#!/bin/sh

####################
# Name: shelltube.sh
# Date: 2016-12-11
# Lisc: ISC
# Main: jadedctrl
# Desc: Full-shell YT client that
#       avoids the YT API.  #####################

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

function search() {
    output="/tmp/$(mktemp -u yt-search_XXXXX)"
    yt-search -i "$1" $output
    selected_video=$(cat $output)
    metadata
}

function channel() {
    output="/tmp/$(mktemp -u yt-channel_XXXXX)"
    if echo "$1" | grep "^UC" > /dev/null
    then
        yt-channel -ic "$1" $output
    else
        yt-channel -iu "$1" $output
    fi
    selected_video=$(cat $output)
    metadata
}

function interactive() {
    get_input
}

function about() {
    printf '\033[0;35mShelltube v0.4.5\n'
    printf '\033[0;32mDesc: \033[0;34mYT client written in shell.\n'
    printf '\033[0;32mMain: \033[0;34mjadedml@openmailbox.org\n'
    printf '\033[0;32mLisc: \033[0;34mISC; yt-down GPLv2\033[0m\n'
}

function metadata() {
    yt-meta "$selected_video"
}

function download() {
    yt-down "$selected_video"
}

function stream() {
    yt-down -s "$selected_video"
}

function get_input() {
    printf '\033[0;34m%s \033[0;32m>>\033[0m ' "$selected_video"
    read -r n
    case $n in
        help|'?')
            help     ; interactive ;;
        download|dl)
            download ; interactive ;;
        metadata|md)
            metadata ; interactive ;;
        stream|str)
            stream   ; interactive ;;
        about|'!')
            about    ; interactive ;;
        clear|cls)
            clear    ; interactive ;;
        exit)
            rm /tmp/yt-* ; exit ;;
        *)
            if [ "$n" ] && [ -z "${n%search *}" ]
            then
                search "${n#search }"
                interactive
            elif [ "$n" ] && [ -z "${n%/*}" ]
            then
                search "${n#/}"
                interactive
            elif [ "$n" ] && [ -z "${n%channel *}" ]
            then
                channel "${n#channel }"
                interactive
            elif [ "$n" ] && [ -z "${n%chan *}" ]
            then
                channel "${n#chan }"
                interactive
            elif echo "$n" | grep "^video " > /dev/null
            then
                if echo "$n" | grep "youtube.com"
                then
                    selected_video="$(echo "$n" | sed 's/.*watch?v=//')"
                else
                    selected_video="$(echo "$n" | sed 's/video //')"
                fi
                metadata
                interactive
            elif echo "$n" | grep "^sel " > /dev/null
            then
                if echo "$n" | grep "youtube.com"
                then
                    selected_video="$(echo "$n" | sed 's/.*watch?v=//')"
                else
                    selected_video="$(echo "$n" | sed 's/sel //')"
                fi
                metadata
                interactive
            elif echo "$n" | grep "^url " > /dev/null
            then
                if echo "$n" | grep "youtube.com"
                then
                    selected_video="$(echo "$n" | sed 's/.*watch?v=//')"
                else
                    selected_video="$(echo "$n" | sed 's/url //')"
                fi
                metadata
                interactive
            else
                get_input
            fi
    ;;
    esac
}


function help() {
    echo "about    | !        View the about page."
    echo "clear    | cls      Clear the screen."
    echo "download | dl       Download the selected video."
    echo "exit     | ctrl+c   Exit Shelltube."
    echo "help     | ?        Display this message."
    echo "metadata | md       Display selected video's metadata."
    echo "search   | /        Perform a search."
    echo "channel  | chan     Show newest videos of a channel."
    echo "stream   | str      Stream the selected video."
    echo "video | sel | url   Select video based on URL or ID."
    echo "Note about usage:"
    echo "Both 'video ID; download' and 'download ID' are valid."
    echo "You don't need to select a video to run commands on it,"
    echo "but if you use metadata, download, or stream on an"
    echo "unselected video you must specify the ID or URL after the"
    echo "command."
}
     
printf '\033[0;35mShelltube v0.4.5'
interactive