import { TNativeMediaStreamAudioSourceNodeFactory } from '../types';

export const createNativeMediaStreamAudioSourceNode: TNativeMediaStreamAudioSourceNodeFactory = (nativeAudioContext, { mediaStream }) => {
    const audioStreamTracks = mediaStream.getAudioTracks();
    /*
     * Bug #151: Safari does not use the audio track as input anymore if it gets removed from the mediaStream after construction.
     * Bug #159: Safari picks the first audio track if the MediaStream has more than one audio track.
     */
    audioStreamTracks.sort((a, b) => (a.id < b.id ? -1 : a.id > b.id ? 1 : 0));

    const filteredAudioStreamTracks = audioStreamTracks.slice(0, 1);

    const nativeMediaStreamAudioSourceNode = nativeAudioContext.createMediaStreamSource(new MediaStream(filteredAudioStreamTracks));

    /*
     * Bug #151 & #159: The given mediaStream gets reconstructed before it gets passed to the native node which is why the accessor needs
     * to be overwritten as it would otherwise expose the reconstructed version.
     */
    Object.defineProperty(nativeMediaStreamAudioSourceNode, 'mediaStream', { value: mediaStream });

    return nativeMediaStreamAudioSourceNode;
};