/*
 * Spreed Speak Freely.
 * Copyright (C) 2013-2014 struktur AG
 *
 * This file is part of Spreed Speak Freely.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
define(['jquery', 'underscore'], function($, _) {

  return ["$window", function($window) {

    var mediaSources = function() {

      this.supported = window.MediaStreamTrack && window.MediaStreamTrack.getSources
      this.audio = [];
      this.video = [];

    };

    mediaSources.prototype.refresh = function(cb) {

      if (!this.supported) {
        if (cb) {
            cb([], []);
        }
        return;
      }

      // NOTE(longsleep): Put this in a try/catch to continue with
      // broken implementation like in node-webkit 0.7.2.
      try {
        this._refresh(cb);
      } catch(e) {
        console.error("Failed to get media sources: "+e.message);
        this.supported = false;
        if (cb) {
            cb([], []);
        }
      }

    };

    mediaSources.prototype._refresh = function(cb) {

      MediaStreamTrack.getSources(_.bind(function(sources) {
        var audio = this.audio = [];
        var video = this.video = [];
        _.each(sources, function(source) {
          var o = {id: source.id, facing: source.facing};
          if (source.kind === "audio") {
            o.label = source.label ? source.label : "Microphone " + (audio.length+1);
            audio.push(o);
          } else if (source.kind === "video") {
            o.label = source.label ? source.label : "Camera " + (video.length+1);
            video.push(o);
          }
        });
        if (cb) {
          cb(audio, video);
        }
      }, this));

    };

    mediaSources.prototype.hasAudioId = function(id) {

      var i;
      for (i=0; i<this.audio.length; i++) {
        if (this.audio[i].id === id) {
          return true;
        }
      }
      return false;

    };

    mediaSources.prototype.hasVideoId = function(id) {

      var i;
      for (i=0; i<this.video.length; i++) {
        if (this.video[i].id === id) {
          return true;
        }
      }
      return false;

    };


    return new mediaSources();

  }];

});