/*

 * 	loopedCarousel 0.5 - jQuery plugin

 *	written by Nathan Searles, based on loopedSlider (http://github.com/nathansearles/loopedSlider)	

 *	http://github.com/nathansearles/loopedCarousel

 *

 *	Copyright (c) 2009 Nathan Searles (http://nathansearles.com/)

 *	Dual licensed under the MIT (MIT-LICENSE.txt)

 *	and GPL (GPL-LICENSE.txt) licenses.

 *

 *	Built for jQuery library

 *	http://jquery.com

 *

 */



/*

 *	markup example for $("#loopedCarousel").loopedCarousel();

 *

 *	<div id="loopedCarousel">	

 *		<div class="container">

 *			<div class="slides">

 *				<div>1</div>

 *				<div>2</div>

 *				<div>3</div>

 *				<div>4</div>

 *				<div>5</div>

 *				<div>6</div>

 *				<div>7</div>

 *				<div>8</div>

 *				<div>9</div>

 *				<div>10</div>

 *				<div>11</div>

 *				<div>12</div>

 *				<div>13</div>

 *				<div>14</div>

 *				<div>15</div>

 *			</div>

 *		</div>

 *		<a href="#" class="previous">previous</a>

 *		<a href="#" class="next">next</a>	

 *	</div>

 *

 */



(function($) {

	$.fn.loopedCarousel = function(options) {

		

	var defaults = {			

		container: '.container',

		slides: '.slides',

		pagination: '.pagination',

		autoStart: 0, // Set to positive number for auto interval and interval time

		slidespeed: 300, // Speed of slide animation

		fadespeed: 300, // Speed of fade animation

		items: 3, // Items show

		padding: 0, // Padding between items

		showPagination: false, // Shows pagination links

		vertical: false

	};

		

	this.each(function() {	

		var obj = $(this);

		var o = $.extend(defaults, options);

		var i = o.items;

		var m = 0;

		var t = 1;

		var s = $(o.slides,obj).children().size();

		var w = $(o.slides,obj).children().outerWidth()+o.padding;

		var h = $(o.slides,obj).children().outerHeight()+o.padding;

		var c = Math.ceil($(o.slides,obj).children().size()/i);

		var pd = o.padding/2;

		var p = 0;

		var u = false;

		var n = 0;

		var pt = 0;

		var os = i*c-s;

		var params = {}; 

		

		if (o.vertical===true) { w = h; }

			

		if(o.showPagination){

			var buttons = s/i;

			$(obj).append('<ul class="pagination">');

			$(o.slides,obj).children().each(function(){

				if (n<buttons) {

					$(o.pagination,obj).append('<li><a rel="'+(n+1)+'" href="#" >'+(n+1)+'</a></li>');

					n = n+1;

				} else {

					n = 0;

					return false;

				}

				$(o.pagination+' li a:eq(0)',obj).parent().addClass('active');

			});

		}

		

		if (o.vertical===true) {

			$(o.container,obj).css({height:(w*i)});

			$(o.slides,obj).css({height:(s*w)});

		} else {

			$(o.container,obj).css({width:(w*i)});

			$(o.slides,obj).css({width:(s*w)});

		}

		

		$(o.slides,obj).children().each(function(){

			if (o.vertical===true) {

				$(this).css({position:'absolute',top:p+pd,display:'block'});

			} else {

				$(this).css({position:'absolute',left:p+pd,display:'block'});

			}

			p=p+w;

		});



		$(o.slides,obj).children().each(function(){

			pt = pt+1;

			if (pt<i+1) {

				params[o.vertical ? 'top' : 'left'] = (-w*pt)+pd-(w*os);

				$(o.slides,obj).children(':eq('+(s-pt)+')').css(params);

			}

			if (pt===i+2) {

				pt = 0;

				return false;

			}

		});

		

		$('.next',obj).click(function(){

			if(u===false) {

				animate('next',true);

				if(o.autoStart){clearInterval(sliderIntervalID);}

			}

			return false;

		});

		

		$('.previous',obj).click(function(){

			if(u===false) {	

				animate('prev',true);

				if(o.autoStart){clearInterval(sliderIntervalID);}

			} return false;

		});

		

		$(o.pagination+' li a',obj).click(function(){

			if ($(this).parent().hasClass('active')) {return false;}

			else {

				t = $(this).attr('rel');

				$(o.pagination+' li a',obj).parent().siblings().removeClass('active');

				$(this).parent().addClass('active');

				animate('fade',t);

				if(o.autoStart){clearInterval(sliderIntervalID);}

			} return false;

		});

		

		if (o.autoStart) {

			sliderIntervalID = setInterval(function(){

				if(u===false) {animate('next',true);}

			}, o.autoStart);

		}

		

		function current(t) {

			if(t===c+1){t=1;}

			if(t===0){t=c;}

			$(o.pagination+' li a',obj).parent().siblings().removeClass('active');

			$(o.pagination+' li a[rel="' + (t) + '"]',obj).parent().addClass('active');

