'use strict';

/**
 * Licensed Materials - Property of IBM
 * IBM Cognos Products: Storytelling (C) Copyright IBM Corp. 2015, 2019
 * US Government Users Restricted Rights - Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
 */

define(['gemini/dashboard/layout/views/PageCollectionView', 'jquery', 'underscore', '../../StoryService'], function (PageCollectionView, $, _, StoryService) {

	/**
  * An interface for classes that represent the layout for a story.
  * Implementing classes are required to create and instaniate a property named '_pageNavigationController'
  * @interface
  */

	var BLACKLISTED_PROPERTIES = ['layoutPositioning'];

	var TABSTOP_SELECTOR = ['button', 'input', 'select', 'textarea']
	// 'not' to exclude: tabindex < 0 || tabindex > 0 || none
	.map(function (s) {
		return s + ':not([tabindex])';
	}).concat(['[tabindex="0"]']).join();

	var SceneLayout = PageCollectionView.extend({

		init: function init(options) {
			var _this = this;

			SceneLayout.inherited('init', this, arguments);
			this._tabstops = [];
			this._scenes = [];
			this.sceneId = options.appSettings && options.appSettings.sceneId || null;

			this.dashboardApi = options.dashboardApi;
			this.stringResources = this.dashboardApi.getDashboardCoreSvc('.StringResources');

			// TODO: this.eventRouter will work as it is set in dashboard-core/LayoutBaseView which this class is extended from
			this.dashboardApi.getDashboardCoreSvc('.LifeCycleManager').registerLifeCycleHandler('scene:select', this.onSceneSelected.bind(this));
			this.dashboardApi.getDashboardCoreSvc('.LifeCycleManager').registerLifeCycleHandler('scene:next', this.onNextScene.bind(this));
			this.dashboardApi.getDashboardCoreSvc('.LifeCycleManager').registerLifeCycleHandler('scene:previous', this.onPreviousScene.bind(this));
			this.layoutController.eventRouter.on('scene:jump', this.onJumpScene, this);

			this.layoutController.layoutReady(this.model.id).then(function () {
				_this.onLayoutReady();
			});

			this.sceneLayoutApi = {
				getAdjacentScenes: this._getAdjacentScenes.bind(this),
				getCurrentScene: this._getCurrentScene.bind(this),
				getNextScene: this._getNextScene.bind(this),
				getPreviousScene: this._getPreviousScene.bind(this),
				getSceneById: this._getSceneById.bind(this),
				getSceneByIndex: this._getSceneByIndex.bind(this),
				getSceneIndex: this._getSceneIndex.bind(this),
				getScenes: this._getScenes.bind(this)
			};
		},

		destroy: function destroy() {
			this._scenes = [];
			this._tabstops = [];
			this.layoutController.eventRouter.off('scene:jump', this.onJumpScene, this);

			SceneLayout.inherited('destroy', this, arguments);
		},

		onLayoutReady: function onLayoutReady() {
			_.each(this.model.items, this._addScene.bind(this));
		},

		getSceneLayoutApi: function getSceneLayoutApi() {
			return this.sceneLayoutApi;
		},
		extendApi: function extendApi(additionalApiMethods) {
			_.each(additionalApiMethods, function (apiMethod, key) {
				this.sceneLayoutApi[key] = apiMethod;
			}.bind(this));
		},

		_hasScene: function _hasScene(model) {
			var sceneId = this._getSceneId(model);
			var scene = _.findWhere(this._scenes, {
				id: sceneId
			});
			return scene ? true : false;
		},

		_addScene: function _addScene(model) {
			this._scenes.push(this._makeSceneInstance(model));
		},

		/**
   * @returns {Promise}
   */
		_removeScene: function _removeScene(model) {
			var _this2 = this;

			var remove = this._getScene(model);
			var removeIndex = this._getSceneIndex(model);

			// Always try to go to the next scene first
			var sibling = this._scenes[removeIndex + 1];
			if (!sibling) {
				// If removing the last scene we go to the previous scene
				sibling = this._scenes[removeIndex - 1];
			}

			this._scenes = _.without(this._scenes, remove);

			// at this point the view is out of the DOM
			this._tabstops = this._tabstops.filter(function (node) {
				if (!_this2.$el[0].contains(node)) {
					// lets restore the tabindex giving up our node reference.
					node.setAttribute('tabindex', '0');
					return false;
				}
				return true;
			});

			return this.didRemovePage({
				modelId: this.sceneId !== model.id ? this.sceneId : sibling.id
			});
		},

