(function ($) {
    $.extend({
        tablesorterPager: new function () {

            function updatePageDisplay(c) {
                var s = $(c.cssPageDisplay, c.container).val((c.page + 1) + c.seperator + c.totalPages);
            }

            function setPageSize(table, size) {
                var c = table.config;
                c.size = size;
                c.totalPages = Math.ceil(c.totalRows / c.size);
                c.pagerPositionSet = false;
                moveToPage(table);
                fixPosition(table);
            }

            function fixPosition(table) {
                var c = table.config;
                if (!c.pagerPositionSet && c.positionFixed) {
                    var c = table.config, o = $(table);
                    if (o.offset) {
                        c.container.css({
                            bottom: '0px',
                            position: 'absolute'
                        });
                    }
                    c.pagerPositionSet = true;
                }
            }
            /*
            function fixPosition(table) {
            var c = table.config;
            if (!c.pagerPositionSet && c.positionFixed) {
            var c = table.config, o = $(table);
            if (o.offset) {
            c.container.css({
            top: o.offset().top + o.height() + 'px',
            position: 'absolute'
            });
            }
            c.pagerPositionSet = true;
            }
            }
            /**/

            function moveToFirstPage(table) {
                var c = table.config;
                c.page = 0;
                moveToPage(table);
            }

            function moveToPageNr(pagenr, table) {
                var c = table.config;
                c.page = pagenr;
                moveToPage(table);
            }

            function moveToLastPage(table) {
                var c = table.config;
                c.page = (c.totalPages - 1);
                moveToPage(table);
            }

            function moveToNextPage(table) {
                var c = table.config;
                c.page++;
                if (c.page >= (c.totalPages - 1)) {
                    c.page = (c.totalPages - 1);
                }
                moveToPage(table);
            }

            function moveToPrevPage(table) {
                var c = table.config;
                c.page--;
                if (c.page <= 0) {
                    c.page = 0;
                }
                moveToPage(table);
            }


            function moveToPage(table) {
                var c = table.config;
                if (c.page < 0 || c.page > (c.totalPages - 1)) {
                    c.page = 0;
                }

                renderTable(table, c.rowsCopy);
            }

            function renderTable(table, rows) {

                var c = table.config;
                var l = rows.length;
                var s = (c.page * c.size);
                var e = (s + c.size);
                if (e > rows.length) {
                    e = rows.length;
                }


                var tableBody = $(table.tBodies[0]);

                // clear the table body

                $.tablesorter.clearTableBody(table);

                for (var i = s; i < e; i++) {

                    //tableBody.append(rows[i]);

                    var o = rows[i];
                    var l = o.length;
                    for (var j = 0; j < l; j++) {

                        tableBody[0].appendChild(o[j]);

                    }
                }

                fixPosition(table, tableBody);

                $(table).trigger("applyWidgets");

                if (c.page >= c.totalPages) {
                    moveToLastPage(table);
                }

                updatePageDisplay(c);
            }

            this.appender = function (table, rows) {

                var c = table.config;

                c.rowsCopy = rows;
                c.totalRows = rows.length;
                c.totalPages = Math.ceil(c.totalRows / c.size);

                renderTable(table, rows);
            };

            this.defaults = {
                size: 13,
                offset: 20,
                page: 0,
                totalRows: 0,
                totalPages: 0,
                container: null,
                cssNext: '.next',
                cssPrev: '.prev',
                cssFirst: '.first',
                cssLast: '.last',
                cssPageDisplay: '.pagedisplay',
                cssPageSize: '.pagesize',
                seperator: "/",
                positionFixed: true,
                appender: this.appender
            };

            this.construct = function (settings) {

                return this.each(function () {

                    config = $.extend(this.config, $.tablesorterPager.defaults, settings);

                    var table = this, pager = config.container;

                    $(this).trigger("appendCache");

                    config.size = 13;

                    var totalPages = Math.ceil(config.totalRows / config.size)

                    if (totalPages > 1) {
                        var maxLi = 8;

                        $(pager).append('<ol></ol>');
                        var pageingList = $("ol", pager);

                        for (var i = 0; i < totalPages; i++) {
                            $(pageingList).append('<li><a class="page-entity">' + (i + 1) + '</a></li>');
                        }
                    }

                    $("li:eq(0)", pageingList).addClass("SelectedPagingItem");

                    $(".page-entity", pager).click(function () {
                        $("li", pager).removeClass("SelectedPagingItem");
                        $(this).parent().addClass("SelectedPagingItem");
                        var newPageNr = $(this).text() - 1;
                        moveToPageNr(newPageNr, table);

                        return false;
                    });

                    $(config.cssFirst, pager).click(function () {
                        moveToFirstPage(table);
                        return false;
                    });
                    $(config.cssNext, pager).click(function () {
                        moveToNextPage(table);
                        return false;
                    });
                    $(config.cssPrev, pager).click(function () {
                        moveToPrevPage(table);
                        return false;
                    });
                    $(config.cssLast, pager).click(function () {
                        moveToLastPage(table);
                        return false;
                    });
                    $(config.cssPageSize, pager).change(function () {
                        setPageSize(table, parseInt($(this).val()));
                        return false;
                    });
                });
            };

        }
    });
    // extend plugin scope
    $.fn.extend({
        tablesorterPager: $.tablesorterPager.construct
    });

})(jQuery);