var $wrapper;
var currentWidth = 0;
var singleVisible = 0;

$.fn.infiniteCarousel = function(initC) {
    if (initC == 0) {
        function repeat(str, num) {
            return new Array(num + 1).join(str);
        }

        return this.each(function() {
            $wrapper = $('> div', this).css('overflow', 'hidden');
            var $slider = $wrapper.find('> ul'),
            $items = $slider.find('> li'),
            $single = $items.filter(':first'),
            
            singleWidth = $single.outerWidth(),
            visible = Math.floor(($wrapper.innerWidth())/ singleWidth), // note: doesn't include padding or border
            currentPage = 1,
            pages = Math.ceil($items.length / visible);


            // 1. Pad so that 'visible' number will always be seen, otherwise create empty items
            if (($items.length % visible) != 0) {
                $slider.append(repeat('<li class="empty" />', visible - ($items.length % visible)));
                $items = $slider.find('> li');
            }

            // 2. Top and tail the list with 'visible' number of items, top has the last section, and tail has the first       
            $items.filter(':first').before($items.slice(-visible).clone().addClass('cloned'));
            $items.filter(':last').after($items.slice(0, visible).clone().addClass('cloned'));
            $items = $slider.find('> li'); // reselect

            currentWidth = singleWidth;
            singleVisible = visible;

            // 3. Set the left position to the first 'real' item
            $wrapper.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;

                $wrapper.filter(':not(:animated)').animate({
                    scrollLeft: '+=' + left
                }, 500, function() {
                    if (page == 0) {
                        $wrapper.scrollLeft(singleWidth * visible * pages);
                        page = pages;
                    } else if (page > pages) {
                        $wrapper.scrollLeft(singleWidth * visible);
                        // reset back to start position
                        page = 1;
                    }

                    currentPage = page;
                });

                return false;
            }

            $wrapper.after('<a class="arrow back">&lt;</a><a class="arrow forward">&gt;</a>');

            // 5. Bind to the forward and back buttons
            $('a.back', this).click(function() {
                return gotoPage(currentPage - 1);
            });

            $('a.forward', this).click(function() {
                return gotoPage(currentPage + 1);
            });

            // create a public interface to move to a specific page
            $(this).bind('goto', function(event, page) {
                gotoPage(page);
            });
        });
    }
    else {
        $wrapper.scrollLeft(currentWidth * singleVisible);
    }
};