/**
 * Copyright 2013-2014, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 * @providesModule ReactEventEmitterMixin
 */

"use strict";

var EventPluginHub = require('EventPluginHub');

function runEventQueueInBatch(events) {
  EventPluginHub.enqueueEvents(events);
  EventPluginHub.processEventQueue();
}

var ReactEventEmitterMixin = {

  /**
   * Streams a fired top-level event to `EventPluginHub` where plugins have the
   * opportunity to create `ReactEvent`s to be dispatched.
   *
   * @param {string} topLevelType Record from `EventConstants`.
   * @param {object} topLevelTarget The listening component root node.
   * @param {string} topLevelTargetID ID of `topLevelTarget`.
   * @param {object} nativeEvent Native environment event.
   */
  handleTopLevel: function(
      topLevelType,
      topLevelTarget,
      topLevelTargetID,
      nativeEvent) {
    var events = EventPluginHub.extractEvents(
      topLevelType,
      topLevelTarget,
      topLevelTargetID,
      nativeEvent
    );

    runEventQueueInBatch(events);
  }
};

module.exports = ReactEventEmitterMixin;
