'use strict';

/**
 * Licensed Materials - Property of IBM
 * IBM Cognos Products: Storytelling
 * (C) Copyright IBM Corp. 2017, 2020
 * US Government Users Restricted Rights - Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
 */

define(['baglass/core-client/js/core-client/ui/core/View', 'jquery', 'gemini/app/util/ScreenReaderUtil', 'storytelling-ui/storytelling-ui.min', 'text!./templates/TimelineHighlightIndicatorView.html', 'dashboard-analytics/visualizations/renderer/filter/FilterLabelHelper', './highlight/TimelineHighlightFlyoutController', 'react', 'react-dom', '../util/WidgetHelper'], function (View, $, ScreenReaderUtil, StorytellingUI, Template, FilterLabelHelper, TimelineHighlightFlyoutController, React, ReactDOM, WidgetHelper) {

	var Indicator = View.extend({
		templateString: Template,

		//@override
		/**
   * @param options.$el {object} - JQuery node to append the highlight HTML
   * @param options.widgetId {string} - the widget Id of the selected timeline widget
   * @param options.scaleManager {object} - scaleManager of the timeline
   * @param options.episodeModel {object} - episodeModel of the selected timeline widget
   * @param options.highlightAct {object} - optional, the existing highlightAct model
   */
		init: function init(options) {
			Indicator.inherited('init', this, arguments);
			this.controller = options.controller;
			this.widgetId = options.widgetId;
			this.scaleManager = options.scaleManager;
			this.episodeModel = options.episodeModel;
			this.highlightAct = options.highlightAct;
			this.id = options.highlightAct.id;
			this.services = options.services;
			this.dashboardApi = options.dashboardApi;

			this.widgetHelper = new WidgetHelper({ dashboardApi: this.dashboardApi });
			this.widget = this.widgetHelper.getWidget(this.widgetId);
			this.content = this.widgetHelper.getContent(this.widgetId);

			if (this.widget && this.content) {
				this.visualization = this.content.getFeature('Visualization');
				this.filterLabelHelper = new FilterLabelHelper({
					dataSource: this.visualization.getDataSource(),
					dashboardApi: this.dashboardApi
				});
			}

			this.pageContextAPI = this.controller.model.pageContext.getAPI();
			this.extraCssClass = options.extraCssClass || '';
			this._ScreenReader = new ScreenReaderUtil();

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

			this.flyoutHolder = document.createElement('div');
			this.flyoutHolder.classList.add('flyout-holder');
		},

		render: function render() {
			var label = this._getTooltipLabel();

			this.el.id = 'timelineHighlight_' + this.id;
			this.el.setAttribute('role', 'application');
			this.el.className = 'timelineHighlight ' + this.extraCssClass;
			this.el.setAttribute('tabindex', '0');
			this.el.dataset.selector = 'true';
			this.el.dataset.id = this.id;
			if (label) {
				this.el.setAttribute('aria-label', label);
				this.el.setAttribute('title', label);
			}

			var sHtml = this.dotTemplate({
				id: this.id
			});
			this.$el.html(sHtml);

			this._indicatorWidth = this.$el.outerWidth();
			this._handleWidth = this.$el.closest('.sliderContent').find('.handle').outerWidth();

			// here we assume that timer is inside the widget since it's the persisted value;
			this._updateHighlightPosition(this.highlightAct.timer, false);
			this._updateHighlightState();
			this._registerEvents();
		},

		remove: function remove() {
			this._unregisterEvents();
			Indicator.inherited('remove', this, arguments);
		},

		onSliderChange: function onSliderChange() {
			this._updateHighlightPosition(this.highlightAct.timer, false);
		},
		onScaleChange: function onScaleChange() {
			this._updateHighlightPosition(this.highlightAct.timer, false);
		},

		onPayloadChange: function onPayloadChange() {
			this._updateHighlightState();
			this._updateTooltipLabel();
		},

		_updateHighlightState: function _updateHighlightState() {
			if (this.highlightAct.get('payload').filter(function (item) {
				return item.operator;
			}).length) {
				this.$el.removeClass('empty');
			} else {
				this.$el.addClass('empty');
			}
		},

		_updateHighlightPosition: function _updateHighlightPosition(time, isDragging) {
			// round to the nearest tick for display
			var tick = this.controller.getTickDuration();
			time = Math.round(time / tick) * tick;

			var position = this.scaleManager.convertTimeToPosition(time);
			// the center of the icon on the time
			position -= this._indicatorWidth / 2;

