/*
 * 	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:	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',
            par:            'ul',
            elm:            'li',
            num:            1
        }; 
        
        var options = $.extend(defaults, options);  
                
        this.each(function() {
            var obj = $(this);
            var s = $(options.elm, obj).length;
            var w = $(options.elm, obj).width();
            var h = $(options.elm, obj).height();
            var autodir = 'next';
            var clickable = true;
            obj.width(w*options.num); 
            //obj.height(h); 
            obj.css("overflow","hidden");
            var ts = s-options.num;
            var t = 0;
            if(!options.vertical) $(options.par, obj).css('width',s*w);
            else $(options.par, obj).css('height', s*h);
            
            if(options.continuous){
                $(options.par, obj).prepend($(options.par + ' ' + options.elm + ":last-child", obj).clone().css("margin-left","-"+ w +"px").filter('a').attr('rel',''));
                $(options.par, obj).append($(options.par + ' ' + options.elm + ":nth-child(2)", obj).clone().filter('a').attr('rel'));
                if(!options.vertical) $(options.par, obj).css('width',(s+1)*w);
                else $(options.par, obj).css('height', (s+1)*h);
            };				
            
            if(!options.vertical) $(options.elm, obj).css('float','left');
            
            if(options.controlsShow){
                var html = options.controlsBefore;				
                if(options.firstShow) html += '<span class="'+ options.firstId +'"><a href=\"javascript:void(0);\">'+ options.firstText +'</a></span>';
                html += ' <span class="'+ options.prevId +'"><a href=\"javascript:void(0);\">'+ options.prevText +'</a></span>';
                html += ' <span class="'+ options.nextId +'"><a href=\"javascript:void(0);\">'+ options.nextText +'</a></span>';
                if(options.lastShow) html += ' <span class="'+ options.lastId +'"><a href=\"javascript:void(0);\">'+ options.lastText +'</a></span>';
                
                html += options.controlsAfter;
                $(obj).append(html);
            };
            
            if(options.numeric) {
                $('#' + options.numericId + ' ' + options.elm + ' a').each(function(i) {
                    $(this).attr('rel', i).click(function() { animate($(this).attr('rel'),true); return false; });
                });
            }
            
            $("."+options.nextId).click(function(){
                animate("next",true);
                return false;
            });
            $("."+options.prevId).click(function(){		
                animate("prev",true);
                return false;
            });		
                    
            function setCurrent(i){
                i = parseInt(i)+1;
                $(options.elm, "#" + options.numericId).removeClass("current");
                $(options.elm + "#" + options.numericId + i).addClass("current");
            };
            
            function adjust(){
                if(t>ts) t=0;		
                if(t<0) t=ts;	
                if(!options.vertical) {
                    $(options.par,obj).css("margin-left",(t*w*-1));
                } else {
                    $(options.par,obj).css("margin-top",(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);
                        $(options.par,obj).animate(
                            { marginLeft: p }, 
                            { queue:false, duration:speed, complete:adjust }
                        );
                    } else {
                        p = (t*h*-1);
                        $(options.par,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==autodir && !clicked){;
                        if(!options.continuous && t == ts) autodir = 'prev';
                        if(!options.continuous && t == 0) autodir = 'next';
                        timeout = setTimeout(function(){
                            animate(autodir,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);