		}

		

		function animate(dir,clicked){	

			u = true;	

			switch(dir){

				case 'next':

					t = t+1;

					m = (-(t*w-w)*i);

					current(t);		

					params[o.vertical ? 'top' : 'left'] = m;				

					$(o.slides,obj).animate(params, o.slidespeed,function(){

						if (t===c+1) {

							t = 1;

							params[o.vertical ? 'top' : 'left'] = 0;

							$(o.slides,obj).css(params,function(){

								$(o.slides,obj).animate(params);

							});						

							$(o.slides,obj).children().each(function(){	

								if (pt<i) {

									params[o.vertical ? 'top' : 'left'] = (w*pt)+pd;

									$(o.slides,obj).children(':eq('+pt+')').css(params);

									params[o.vertical ? 'top' : 'left'] = -(w*(pt+os+1)-pd);

									$(o.slides,obj).children(':eq('+(s-(pt+1))+')').css(params);

								} else {

									pt = 0; 

									return false;

								}

								pt = pt+1;

							});	

						}

						if (t===c) {

							$(o.slides,obj).children().each(function(){	

								if (pt<i) {

									params[o.vertical ? 'top' : 'left'] = w*(s+pt+os)+pd;

									$(o.slides,obj).children(':eq('+(pt)+')').css(params);

								} else {

									pt = 0;

									return false;

								}

								pt = pt+1;

							});

						}

						if (t===2) {

							$(o.slides,obj).children().each(function(){

								pt = pt+1;

								if (pt<i+1) {									

									params[o.vertical ? 'top' : 'left'] = ((w*s)+pd)-(w*pt);

									$(o.slides,obj).children(':eq('+(s-pt)+')').css(params);

								} else {

									pt = 0;

									return false;

								}

							});

						}

						u = false;

					});					

					break; 

				case 'prev':

					t = t-1;

					m = (-(t*w-w)*i);

					current(t);

					params[o.vertical ? 'top' : 'left'] = m;

					$(o.slides,obj).animate(params, o.slidespeed,function(){

						if (t===0) {

							t = c;

							params[o.vertical ? 'top' : 'left'] = -w*(s-i)-(w*os);

							$(o.slides,obj).css(params);

							$(o.slides,obj).children().each(function(){	

								if (pt<i) {

									params[o.vertical ? 'top' : 'left'] = w*(s+pt+os)+pd;

									$(o.slides,obj).children(':eq('+pt+')').css(params);									

									params[o.vertical ? 'top' : 'left'] = (s*w)+pd-(pt*w)-w;

									$(o.slides,obj).children(':eq('+((s-1)-pt)+')').css(params);

								} else {

									pt = 0; 

									return false;

								}

								pt = pt+1;

							});

						}

						if (t===2) {

							$(o.slides,obj).children().each(function(){	

								if (pt<i) {

									params[o.vertical ? 'top' : 'left'] = (w*pt)+pd;

									$(o.slides,obj).children(':eq('+pt+')').css(params);

								} else {

									pt = 0; 

									return false;

								}

								pt = pt+1;

							});

						}

						if (t===1) {

							$(o.slides,obj).children().each(function(){	

								if (pt<i) {

									params[o.vertical ? 'top' : 'left'] = -(w*pt)-w+pd-(w*os);

									$(o.slides,obj).children(':eq('+((s-1)-pt)+')').css(params);

								} else {

									pt = 0; 

									return false;

								}

								pt = pt+1;

							});

						}



						u = false;

					});

					break;

				case 'fade':

					t = [t]*1;

					m = (-(t*w-w)*i);

					current(t);

					$(o.slides,obj).children().fadeOut(o.fadespeed, function(){

						params[o.vertical ? 'top' : 'left'] = m;

						$(o.slides,obj).css(params);

						$(o.slides,obj).children().each(function(){	

							if (pt<i) {

								params[o.vertical ? 'top' : 'left'] = (pt*w)+pd;

								$(o.slides,obj).children(':eq('+pt+')').css(params);

								params[o.vertical ? 'top' : 'left'] = w*(s-pt)-w+pd;

								$(o.slides,obj).children(':eq('+((s-1)-pt)+')').css(params);

							} else {

								pt = 0; 

								return false;

							}

							pt = pt+1;

						});

						

						if(t===c){						

							$(o.slides,obj).children().each(function(){	

								if (pt<i) {

									params[o.vertical ? 'top' : 'left'] = w*(s+pt+os)+pd;

									$(o.slides,obj).children(':eq('+(pt)+')').css(params);

								} else {

									pt = 0;

									return false;

								}

								pt = pt+1;

							});

						}

						if(t===1){

							$(o.slides,obj).children().each(function(){

								pt = pt+1;

								if (pt<i+1) {

									params[o.vertical ? 'top' : 'left'] = -(w*pt)+pd-(w*os);

									$(o.slides,obj).children(':eq('+(s-pt)+')').css(params);

								} else {

									pt = 0;

									return false;

								}

							});

						}

						$(o.slides,obj).children().fadeIn(o.fadespeed);

						u = false;

					});

					break; 

				default:

					break;

				}					

			}

		});

	};

})(jQuery);