/*****************************************************************************
 * 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*/

define([
    'angular',
    '../ui/TreeView'
], function (angular, TreeView) {
    function MCTTree($parse) {
        function link(scope, element, attrs) {
            var treeView = new TreeView(),
                expr = $parse(attrs.mctModel),
                unobserve = treeView.observe(function (domainObject) {
                    if (domainObject !== expr(scope.$parent)) {
                        expr.assign(scope.$parent, domainObject);
                        scope.$apply();
                    }
                });

            element.append(angular.element(treeView.elements()));

            scope.$parent.$watch(attrs.mctModel, treeView.value.bind(treeView));
            scope.$watch('mctObject', treeView.model.bind(treeView));
            scope.$on('$destroy', unobserve);
        }

        return {
            restrict: "E",
            link: link,
            scope: { mctObject: "=" }
        };
    }

    return MCTTree;
});