(function() {
    "use strict";

    angular.module("raz")
        .service("resourceCollectionService", ["$http", "$q", function ($http, $q) {
            var resourceCollection = {whatsNewInfo: [], popularBookInfo: []};
            var curWhatsNewInfo = null;
            var curPopularBookInfo = null;

            function getCurWhatsNewInfo() {
                return curWhatsNewInfo;
            }

            function getCurPopularBookInfo() {
                return curPopularBookInfo;
            }

            function setInitWhatsNew(languageId, whatsNew) {
                resourceCollection.whatsNewInfo[languageId] = whatsNew;
                curWhatsNewInfo = whatsNew;
            }

            function setInitPopularBook(gradeId, popularBook) {
                resourceCollection.popularBookInfo[gradeId] = popularBook;
                curPopularBookInfo = popularBook;
            }

            function getWhatsNewInfo(languageId) {
                var deferred = $q.defer();
                if (resourceCollection.whatsNewInfo[languageId]) {
                    curWhatsNewInfo = resourceCollection.whatsNewInfo[languageId];
                    deferred.resolve(true);
                    return deferred.promise;
                } else {
                    var url = '/api/resourceCollection/whatsNewInfo/language/' + languageId;
                    return $http.get(url)
                        .then(function (response) {
                            resourceCollection.whatsNewInfo[languageId] = response.data;
                            curWhatsNewInfo = response.data;
                            return true;
                        });
                }
            }

            function getPopularBookInfo(gradeId) {
                var deferred = $q.defer();
                if (resourceCollection.popularBookInfo[gradeId]) {
                    curPopularBookInfo = resourceCollection.popularBookInfo[gradeId];
                    deferred.resolve(true);
                    return deferred.promise;
                } else {
                    if (gradeId == 'K') {
                        gradeId = 0;
                    }
                    var url = '/api/resourceCollection/popularBookInfo/grade/' + gradeId;
                    return $http.get(url)
                        .then(function (response) {
                            resourceCollection.popularBookInfo[gradeId] = response.data;
                            curPopularBookInfo = response.data;
                            return true;
                        });
                }
            }

            function getResourceInfo(api, optionId) {
                if (api == 'whatsNewInfo') {
                    return getWhatsNewInfo(optionId);
                } else if (api == 'popularBookInfo') {
                    return getPopularBookInfo(optionId);
                }
            }

            return {
                getCurWhatsNewInfo: getCurWhatsNewInfo,
                getCurPopularBookInfo: getCurPopularBookInfo,
                setInitPopularBook: setInitPopularBook,
                setInitWhatsNew: setInitWhatsNew,
                getResourceInfo: getResourceInfo
            };

        }]);
})();