/*
 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree.
 */
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.shimAudioContext = shimAudioContext;
exports.shimCallbacksAPI = shimCallbacksAPI;
exports.shimConstraints = shimConstraints;
exports.shimCreateOfferLegacy = shimCreateOfferLegacy;
exports.shimGetUserMedia = shimGetUserMedia;
exports.shimLocalStreamsAPI = shimLocalStreamsAPI;
exports.shimRTCIceServerUrls = shimRTCIceServerUrls;
exports.shimRemoteStreamsAPI = shimRemoteStreamsAPI;
exports.shimTrackEventTransceiver = shimTrackEventTransceiver;
var utils = _interopRequireWildcard(require("../utils"));
function _interopRequireWildcard(e, t) { if ("function" == typeof WeakMap) var r = new WeakMap(), n = new WeakMap(); return (_interopRequireWildcard = function _interopRequireWildcard(e, t) { if (!t && e && e.__esModule) return e; var o, i, f = { __proto__: null, "default": e }; if (null === e || "object" != _typeof(e) && "function" != typeof e) return f; if (o = t ? n : r) { if (o.has(e)) return o.get(e); o.set(e, f); } for (var _t in e) "default" !== _t && {}.hasOwnProperty.call(e, _t) && ((i = (o = Object.defineProperty) && Object.getOwnPropertyDescriptor(e, _t)) && (i.get || i.set) ? o(f, _t, i) : f[_t] = e[_t]); return f; })(e, t); }
function _typeof(o) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) { return typeof o; } : function (o) { return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o; }, _typeof(o); }
function shimLocalStreamsAPI(window) {
  if (_typeof(window) !== 'object' || !window.RTCPeerConnection) {
    return;
  }
  if (!('getLocalStreams' in window.RTCPeerConnection.prototype)) {
    window.RTCPeerConnection.prototype.getLocalStreams = function getLocalStreams() {
      if (!this._localStreams) {
        this._localStreams = [];
      }
      return this._localStreams;
    };
  }
  if (!('addStream' in window.RTCPeerConnection.prototype)) {
    var _addTrack = window.RTCPeerConnection.prototype.addTrack;
    window.RTCPeerConnection.prototype.addStream = function addStream(stream) {
      var _this = this;
      if (!this._localStreams) {
        this._localStreams = [];
      }
      if (!this._localStreams.includes(stream)) {
        this._localStreams.push(stream);
      }
      // Try to emulate Chrome's behaviour of adding in audio-video order.
      // Safari orders by track id.
      stream.getAudioTracks().forEach(function (track) {
        return _addTrack.call(_this, track, stream);
      });
      stream.getVideoTracks().forEach(function (track) {
        return _addTrack.call(_this, track, stream);
      });
    };
    window.RTCPeerConnection.prototype.addTrack = function addTrack(track) {
      var _this2 = this;
      for (var _len = arguments.length, streams = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
        streams[_key - 1] = arguments[_key];
      }
      if (streams) {
        streams.forEach(function (stream) {
          if (!_this2._localStreams) {
            _this2._localStreams = [stream];
          } else if (!_this2._localStreams.includes(stream)) {
            _this2._localStreams.push(stream);
          }
        });
      }
      return _addTrack.apply(this, arguments);
    };
  }
  if (!('removeStream' in window.RTCPeerConnection.prototype)) {
    window.RTCPeerConnection.prototype.removeStream = function removeStream(stream) {
      var _this3 = this;
      if (!this._localStreams) {
        this._localStreams = [];
      }
      var index = this._localStreams.indexOf(stream);
      if (index === -1) {
        return;
      }
      this._localStreams.splice(index, 1);
      var tracks = stream.getTracks();
      this.getSenders().forEach(function (sender) {
        if (tracks.includes(sender.track)) {
          _this3.removeTrack(sender);
        }
      });
    };
  }
}
function shimRemoteStreamsAPI(window) {
  if (_typeof(window) !== 'object' || !window.RTCPeerConnection) {
    return;
  }
  if (!('getRemoteStreams' in window.RTCPeerConnection.prototype)) {
    window.RTCPeerConnection.prototype.getRemoteStreams = function getRemoteStreams() {
      return this._remoteStreams ? this._remoteStreams : [];
    };
  }
  if (!('onaddstream' in window.RTCPeerConnection.prototype)) {
    Object.defineProperty(window.RTCPeerConnection.prototype, 'onaddstream', {
      get: function get() {
        return this._onaddstream;
      },
      set: function set(f) {
        var _this4 = this;
        if (this._onaddstream) {
          this.removeEventListener('addstream', this._onaddstream);
          this.removeEventListener('track', this._onaddstreampoly);
        }
        this.addEventListener('addstream', this._onaddstream = f);
        this.addEventListener('track', this._onaddstreampoly = function (e) {
          e.streams.forEach(function (stream) {
            if (!_this4._remoteStreams) {
              _this4._remoteStreams = [];
            }
            if (_this4._remoteStreams.includes(stream)) {
              return;
            }
            _this4._remoteStreams.push(stream);
            var event = new Event('addstream');
            event.stream = stream;
