#!/bin/bash

# The name of polybar bar which houses the main spotify module and the control modules.
PARENT_BAR="${1:-music}"
PARENT_BAR_PID=$(pgrep -a "polybar" | grep "$PARENT_BAR" | cut -d" " -f1)

urldecode() { : "${*//+/ }"; echo -e "${_//%/\\x}"; }

send_hook() {
    [ -z "$1" ] && echo "send_hook: missing arg" && exit 1
    polybar-msg -p "$PARENT_BAR_PID" hook mpris-play-pause "$1" 1>/dev/null 2>&1
}


extract_meta() {
    grep "$1\W" <<< "$meta" | awk '{$1=$2=""; print $0}' | sed 's/^ *//; s/; */;/g' | paste -s -d/ -
}

# if "icon" given, determine icon. otherwise, print metadata
get_info() {
    if [ -z "$1" ]; then
        echo "Usage: get_info PLAYER [icon]"
        exit 1
    fi

    meta=$(playerctl -p "$1" metadata)

    # get title
    title=$(extract_meta title)
    # if no title, try url e.g. vlc
    if [ -z "$title" ]; then
        title=$(extract_meta url)
        title=$(urldecode "${title##*/}")
    fi

    # if not "icon", display information and return
    artist=$(extract_meta artist)
    [ -z "$artist" ] && artist=$(extract_meta albumArtist)

    if [ -n "$artist" ]; then
        album=$(extract_meta album)
        [ -n "$album" ] && echo -n " 󰫔 $album "

        echo -n " 󰠃 $artist  "
    fi

    echo "$title"
    return 0
}

# manually go through players
read -d'\n' -ra PLAYERS <<<"$(playerctl -l 2>/dev/null)"
declare -a PAUSED
for player in "${PLAYERS[@]}"; do
    [ "$player" = "playerctld" ] && continue;

    p_status=$(playerctl -p "$player" status 2>/dev/null)

    # if we have one playing, we'll use it and EXIT
    if [ "$p_status" = "Playing"  ]; then
        send_hook 1
        get_info "$player" "$2"
        exit 0;
    fi

    [ "$p_status" = "Paused" ] && PAUSED+=("$player")
done

# if we have a paused, show it otherwise assume there are no players or have all stopped
if [ -n "${PAUSED[0]}" ]; then
    send_hook 2
    get_info "${PAUSED[0]}" "$2"
else
    [ "$2" = icon ] && echo "none" || echo " 󰒲  no players "
fi