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

            function updatePageDisplay(table) {
                var c = table.config;
                var paginghtml = '';

                //var startoffset = Math.max(c.page - 1, 1);
                var startoffset = 1;
                var endoffset = Math.min(c.page + 3, c.totalPages);

                // hide paging controls if we only have one page
                if (c.totalPages == 1) {
                    $(c.cssPageDisplay, c.container).hide();
                }
                else {
                    $(c.cssPageDisplay, c.container).show();
                }

                // remove old event handlers
                $(c.cssPageDisplay + ' a', c.container).unbind('click');

                for (var i = startoffset; i <= endoffset; i++) {
                    if (c.page + 1 == i) {
                        paginghtml += '<a href="#page' + i + '"><strong>' + i + '</strong></a>';
                    }
                    else {
                        paginghtml += '<a href="#page' + i + '">' + i + '</a>';
                    }
                }

                $(c.cssPageDisplay, c.container).html(paginghtml);

                if (c.page == 0) {
                    $(config.cssPrev, config.container).hide();
                }
                else {
                    $(config.cssPrev, config.container).show();
                }

                if (c.page == c.totalPages - 1) {
                    $(config.cssNext, config.container).hide();
                }
                else {
                    $(config.cssNext, config.container).show();
                }

                // set up click handlers
                $(c.cssPageDisplay + ' a', c.container).click(function() {
                    var pageno = /#page(\d+)/.exec(this.href)[1];

                    table.config.page = pageno - 1; moveToPage(table);

                    return false;
                });
            }

            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({
                            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 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(table);
            }

            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: 10,
                offset: 0,
                page: 0,
                totalRows: 0,
                totalPages: 0,
                container: null,
                cssNext: '.next',
                cssPrev: '.previous',
                cssFirst: '.first',
                cssLast: '.last',
                cssPageDisplay: '.pagedisplay',
                cssPageSize: '.pagesize',
                seperator: "/",
                positionFixed: false,
                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 = parseInt($(".pagesize",pager).val());

                    /*$(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);