(function(){
    "use strict";

    angular.module('shared')
        .provider('ResourceList', ['constantValues','languageConstants', function ResourceListProvider(constantValues,languageConstants) {
            var provider = this;
            provider.razPlus = 'y';
            provider.allBooksCount = 0;
            provider.selectedReadingLevels = null;
            provider.showMeOnlyFilters = null;
            provider.type = null;
            provider.selectedView = constantValues.GRID_VIEW;
            provider.selectedSort = constantValues.SORT_OPTIONS[0]['key'];
            provider.languageId = languageConstants.ENGLISH_LANGUAGE_ID;
            provider.levelBarLevels = null;
            provider.pending = false;
            provider.activeLevelBarPopoutLevel = null;
            provider.lastItemId = 0;
            provider.currentPage = 1;

            provider.allResources = [];
            provider.resources = [];          // one page of resources
            provider.filteredResources = [];  // allResources filtered by reading level and filter check boxes

            provider.viewKey = 'resource-card-view';
            provider.showMeOnlyKey = 'resource-card-show-me-only';

            provider.leveledBookFilters = null;
            provider.selectedFilters = null;

            provider.$get = ['_',ResourceListProvider];

            provider.setResources = function(resources) {
                if (resources && Object.keys(resources).length > 0) {
                    provider.allResources = provider.filteredResources = resources;
                    provider.getSavedView();
                }
            };

            provider.setLeveledBookFilters = function(leveledBookFilters) {
                provider.leveledBookFilters = leveledBookFilters;
            };

            provider.setFilters = function(filters) {
                provider.selectedFilters = filters;
            };

            provider.buildPageOfResources = function() {
                provider.resources = [];
                provider.activeLevelBarPopoutLevel = null;
                var start = 0;
                var finish = provider.allResources.length;
                if (provider.selectedView === constantValues.GRID_VIEW) {
                    start = (provider.currentPage - 1) * constantValues.RESOURCES_PER_PAGE;
                    finish = start + constantValues.RESOURCES_PER_PAGE;
                }
                provider.resources = provider.buildCategorizedList(provider.filteredResources,start,finish);
                if (Object.keys(provider.resources).length > 0) {
                    var lastLevel = Object.keys(provider.resources)[Object.keys(provider.resources).length - 1];
                    var lastLevelList = provider.resources[lastLevel];
                    provider.lastItemId = lastLevelList[lastLevelList.length - 1]['id'];
                }
            };

            provider.buildCategorizedList = function(list,start,finish) {
                var lastCategory = null;
                var results = [];
                for (var counter = start;counter < finish && counter < list.length;counter++) {
                    var resource = list[counter];
                    if (lastCategory !== resource['categoryId']) {
                        lastCategory = resource['categoryId'];
                        results[lastCategory] = [];
                    }
                    results[lastCategory].push(resource);
                }
                return results;
            };

            provider.getSavedView = function() {
                provider.selectedView = sessionStorage.getItem(provider.viewKey);
                provider.selectedView = provider.selectedView == null ? constantValues.GRID_VIEW : provider.selectedView;
            };

            provider.setReadingLevels = function(readingLevels) {
                provider.selectedReadingLevels = readingLevels;
            };

            provider.setShowMeOnlyFilters = function(showMeOnlyData) {
                provider.showMeOnlyFilters = showMeOnlyData;
            };

            provider.setAllBooksCount = function(allBooksCount) {
                provider.allBooksCount = allBooksCount;
            };

            provider.setType = function(type) {
                provider.type = type;
            };

            provider.setLanguageId = function(languageId) {
                provider.languageId = languageId;
            };

            provider.setLevelBarLevels = function(levelBarLevels) {
                provider.levelBarLevels = levelBarLevels;
            };

            function ResourceListProvider( _) {

                function getResources() {
                    return provider.resources;
                }

                function setShowMeOnlyFilters(showMeOnlyData) {
                    provider.setShowMeOnlyFilters(showMeOnlyData);
                };