		/**
   * @param {Object} model The layout model of a scene
   */
		_makeSceneInstance: function _makeSceneInstance(model) {
			return {
				id: model.id,
				$el: this.$el.find('#' + this._getViewId(model.id)),
				getLayoutView: this.layoutController.getLayoutView.bind(this.layoutController, model.id),
				getLayoutViewWhenReady: this.layoutController.getLayoutViewWhenReady.bind(this.layoutController, model.id)
			};
		},

		/**
   * @param {Object} model The layout model of the scene being moved
   * @param {String} [beforeId] A string that represents the scene's new imediate sibling's DOM element
   */
		_updateSceneList: function _updateSceneList(model, beforeId) {
			// Get the id of scene AND remove it from list of scenes
			var sceneId = this._getSceneId(model);
			var scene = _.findWhere(this._scenes, { id: sceneId });
			this._scenes = _.without(this._scenes, scene);

			// Set the index to reinsert the scene at to the end of the list
			var index = this._scenes.length;

			// If we are moving the scene beside another scene then we need to find where
			if (beforeId) {
				var beforeSceneData = _.findWhere(this._scenes, { id: beforeId });
				// update index value to reinsert scene at a specific location
				index = _.indexOf(this._scenes, beforeSceneData);
			}

			// Update the list of scenes. Place the moved scene in the proper position
			this._scenes.splice(index, 0, this._makeSceneInstance(model));
		},

		_getScenes: function _getScenes() {
			return this._scenes;
		},

		/**
   * @param {Object} model The model of a scene (actual layout model or the runtime model version)
   * @returns {Object} The runtime version of a scene
   */
		_getScene: function _getScene(model) {
			return this._getSceneById(model.id);
		},

		_getAdjacentScenes: function _getAdjacentScenes(scene) {
			var scenes = [];

			var before = this._getPreviousScene(scene);
			var after = this._getNextScene(scene);

			if (before && before !== scene) {
				scenes.push(before);
			}
			if (after && after !== scene) {
				scenes.push(after);
			}

			return scenes;
		},

		_getCurrentScene: function _getCurrentScene() {
			return this._getSceneById(this.sceneId);
		},

		_getCurrentSceneIndex: function _getCurrentSceneIndex() {
			return this._getSceneIndexById(this.sceneId);
		},

		_getNextScene: function _getNextScene(scene) {
			var sceneIndex = this._getCurrentSceneIndex();
			if (scene && scene.id !== this.sceneId) {
				sceneIndex = this._getSceneIndex(scene);
			}

			if (sceneIndex >= 0 && sceneIndex < this._scenes.length - 1) {
				return this._getSceneByIndex(sceneIndex + 1);
			} else if (sceneIndex === this._scenes.length - 1) {
				return this._getSceneByIndex(0);
			}

			return null;
		},

		_getPreviousScene: function _getPreviousScene(scene) {
			var sceneIndex = this._getCurrentSceneIndex();
			if (scene && scene.id !== this.sceneId) {
				sceneIndex = this._getSceneIndex(scene);
			}

			if (sceneIndex > 0 && sceneIndex < this._scenes.length) {
				return this._getSceneByIndex(sceneIndex - 1);
			} else if (sceneIndex === 0) {
				return this._getSceneByIndex(this._scenes.length - 1);
			}

			return null;
		},

		_getSceneById: function _getSceneById(sceneId) {
			var scene = this._scenes.filter(function (scene) {
				return scene.id === sceneId;
			});
			return scene[0] || null;
		},

		/**
   *
   * @param {String} sceneId This is either the model Id or the scene'e element Id in the DOM
   * @returns {Number} The array index value or -1 if the scene was not found
   */
		_getSceneIndexById: function _getSceneIndexById(sceneId) {
			for (var i = 0; i < this._scenes.length; i++) {
				if (this._scenes[i].id === sceneId) {
					return i;
				}
			}

			return -1;
		},

		/**
   *
   * @param layoutModel layout model to get the scene index from
   * @returns the index or -1 if the model was not found
   */
		_getSceneIndex: function _getSceneIndex(model) {
			return this._getSceneIndexById(model.id);
		},

