/* FediMusicPlayer - An HTML5 + Javascript Music Player
 * Copyright (C) 2023  <yanderefed@proton.me>
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

function appendMusicList(el, title, time)
{
	const tr = document.createElement("tr")
	const tdtitle = document.createElement("td")
	const tdtime = document.createElement("td")
	const div = document.createElement("div")

	tdtime.setAttribute("width", "50")
	tdtime.innerHTML = time
	div.setAttribute("class", "ellipsis")
	div.setAttribute("colspan", "2")
	div.innerHTML = title

	tdtitle.appendChild(div)
	tr.appendChild(tdtitle)
	tr.appendChild(tdtime)
	el.appendChild(tr)

	return tr
}

function wrap(idx, len)
{
	return idx >= 0 ? idx % len : (idx % len + len) % len
}

function audioPlayer()
{
	const aPlay = document.getElementById("audioPlayer")
	const aList = document.getElementById("audioPlaylist")
	const aTrack = document.getElementById("audioTrack")
	const aArtist = document.getElementById("audioArtist")
	const aCoverArt = document.getElementById("audioCoverArt")

	var currentSong = null
	var aListLinks = []

	function changeSong(idx, doplay=true)
	{
		if (idx === currentSong)
		{
			aPlay.play()
			return
		}
		if (currentSong !== null)
		{
			aListLinks[currentSong].classList.remove("current-song");
		}
		currentSong = wrap(idx, aListLinks.length)
		aListLinks[currentSong].classList.add("current-song");

		const aSelected = aListLinks[currentSong].getElementsByTagName("div")[0]
		aPlay.src = musicList[currentSong][0]
		aTrack.innerHTML = musicList[currentSong][1]
		aArtist.innerHTML = musicList[currentSong][2]
		aCoverArt.src = musicList[currentSong][4]
		if (doplay === true)
		{
			aPlay.play()
		}
	}

	musicList.forEach((value, index, array) => {
		const el = appendMusicList(aList, value[1], value[3])
		aListLinks.push(el)
		el.addEventListener("click", () => {
			// el.preventDefault();
			changeSong(index)
		})
	})

	aPlay.addEventListener("ended", function(){
		changeSong(currentSong + 1)
	})
	changeSong(0, false);
}