/*!
 * Tiny Carousel 1.9
 * http://www.baijs.nl/tinycarousel
 *
 * Copyright 2010, Maarten Baijs
 * Dual licensed under the MIT or GPL Version 2 licenses.
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.opensource.org/licenses/gpl-2.0.php
 *
 * Date: 01 / 06 / 2011
 * Depends on library: jQuery
 */
 
(function($){
	$.tiny = $.tiny || { };
	
	$.tiny.carousel = {
		options: {	
			'padding'     : 0,
            'width'       : 845,
            'stepSize'    : 400,
            'speed'       : 800,
            'callback'    : null
		}
	};
	
	$.fn.tinycarousel = function(options) {
		var options = $.extend({}, $.tiny.carousel.options, options);
		this.each(function(){$(this).data('jc', new Carousel($(this), options));});
		return this;
	};

	$.fn.tinycarousel_move = function(iNum){$(this).data('jc').move(iNum);};
    $.fn.tinycarousel_update = function(cW){$(this).data('jc').update(cW);};
        
	function Carousel(root, options){
		var jcInstance = this;
        var jcViewport = $('.viewport:first', root);
    
        var jcOverview = $('.overview:first', root);
        var jcButtonNext = $('.next:first', root);
        var jcButtonPrev = $('.prev:first', root);
        var jcOverviewWidth = 0;

        var iSteps = 0;
        var iCurrent = 0;
		
        
        
		function _initialize(){
            //alert('carousel '+$(root).attr('id')+' has been initialized');
            setEvents();
                        
            jcOverviewWidth = _countOverviewWidth(jcOverview);
            iSteps = _countISteps();
            iCurrent = 0;
            jcViewport.css('width', options.width);
            jcOverview.css('width', jcOverviewWidth);
            jcOverview.css('left', '0px');
            //jcInstance.move(0);
            return jcInstance;
		};
		function _countOverviewWidth(o) {
            var width = 0; 
            var imgs = o.find('img');
        
            $.each(imgs, function(index, value) {
                width += value.width;
                width += 2*options.padding;
            });        
            
            return width;
        }
        
        function _countISteps() {
             return Math.max(0, Math.ceil((jcOverviewWidth - options.width) / options.stepSize));
        }

        function setEvents(){
			jcButtonNext.click(function(){jcInstance.move(1);return false;});
			jcButtonPrev.click(function(){jcInstance.move(-1);return false;});		
		};

        this.update = function(cW) {
            jcOverviewWidth = cW;
            
			//alert('carousel '+$(root).attr('id')+' has been updated');
            //jcOverviewWidth = _countOverviewWidth(jcOverview);
            iSteps = _countISteps();
            iCurrent = 0;
            jcOverview.css('width', jcOverviewWidth);
            jcOverview.css('left', '0px');
		};

		this.move = function(direction){
			if ((iCurrent + direction) >= 0 && (iCurrent + direction) <= iSteps) {
                iCurrent += direction;
                var oPosition = {};
                oPosition['left'] = - Math.min( iCurrent*options.stepSize, (jcOverviewWidth-options.width));
                
                jcOverview.animate(oPosition, {
                    queue: false,
                    duration: options.speed                
                });
            }
		};
        
		return _initialize();
	};
})(jQuery);