/**
 * @author Stéphane Roucheray 
 * @extends jquery
 */


jQuery.fn.carousel = function (previous, next, options) {
    var sliderList = jQuery(this).children()[0];
    sliderListH = $(this).height();
    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;

        //controls drop-downs from individual items
        var subMenu = $(elmnts).children('.LNbody')[0];
        if (subMenu) {
            $(elmnts)
				.each(function () {
				    var subElmnts = $(this).children('.LNbody'),
					subElmntsH = subElmnts.height();

				    if (subElmntsH > 84) {
				        $(this).children('.LNbody').css({'height':'79px','overflow':'hidden'});
				        $(this).children('.readMore').css('display', "block");
				    }
				});
        }
        //prevents carousel from duplicating images 
        //if there are less than width of viewport
        if (numElmts <= shownInViewport) {
            jQuery(previous).addClass('hideCarouselArrow');
            jQuery(next).addClass('hideCarouselArrow');
            return;
        }

        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;
            }

        });

        jQuery(next).click(function (event) {
            if (!isAnimating) {
                if (firstElementOnViewPort > numElmts) {
                    firstElementOnViewPort = 2;
                    jQuery(sliderList).css('left', "0px");
                }
                else {
                    firstElementOnViewPort++;
                }
                jQuery(sliderList).animate({
                    left: "-=" + increment,
                    y: 0,
                    queue: true
                }, "swing", function () { isAnimating = false; });
                isAnimating = true;
            }
        });


    }
};