/*
 * Licensed Materials - Property of IBM
 * 
 * IBM Cognos Products: SHARE
 * 
 * (C) Copyright IBM Corp. 2015, 2016
 * 
 * US Government Users Restricted Rights - Use, duplication or disclosure
 * restricted by GSA ADP Schedule Contract with IBM Corp.
 */

 define([ "bi/commons/ui/View",
          'underscore', 
          'jquery',
          'q', 
          'bi/sharecommon/utils/simpledoT', 
          'text!bi/notifications/templates/messagesList.html', 
          'bi/sharecommon/utils/translator',
          'bi/commons/utils/Utils',
          "bi/notifications/app/n10nController",
          'bi/commons/utils/ContentFormatter',
          'moment-timezone'
	], 
	function(View, _, $, Q, dot, msgTemplate, t, Utils, controller, ContentFormatter, moment) {
	var DEFAULT_DELAY = 500;
	
	var __STANDARD_DATE_FORMAT = 'L';

	var messageListView = View.extend({

		/** constructor
		 * expects:
		 * { data: <msgList>, context: <context>}
		 */
		init: function(options){
			messageListView.inherited('init', this, arguments);
			$.extend(this, options);

			this.timezone = this.glassContext.services.userProfile.preferences.timeZoneID;
			this.defaultLocale = this.glassContext.services.userProfile.preferences.contentLocale || "en-us";

			this.KEYS = {
				'TAB': 9,
				'ENTER': 13,
				'SPACE': 32,
				'LEFT_ARROW': 37,
				'UP_ARROW': 38,
				'RIGHT_ARROW': 39,
				'DOWN_ARROW': 40
			};
		},
		
		setData: function(newData) {
			this.data = newData;
		},
		

        _setEvents: function() {
        	// Listen for a keydown event on the full message div
        	this.$el.find('.n10n_message').off('.n10n').on('keydown.n10n', this._handleKeyDown.bind(this));

        	// Listen for a "primaryaction" even on the message content div
            this.$el.find(".n10n_message_inner:not(.clickBound)").addClass('clickBound').on('primaryaction', function(event) {
                var messageId = event.currentTarget.parentNode.id;
                var $notification = this.$el.find(event.currentTarget.parentNode);

                // If the target of the event isn't selected (and thus shown)
                // then show it and mark it as selected
                if(!$notification.hasClass('selected')) {
                    var messageContext = {
                        messageId: messageId,
                        messageListView: this,
                        glassContext: this.glassContext,
                        onHideCallback: this.clear.bind(this)
                    };
                    controller.showNotificationContent(messageContext, this.slideout)

                    // visually display the current message as read
                    this._displayAsRead($notification);
                }
            }.bind(this));

            // Listen for a "primaryaction" event on the delete button
            this.$el.find(".n10n_delete_icon:not(.clickBound)").addClass('clickBound').on('primaryaction', function(event) {
                var messageId = event.currentTarget.parentNode.id;
                var deletionRequest = {
                    messageId: messageId,
                    pending: true
                };

                if (this.glassContext.services.userProfile.preferences.accessibilityFeatures) {
                    this.glassContext.appController.showMessage(t.translate('delete_notification_confirm_message'),
                    	t.translate('delete_confirm'), 'info', ['ok','cancel'], undefined, function(evt) {
                        if (evt.btn==='ok') {
                    		this._completeNotificationDelete(deletionRequest);
                        }
                    }.bind(this));
                } else {
                    var $message = $(event.currentTarget.parentNode);
                    $message.hide(DEFAULT_DELAY);

                    this.glassContext.appController.showToast(t.translate('delete_notification_message'), {
                        'type': 'info',
                        'btnLabel': t.translate('delete_undo'),
                        'callback': function() {
                    		deletionRequest.pending = false;
                    		this.$el.find('#' + deletionRequest.messageId).show(DEFAULT_DELAY);
                        }.bind(this),
                        'newestOnTop': true,
                        'preventDuplicates': false,
                        'timeOut': 6000,
                        'extendedTimeOut': 1000,
                        'onHidden': function() {
                    		this._completeNotificationDelete(deletionRequest);
                        }.bind(this)
                    });
                }
            }.bind(this));
        },

        /**
         * Handles moving the focus to the proper previous or next message in the notification list
         * depending on keys pressed as well as other factors
         */
		_handleKeyDown: function(event) {
			
			var key = event.keyCode || event.charCode || event.which || 0;

			if(key === this.KEYS.UP_ARROW || key === this.KEYS.DOWN_ARROW ||
				key === this.KEYS.LEFT_ARROW || key === this.KEYS.RIGHT_ARROW) {
				var $fromTarget = $(event.currentTarget);
				var $toTarget;

				switch(key) {
					case this.KEYS.DOWN_ARROW:
					case this.KEYS.RIGHT_ARROW:
						$toTarget = $fromTarget.next();
						if($toTarget.css('display') == 'none') {
							$toTarget = $toTarget.next();
						}
						break;
					case this.KEYS.UP_ARROW:
					case this.KEYS.LEFT_ARROW:
						$toTarget = $fromTarget.prev();
						if($toTarget.css('display') == 'none') {
							$toTarget = $toTarget.prev();
						}
						break;
				}

				if($toTarget && $toTarget.length > 0) {
					$toTarget.find('div.n10n_message_inner').focus();
				}
				event.preventDefault();
			}

			// Check to see the number of siblings to the parent of the
			// activeElement (the focused one) and load more messages if one or less.
			if($(event.target.parentNode).nextAll().length <= 1 &&
				(key === this.KEYS.DOWN_ARROW || key === this.KEYS.RIGHT_ARROW)) {
				if(this.loadMessagesCallback && typeof this.loadMessagesCallback === 'function'){
					this.loadMessagesCallback(this.$el.parent());
				}
			}
		},

