/*
 *         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.ucslider = function(options) {
        // default configuration properties
        var defaults = {                        
            prevId: 'prevBtn',
            prevText: '',
            nextId: 'nextBtn',        
            nextText: '',
            controlsShow: true,
            controlsBefore: '',
            controlsAfter: '',        
            controlsFade: true,
            firstId: 'firstBtn',
            firstText: 'First',
            firstShow: false,
            lastId: 'lastBtn',        
            lastText: 'Last',
            lastShow: false,                                
            vertical: false,
            speed: 500,
            auto: false,
            pause: 5000,
            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;

                $("ul",obj).fadeOut(250);

                if (!options.vertical) {
                    p = (t*w*-1);
                    $("ul",obj).animate(
                        { marginLeft: p },
                        speed
                    );
                } else {
                    p = (t*h*-1);
                    $("ul",obj).animate(
                        { marginTop: p }, 
                        speed
                    );                                        
                };

                $("ul",obj).fadeIn(250);

                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);