/*
 *      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'
                };

                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>';
                                        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);
                        };

                        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);
                                        };

                                };

                        };
                        // 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);