'use strict';

/**
 * Licensed Materials - Property of IBM
 *
 * IBM Cognos Products: BI Cloud
 *
 * (C) Copyright IBM Corp. 2014, 2017
 *
 * US Government Users Restricted Rights - Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
 */
define(['../../lib/@waca/core-client/js/core-client/ui/core/Events'], function (Events) {

	var SelectionModel = null;

	/**
  * This class provides Selection Model (API).
  */
	SelectionModel = Events.extend({
		_bSelectionModeOn: false,

		init: function init() {
			SelectionModel.inherited('init', this, arguments);
		},

		inSelectionMode: function inSelectionMode() {
			return this._bSelectionModeOn;
		},

		/**
   * Usually invoked by user gesture handler on data view
   *
   * This fires SelectionModeOn event.
   * Usually a controller listens it and invokes contextbar.show
   */
		turnOnSelectionMode: function turnOnSelectionMode(event) {
			this._bSelectionModeOn = true;
			this.trigger('selectionMode:ON', { 'payload': event });
		},

		/**
   * Usually invoked by user gesture handler on data view
   *
   * This fires SelectionModeOn event.
   * Usually a controller listens it and invokes contextbar.hide
   */
		turnOffSelectionMode: function turnOffSelectionMode(event) {
			this._bSelectionModeOn = false;
			this.trigger('selectionMode:OFF', { 'payload': event });
		},

		/**
   * Usually invoked by controller
   * i.e) user clicks close button on context bar
   */
		stopSelectionMode: function stopSelectionMode() {
			this._bSelectionModeOn = false;
			this.unselectAll();
		},

		/**
   * Usually invoked by controller
   * i.e) user clicks multi-select button on context bar
   */
		startSelectionMode: function startSelectionMode() {
			this._bSelectionModeOn = true;
			this.unselectAll();
		},

		/*
   * abstracts functions
   */
		getSelections: function getSelections() {
			return [];
		},
		unselectAll: function unselectAll() {
			return;
		}

	});

	return SelectionModel;
});
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