/*
 * 	Easy Slider - jQuery plugin
 *	written by Alen Grakalic	
 *	http://cssglobe.com/post/3783/jquery-plugin-easy-image-or-content-slider
 *
 *	Copyright (c) 2009 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: 		    '‹',
			nextId: 		      'nextBtn',
			nextText: 		    '›',
			controlsShow:	    true,
			controlsBefore:	  '',
			controlsAfter:	  '',
			controlsFade:	    true,
			firstId: 		      'firstBtn',
			firstText: 		    '«',
			firstShow:		    false,
			lastId: 		      'lastBtn',
			lastText: 		    '»',
			lastShow:		      false,
			vertical:		      false,
			speed: 			      800,
			auto:			        false,
			pause:			      2000,
			continuous:		    false
		}; 
		
		var options = $.extend(defaults, options);  
		
		return this.each(function() {  
			obj = $(this); 				
			var s = $("li", obj).length;
			var w = 200*(s-1);//obj.width(); 
			var h = 200;//obj.height();
      var ts = s-1;
			var t = 0;
			//alert('item:'+t); 
			var vertical = (options.orientation == 'vertical');
			$("ul", obj).css('width',s*w);			
			if(!vertical) $("li", obj).css('float','left');
			//$(obj).after('<span id="'+ options.prevId +'"><a href=\"javascript:void(0);\">'+ options.prevText +'</a></span> <span id="'+ options.nextId +'"><a href=\"javascript:void(0);\">'+ options.nextText +'</a></span>');		
			$("a","#"+options.prevId).hide();
			$("a","#"+options.nextId).hide();
			$("a","#"+options.nextId).click(function(){		
				animate("next",true);
				if (t>=ts) $(this).fadeOut();
				$("a","#"+options.prevId).fadeIn();
			});
			$("a","#"+options.prevId).click(function(){		
				animate("prev",true);
				if (t<=0) $(this).fadeOut();
				$("a","#"+options.nextId).fadeIn();
			});	
			function animate(dir, clicked){
				var ot = t;
				switch(dir){
					case "next":
						t = (ot>=ts) ? (options.continuous ? 0 : ts) : t+1;
						break;
					case "prev":
						t = (t<=0) ? (options.continuous ? ts : 0) : t-1;
						break;
					case "first":
						t = 0;
						break;
					case "last":
						t = ts;
						break;
					default:
						break;
				};
								
				if(!vertical) {
					p = (t*175*-1);
					$("ul",obj).animate(
						{ marginLeft: p }, 
						options.speed
					);				
				} else {
					p = (t*200);
					$("ul",obj).animate(
						{ marginTop: p }, 
						options.speed
					);					
				}

				var diff = Math.abs(ot-t);
				var speed = diff*options.speed;

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

			};
			if(s>1) $("a","#"+options.nextId).fadeIn();
			
			// init
			var timeout;
			if(options.auto){;
				timeout = setTimeout(function(){
					animate("next",false);
				},options.pause);
			};
		});
	  
	};

})(jQuery);