/**
 * @author Stéphane 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;

        if (options != false && elmnts.length > 1) {

            var title = $(elmnts[0]).children()[0].title;

            jQuery('.movie_headline').text(title)
        }
        if (elmnts.length > 1) {
            for (i = 0; i < shownInViewport; i++) {
                jQuery(sliderList).css('width', (numElmts + shownInViewport) * increment + increment + "px");
                jQuery(sliderList).append(jQuery(elmnts[i]).clone());
            }
        }
        jQuery(previous).click(function(event) {
            if (!isAnimating) {
                if (firstElementOnViewPort == 1) {
                    jQuery(sliderList).css('left', "-" + numElmts * sizeFirstElmnt + "px");
                    firstElementOnViewPort = numElmts;
                }
                else {
                    firstElementOnViewPort--;
                }

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

                var indx = firstElementOnViewPort;
                if (firstElementOnViewPort > numElmts) {
                    indx = 1;
                }
                if (options != false) {
                    var title = $("a", elmnts[indx - 1]).attr("title");
                    jQuery('.movie_headline').text(title)
                }
            }

        });

        jQuery(next).click(function(event) {
            if (!isAnimating) {
                var title = "";



                if (firstElementOnViewPort > numElmts) {
                    firstElementOnViewPort = 2;
                    jQuery(sliderList).css('left', "0px");

                }

                else {

                    firstElementOnViewPort++;

                }
                var indx = firstElementOnViewPort;
                if (firstElementOnViewPort > numElmts) {
                    indx = 1;
                }
                var title = $("a", elmnts[indx - 1]).attr("title");
                if (options != false) {
                    jQuery('.movie_headline').text(title);
                }
                jQuery(sliderList).animate({
                    left: "-=" + increment,
                    y: 0,
                    queue: true
                }, "swing", function() { isAnimating = false; });
                isAnimating = true;



            }
        });
    }
};