/*
 * 	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
 *
 */



(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:			4000,
            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);  
                return false;
            });
            $("a","#"+options.prevId).click(function(){
                animate("prev",true);
                return false;
            });
            $("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);