/*
 * 	Easy Slider 1.7 - jQuery plugin
 *	written by Alen Grakalic
 *	modified by Raśl Polanco
 *	http://cssglobe.com/post/4004/easy-slider-15-the-easiest-jquery-plugin-for-sliding
 *
 *	Copyright (c) 2011 Alen Grakalic (http://cssglobe.com)
 *	Dual licensed under the MIT (MIT-LICENSE.txt)
 *	and GPL (GPL-LICENSE.txt) licenses.
 *
 *	Built for jQuery library
 *	http://jquery.com
 *
 */

(function($) {

	$.fn.easySlider = function(options){

		// default configuration properties
		var defaults = {
			prevId: 		'prevBtn',
			prevText: 		'Previous',
			nextId: 		'nextBtn',
			nextText: 		'Next',
			controlsShow:	true,
			controlsBefore:	'',
			controlsAfter:	'',
			controlsFade:	true,
			imageNormal:	'',
			imageCurrent:	'',
			firstId: 		'firstBtn',
			firstText: 		'First',
			firstShow:		false,
			lastId: 		'lastBtn',
			lastText: 		'Last',
			lastShow:		false,
			vertical:		false,
			speed: 			800,
			auto:			false,
			pause:			2000,
			continuous:		false,
			numeric: 		false,
			numericId: 		'controls'
		};

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

		this.each(function() {
			var obj = $(this);
			var s = $("li", obj).length;
			var w = $("li", obj).width();
			var h = $("li", obj).height();
			var clickable = true;
			if($.browser.mozilla) w++;
			obj.width(w);
			//obj.height(h);
			obj.css("overflow","hidden");
			var ts = s-1;
			var t = 0;
			$("ul", obj).css('width',s*w);

			if(options.continuous){
				$("ul", obj).prepend($("ul li:last-child", obj).clone().css("marginLeft","-"+ w +"px"));
				$("ul", obj).append($("ul li:nth-child(2)", obj).clone());
				$("ul", obj).css('width',(s+1)*w);
			};

			if(!options.vertical) $("li", obj).css('float','left');

			if(options.controlsShow){
				var html = options.controlsBefore;
				html += '<div id="'+ options.numericId +'"></div>';
				html += options.controlsAfter;
				$(obj).append(html);
			};

			$("li", obj).css('display','block');

			for(var i=0;i<s;i++){
				var _div = $("<div>");
				_div.attr('id',options.numericId + (i+1));
				_div.attr('class',(i==0)?'current':'');
				if(options.imageNormal != '') {
					if(options.imageCurrent == '') options.imageCurrent = options.imageNormal;
					_div.html('<a rel='+ i +' href=\"javascript:void(0);\"><img src=\"'+((i==0)?options.imageCurrent:options.imageNormal)+'\" alt=\"'+(i+1)+'\"\/></a>');
				}
				else {
					_div.html('<a rel='+ i +' href=\"javascript:void(0);\">'+ (i+1) +'</a>');
				}
				$("#"+ options.numericId, obj).append(_div);
				_div.click(function(){
					animate($("a",$(this)).attr('rel'),true);
				});
			};

			function setCurrent(i){
				i = parseInt(i,10)+1;
				// Asociamos el class "current" al nuevo div quitando el anterior
				$("#" + options.numericId + " div", obj).removeClass("current");
				$("div#" + options.numericId + i, obj).addClass("current");

				// Asociamos la imagen "current" al nuevo div quitando la anterior
				if(options.imageNormal != '') {
					$("#" + options.numericId + " div img", obj).attr('src', options.imageNormal);
					$("div#" + options.numericId + i + " img", obj).attr('src', options.imageCurrent);
				}
			};

			function adjust(t){
				if(!options.vertical) {
					$("ul",obj).css("marginLeft",(t*w*-1)+'px');
				} else {
					$("ul",obj).css("marginTop",(t*h*-1)+'px');
				}
				clickable = true;
			};

			function animate(dir,clicked){
				if (clickable){
					clickable = false;
					var ot = t;
					switch(dir){
						case "next":
							t = (ot>=ts) ? (options.continuous ? t+1 : ts) : t+1;
							break;
						case "prev":
							t = (t<=0) ? (options.continuous ? t-1 : 0) : t-1;
							break;
						case "first":
							t = 0;
							break;
						case "last":
							t = ts;
							break;
						default:
							t = dir;
							break;
					};
					var diff = Math.abs(ot-t);
					var speed = diff*options.speed;

					p = (options.vertical) ? t*h*-1 : t*w*-1;

					if(t>ts) t=0;
					if(t<0) t=ts;

					if(!options.vertical)
						$("ul",obj).animate({ marginLeft: p+'px' }, { queue:false, duration:speed, complete:function(){ adjust(t); }});
					else
						$("ul",obj).animate({ marginTop: p+'px' }, { queue:false, duration:speed, complete:function(){ adjust(t); }});

					setCurrent(t);

					if(!options.continuous && options.controlsFade){
						if(t==ts){
							$("a","#"+options.nextId).hide();
							$("a","#"+options.lastId).hide();
						} else {
							$("a","#"+options.nextId).show();
							$("a","#"+options.lastId).show();
						};
						if(t==0){
							$("a","#"+options.prevId).hide();
							$("a","#"+options.firstId).hide();
						} else {
							$("a","#"+options.prevId).show();
							$("a","#"+options.firstId).show();
						};
					};

					if(clicked) clearTimeout(timeout);
					if(options.auto && dir=="next" && !clicked){;
						timeout = setTimeout(function(){
							animate("next",false);
						},diff*options.speed+options.pause);
					};

				};

			};
			// init
			var timeout;
			if(options.auto){;
				timeout = setTimeout(function(){
					animate("next",false);
				},options.pause);
			};

			if(options.numeric) setCurrent(0);

			if(options.imageNormal != '' && options.imageCurrent == '')
				options.imageCurrent = options.imageNormal;

			if(!options.continuous && options.controlsFade){
				$("a","#"+options.prevId).hide();
				$("a","#"+options.firstId).hide();
			};

		});

	};

})(jQuery);