/**
 * @author Stéphane Roucheray
 * @extends jquery
 *
 * This file was modified by Smiling Cheater, 2009/06/05
 */


jQuery.fn.carousel = function(previous, next, options){
    var sliderList = jQuery(this).children()[0];
    var current = 1;
    var blocksName = options;

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

        for (i = 0; i < shownInViewport; i++) {
            jQuery(sliderList).css('width',(numElmts+shownInViewport)*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('.' + blocksName).hide("fast");
                jQuery('#' + blocksName + firstElementOnViewPort).show("fast");

                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('.' + blocksName).hide("fast");
                if (firstElementOnViewPort > numElmts) {
                    jQuery('#' + blocksName + "1").show("fast");
                } else {
                    jQuery('#' + blocksName + firstElementOnViewPort).show("fast");
                }

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