import * as mpd from "./lib/mpd.js";
import * as art from "./lib/art.js";
import * as html from "./lib/html.js";
import * as format from "./lib/format.js";
import * as pubsub from "./lib/pubsub.js";

const DELAY = 2000;
const DOM = {};

let current = {};
let node;
let idleTimeout = null;

function sync(data) {
	DOM.elapsed.textContent = format.time(Number(data["elapsed"] || 0)); // changed time

	if (data["file"] != current["file"]) { // changed song
		if (data["file"]) { // playing at all?
			DOM.duration.textContent = format.time(Number(data["duration"] || 0));
			DOM.title.textContent = data["Title"] || data["file"].split("/").pop();
			DOM["artist-album"].textContent = format.artistAlbum(data["Artist"], data["Album"]);
		} else {
			DOM.duration.textContent = "";
			DOM.title.textContent = "";
			DOM["artist-album"].textContent = "";
		}

		pubsub.publish("song-change", null, data);
	}

	if (data["Artist"] != current["Artist"] || data["Album"] != current["Album"]) { // changed album (art)
		DOM.art.innerHTML = "";
		art.get(data["Artist"], data["Album"], data["file"]).then(src => {
			if (!src) { return; }
			let image = html.node("img", {src});
			DOM.art.appendChild(image);
		});
	}

	let flags = [];
	if (data["random"] == "1") { flags.push("random"); }
	if (data["repeat"] == "1") { flags.push("repeat"); }
	node.dataset.flags = flags.join(" ");

	node.dataset.state = data["state"];

	current = data;
}

function idle() {
	idleTimeout = setTimeout(update, DELAY);
}

function clearIdle() {
	idleTimeout && clearTimeout(idleTimeout);
	idleTimeout = null;
}

async function command(cmd) {
	clearIdle();
	let data = await mpd.commandAndStatus(cmd);
	sync(data);
	idle();
}

export async function update() {
	clearIdle();
	let data = await mpd.status();
	sync(data);
	idle();
}

export function init(n) {
	node = n;
	let all = node.querySelectorAll("[class]");
	Array.from(all).forEach(node => DOM[node.className] = node);

	DOM.play.addEventListener("click", e => command("play"));
	DOM.pause.addEventListener("click", e => command("pause 1"));
	DOM.prev.addEventListener("click", e => command("previous"));
	DOM.next.addEventListener("click", e => command("next"));

	DOM.random.addEventListener("click", e => command(`random ${current["random"] == "1" ? "0" : "1"}`));
	DOM.repeat.addEventListener("click", e => command(`repeat ${current["repeat"] == "1" ? "0" : "1"}`));

	update();
}