/*
 * 	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.
 *
 *	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
        };
		
        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(); 
            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.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);
            });
            $("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 animate(dir,clicked){
                var ot = t;
                switch(dir){
                    case "next":
                        t = (ot>=ts) ? (options.continuous ? 0 : ts) : t+1;
                        break;
                    case "prev":
                        t = (t<=0) ? (options.continuous ? ts : 0) : t-1;
                        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(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.continuous && options.controlsFade){
                $("a","#"+options.prevId).hide();
                $("a","#"+options.firstId).hide();
            };
			
        });
	  
    };

})(jQuery);