		_getSceneByIndex: function _getSceneByIndex(index) {
			if (index > -1 && index < this._scenes.length) {
				return this._scenes[index];
			}

			return null;
		},

		_getSceneId: function _getSceneId(model) {
			return model.id;
		},

		_getViewId: function _getViewId(modelId) {
			return modelId + '_tab';
		},

		/**
   * @param {String} modelId The scene's id
   * @returns {Promise}
   */
		_selectScene: function _selectScene(modelId) {
			return this.dashboardApi.getDashboardCoreSvc('.LifeCycleManager').invokeLifeCycleHandlers('scene:select', { modelId: modelId });
		},

		/**
   * @returns {Promise}
   */
		didRemovePage: function didRemovePage(options) {
			return this.onJumpScene(options);
		},

		// Overridden in authoring view
		onPlaybackNext: function onPlaybackNext() {
			this.layoutController.eventRouter.trigger('playback:next');
			return this;
		},

		// Overridden in authoring view
		onPlaybackPrevious: function onPlaybackPrevious() {
			this.layoutController.eventRouter.trigger('playback:prev');
			return this;
		},

		/**
   * @param {Object} event The object that is provided when triggering the scene:select event on the layout controller's eventRouter
   * @returns {Promise}
   */
		onSceneSelected: function onSceneSelected(event) {
			var _this3 = this;

			return this._pageNavigationController.jumpTo(_.extend(event, { onTargetSelected: this._navigationStarted.bind(this) })).then(function (results) {
				_this3._navigationComplete(_.extend(results, { play: event ? event.play : null }));
			});
		},

		/**
   * This method is only called when the eventRouter has had the "scene:next" event triggered
   * @returns {Promise}
   */
		onNextScene: function onNextScene(event) {
			var _this4 = this;

			return this._pageNavigationController.nextPage(_.extend({}, event, { onTargetSelected: this._navigationStarted.bind(this) })).then(function (results) {
				_this4._navigationComplete(_.extend(results, { play: event ? event.play : null }));
			});
		},

		/**
   * This method is only called when the eventRouter has had the "scene:previous" event triggered
   * @returns {Promise}
   */
		onPreviousScene: function onPreviousScene(event) {
			var _this5 = this;

			return this._pageNavigationController.previousPage(_.extend({}, event, { onTargetSelected: this._navigationStarted.bind(this) })).then(function (results) {
				_this5._navigationComplete(_.extend(results, { play: event ? event.play : null }));
			});
		},

		/**
   * @returns {Promise}
   */
		onJumpScene: function onJumpScene(event) {
			var _this6 = this;

			return this._pageNavigationController.jumpTo(_.extend({}, event, { onTargetSelected: this._navigationStarted.bind(this) })).then(function (results) {
				_this6._navigationComplete(_.extend(results, { play: event ? event.play : null }));
			});
		},

		_navigationStarted: function _navigationStarted(event) {
			this._navigationUpdated(event, 'navigation:started');
		},

		_navigationComplete: function _navigationComplete(event) {
			this._navigationUpdated(event, 'navigation:complete');
			this.currentSceneChanged();
		},

		_updateTabStops: function _updateTabStops() {
			// backup enabled tabstops
			var tabstops = [];
			this._scenes.forEach(function (scene) {
				var el = scene.$el[0].querySelector('.page.pagecontainer');
				var nodes = el ? el.querySelectorAll(TABSTOP_SELECTOR) : [];
				// can't use NodeList.forEach because of IE.
				// it's also faster so ok...
				for (var i = 0; i < nodes.length; i++) {
					tabstops.push(nodes[i]);
				}
			});

			this._tabstops = this._tabstops.concat(tabstops);
			this._tabstops = _.uniq(this._tabstops);

			var scene = this._getCurrentScene();
			var sceneEl = scene && scene.$el.length ? scene.$el[0] : null;
			this._tabstops.forEach(function (node) {
				if (sceneEl && sceneEl.contains(node)) {
					node.setAttribute('tabindex', '0');
				} else {
					node.setAttribute('tabindex', '-1');
				}
			});
		},

		_navigationUpdated: function _navigationUpdated(event, type) {
			// Update the current scene
			this.sceneId = event.scene.id;
			var targetIndex = this._getCurrentSceneIndex();

			var payload = {
				index: targetIndex, // This is still needed for StoryPaneController
				scene: event.scene,
				overview: event.overview || targetIndex < 0,
				play: event.play
			};
			this.layoutController.eventRouter.trigger(type, payload);
		},

		/**
   * called when the current scene changes for any reason
   */
		currentSceneChanged: function currentSceneChanged() {
			this._updateTabStops();
		},

