(function() {
    "use strict";

    angular.module("raz")
        .service("deliverableService", ["$http", "$q", function ($http, $q) {
            var resourceCollection = {whatsNewInfo: [], popularBookInfo: []};
            var currentWhatsNewBookCount = 0;
            var currentWhatsNewNonbookCount = 0;
            var currentPopularBookCount = 0;

            return {
                getWhatsNewBookCount: getWhatsNewBookCount,
                getWhatsNewNonbookCount: getWhatsNewNonbookCount,
                getPopularBookCount: getPopularBookCount,
                setInitPopularBook: setInitPopularBook,
                setInitWhatsNew: setInitWhatsNew,
                getWhatsNewInfo: getWhatsNewInfo,
                getPopularBookInfo: getPopularBookInfo
            };

            function getWhatsNewBookCount() {
                return currentWhatsNewBookCount;
            }

            function getWhatsNewNonbookCount() {
                return currentWhatsNewNonbookCount;
            }

            function getPopularBookCount() {
                return currentPopularBookCount;
            }

            function setWhatsNewCount(whatsNewBookCount, whatsNewNonbookCount) {
                currentWhatsNewBookCount = whatsNewBookCount;
                currentWhatsNewNonbookCount = whatsNewNonbookCount;
            }

            function setPopularBookCount(popularBookCount) {
                currentWhatsNewBookCount = popularBookCount;
            }

            function setInitWhatsNew(languageId, whatsNewBook, whatsNewCloseRead) {
                var whatsNew = [];
                whatsNew['book'] = whatsNewBook;
                whatsNew['nonbook'] = whatsNewCloseRead;
                resourceCollection.whatsNewInfo[languageId] = whatsNew;
                setWhatsNewCount(whatsNew['book'].count, whatsNew['nonbook'].count);
            }

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

            function getWhatsNewInfo(languageId) {
                var whatsNew = null;
                if (resourceCollection.whatsNewInfo[languageId]) {
                    var deferred = $q.defer();
                    whatsNew = resourceCollection.whatsNewInfo[languageId];
                    deferred.resolve(whatsNew);
                    setWhatsNewCount(whatsNew['book'].count, whatsNew['nonbook'].count);
                    return deferred.promise;
                } else {
                    var url = '/api/deliverable/whatsNewInfo/language/' + languageId;
                    return $http.get(url)
                        .then(function (response) {
                            whatsNew = response.data;
                            resourceCollection.whatsNewInfo[languageId] = whatsNew;
                            setWhatsNewCount(whatsNew['book'].count, whatsNew['nonbook'].count);
                            return response.data;
                        });
                }
            }

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

        }]);
})();