/**
* @author Stephane Roucheray
* @extends jquery
*/


jQuery.fn.carousel = function(previous, next, options) {

    var sliderList = jQuery(this).children()[0];

    if (sliderList) {
        var increment = jQuery(sliderList).children().outerWidth("true"),
		elmnts = jQuery(sliderList).children(),
		numElmts = elmnts.length,
		sizeFirstElmnt = increment,
		shownInViewport = Math.round(jQuery(this).width() / sizeFirstElmnt),
		firstElementOnViewPort = 1,
		isAnimating = false;



        var sliderWidth = (numElmts + shownInViewport) * increment + increment;

        //alert(sliderWidth);
        //homepage feature
        if (options == true) {

            //for double banners
            if (increment > 430) {
                numElmts = Math.ceil(numElmts / 2);
            }

        }

        for (i = 0; i < shownInViewport; i++) {
            jQuery(sliderList).css('width', sliderWidth + "px");
            jQuery(sliderList).append(jQuery(elmnts[i]).clone());

        }

        jQuery(previous).click(function(event) {
            if (!isAnimating) {
                //Cufon.refresh("h3");
                if (firstElementOnViewPort == 1) {
                    jQuery(sliderList).css('left', "-" + numElmts * sizeFirstElmnt + "px");
                    firstElementOnViewPort = numElmts;
                }
                else {
                    firstElementOnViewPort--;
                }

                jQuery(sliderList).animate({
                    left: "+=" + increment,
                    y: 0,
                    queue: false
                }, "swing", function() { isAnimating = false; });
                isAnimating = true;
            }

        });

        jQuery(next).click(function(event) {
            var genuineClick = (event.originalEvent != undefined);
            if ((!isAnimating && !mouseOverSlider) || genuineClick) {


                //exceeds length of list
                if (firstElementOnViewPort > numElmts) {

                    firstElementOnViewPort = 2;
                    jQuery(sliderList).css('left', "0px");
                }
                else {
                    firstElementOnViewPort++;

                }

                jQuery(sliderList).animate({

                    left: "-=" + increment,
                    y: 0,
                    queue: false
                }, "swing", function() { isAnimating = false; });
                isAnimating = true;
                Cufon.refresh();
            }
        });
    }
};