        _completeNotificationDelete: function(deleteRequest) {
            var $pendingDeleteMessage = this.$el.find('#'+deleteRequest.messageId); 
            var context = {
                glassContext: this.glassContext
            };

            if(deleteRequest.pending) {
                controller.deleteNotification(deleteRequest.messageId, context).done(function(){
                    $pendingDeleteMessage.remove();
                }.bind(this));
            }
        },

	    clear: function() {
	    	// deactivate any selected messages
	    	this.$el.find(".n10n_message").removeClass("selected");
	    },

        _displayAsRead: function($el) {
            $el.attr('aria-label', t.translate('read_notification'));
            $el.find("strong").contents().unwrap();
            $el.find('.wft_message_unread_32').addClass('wft_message_read_32').removeClass('wft_message_unread_32');
        },

	    _formatContent: function(){
	    	var subjects = this.$el.find('.n10n_message_subject');
		    var dates = this.$el.find('.n10n_message_date');
		    var senders = this.$el.find('.n10n_message_sender');
    
		    for(var i=0; i<subjects.length; i++){
				if(subjects[i]) {
		 		 		ContentFormatter.middleShortenString(subjects[i]);
		 		 	}
				ContentFormatter.middleShortenString(dates[i]);
				ContentFormatter.middleShortenString(senders[i]);
			}
	    },
	    
	    _setIcon: function(){
            var deleteIcon = this.$el.find(".n10n_delete_icon:not(:has(svg))");
            Utils.setIcon(deleteIcon, 'common-remove-delete', t.translate('delete_notification'));
        },
	
	    render: function() {
            var svcData = [];
            var data = this.data || [];
            var unreadNotification = t.translate('unread_notification');
            var readNotification = t.translate('read_notification');
            var deleteLabel = t.translate('delete_message_label');
            for(var i=0; i<data.length;i++) {
                svcData.push({ icon: (data[i].unread)? "wft_message_unread_32" :"wft_message_read_32",
                    subject: _.escape(data[i].subject) || "",
                    sender: _.escape(data[i].sender) || "",
                    date: moment(data[i].created).locale(this.defaultLocale).tz(this.timezone).format(__STANDARD_DATE_FORMAT),
                    read: (data[i].unread)? "unread" :"read",
                    id: data[i].id || "",
                    label: (data[i].unread) ? unreadNotification : readNotification,
                    deleteLabel: deleteLabel
                });
            }
            var listAttrs = {
                msgs: svcData
            };
			var list = dot.simpleTemplate(msgTemplate);
            this.$el.append(list(listAttrs));
			this._formatContent();
			this._setEvents();
			this._setIcon();
			return Q(this);
	    },
	    
	    appendNewMessages: function(newMessages) {
	    	var svcData = [];
	    	var data = newMessages || [];
	    	var unreadNotification = t.translate('unread_notification');
            var readNotification = t.translate('read_notification');
            var deleteLabel = t.translate('delete_message_label');
	    	for(var i=0; i<data.length;i++) {
                svcData.push({ icon: (data[i].unread)? "wft_message_unread_32" :"wft_message_read_32",
                    subject: _.escape(data[i].subject) || "",
                    sender: _.escape(data[i].sender) || "",
                    date: moment(data[i].created).locale(this.defaultLocale).tz(this.timezone).format(__STANDARD_DATE_FORMAT),
                    read: (data[i].unread)? "unread" :"read",
                    id: data[i].id || "",
                    label: (data[i].unread) ? unreadNotification : readNotification,
                    deleteLabel: deleteLabel
                });
            }
            var listAttrs = {
                msgs: svcData
            };
			var list = dot.simpleTemplate(msgTemplate);
			this.$el.append(list(listAttrs));
			this._formatContent();
			this._setEvents();
			this._setIcon();
	    },
	    
	    prependNewMessages: function(newMessages) {
	    	var svcData = [];
	    	var data = newMessages || [];
	    	var unreadNotification = t.translate('unread_notification');
            var readNotification = t.translate('read_notification');
            var deleteLabel = t.translate('delete_message_label');
	    	for(var i=0; i<data.length;i++) {
                svcData.push({ icon: (data[i].unread)? "wft_message_unread_32" :"wft_message_read_32",
                    subject: _.escape(data[i].subject) || "",
                    sender: _.escape(data[i].sender) || "",
                    date: moment(data[i].created).locale(this.defaultLocale).tz(this.timezone).format(__STANDARD_DATE_FORMAT),
                    read: (data[i].unread)? "unread" :"read",
                    id: data[i].id || "",
                    label: (data[i].unread) ? unreadNotification : readNotification,
                    deleteLabel: deleteLabel
                });
            }
            var listAttrs = {
                msgs: svcData
            };
			var list = dot.simpleTemplate(msgTemplate);
			this.$el.prepend(list(listAttrs));
			this._formatContent();
			this._setEvents();
			this._setIcon();
	    },
		
		focusNextMessage: function(currentMessage) {
			var messageCount = this.$el.children().length - 1;
			if(messageCount > 0) {
				var $nextMessage = currentMessage.next('.n10n_message');
				if($nextMessage.length == 1) {
					$nextMessage.find('.n10n_message_inner').focus();
					currentMessage = $nextMessage;
				}
				else {
					var $prevMessage = currentMessage.prev('.n10n_message');
					if($prevMessage.length == 1) {
						$prevMessage.find('.n10n_message_inner').focus();
						currentMessage = $prevMessage;
					}
				}
			}
			return currentMessage;
		}
	});
	
	return messageListView;

});