		/**
   * START OF DOUBLE DELEGATION SECTION - DO NOT REMOVE
   *
   * Double delegation is needed as methods may get overridden when moving to authoring mode.
   * The event handlers registering these methods in consume view will need to invoke the overridden
   * method that comes from authoring view
   */
		_onPlaybackNext: function _onPlaybackNext() {
			return this.onPlaybackNext();
		},
		_onPlaybackPrevious: function _onPlaybackPrevious() {
			return this.onPlaybackPrevious();
		},
		_onKeyDown: function _onKeyDown(event) {
			return this.onKeyDown(event);
		},
		/**
   * END OF DOUBLE DELEGATION SECTION
   */

		getBannerProperty: function getBannerProperty() {
			return {
				'value': this.stringResources.get('storyProperties'),
				'name': 'banner',
				'type': 'Banner',
				'editable': false
			};
		},

		getProperties: function getProperties() {
			var _this7 = this;

			return SceneLayout.inherited('getProperties', this, arguments).then(function (properties) {
				properties = properties.filter(function (property) {
					return BLACKLISTED_PROPERTIES.indexOf(property.id) === -1;
				});
				properties.push(_this7._getConvertProperty());
				return properties;
			});
		},

		_getConvertProperty: function _getConvertProperty() {
			var _this8 = this;

			var panAndZoomItems = [{
				name: 'panAndZoom1',
				label: this.stringResources.get('PanAndZoomLayout1'),
				type: 'svg',
				value: 'dashboard-guidedjourney1_32'
			}, {
				name: 'panAndZoom2',
				label: this.stringResources.get('PanAndZoomLayout2'),
				type: 'svg',
				value: 'dashboard-guidedjourney2_32'
			}, {
				name: 'panAndZoom3',
				label: this.stringResources.get('PanAndZoomLayout3'),
				type: 'svg',
				value: 'dashboard-guidedjourney3_32'
			}, {
				name: 'panAndZoom4',
				label: this.stringResources.get('PanAndZoomLayout4'),
				type: 'svg',
				value: 'dashboard-guidedjourney4_32'
			}, {
				name: 'panAndZoom5',
				label: this.stringResources.get('PanAndZoomLayout5'),
				type: 'svg',
				value: 'dashboard-guidedjourney5_32'
			}, {
				name: 'panAndZoom6',
				label: this.stringResources.get('PanAndZoomLayout6'),
				type: 'svg',
				value: 'dashboard-timesequence_32'
			}];

			var collapsiblePickerSelectedName = void 0;
			var currentLayout = this.model.get('type') || 'slideshow';
			if (currentLayout.indexOf('panAndZoom') != -1) {
				var index = currentLayout.substring(currentLayout.length - 1, currentLayout.length) - 1;
				currentLayout = currentLayout.substring(0, currentLayout.length - 1);
				collapsiblePickerSelectedName = panAndZoomItems[index].name;
			}

			var dropDownOptions = {
				'name': 'storyType',
				'label': this.stringResources.get('storyTypeLabel'),
				'defaultValue': currentLayout,
				'options': [{
					label: this.stringResources.get('slideshowLabel'),
					value: 'slideshow'
				}, {
					label: this.stringResources.get('panAndZoomLabel'),
					value: 'panAndZoom'
				}]
			};

			var collapsiblePickerOptions = {
				'type': 'CollapsiblePicker',
				'id': 'layoutModel',
				'name': 'layoutModel',
				'label': this.stringResources.get('layoutLabel'),
				'selectedName': collapsiblePickerSelectedName,
				'placeholder': {
					name: '',
					label: '',
					type: 'svg',
					value: 'dashboard-unknown_16'
				},
				'contentSize': 'large',
				'items': panAndZoomItems,
				'isRequired': true
			};

			return {
				'type': 'TwoStageCombo',
				'name': 'storyToStoryControl',
				'id': 'storyToStoryCombo',
				'sectionName': this.stringResources.get('scenesPropertiesSection'),
				'sectionOpened': true,
				'tabName': this.stringResources.get('tabName_general'),
				'dropDownOptions': dropDownOptions,
				'collapsiblePickerOptions': [null, collapsiblePickerOptions],
				'onChange': function onChange(name, propertyValue) {
					var value = propertyValue;
					if (propertyValue && propertyValue.name) {
						value = value.name;
					}
					var storyService = new StoryService({
						dashboardApi: _this8.dashboardApi
					});
					storyService.updateStory({
						boardModel: _this8.model.boardModel,
						targetInfo: {
							type: value
						}
					});
				}
			};
		}
	});

	return SceneLayout;
});
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