(function () {
    'use strict';

    //service that allows the server to notify the client of specific events using SignalR
    var serviceId = 'notifier';
    angular.module('app').factory(serviceId, ['Hub', 'common', '$rootScope', 'userAuth', 'datacontext', notifier]);

    function notifier(Hub, common, $rootScope, userAuth,datacontext) {
        var service = {
            start: start
        };

        return service;

        function start()
        {
            var tokenData = userAuth.getAuthToken();
            if (tokenData) {
                //SignalR Hub setup
                var hub = new Hub('notifier', {
                    //these functions are effectively called from the server
                    listeners: {
                        //a showcase has been published (by the out of process showcase publisher)
                        //update the list of showcases accordingly
                    'showcasePublished': function (val) {
                        common.logger.logSuccess("Showcase published", val, null, true);
                        $rootScope.$broadcast('UpdateShowcases');
                    },
                        //an Evernote item has been updated e.g. an Evernote note that was used to create an item has been changed
                        //broadcast the 'UpdateItems' message which will refresh the items 
                    'evernoteItemUpdated':function (itemId,title) {
                        common.logger.logSuccess(title + " updated in Evernote", itemId, null, true);
                        datacontext.clearCachesForItemUpdated([itemId]);
                        $rootScope.$broadcast('UpdateItems');
                    },
                        //an Evernote item has been created (an Evernote note is created that automatically creates an item)
                        //broadcast the 'UpdateItems' message which will refresh the items 
                    'evernoteItemCreated':function (itemId,title) {
                        common.logger.logSuccess(title + " created in Evernote", itemId, null, true);
                        datacontext.clearCachesForItemAdded();
                        $rootScope.$broadcast('UpdateItems');
                    },
                        //an item has been created externally (e.g. by the mobile app)
                        //broadcast the 'UpdateItems' message which will refresh the items 
                    'externalItemCreated':function (title) {
                        common.logger.logSuccess(title + " created externally", null, true);
                        datacontext.clearCachesForItemAdded();
                        $rootScope.$broadcast('UpdateItems');
                    },
                        //a new notification has arrived
                    'notificationsChanged': function (numberNotifications) {
                        common.logger.logSuccess("Notification added", null, true);
                        $rootScope.$broadcast('UpdateNotifications', { notificationsNum: numberNotifications });
                    }
                },
                errorHandler: function (error) {
                    console.error(error);
                },
                queryParams: { bearer: tokenData.access_token } //send the bearer token with every SignalR request
                });
            }
        }
    }
})();