)" ;;
        3) printf '%s\n' "####################### (100%) done!" ;;
    esac
}

#----------------------------
# Update HyperTerm environment
#----------------------------
function updbashrc() {
    _urls

    # Step 1: Download checksum and _custom.sh
    download_file "hyperterm/hyperterm.sha512" "$HOME/.hyperterm/hyperterm.sha512"
    ifexists_custom

    # Step 2: Verify checksum
    (cd "$HOME/.hyperterm/" && sha512sum -c hyperterm.sha512 &> /dev/null)
    local _interger=$?

    if [[ "$_interger" -eq 0 ]]; then
        # Load colors and print banner
        _colors_bash "$@"
        printf '%b' "${BOLD}${CYAN}"
        printf '%s\n' '     __  __                     ______                   '
        printf '%s\n' '    / / / /_  ______  ___  ____/_  __/__  _________ ___  '
        printf '%s\n' '   / /_/ / / / / __ \/ _ \/ ___// / / _ \/ ___/ __ `__ \ '
        printf '%s\n' '  / __  / /_/ / /_/ /  __/ /   / / /  __/ /  / / / / / / '
        printf '%s\n' ' /_/ /_/\__, / .___/\___/_/   /_/  \___/_/  /_/ /_/ /_/  '
        printf '%s\n' '       /____/_/                                          '
        printf '%s\n' '                                                         '
        printf '%b' "${BOLD}${GREY}"
        msg "✔️ HyperTerm se ha actualizado y/o está en la versión actual." \
            "✔️ HyperTerm has been updated and/or is at the current version."
        msg "Puede reportar errores en https://todo.sr.ht/~heckyel/hyperterm" \
            "You can report issues at https://todo.sr.ht/~heckyel/hyperterm"
        msg "Obtén tu copia en: https://c.fridu.us/software/hyperterm.git" \
            "Get your copy at: https://c.fridu.us/software/hyperterm.git"
        printf '%b\n' "$RESET"
    else
        msg "Fallo de checksum. Re-descargando archivos desde: $URL" \
            "Checksum failed. Re-downloading files from: $URL"
        show_progress 1
        sleep 1

        # Step 3: Core files
        for f in autocomplete.sh colors.sh git.sh languages.sh status.sh update.sh; do
            download_file "hyperterm/core/$f" "$HOME/.hyperterm/core/$f"
        done

        # Step 4: Themes
        for f in default.sh joy.sh light_theme.sh minterm.sh pure.sh simple.sh special.sh; do
            download_file "hyperterm/themes/$f" "$HOME/.hyperterm/themes/$f"
        done

        show_progress 2
        sleep 1

        # Step 5: Tools
        for f in aliases.sh compress.sh export.sh listuser.sh network.sh proxy.sh rar2zip.sh ruby.sh ssh-agent.sh sysinfo.sh vconverter.sh virtualenv.sh; do
            download_file "hyperterm/tools/$f" "$HOME/.hyperterm/tools/$f"
        done

        # Step 6: Main files
        download_file "hyperterm/hyperterm.sh" "$HOME/.hyperterm/hyperterm.sh"
        download_file "hyperterm/hyperterm.sha512" "$HOME/.hyperterm/hyperterm.sha512"
        download_file ".bash_profile" "$HOME/.bash_profile"

        ifexists_custom
        show_progress 3
        _colors_bash "$@"
        source "$HOME/.bashrc"
    fi
}

#------------------------------------
# Overwrite _custom.sh interactively
#------------------------------------
function updbashrc_custom() {
    _urls
    if [ "$(_url_exists "$URL")" -eq 200 ]; then
        while true; do
            question=$(msg "¿Estás seguro de sobre-escribir _custom.sh? [s/N]: " \
                           "Are you sure to overwrite _custom.sh? [y/N]: ")
            read -r -p "$question" input
            case "$input" in
                [yY]|[sS])
                    download_file "hyperterm/_custom.sh" "$HOME/.hyperterm/_custom.sh"
                    source "$HOME/.bashrc"
                    break ;;
                [nN]|"") break ;;
                *) msg "Por favor responde sí o no." \
                       "Please answer yes or no." ;;
            esac
        done
    else
        msg_err "El repositorio no está disponible o no hay conexión a Internet." \
                "The repository is unavailable or there's no internet connection."
        return 1
    fi
}