/**
 * This class is used for local stream manipulation.
 * @remarks
 * This class wraps up browser media stream and HTMLMedia element
 * and takes care of rendering the media on a given element.
 * This provides enough abstraction so that the higher level
 * classes do not need to know about the browser specificities for
 * media.
 * This will also provide stream related functionalities such as
 * mixing of 2 streams in to 2, adding/removing tracks, getting a track information
 * detecting voice energy etc. Which will be implemented as when needed
 */

import Stream from './Stream';

export default class RemoteStream extends Stream {
	private renderingMediaElement: HTMLMediaElement | undefined;

	constructor(mediaStream: MediaStream) {
		super(mediaStream);
	}

	/**
	 * Called for initializing the class
	 * @remarks
	 */

	init(rmElement: HTMLMediaElement): void {
		if (this.renderingMediaElement) {
			// Someone already has setup the stream and initializing it once again
			// Clear the existing stream object
			this.renderingMediaElement.pause();
			this.renderingMediaElement.srcObject = null;
		}
		this.renderingMediaElement = rmElement;
	}

	/**
	 * Called for playing the stream
	 * @remarks
	 * Plays the stream on media element. Stream will be autoplayed and muted based on the settings.
	 * throws and error if the play fails.
	 */

	play(autoPlay = true, muteAudio = false): void {
		if (this.renderingMediaElement && this.mediaStream) {
			this.renderingMediaElement.autoplay = autoPlay;
			this.renderingMediaElement.srcObject = this.mediaStream;
			if (autoPlay) {
				this.renderingMediaElement.play().catch((error: Error) => {
					throw error;
				});
			}
			if (muteAudio) {
				this.renderingMediaElement.volume = 0;
			}
		}
	}

	/**
	 * Called for pausing the stream
	 * @remarks
	 */
	pause(): void {
		this.renderingMediaElement?.pause();
	}

	clear(): void {
		super.clear();
		if (this.renderingMediaElement) {
			this.renderingMediaElement.pause();
			this.renderingMediaElement.srcObject = null;
		}
	}
}