/*
 * 	Easy Slider 1.5 - jQuery plugin
 *	written by Alen Grakalic	
 *	http://cssglobe.com/post/4004/easy-slider-15-the-easiest-jquery-plugin-for-sliding
 *
 *	Copyright (c) 2009 Alen Grakalic (http://cssglobe.com)
 *	Dual licensed under the MIT (MIT-LICENSE.txt)
 *	and GPL (GPL-LICENSE.txt) licenses.
 *
 */
(function($) {
	$.fn.easySlider = function(options){
		// default configuration properties
		var defaults = {			
			prevId: 		'prevBtn',
			prevText: 		'Previous',
			nextId: 		'nextBtn',	
			nextText: 		'Next',
			controlsShow:	false,
			controlsBefore:	'',
			controlsAfter:	'',	
			controlsFade:	true,
			firstId: 		'firstBtn',
			firstText: 		'First',
			firstShow:		false,
			lastId: 		'lastBtn',	
			lastText: 		'Last',
			lastShow:		false,				
			vertical:		false,
			speed: 			800,
			auto:			false,
			pause:			2000,
			continuous:		false,
			sliderNum:      1,
			btnHide:        false,
			disableUselessBtn: false,
			more_width:		0			
		}; 
		var options = $.extend(defaults, options);  
		this.each(function() {  
			var all_pages = 0;
			var page = 1;
			var obj = $(this); 				
			var s = $("li", obj).length;
			all_pages = s/options.sliderNum;			
			if((s%options.sliderNum) != 0) s += (options.sliderNum - s%options.sliderNum);
			
			var w = $("li", obj).width()+options.more_width; 
			var h = $("li", obj).height(); 
			//obj.width(w); 
			//obj.height(h); 
			obj.css("overflow","hidden");
			obj.css("position","relative");
			
			var ts = s-options.sliderNum;
			var t = 0;
			$("ul", obj).css('width',s*w);
			if(!options.vertical) $("li", obj).css('float','left');
			if(options.controlsShow){
				var html = options.controlsBefore;
				if(options.firstShow) html += '<span id="'+ options.firstId +'"><a href=\"javascript:void(0);\">'+ options.firstText +'</a></span>';
				html += ' <span id="'+ options.prevId +'"><a href=\"javascript:void(0);\">'+ options.prevText +'</a></span>';
				html += ' <span id="'+ options.nextId +'"><a href=\"javascript:void(0);\">'+ options.nextText +'</a></span>';
				if(options.lastShow) html += ' <span id="'+ options.lastId +'"><a href=\"javascript:void(0);\">'+ options.lastText +'</a></span>';
				html += options.controlsAfter;						
				$(obj).after(html);										
			};
			$("a","#"+options.nextId).click(function(){		
				animate("next",true,0);
			});
			$("a","#"+options.prevId).click(function(){		
				animate("prev",true,0);				
			});	
			$("a","#"+options.firstId).click(function(){		
				animate("first",true,0);
			});				
			$("a","#"+options.lastId).click(function(){		
				animate("last",true,0);				
			});		
			
			function animate(dir,clicked,n){
				var ot = t;				
				if(n > 0){
					t = (options.sliderNum * (n-1));
				}
				else{
					switch(dir){
						case "next":							
							t = (ot>=ts) ? (options.continuous ? 0 : ts) : t+options.sliderNum;
							page=page+1;
							$('.circle_container > span').removeClass('circle_current');
							$('.circle_container > span').addClass('circle_not_current');
							$('.circle_container > span').eq(page-1).attr('class', 'circle_current');
							break; 
						case "prev":							
							t = (t<=0) ? (options.continuous ? ts : 0) : t-options.sliderNum;
							page=page-1;
							$('.circle_container > span').removeClass('circle_current');
							$('.circle_container > span').addClass('circle_not_current');
							$('.circle_container > span').eq(page-1).attr('class', 'circle_current');
							break; 
						case "first":
							t = 0;
							break; 
						case "last":
							t = ts;
							break; 
						default:
							break; 
					};	
				}
				var diff = Math.abs(ot-t);
				var speed = diff*options.speed;						
				if(!options.vertical) {
					p = (t*w*-1);
					$("ul",obj).animate(
						{ marginLeft: p }, 
						speed
					);				
				} else {
					p = (t*h*-1);
					$("ul",obj).animate(
						{ marginTop: p }, 
						speed
					);					
				};				
				if(!options.continuous && options.controlsFade){
					if($('.circle_container > span').length > 0){
						
					}
									
					if(t==ts){						
						//$("#"+options.nextId).removeClass('right_btn_blue');
						//$("#"+options.nextId).addClass('right_btn_blue_end');
						if(options.btnHide){							
							$("a","#"+options.nextId).hide();
							$("a","#"+options.lastId).hide();
						}
						if(options.disableUselessBtn){							
							//$("#"+options.nextId).addClass('disBtn');
							$("#"+options.prevId).removeClass('disBtn');
							$("#"+options.nextId).addClass('disBtn');
						
						}
					} else {
						//$("#"+options.nextId).removeClass();
						//$("#"+options.nextId).addClass('right_btn_blue');
						if(options.btnHide){
							$("a","#"+options.nextId).show();
							$("a","#"+options.lastId).show();
						}
						if(options.disableUselessBtn){							
							$("#"+options.nextId).removeClass('disBtn');
							$("#"+options.prevId).removeClass('disBtn');
						
						}
					};
					if(t==0){
						//$("#"+options.prevId).removeClass('left_btn_blue');
						//$("#"+options.prevId).addClass('left_btn_blue_end');
						if(options.btnHide){
							$("a","#"+options.prevId).hide();
							$("a","#"+options.firstId).hide();
						}
						if(options.disableUselessBtn){							
							//$("#"+options.nextId).addClass('disBtn');
							$("#"+options.prevId).addClass('disBtn');
							
						}
					} else {
						//$("#"+options.prevId).removeClass();
						//$("#"+options.prevId).addClass('left_btn_blue');
						if(options.btnHide){
							$("a","#"+options.prevId).show();
							$("a","#"+options.firstId).show();
						}
						if(options.disableUselessBtn){							
							//$("#"+options.nextId).removeClass('disBtn');
							//$("#"+options.prevId).removeClass('disBtn');
						
						}
					};					
				};				
				if(clicked) clearTimeout(timeout);
				if(options.auto && dir=="next" && !clicked){;
					timeout = setTimeout(function(){
						animate("next",false);
					},diff*options.speed+options.pause);
				};
			};
			// init			
			if(all_pages > 1){
				for(c=0;c<all_pages;c++){
					$('.circle_container').append('<span class="circle_not_current">&bull;</span>');	
				}
				$('.circle_container > span').eq(0).attr('class', 'circle_current');
				/*circles = $('.circle_container > span');
				circles.each(function(index){
					$("a", this).click(function(){
						animate("",true,(index+1));
						circles.removeClass('circle_current');
						circles.addClass('circle_not_current');
						$(this).parent().attr('class', 'circle_current');
					});		  
				});*/
			}
			var timeout;
			if(options.auto){;
				timeout = setTimeout(function(){
					animate("next",false);
				},options.pause);
			};		
			if(!options.continuous && options.controlsFade){
				if(options.btnHide){
					$("a","#"+options.prevId).hide();
					$("a","#"+options.firstId).hide();
				}
				if(options.disableUselessBtn){							
					$("#"+options.nextId).removeClass('disBtn');
					$("#"+options.prevId).addClass('disBtn');					
				}								
			};			
		});
	};
})(jQuery);