			// if we are dragging we allow the indicator to be over the handles.
			if (!isDragging) {
				position = this._limitPositionToInsideHandles(position);
			}
			this.$el.css('left', position + 'px');
			return position;
		},

		launchHighlightSummaryDialog: function launchHighlightSummaryDialog() {
			this.flyoutView = new TimelineHighlightFlyoutController({
				dashboardApi: this.dashboardApi,
				content: this.content,
				visualization: this.visualization,
				pageContextAPI: this.pageContextAPI,
				services: this.services,
				highlightAct: this.highlightAct,
				launchView: this,
				show: this.launchHighlightSummaryDialog,
				launchPoint: this.$el.get(0)
			});

			this.$el.append(this.flyoutHolder);
			this._flyout = React.createElement(StorytellingUI.HighlightSummaryFlyout, {
				anchorElement: this.$el.get(0),
				closeFlyout: this.closeFlyout.bind(this),
				itemActions: this.flyoutView.getItemActions(),
				title: this.stringResources.get('timelineHighlightTitle')
			});
			ReactDOM.render(this._flyout, this.flyoutHolder);
		},

		getPlacement: function getPlacement() {
			return 'top';
		},

		_registerEvents: function _registerEvents() {
			this._dragStartCallback = this._onDragStart.bind(this);
			this._dragLeftRightCallback = this._onDragLeftRight.bind(this);
			this._dragEndCallback = this._onDragEnd.bind(this);
			this._clickCallback = this._onClick.bind(this);
			this._onKeyPressCallback = this._onKeyPress.bind(this);
			this.$el.hammer({ correct_for_drag_min_distance: false }).on('dragstart', this._dragStartCallback).on('dragleft', this._dragLeftRightCallback).on('dragright', this._dragLeftRightCallback).on('dragend', this._dragEndCallback);
			this.$el.find('.svgIcon').on('primaryaction', this._clickCallback);
			this.$el.on('keydown', this._onKeyPressCallback);
		},

		setTime: function setTime(value) {
			this._updateHighlightPosition(value, false);
		},

		_unregisterEvents: function _unregisterEvents() {
			if (this._flyout) {
				this.closeFlyout();
			}

			if (this.$el) {
				this.$el.off('dragstart', null, this._dragStartCallback).off('dragleft', null, this._dragLeftRightCallback).off('dragright', null, this._dragLeftRightCallback).off('dragend', null, this._dragEndCallback);
				this.$el.find('.svgIcon').off('primaryaction', this._clickCallback);
				this.$el.off('keydown', this._onKeyPressCallback);
			}
		},

		_onDragLeftRight: function _onDragLeftRight(event) {
			if (event.gesture) {
				event.gesture.preventDefault();
				event.gesture.stopPropagation();

				var position = this._positionFromLeft + event.gesture.deltaX;
				var time = this.scaleManager.convertPositionToTime(position);
				time = this._limitTimerToSlider(time);
				this._updateHighlightPosition(time, true);
			}
		},

		_onDragEnd: function _onDragEnd(event) {
			if (event.gesture) {
				event.gesture.stopPropagation();
				this.controller.trigger('timeline:highlightIndicatorDragEnded');

				var position = this._positionFromLeft + event.gesture.deltaX;
				var time = this.scaleManager.convertPositionToTime(position);
				time = this._limitTimerToSlider(time);

				this._updateHighlightPosition(time, false);
				this.controller.updateTimelineHighlight(this.widgetId, this.id, { timer: time });
			}
			this._dragEnd = true;
		},

		_onDragStart: function _onDragStart() {
			this.closeFlyout();
			this.controller.trigger('timeline:highlightIndicatorDragStarted', this.widgetId);

			var position = this.scaleManager.convertTimeToPosition(this.highlightAct.timer);
			// the user drags the icon around so we make sure the icon is over the mouse by clamping it to inside the handles
			// this means that if the timer value was zero and the user moves 1 pixel it could be something like 200 depending on the scale
			// but nothing stops the user from dragging it back to zero.
			this._positionFromLeft = this._limitPositionToInsideHandles(position);
		},

