/*
 *    Copyright [2015] [wisemapping]
 *
 *   Licensed under WiseMapping Public License, Version 1.0 (the "License").
 *   It is basically the Apache License, Version 2.0 (the "License") plus the
 *   "powered by wisemapping" text requirement on every single page;
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the license at
 *
 *       http://www.wisemapping.org/license
 *
 *   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.
 */
const Command = require('../Command').default;

const AddTopicCommand = new Class(
  /** @lends AddTopicCommand */ {
    Extends: Command,
    /**
         * @classdesc This command class handles do/undo of adding one or multiple topics to
         * the mindmap.
         * @constructs
         * @param {Array<mindplot.model.NodeModel>} models one or multiple models
         * @param {Array<String>} parentTopicsId ids of the parent topics to add the children to, or null
         * when attaching a dragged node or a node/branch from clipboard
         * @extends mindplot.Command
         */
    initialize(models, parentTopicsId) {
      $assert(models, 'models can not be null');
      $assert(
        parentTopicsId == null || parentTopicsId.length == models.length,
        'parents and models must have the same size',
      );

      this.parent();
      this._models = models;
      this._parentsIds = parentTopicsId;
    },

    /**
         * Overrides abstract parent method
         */
    execute(commandContext) {
      const me = this;
      _.each(this._models, (model, index) => {
        // Add a new topic ...
        const topic = commandContext.createTopic(model);

        // Connect to topic ...
        if (me._parentsIds) {
          const parentId = me._parentsIds[index];
          if ($defined(parentId)) {
            const parentTopic = commandContext.findTopics(parentId)[0];
            commandContext.connect(topic, parentTopic);
          }
        } else {
          commandContext.addTopic(topic);
        }

        // Select just created node ...
        const designer = commandContext._designer;
        designer.onObjectFocusEvent(topic);
        topic.setOnFocus(true);

        // Render node ...
        topic.setVisibility(true);
      });
    },

    /**
         * Overrides abstract parent method
         * @see {@link mindplot.Command.undoExecute}
         */
    undoExecute(commandContext) {
      // Delete disconnected the nodes. Create a copy of the topics ...
      const clonedModel = [];
      _.each(this._models, (model) => {
        clonedModel.push(model.clone());
      });

      // Finally, remove the nodes ...
      _.each(this._models, (model) => {
        const topicId = model.getId();
        const topic = commandContext.findTopics(topicId)[0];
        commandContext.deleteTopic(topic);
      });

      this._models = clonedModel;
    },
  },
);

export default AddTopicCommand;