/*****************************************************************************
 * Open MCT, Copyright (c) 2014-2017, United States Government
 * as represented by the Administrator of the National Aeronautics and Space
 * Administration. All rights reserved.
 *
 * Open MCT 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 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.
 *****************************************************************************/

/**
 * Module defining ViewSnapshot
 */

var OVERLAY_TEMPLATE = '' +
        '    <div class="abs blocker"></div>' +
        '    <div class="abs outer-holder">' +
        '       <a class="close icon-x-in-circle"></a>' +
        '       <div class="abs inner-holder l-flex-col">' +
        '           <div class="t-contents flex-elem holder grows"></div>' +
        '           <div class="bottom-bar flex-elem holder">' +
        '               <a class="t-done s-button major">Done</a>' +
        '           </div>' +
        '       </div>' +
        '    </div>';

define([
    'zepto',
    "../../res/templates/snapshotHeader.html"
],
function ($, headerTemplate) {

    var toggleOverlay,
        overlay,
        closeButton,
        doneButton,
        blocker,
        overlayContainer,
        img,
        annotateButton,
        annotateImg;

    function ViewSnapshot($compile) {
        this.$compile = $compile;
    }

    function openOverlay(url, header) {
        overlay = document.createElement('div');
        $(overlay).addClass('abs overlay l-large-view');
        overlay.innerHTML = OVERLAY_TEMPLATE;
        overlayContainer = overlay.querySelector('.t-contents');
        closeButton = overlay.querySelector('a.close');
        closeButton.addEventListener('click', toggleOverlay);
        doneButton = overlay.querySelector('a.t-done');
        doneButton.addEventListener('click', toggleOverlay);
        blocker = overlay.querySelector('.abs.blocker');
        blocker.addEventListener('click', toggleOverlay);
        annotateButton = header.querySelector('a.icon-pencil');
        annotateButton.addEventListener('click', annotateImg);
        document.body.appendChild(overlay);
        img = document.createElement('div');
        $(img).addClass('abs object-holder t-image-holder s-image-holder');
        img.innerHTML = '<div class="image-main s-image-main" style="background-image: url(' + url + ');"></div>';
        overlayContainer.appendChild(header);
        overlayContainer.appendChild(img);
    }

    function closeOverlay() {
        overlayContainer.removeChild(img);
        document.body.removeChild(overlay);
        closeButton.removeEventListener('click', toggleOverlay);
        closeButton = undefined;
        doneButton.removeEventListener('click', toggleOverlay);
        doneButton = undefined;
        blocker.removeEventListener('click', toggleOverlay);
        blocker = undefined;
        overlayContainer = undefined;
        overlay = undefined;
        img = undefined;
    }

    ViewSnapshot.prototype.perform = function ($event, snapshot, embedId, entryId, $scope, embed) {
        var isOpen = false;

        // onclick for menu items in overlay header context menu
        $scope.menuPerform = function (menu) {
            menu.perform();
            closeOverlay();
        };

        // Create the overlay element and add it to the document's body
        $scope.cssClass = embed.cssClass;
        $scope.embedType = embed.type;
        $scope.entryName = embed.name;
        $scope.snapDate = +embedId;
        var element = this.$compile(headerTemplate)($scope);

        var annotateAction = $scope.action.getActions({category: 'embed'})[1];

        toggleOverlay = function () {
            if (!isOpen) {
                openOverlay(snapshot, element[0]);
                isOpen = true;
            } else {
                closeOverlay();
                isOpen = false;
            }
        };

        annotateImg = function () {
            closeOverlay();
            annotateAction.perform($event, snapshot, embedId, entryId, $scope);
        };

        toggleOverlay();
    };

    return ViewSnapshot;
}
);