		_updateTooltipLabel: function _updateTooltipLabel() {
			var label = this._getTooltipLabel();
			if (label !== this.$el.attr('title')) {
				this.$el.attr('title', label);
				this.$el.attr('aria-label', label);
			}
		},

		_getTooltipLabel: function _getTooltipLabel() {
			var _this = this;

			var label = this.stringResources.get('timelineHighlightTitle');

			if (this.filterLabelHelper) {
				var filterItems = this.filterLabelHelper.generateFilterListItems(this.highlightAct.payload);
				filterItems.forEach(function (filter) {
					label += '\n';
					label += _this.stringResources.get('filter_tooltip', {
						title: filter.title,
						description: filter.description
					});
				});
			}

			return label;
		},

		_onClick: function _onClick(event) {
			if (event.type === 'click' && this._dragEnd) {
				// Hammer will trigger a ghostclick event after dragend in Firefox
				this._dragEnd = false;
				return;
			}
			event.stopPropagation();
			event.preventDefault();
			if (!this.visAPI) {
				// widget has not been loaded. return
				var widget = this.widgetHelper.getWidget(this.widgetId);
				var content = this.widgetHelper.getContent(this.widgetId);
				if (!widget || !content) {
					return;
				} else {
					this.visAPI = widget.getVisApi && widget.getVisApi();
					this.visualization = content.getFeature('Visualization');
				}
			}

			this.$el.append(this.flyoutHolder);
			var flyout = React.createElement(StorytellingUI.HighlightFlyout, {
				widgetId: this.widgetId,
				actId: this.id,
				controller: this.controller,
				anchorElement: this.$el.get(0),
				closeFlyout: this.closeFlyout.bind(this),
				openSummaryDialog: this.launchHighlightSummaryDialog.bind(this)
			});
			ReactDOM.render(flyout, this.flyoutHolder);
		},

		_onKeyPress: function _onKeyPress(event) {
			var $target = $(event.currentTarget);
			// Set as selected
			$target.focus();

			// Setup the number of pixels to move based on arrow key pressed
			var xMoveBy = 0;
			switch (event.keyCode) {
				case 13:
				case 32:
					//Return or Space launches Flyout ODT
					this._onClick(event);
					return;
				case 37:
					//Left
					xMoveBy = this.scaleManager.convertPositionToTime(-20);
					break;
				case 39:
					//Right
					xMoveBy = this.scaleManager.convertPositionToTime(20);
					break;
				case 38:
				case 40:
					event.stopPropagation();
					event.preventDefault();
					return;
				default:
					return;
			}

			event.stopPropagation();
			event.preventDefault();

			//Moving from the current position.
			var time = this._limitTimerToSlider(this.highlightAct.timer + xMoveBy);
			this._updateHighlightPosition(time, false);

			this.controller.updateTimelineHighlight(this.widgetId, this.id, { timer: time });
			var messageOptions = {
				id: this.id,
				time: time
			};
			var sMessage = this.stringResources.get('timeline_highlight_moved_to', messageOptions);
			this._ScreenReader.callOut(sMessage);
		},

		_limitTimerToSlider: function _limitTimerToSlider(timerValue) {
			timerValue = Math.max(timerValue, this.episodeModel.getEntranceAct().timer + 1);
			timerValue = Math.min(timerValue, this.episodeModel.getExitAct().timer - 1);
			return timerValue;
		},

		_limitPositionToInsideHandles: function _limitPositionToInsideHandles(position) {

			var entranceTime = this.episodeModel.getEntranceAct().timer;
			var min = this.scaleManager.convertTimeToPosition(entranceTime);
			min += this._handleWidth;

			var exitTime = this.episodeModel.getExitAct().timer;
			var max = this.scaleManager.convertTimeToPosition(exitTime);
			max -= this._handleWidth + this._indicatorWidth;

			position = Math.min(position, max);
			position = Math.max(position, min);

			// if there is not enough space between the handles we split the difference.
			var contentWidth = this.scaleManager.convertTimeToPosition(exitTime - entranceTime - this._handleWidth * 2);
			if (contentWidth < this._indicatorWidth) {
				position -= (this._indicatorWidth - contentWidth) / 2;
			}
			return position;
		},

		closeFlyout: function closeFlyout() {
			ReactDOM.unmountComponentAtNode(this.flyoutHolder);
			this.$el.find('.flyout-holder').remove();
		}
	});

	return Indicator;
});
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