/*****************************************************************************
 * Open MCT Web, Copyright (c) 2014-2015, United States Government
 * as represented by the Administrator of the National Aeronautics and Space
 * Administration. All rights reserved.
 *
 * Open MCT Web is licensed under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0.
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 *
 * Open MCT Web includes source code licensed under additional open source
 * licenses. See the Open Source Licenses file (LICENSES.md) included with
 * this source code distribution or the Licensing information page available
 * at runtime from the About dialog for additional information.
 *****************************************************************************/
/*global define,Promise*/

/**
 * Module defining ContextMenuGesture. 
 * Created by vwoeltje on 11/17/14. Modified by shale on 06/30/2015.
 */
define(
    function () {
        "use strict";

        /**
         * Add listeners to a representation such that it calls the
         * context menu action for the domain object it contains.
         *
         * @constructor
         * @param element the jqLite-wrapped element which should exhibit
         *                the context mennu
         * @param {DomainObject} domainObject the object on which actions
         *                       in the context menu will be performed
         */
        function ContextMenuGesture($timeout, agentService, element, domainObject) {
            var actionContext,
                stop,
                isPressing,
                longTouchTime = 500;
            
            // When context menu event occurs, show object actions instead
            if (!agentService.isMobile(navigator.userAgent)) {
                element.on('contextmenu', function (event) {
                    actionContext = {key: 'menu', domainObject: domainObject, event: event};
                    stop = domainObject.getCapability('action').perform(actionContext);
                });
            } else if (agentService.isMobile(navigator.userAgent)) {
                // If on mobile device, then start timeout for the single touch event
                // during the timeout 'isPressing' is true.
                element.on('touchstart', function (event) {
                    if (event.touches.length < 2) {
                        isPressing = true;
                        // After the timeout, if 'isPressing' is
                        // true, display context menu for object
                        $timeout(function () {
                            if (isPressing) {
                                actionContext = {key: 'menu', domainObject: domainObject, event: event};
                                stop = domainObject.getCapability('action').perform(actionContext);
                            }
                        }, longTouchTime);
                    }
                });
                // Whenever the touch event ends, 'isPressing' is false.
                element.on('touchend', function (event) {
                    isPressing = false;
                });
            }

            return {
                /**
                 * Detach any event handlers associated with this gesture.
                 * @method
                 * @memberof ContextMenuGesture
                 */
                destroy: function () {
                    element.off('contextmenu', stop);
                }
            };
        }

        return ContextMenuGesture;
    }
);