(function () {
    'use strict';

    var serviceId = 'stateService';
    angular.module('app').factory(serviceId, ['DSCacheFactory', 'datacontext', '$rootScope', state]);

    //service handling state values (like invite ids) passed into the app via the url
    function state(DSCacheFactory, datacontext, $rootScope) {
        var stateCacheValue = 'stateCacheValue';
        var stateCache = 'stateCache';

        var service = {
            handleState: handleState,
            addState: addState,
        };

        return service;

        function handleState() {
            //we use ds cache factory to stor the state values
            var cache = DSCacheFactory.get(stateCache);
            if (!cache) {
                cache = DSCacheFactory(stateCache, { storageMode: 'localStorage' });
                cache.setOptions({
                    maxAge: 360000,
                    deleteOnExpire: 'aggressive'
                });
            }

            var theState = cache.get(stateCacheValue);
            
            if (theState) {
                //state should be in 2 parts <descriptor>_<id> - so split by id
                var parts = theState.split('_');
                if (parts.length !== 2) //something wrong
                    return;
               
                if (parts[0] === 'organisationinviteduser') {
                    linkOrganisationInviteWithUser(parts[1]);
                    cache.destroy();
                }
            }
        }

        //as above but this is an organisation invite
        function linkOrganisationInviteWithUser(organisationInvitedUserId) {
            datacontext.linkOrganisationInviteWithUser(organisationInvitedUserId).then(function () {
                return datacontext.getNotifications().then(function (notifications) {
                    $rootScope.$broadcast('UpdateNotifications', { notificationsNum: notifications.length });
                });
            });
        }

        //add a state value
        function addState(value) {
            var cache = DSCacheFactory.get(stateCache);
            if (!cache) {
                cache = DSCacheFactory(stateCache, { storageMode: 'localStorage' });
                cache.setOptions({
                    maxAge: 360000,
                    deleteOnExpire: 'aggressive'
                });
            }
            cache.removeAll();
            cache.put(stateCacheValue, value);
        }

    }
})();