                function setReadingLevels(readingLevels) {
                    provider.setReadingLevels(readingLevels);
                };

                function setFilters(filters) {
                    provider.selectedFilters = filters;
                }

                function setSelectedSort(sort) {
                    provider.selectedSort = sort;
                    provider.buildPageOfResources();
                }

                function getSelectedSort() {
                    return provider.selectedSort;
                }

                function setView(view) {
                    if (provider.selectedView == view) {
                        return;
                    }
                    sessionStorage.removeItem(provider.viewKey);
                    sessionStorage.setItem(provider.viewKey,view);
                    provider.selectedView = view;
                    provider.buildPageOfResources();
                }

                function setCurrentPage(page) {
                    provider.currentPage = page;
                    provider.buildPageOfResources();
                }

                function getFilteredBooksCount() {
                    return provider.filteredResources.length;
                }

                function getAllBooksCount() {
                    return provider.allBooksCount;
                }

                function getView() {
                    return provider.selectedView;
                }

                function getLanguageId() {
                    return provider.languageId;
                }

                function getLevelBarLevels() {
                    return provider.levelBarLevels;
                }

                function setPending(pending) {
                    provider.pending = pending;
                }

                function getPending() {
                    return provider.pending;
                }

                function getActiveLevelBarPopoutLevel() {
                    return provider.activeLevelBarPopoutLevel;
                }

                function setActiveLevelBarPopoutLevel(level) {
                    provider.activeLevelBarPopoutLevel = level;
                }

                function getLastItemId() {
                    return provider.lastItemId;
                }

                function getCurrentPage() {
                    return provider.currentPage;
                }

                function getType() {
                    return provider.type;
                }

                function getReadingLevels() {
                    return provider.selectedReadingLevels;
                }

                function getFilters() {
                    return provider.selectedFilters;
                }

                function getRazPlus() {
                    return provider.razPlus;
                }

                function setRazPlus(razPlus) {
                    provider.razPlus = razPlus;
                }

                function getLeveledBookFilters() {
                    return provider.leveledBookFilters;
                }

                function setAllResources(allResources) {
                    provider.allResources = allResources;
                }

                function getAllResources() {
                    return provider.allResources;
                }

                function setFilteredResources(filteredResources) {
                    provider.filteredResources = filteredResources;
                }

                function getFilteredResources() {
                    return provider.filteredResources;
                }

                function buildCategorizedList(list,start,finish) {
                    return provider.buildCategorizedList(list,start,finish);
                }

                return {
                    buildCategorizedList: buildCategorizedList,
                    setAllResources: setAllResources,
                    getAllResources: getAllResources,
                    setFilteredResources:setFilteredResources,
                    getFilteredResources:getFilteredResources,
                    getLeveledBookFilters: getLeveledBookFilters,
                    getRazPlus: getRazPlus,
                    setRazPlus:setRazPlus,
                    setShowMeOnlyFilters: setShowMeOnlyFilters,
                    getResources: getResources,
                    setReadingLevels: setReadingLevels,
                    getReadingLevels: getReadingLevels,
                    getFilteredBooksCount: getFilteredBooksCount,
                    getAllBooksCount: getAllBooksCount,
                    setFilters: setFilters,
                    getFilters: getFilters,
                    getView: getView,
                    setView: setView,
                    setSelectedSort: setSelectedSort,
                    getSelectedSort: getSelectedSort,
                    getLanguageId: getLanguageId,
                    getLevelBarLevels: getLevelBarLevels,
                    setPending: setPending,
                    getPending: getPending,
                    getActiveLevelBarPopoutLevel: getActiveLevelBarPopoutLevel,
                    setActiveLevelBarPopoutLevel:setActiveLevelBarPopoutLevel,
                    getLastItemId: getLastItemId,
                    getCurrentPage: getCurrentPage,
                    setCurrentPage: setCurrentPage,
                    getType: getType
                }
            }
        }]);
})();