/*
 * 	Easy Slider 1.7 - 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.
 *
 *	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,
	    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;
	    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("margin-left","-"+ 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;				
		if (options.numeric){
		    html += '<ol id="'+ options.numericId +'"></ol>';
		} else {
		    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);										
	    };
	    
	    if (options.numeric){									
		for(var i=0;i<s;i++){						
		    $(document.createElement("li"))
			.attr('id',options.numericId + (i+1))
			.html('<a rel='+ i +' href=\"javascript:void(0);\">'+ (i+1) +'</a>')
			.appendTo($("#"+ options.numericId))
			.click(function(){							
			    animate($("a",$(this)).attr('rel'),true);
			}); 												
		};							
	    } else {
		$("a","#"+options.nextId).click(function(){		
		    animate("next",true);
		});
		$("a","#"+options.prevId).click(function(){		
		    animate("prev",true);				
		});	
		$("a","#"+options.firstId).click(function(){		
		    animate("first",true);
		});				
		$("a","#"+options.lastId).click(function(){		
		    animate("last",true);				
		});				
	    };
	    
	    function setCurrent(i){
		i = parseInt(i)+1;
		$("li", "#" + options.numericId).removeClass("current");
		$("li#" + options.numericId + i).addClass("current");
	    };
	    
	    function adjust(){
		if (t>ts) t=0;		
		if (t<0) t=ts;	
		if (!options.vertical) {
		    $("ul",obj).css("margin-left",(t*w*-1));
		} else {
		    $("ul",obj).css("margin-left",(t*h*-1));
		}
		clickable = true;
		if (options.numeric) setCurrent(t);
	    };
	    
	    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;						
		    if (!options.vertical) {
			p = (t*w*-1);
			$("ul",obj).animate(
			    { marginLeft: p }, 
			    { queue:false, duration:speed, complete:adjust }
			);				
		    } else {
			p = (t*h*-1);
			$("ul",obj).animate(
			    { marginTop: p }, 
			    { queue:false, duration:speed, complete:adjust }
			);					
		    };
		    
		    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.continuous && options.controlsFade){					
		$("a","#"+options.prevId).hide();
		$("a","#"+options.firstId).hide();				
	    };				
	});
    };
})(jQuery);