/**
 * Copyright (c) 2016-present, 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.
 *
 * Facebook, Inc. ("Facebook") owns all right, title and interest, including
 * all intellectual property and other proprietary rights, in and to the React
 * Native CustomComponents software (the "Software").  Subject to your
 * compliance with these terms, you are hereby granted a non-exclusive,
 * worldwide, royalty-free copyright license to (1) use and copy the Software;
 * and (2) reproduce and distribute the Software as part of your own software
 * ("Your Software").  Facebook reserves all rights not expressly granted to
 * you in this license agreement.
 *
 * THE SOFTWARE AND DOCUMENTATION, IF ANY, ARE PROVIDED "AS IS" AND ANY EXPRESS
 * OR IMPLIED WARRANTIES (INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE) ARE DISCLAIMED.
 * IN NO EVENT SHALL FACEBOOK OR ITS AFFILIATES, OFFICERS, DIRECTORS OR
 * EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THE SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * @providesModule TVEventHandler
 * @flow
 */
'use strict';

const React = require('React');
const TVNavigationEventEmitter = require('NativeModules').TVNavigationEventEmitter;
const NativeEventEmitter = require('NativeEventEmitter');

function TVEventHandler() {
  this.__nativeTVNavigationEventListener = null;
  this.__nativeTVNavigationEventEmitter = null;
}

TVEventHandler.prototype.enable = function(component: ?any, callback: Function) {
  if (!TVNavigationEventEmitter) {
    return;
  }

  this.__nativeTVNavigationEventEmitter = new NativeEventEmitter(TVNavigationEventEmitter);
  this.__nativeTVNavigationEventListener = this.__nativeTVNavigationEventEmitter.addListener(
    'onTVNavEvent',
    (data) => {
      if (callback) {
        callback(component, data);
      }
    }
  );
};

TVEventHandler.prototype.disable = function() {
  if (this.__nativeTVNavigationEventListener) {
    this.__nativeTVNavigationEventListener.remove();
    delete this.__nativeTVNavigationEventListener;
  }
  if (this.__nativeTVNavigationEventEmitter) {
    delete this.__nativeTVNavigationEventEmitter;
  }
};

module.exports = TVEventHandler;