/*
 *         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
 *
 */
 
/*
 *        markup example for $("#slider").easySlider();
 *        
 *         <div id="slider">
 *                <ul>
 *                        <li><img src="images/01.jpg" alt="" /></li>
 *                        <li><img src="images/02.jpg" alt="" /></li>
 *                        <li><img src="images/03.jpg" alt="" /></li>
 *                        <li><img src="images/04.jpg" alt="" /></li>
 *                        <li><img src="images/05.jpg" alt="" /></li>
 *                </ul>
 *        </div>
 *
 */

(function($) {

        $.fn.easySlider = function(options){
          
                // default configuration properties
                var defaults = {                        
                        prevId:                 'prevBtn',
                        prevText:                 'Previous',
                        nextId:                 'nextBtn',        
                        nextText:                 'Next',
                        controlsShow:        true,
                        controlsBefore:        '',
                        controlsAfter:        '',        
                        controlsFade:        false,
                        firstId:                 'firstBtn',
                        firstText:                 '',
                        firstShow:                false,
                        lastId:                 '',        
                        lastText:                 'Last',
                        lastShow:                false,                                
                        vertical:                false,
                        speed:                         3400,
                        auto:                        false,
                        pause:                        4000,
                        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);