define(['events', 'libraryBrowser', 'imageLoader'], function (events, libraryBrowser, imageLoader) {

    return function (view, params, tabContent) {

        var self = this;

        var data = {};

        function getPageData(context) {
            var key = getSavedQueryKey(context);
            var pageData = data[key];

            if (!pageData) {
                pageData = data[key] = {
                    query: {
                        SortBy: "SortName",
                        SortOrder: "Ascending",
                        Fields: "PrimaryImageAspectRatio,SortName,SyncInfo",
                        StartIndex: 0,
                        ImageTypeLimit: 1,
                        EnableImageTypes: "Primary,Backdrop,Banner,Thumb",
                        Limit: LibraryBrowser.getDefaultPageSize()
                    },
                    view: libraryBrowser.getSavedView(key) || libraryBrowser.getDefaultItemsView('Poster', 'Poster')
                };

                pageData.query.ParentId = params.topParentId;
                libraryBrowser.loadSavedQueryValues(key, pageData.query);
            }
            return pageData;
        }

        function getQuery(context) {

            return getPageData(context).query;
        }

        function getSavedQueryKey(context) {

            if (!context.savedQueryKey) {
                context.savedQueryKey = libraryBrowser.getSavedQueryKey('folders');
            }
            return context.savedQueryKey;
        }

        function reloadItems(page) {

            Dashboard.showLoadingMsg();

            var query = getQuery(page);

            ApiClient.getItems(Dashboard.getCurrentUserId(), query).then(function (result) {

                // Scroll back up so they can see the results from the beginning
                window.scrollTo(0, 0);

                var pagingHtml = LibraryBrowser.getQueryPagingHtml({
                    startIndex: query.StartIndex,
                    limit: query.Limit,
                    totalRecordCount: result.TotalRecordCount,
                    showLimit: false,
                    updatePageSizeSetting: false,
                    addLayoutButton: false,
                    sortButton: false,
                    filterButton: false
                });

                var html = LibraryBrowser.getPosterViewHtml({
                    items: result.Items,
                    shape: "square",
                    context: 'folders',
                    showTitle: true,
                    showParentTitle: true,
                    lazy: true,
                    centerText: true,
                    overlayPlayButton: true
                });

                var i, length;
                var elems = tabContent.querySelectorAll('.paging');
                for (i = 0, length = elems.length; i < length; i++) {
                    elems[i].innerHTML = pagingHtml;
                }

                function onNextPageClick() {
                    query.StartIndex += query.Limit;
                    reloadItems(tabContent);
                }

                function onPreviousPageClick() {
                    query.StartIndex -= query.Limit;
                    reloadItems(tabContent);
                }

                elems = tabContent.querySelectorAll('.btnNextPage');
                for (i = 0, length = elems.length; i < length; i++) {
                    elems[i].addEventListener('click', onNextPageClick);
                }

                elems = tabContent.querySelectorAll('.btnPreviousPage');
                for (i = 0, length = elems.length; i < length; i++) {
                    elems[i].addEventListener('click', onPreviousPageClick);
                }

                var itemsContainer = tabContent.querySelector('.itemsContainer');
                itemsContainer.innerHTML = html;
                imageLoader.lazyChildren(itemsContainer);

                libraryBrowser.saveQueryValues(getSavedQueryKey(page), query);

                Dashboard.hideLoadingMsg();
            });
        }

        self.getCurrentViewStyle = function () {
            return getPageData(tabContent).view;
        };

        self.renderTab = function () {

            reloadItems(tabContent);
        };

        self.destroy = function () {
        };
    };
});