import { AudioContext } from '../audio/AudioContext.js';
import { FileLoader } from './FileLoader.js';
import { Loader } from './Loader.js';

class AudioLoader extends Loader {

	constructor( manager ) {

		super( manager );

	}

	load( url, onLoad, onProgress, onError ) {

		const scope = this;

		const loader = new FileLoader( this.manager );
		loader.setResponseType( 'arraybuffer' );
		loader.setPath( this.path );
		loader.setRequestHeader( this.requestHeader );
		loader.setWithCredentials( this.withCredentials );
		loader.load( url, function ( buffer ) {

			try {

				// Create a copy of the buffer. The `decodeAudioData` method
				// detaches the buffer when complete, preventing reuse.
				const bufferCopy = buffer.slice( 0 );

				const context = AudioContext.getContext();
				context.decodeAudioData( bufferCopy, function ( audioBuffer ) {

					onLoad( audioBuffer );

				}, handleError );

			} catch ( e ) {

				handleError( e );

			}

		}, onProgress, onError );

		function handleError( e ) {

			if ( onError ) {

				onError( e );

			} else {

				console.error( e );

			}

			scope.manager.itemError( url );

		}

	}

}


export { AudioLoader };