$.fn.infiniteCarousel = function () {

    function repeat(str, num) {
        return new Array( num + 1 ).join( str );
    }
    
    function createIndicators(el,num,starter){
    	var indicators = "";
    	for(var i = 0; i < num;i++){
    		if(starter == i){
    			indicators +="<span class='active'></span>";
    		}	else {
    			indicators +="<span></span>";
    		}
    		
    			
    	}
    	var container =document.getElementById(el);
    	container.innerHTML = indicators;
    	
    }
    
    function updateIndicators(els,num){
    	els.removeClass('active');
    	els[num-1].className = 'active';
    }
  
    return this.each(function () {
        var $wrapper = $('> div', this).css('overflow', 'hidden'),
            $slider = $wrapper.find('> ul'),
            $items = $slider.find('> li'),
            $single = $items.filter(':first'),
            singleWidth = $single.outerWidth(), 
            visible = Math.ceil($wrapper.innerWidth() / singleWidth), // note: doesn't include padding or border
            currentPage = 1,
            pages = Math.ceil($items.length / visible);            
			
			createIndicators('carousel-indicator',$items.length,currentPage -1);
			

        // 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
        
        // 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
            }, 400, 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;
               updateIndicators($('#carousel-indicator span'),currentPage);
            });                
            
            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);
        });
        
        var triggers = $('#carousel-indicator span');
        
        triggers.click(function () {
	        	for(var i = 0; i < triggers.length;i++){
	        		if(this == triggers[i]){
	        			pageNum = i + 1;
	        		}
	        	}   	
	            return gotoPage(pageNum);
	     });
        
    	
    	
        
        
        
    });  
};

$(document).ready(function () {
  $('#infinite-carousel').infiniteCarousel();
});