'use strict';

/**
 * Licensed Materials - Property of IBM
 * IBM Cognos Products: BI Cloud (C) Copyright IBM Corp. 2017
 * US Government Users Restricted Rights - Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
 */

define(['../TransitionController', './TransitionDirector', '../../util/AnimationHelper'], function (BaseClass, TransitionDirector, AnimationHelper) {

	var AnimatedPathSlideShowTransitionController = BaseClass.extend({

		_duration: null,

		_cssOnScreen: {
			display: 'block',
			transform: 'scale(1)',
			position: 'absolute',
			top: '0px',
			bottom: '0px',
			left: '0px',
			right: '0px'
		},

		init: function init(options) {
			AnimatedPathSlideShowTransitionController.inherited('init', this, arguments);
			this._duration = options.duration ? options.duration : 100;
			this._timeline = options.timeline;
		},

		_beforeJump: function _beforeJump(from) {
			this._hideWidgets(from);

			return AnimatedPathSlideShowTransitionController.inherited('_beforeJump', this, arguments);
		},

		_jump: function _jump(from, to) {
			if (from && from.$el) {
				from.$el.css({
					transform: AnimationHelper.SCALE_ZERO
				}).attr('aria-hidden', 'true');
			}

			to.$el.css(this._cssOnScreen).css({ opacity: 1 }).addClass('selected').attr('aria-hidden', 'false');

			return AnimatedPathSlideShowTransitionController.inherited('_jump', this, arguments);
		},

		_afterJump: function _afterJump(from, to) {
			this._showWidgets(to);
			return AnimatedPathSlideShowTransitionController.inherited('_afterJump', this, arguments);
		},

		_beforeNext: function _beforeNext(from, to) {
			return Promise.try(function () {
				this._beforeJump(from, to);
			}.bind(this)).then(function () {
				to.$el.css(this._cssOnScreen).addClass('selected').attr('aria-hidden', 'false');

				return this._transitionWidgets(from, to);
			}.bind(this));
		},

		_next: function _next() {
			return AnimatedPathSlideShowTransitionController.inherited('_next', this, arguments);
		},

		_afterNext: function _afterNext(from, to) {
			from.$el.css({
				transform: AnimationHelper.SCALE_ZERO
			}).attr('aria-hidden', 'true');

			return this._restoreWidgets(from, to).then(this._afterJump.bind(this, from, to));
		},

		_beforePrevious: function _beforePrevious(from, to) {
			return this._beforeJump(from, to);
		},

		_previous: function _previous(from, to) {
			return this._jump(from, to);
		},

		_afterPrevious: function _afterPrevious(from, to) {
			return this._afterJump(from, to);
		},

		_transitionWidgets: function _transitionWidgets(view, target) {
			if (view && view.getLayoutView && target && target.getLayoutView) {
				this._transitionMap = this._timeline.getWidgetTransitionMap(view.getLayoutView(), target.getLayoutView());
				if (this._transitionMap) {
					var fromEvent = {
						current: view,
						to: target,
						linkIdMap: this._transitionMap
					};
					var toEvent = {
						current: target,
						from: view,
						linkIdMap: this._transitionMap
					};
					var layoutView = view.getLayoutView();
					if (layoutView && layoutView.model) {
						var rootLayout = view.getLayoutView().model.getTopLayoutModel();
						var director = new TransitionDirector({ rootLayout: rootLayout });
						var promises = [];
						promises = promises.concat(view.getLayoutView().reduce(director.getOnTransitionCallback(fromEvent)));
						promises = promises.concat(target.getLayoutView().reduce(director.getOnTransitionCallback(toEvent)));
						return Promise.all(promises);
					}
				}
			}
			return Promise.resolve();
		},

		_restoreWidgets: function _restoreWidgets(view, target) {
			if (view && view.getLayoutView && target && target.getLayoutView && this._transitionMap) {

				var fromEvent = {
					current: view,
					to: target,
					linkIdMap: this._transitionMap
				};
				var toEvent = {
					current: target,
					from: view,
					linkIdMap: this._transitionMap
				};
				this._transitionMap = null;

				var layoutView = view.getLayoutView();
				if (layoutView && layoutView.model) {
					var rootLayout = view.getLayoutView().model.getTopLayoutModel();
					var director = new TransitionDirector({ rootLayout: rootLayout });
					var promises = [];
					promises = promises.concat(view.getLayoutView().reduce(director.getAfterTransitionCallback(fromEvent)));
					promises = promises.concat(target.getLayoutView().reduce(director.getAfterTransitionCallback(toEvent)));
					return Promise.all(promises);
				}
			}
			return Promise.resolve();
		}
	});

	return AnimatedPathSlideShowTransitionController;
});
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