import { Entry } from "./entry";
import { makeIDGen } from "./util";

const playlistIndexGen = makeIDGen(0);

export abstract class Playlist {
	public entries: Entry[] = [];
	constructor(public index = playlistIndexGen.next().value) {}

	abstract toXML(): string;

	addEntry(entry: Entry) {
		this.entries.push(entry);
	}

	renderEntries() {
		return this.entries.map((e) => e.toXML()).join("\n");
	}
}

export class AudioPlaylist extends Playlist {
	toXML() {
		return /* HTML */ `<playlist id="playlist${this.index}">
			<property name="kdenlive:audio_track">1</property>
			${this.renderEntries()}
		</playlist>`;
	}
}

export class VideoPlaylist extends Playlist {
	toXML() {
		return /* HTML */ ` <playlist id="playlist${this.index}">
			${this.renderEntries()}
		</playlist>`;
	}
}