(function () {
    $.fn.infiniteCarousel = function () {
        function repeat(str, n) {
            return new Array( n + 1 ).join(str);
        }
        
        return this.each(function () {
            // magic!
            var $wrapCarousel = $('> div', this).css('overflow', 'hidden'),
                $slider = $wrapCarousel.find('> ul').width(9999),
                $items = $slider.find('> li'),
                $single = $items.filter(':first')
                
                singleWidth = $single.outerWidth(),
                visible = Math.ceil($wrapCarousel.innerWidth() / singleWidth),
                currentPage = 1,
                pages = Math.ceil($items.length / visible);
                
            /* TASKS */
            
            // 1. pad the pages with empty element if required
            if ($items.length % visible != 0) {
                // pad
                $slider.append(repeat('<li class="empty" />', visible - ($items.length % visible)));
                $items = $slider.find('> li');
            }
            
            // 2. create the carousel padding on left and right (cloned)
            $items.filter(':first').before($items.slice(-visible).clone().addClass('cloned'));
            $items.filter(':last').after($items.slice(0, visible).clone().addClass('cloned'));
            $items = $slider.find('> li');
            
            // 3. reset scroll
            $wrapCarousel.scrollLeft(singleWidth * visible);
            
            // 4. paging function
            function gotoPage(page) {
                var dir = page < currentPage ? -1 : 1,
                    n = Math.abs(currentPage - page),
                    left = singleWidth * dir * visible * n;
                
                $wrapCarousel.filter(':not(:animated)').animate({
                    scrollLeft : '+=' + left
                }, 500, function () {
                    // if page == last page - then reset position
                    if (page > pages) {
                        $wrapCarousel.scrollLeft(singleWidth * visible);
                        page = 1;
                    } else if (page == 0) {
                        page = pages;
                        $wrapCarousel.scrollLeft(singleWidth * visible * pages);
                    }
                    
                    currentPage = page;


                    $('#carouselNav li').each(function(i) {

                        $(this).removeClass('activeCarouselPanel');

                        if((currentPage -1) == i) {
                            $(this).addClass('activeCarouselPanel');
                        } else {
                            $(this).addClass('inactiveCarouselPanel');
                        }

                    });
                });
            }
            
            // 5. insert the back and forward link
            $wrapCarousel.after('<a href="#" class="arrow back"></a><a href="#" class="arrow forward"></a>');
            
            // 6. bind the back and forward links
            $('a.back', this).click(function () {
                gotoPage(currentPage - 1);
                return false;
            });
            
            $('a.forward', this).click(function () {
                gotoPage(currentPage + 1);
                return false;
            });
            
            $(this).bind('goto', function (event, page) {
                gotoPage(page);
            });
            
            // THIS IS NEW CODE FOR THE AUTOMATIC INFINITE CAROUSEL
            $(this).bind('next', function () {
                gotoPage(currentPage + 1);
            });

            var gotoCarouselPage;

            $('#carouselNav').delegate("li", "mouseenter", function(ev) {
                var index = $('#carouselNav li').index(this);
                var p = (index + 1 > pages) ? (index + 1) - pages : index + 1;
                $.doTimeout('gotoPageDelay', 400, function() { 
                    gotoPage(p);
                });
            });
            
            $('#carouselNav').delegate("li", "mouseleave", function(ev) {
                $.doTimeout('gotoPageDelay'); 
            });

        });
    };
})(jQuery);

$(document).ready(function () {
    // THIS IS NEW CODE FOR THE AUTOMATIC INFINITE CAROUSEL
    var autoscrolling = true;
    
    $('.infiniteCarousel').infiniteCarousel().mouseover(function () {
        autoscrolling = false;
    }).mouseout(function () {
        //autoscrolling = true;
    });

    $('#carouselNav').mouseover(function() {
        autoscrolling = false;
    }).mouseout(function() {
        //autoscrolling = true;
    });
    
    setInterval(function () {
        if (autoscrolling) {
            $('.infiniteCarousel').trigger('next');
        }
    }, 5000);
});