            _this4.dispatchEvent(event);
          });
        });
      }
    });
    var origSetRemoteDescription = window.RTCPeerConnection.prototype.setRemoteDescription;
    window.RTCPeerConnection.prototype.setRemoteDescription = function setRemoteDescription() {
      var pc = this;
      if (!this._onaddstreampoly) {
        this.addEventListener('track', this._onaddstreampoly = function (e) {
          e.streams.forEach(function (stream) {
            if (!pc._remoteStreams) {
              pc._remoteStreams = [];
            }
            if (pc._remoteStreams.indexOf(stream) >= 0) {
              return;
            }
            pc._remoteStreams.push(stream);
            var event = new Event('addstream');
            event.stream = stream;
            pc.dispatchEvent(event);
          });
        });
      }
      return origSetRemoteDescription.apply(pc, arguments);
    };
  }
}
function shimCallbacksAPI(window) {
  if (_typeof(window) !== 'object' || !window.RTCPeerConnection) {
    return;
  }
  var prototype = window.RTCPeerConnection.prototype;
  var origCreateOffer = prototype.createOffer;
  var origCreateAnswer = prototype.createAnswer;
  var setLocalDescription = prototype.setLocalDescription;
  var setRemoteDescription = prototype.setRemoteDescription;
  var addIceCandidate = prototype.addIceCandidate;
  prototype.createOffer = function createOffer(successCallback, failureCallback) {
    var options = arguments.length >= 2 ? arguments[2] : arguments[0];
    var promise = origCreateOffer.apply(this, [options]);
    if (!failureCallback) {
      return promise;
    }
    promise.then(successCallback, failureCallback);
    return Promise.resolve();
  };
  prototype.createAnswer = function createAnswer(successCallback, failureCallback) {
    var options = arguments.length >= 2 ? arguments[2] : arguments[0];
    var promise = origCreateAnswer.apply(this, [options]);
    if (!failureCallback) {
      return promise;
    }
    promise.then(successCallback, failureCallback);
    return Promise.resolve();
  };
  var withCallback = function withCallback(description, successCallback, failureCallback) {
    var promise = setLocalDescription.apply(this, [description]);
    if (!failureCallback) {
      return promise;
    }
    promise.then(successCallback, failureCallback);
    return Promise.resolve();
  };
  prototype.setLocalDescription = withCallback;
  withCallback = function withCallback(description, successCallback, failureCallback) {
    var promise = setRemoteDescription.apply(this, [description]);
    if (!failureCallback) {
      return promise;
    }
    promise.then(successCallback, failureCallback);
    return Promise.resolve();
  };
  prototype.setRemoteDescription = withCallback;
  withCallback = function withCallback(candidate, successCallback, failureCallback) {
    var promise = addIceCandidate.apply(this, [candidate]);
    if (!failureCallback) {
      return promise;
    }
    promise.then(successCallback, failureCallback);
    return Promise.resolve();
  };
  prototype.addIceCandidate = withCallback;
}
function shimGetUserMedia(window) {
  var navigator = window && window.navigator;
  if (navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {
    // shim not needed in Safari 12.1
    var mediaDevices = navigator.mediaDevices;
    var _getUserMedia = mediaDevices.getUserMedia.bind(mediaDevices);
    navigator.mediaDevices.getUserMedia = function (constraints) {
      return _getUserMedia(shimConstraints(constraints));
    };
  }
  if (!navigator.getUserMedia && navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {
    navigator.getUserMedia = function getUserMedia(constraints, cb, errcb) {
      navigator.mediaDevices.getUserMedia(constraints).then(cb, errcb);
    }.bind(navigator);
  }
}
function shimConstraints(constraints) {
  if (constraints && constraints.video !== undefined) {
    return Object.assign({}, constraints, {
      video: utils.compactObject(constraints.video)
    });
  }
  return constraints;
}
function shimRTCIceServerUrls(window) {
  if (!window.RTCPeerConnection) {
    return;
  }
  // migrate from non-spec RTCIceServer.url to RTCIceServer.urls
  var OrigPeerConnection = window.RTCPeerConnection;
  window.RTCPeerConnection = function RTCPeerConnection(pcConfig, pcConstraints) {
    if (pcConfig && pcConfig.iceServers) {
      var newIceServers = [];
      for (var i = 0; i < pcConfig.iceServers.length; i++) {
        var server = pcConfig.iceServers[i];
        if (server.urls === undefined && server.url) {
          utils.deprecated('RTCIceServer.url', 'RTCIceServer.urls');
          server = JSON.parse(JSON.stringify(server));
          server.urls = server.url;
          delete server.url;
          newIceServers.push(server);
        } else {
          newIceServers.push(pcConfig.iceServers[i]);
        }
      }
      pcConfig.iceServers = newIceServers;
    }
    return new OrigPeerConnection(pcConfig, pcConstraints);
  };
  window.RTCPeerConnection.prototype = OrigPeerConnection.prototype;
  // wrap static methods. Currently just generateCertificate.
