#!/bin/sh

####################
# Name: shelltube.sh
# Lisc: ISC
# Main: jadedctrl
# Desc: Full-shell YT client that avoids the YT API.
  Vers=0.4
#####################

# Roadmap:
# v1.0 - [ ] Playlist support
#        [X] Channel support
#        [ ] Audio dl/stream
#        [ ] Show related videos
#        [ ] Channel & Playlist search
#        [ ] Search filters
#        [ ] Search & Channel sort-by
#        [X] Config video player, etc
#        [ ] Overall better interface
#        [ ] Cli args as commands

if [ -e $HOME/.config/shelltube ]
then
    . $HOME/.config/shelltube
fi

search() {
    output="$(mktemp -u /tmp/yt_XXXXXX)"
    yt-search -i "$1" "$output"
    selected_video="$(cat "$output")"
    yt-meta "$selected_video"
}

channel() {
    output="$(mktemp -u /tmp/yt-channel_XXXXXX)"
    case "$1" in
    UC* )
        yt-channel -ic "$1" "$output"
        ;;
    * )
        yt-channel -iu "$1" "$output"
        ;;
    esac
    selected_video="$(cat "$output")"
    yt-meta "$selected_video"
}

about() {
    printf '\033[35mShelltube v%s\033[m\n' "$Vers"
    printf '\033[32mDesc: \033[0;34mYT client written in shell.\033[m\n'
    printf '\033[32mMain: \033[0;34mjadedml@openmailbox.org\033[m\n'
    printf '\033[32mLisc: \033[0;34mISC; yt-down GPLv2\033[m\n'
}

help() {
    printf "\
about    | !        View the about page.
clear    | cls      Clear the screen.
download | dl       Download the selected video.
exit     | ctrl+c   Exit Shelltube.
help     | ?        Display this message.
metadata | md       Display selected video's metadata.
search   | /        Perform a search.
channel  | chan     Show newest videos of a channel.
stream   | str      Stream the selected video.
video | sel | url   Select video based on URL or ID.
Note about usage:
Both 'video ID; download' and 'download ID' are valid.  You don't need to
select a video to run commands on it, but if you use metadata, download, or
stream on an unselected video you must specify the ID or URL after the command.
"
}

parse() {
    command="$1" argument="$2"

    case "$command" in
    help | '?' )
        help
        ;;
    search )
        search "$argument"
        ;;
    /* )
        search "${command#/} $argument"
        ;;
    channel )
        channel "$argument"
        ;;
    chan )
        channel "$argument"
        ;;
    video | sel | url )
        case "$argument" in
        *youtube.com* )
            selected_video="$argument"
            ;;
        *)
            selected_video="$argument"
            ;;
        esac
        yt-meta "$selected_video"
        ;;
    metadata | md )
        selected_video="${argument:-$selected_video}"
        yt-meta "$selected_video"
        ;;
    download | dl )
        selected_video="${argument:-$selected_video}"
        yt-down "$selected_video"
        ;;
    stream | str )
        selected_video="${argument:-$selected_video}"
        yt-down -s "$selected_video"
        ;;
    about | ! )
        about
        ;;
    clear | cls )
        printf '\033[H\033[J'
        ;;
    exit )
        rm -f "/tmp/yt-$$"
        exit
        ;;
    '' ) ;;
    * )
        printf 'unknown command: "%s"\ntry "help"\n' "$command"
        ;;
    esac
}

if [ "$#" -gt 0 ]
then
    for arg in "$@"
    do
        parse "${arg%% *}" "${arg#* }"
    done
else
    printf '\n \033[1mshell\033[41m Tube \033[0;1;30m v%s\033[m\n\n' "$Vers"

    while printf '\033[0;34m%s \033[0;32m>>\033[m ' "$selected_video"
    do
        read -r command argument
        parse "$command" "$argument"
    done
fi