/*
 * 	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',
            prevShow:               false,
            nextId: 		'nextBtn',	
            nextText: 		'Next',
            nextShow:               false,
            controlsShow:	false,
            controlsBefore:	'',
            controlsAfter:	'',	
            controlsFade:	true,
            firstId: 		'firstBtn',
            firstText: 		'First',
            firstShow:		false,
            lastId: 		'lastBtn',	
            lastText: 		'Last',
            lastShow:		false,				
            vertical:		false,
            speed: 			1500,
            auto:			true,
            pause:			10000,
            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>';
                    if(options.prevShow) html += ' <span id="'+ options.prevId +'"><a href=\"javascript:void(0);\">'+ options.prevText +'</a></span>';
                    if(options.nextShow) 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);
                    };
                    if(options.auto && 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);