  if ('generateCertificate' in OrigPeerConnection) {
    Object.defineProperty(window.RTCPeerConnection, 'generateCertificate', {
      get: function get() {
        return OrigPeerConnection.generateCertificate;
      }
    });
  }
}
function shimTrackEventTransceiver(window) {
  // Add event.transceiver member over deprecated event.receiver
  if (_typeof(window) === 'object' && window.RTCTrackEvent && 'receiver' in window.RTCTrackEvent.prototype && !('transceiver' in window.RTCTrackEvent.prototype)) {
    Object.defineProperty(window.RTCTrackEvent.prototype, 'transceiver', {
      get: function get() {
        return {
          receiver: this.receiver
        };
      }
    });
  }
}
function shimCreateOfferLegacy(window) {
  var origCreateOffer = window.RTCPeerConnection.prototype.createOffer;
  window.RTCPeerConnection.prototype.createOffer = function createOffer(offerOptions) {
    if (offerOptions) {
      if (typeof offerOptions.offerToReceiveAudio !== 'undefined') {
        // support bit values
        offerOptions.offerToReceiveAudio = !!offerOptions.offerToReceiveAudio;
      }
      var audioTransceiver = this.getTransceivers().find(function (transceiver) {
        return transceiver.receiver.track.kind === 'audio';
      });
      if (offerOptions.offerToReceiveAudio === false && audioTransceiver) {
        if (audioTransceiver.direction === 'sendrecv') {
          if (audioTransceiver.setDirection) {
            audioTransceiver.setDirection('sendonly');
          } else {
            audioTransceiver.direction = 'sendonly';
          }
        } else if (audioTransceiver.direction === 'recvonly') {
          if (audioTransceiver.setDirection) {
            audioTransceiver.setDirection('inactive');
          } else {
            audioTransceiver.direction = 'inactive';
          }
        }
      } else if (offerOptions.offerToReceiveAudio === true && !audioTransceiver) {
        this.addTransceiver('audio', {
          direction: 'recvonly'
        });
      }
      if (typeof offerOptions.offerToReceiveVideo !== 'undefined') {
        // support bit values
        offerOptions.offerToReceiveVideo = !!offerOptions.offerToReceiveVideo;
      }
      var videoTransceiver = this.getTransceivers().find(function (transceiver) {
        return transceiver.receiver.track.kind === 'video';
      });
      if (offerOptions.offerToReceiveVideo === false && videoTransceiver) {
        if (videoTransceiver.direction === 'sendrecv') {
          if (videoTransceiver.setDirection) {
            videoTransceiver.setDirection('sendonly');
          } else {
            videoTransceiver.direction = 'sendonly';
          }
        } else if (videoTransceiver.direction === 'recvonly') {
          if (videoTransceiver.setDirection) {
            videoTransceiver.setDirection('inactive');
          } else {
            videoTransceiver.direction = 'inactive';
          }
        }
      } else if (offerOptions.offerToReceiveVideo === true && !videoTransceiver) {
        this.addTransceiver('video', {
          direction: 'recvonly'
        });
      }
    }
    return origCreateOffer.apply(this, arguments);
  };
}
function shimAudioContext(window) {
  if (_typeof(window) !== 'object' || window.AudioContext) {
    return;
  }
  window.AudioContext = window.webkitAudioContext;
}