export MUSIC_DIR="$HOME/Music"

function music_get_song_info_from_file() {
    local path="$1"

    local mpd_path="$path"
    if [[ ! -f "$path" && -f "$MUSIC_DIR/$path" ]]
    then
        path="$MUSIC_DIR/$path"
    else
        mpd_path="$(echo "$path" | tail -c+$(( $(echo "$MUSIC_DIR" | wc -c) + 1 )))"
    fi
    if [[ ! -f "$path" ]]
    then
        echo "ERROR: music_get_song_info_from_file: file not found: $path" >&2
        exit 1
    fi

    if [[ "$(echo "${path}" | sed -e 's/^.*\.\([^\.]*\)$/\1/')" == "mp3" ]]
    then
        local metadata="mp3"
        local data="$(id3v2 -l "${path}")"
        local genre="$(echo "$data" | grep '^TCON' | sed -e 's/^.*: //' -e 's/ ([0-9]*)$//')"
        local artist="$(echo "$data" | grep '^TPE2' | sed -e 's/^.*: //')"
        local album="$(echo "$data" | grep '^TALB' | sed -e 's/^.*: //')"
        local title="$(echo "$data" | grep '^TIT2' | sed -e 's/^.*: //')"
    else
        local metadata="flac"
        local data="$(ffmpeg -i "${path}" 2>&1)"
        local genre="$(echo "$data" | grep GENRE | sed -e 's/^.*: //')"
        local artist="$(echo "$data" | grep ARTIST | sed -e 's/^.*: //')"
        local album="$(echo "$data" | grep ALBUM | sed -e 's/^.*: //')"
        local title="$(echo "$data" | grep TITLE | sed -e 's/^.*: //')"
    fi

    echo "{\"path\":{\"file\":\"$path\",\"mpd\":\"$mpd_path\"},\"title\":\"$title\",\"album\":\"$album\",\"artist\":\"$artist\",\"genre\":\"$genre\"}"
}

function music_process_genre() {
    local song="$1"

    local genre="$(echo "$song" | jq -c '.genre' || error_here)"

    local likeLevel="2"
    local blockLevel="0"
    if [[ "$(echo "$genre" | grep --no-ignore-case 'L[0-3]')" != "" ]]
    then
        likeLevel="$(echo "$genre" | grep --no-ignore-case -o 'L[0-3]' | grep -o '[0-3]')"
        genre="$(echo $genre | sed -e 's/L[0-3]//' -e 's/  / /g' -e 's/^" */"/' -e 's/ *"$/"/')"
    fi
    if [[ "$(echo "$genre" | grep --no-ignore-case 'B[0-3]')" != "" ]]
    then
        blockLevel="$(echo "$genre" | grep --no-ignore-case -o 'B[0-3]' | grep -o '[0-3]')"
        genre="$(echo $genre | sed -e 's/B[0-3]//' -e 's/  / /g' -e 's/^" */"/' -e 's/ *"$/"/')"
    fi

    local playlist="all"
    if [[ "${genre,,}" == "lofi" ]]
    then
        playlist="lofi"
    elif [[ "$(echo ${genre} | grep --no-ignore-case LE)" != "" ]]
    then
        playlist="le"
        genre="$(echo $genre | sed -e 's/LE//' -e 's/  / /g' -e 's/^" */"/' -e 's/ *"$/"/')"
    elif [[ "$(echo ${genre} | grep --no-ignore-case ME)" != "" ]]
    then
        playlist="me"
        genre="$(echo $genre | sed -e 's/ME//' -e 's/  / /g' -e 's/^" */"/' -e 's/ *"$/"/')"
    elif [[ "$(echo ${genre} | grep --no-ignore-case HE)" != "" ]]
    then
        playlist="he"
        genre="$(echo $genre | sed -e 's/HE//' -e 's/  / /g' -e 's/^" */"/' -e 's/ *"$/"/')"
    elif [[ "$(echo ${genre} | grep --no-ignore-case DNP)" == "" ]]
    then
        playlist="dnp"
        genre="$(echo $genre | sed -e 's/DNP//' -e 's/  / /g' -e 's/^" */"/' -e 's/ *"$/"/')"
    fi

    echo "$song {\"genre\":$genre,\"blockLevel\":$blockLevel,\"likeLevel\":$likeLevel,\"playlist\":\"$playlist\"}" \
        | jq -c -s add || error_here
}