(function () {

    "use strict";

    angular.module("enrMapModule")
           .factory("mapSelectedRegion", ["$rootScope", "regionPropertiesParser", function ($rootScope, regionPropertiesParser) {

               var regionChangeEventName = "selectedMapRegionChanged";
               var selectedRegionProperties;
               var selectedRegionId;

               var setSelectedRegion = function (newRegionProperties) {
                   selectedRegionProperties = newRegionProperties;
                   if (selectedRegionProperties === undefined) {
                       selectedRegionId = undefined;
                   } else {
                       selectedRegionId = regionPropertiesParser.getRegionPrimaryId(selectedRegionProperties);
                   }

                   $rootScope.$broadcast(regionChangeEventName, selectedRegionProperties, selectedRegionId);
               };

               return {
                   regionChangeEventName: regionChangeEventName,

                   isRegionSelected: function (regionProperties) { return regionPropertiesParser.getRegionPrimaryId(regionProperties) === selectedRegionId; },
                   isAnyRegionSelected: function () {
                       return selectedRegionProperties !== undefined && selectedRegionProperties !== null;
                   },

                   getSelectedRegionId: function () { return selectedRegionId; },
                   getSelectedRegionProperties: function () { return selectedRegionProperties; },
                   setSelectedRegion: function (newRegionProperties) { setSelectedRegion(newRegionProperties); },
                   clearSelectedRegion: function () { setSelectedRegion(undefined); }
               };
           }]);

}());