/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */

import {ZoneType} from '../zone-impl';

export function patchRtcPeerConnection(Zone: ZoneType): void {
  Zone.__load_patch('RTCPeerConnection', (global: any, Zone: ZoneType, api: _ZonePrivate) => {
    const RTCPeerConnection = global['RTCPeerConnection'];
    if (!RTCPeerConnection) {
      return;
    }

    const addSymbol = api.symbol('addEventListener');
    const removeSymbol = api.symbol('removeEventListener');

    RTCPeerConnection.prototype.addEventListener = RTCPeerConnection.prototype[addSymbol];
    RTCPeerConnection.prototype.removeEventListener = RTCPeerConnection.prototype[removeSymbol];

    // RTCPeerConnection extends EventTarget, so we must clear the symbol
    // to allow patch RTCPeerConnection.prototype.addEventListener again
    RTCPeerConnection.prototype[addSymbol] = null;
    RTCPeerConnection.prototype[removeSymbol] = null;

    api.patchEventTarget(global, api, [RTCPeerConnection.prototype], {useG: false});
  });
}
