/*
 * 	Easy Slider 1.7.5 - 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
 *
 * 	Easy Slider 1.75 - jQuery plugin
 *	updated by Justin Carroll
 *	http://www.3circlestudio.com/
 *
 *	Added option "allControls" to show both next/previous/first/last and
 *  numeric paging all at once
 *
 */
(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: 			500,
            auto:			false,
            pause:			5000,
            continuous:		true,
            numeric: 		false,
            numericId: 		'controls',
            allControls:	false
        };

        var options = $.extend(defaults, options);

        this.each(function() {
            var obj = $(this);
            var s = $("li.slide", obj).length;
            var w = $("li.slide", obj).width();
            var h = $("li.slide", obj).height();
            var clickable = true;
            var ts = s-1;
            var t = 0;
            if(options.continuous){
                $("ul.slides", obj).prepend($("ul li.slide:last-child", obj).clone().css("margin-left","-"+ w +"px"));
                $("ul.slides", obj).append($("ul li.slide:nth-child(2)", obj).clone());
                $("ul.slides", obj).css('width',(s+1)*w);
            };

            if(!options.vertical) $("li.slide", obj).css('float','left');

            if(options.controlsShow){
                var html = options.controlsBefore;
                if(options.numeric){
                    html += '<ol id="'+ options.numericId +'"></ol>';
                }

                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);
                    });
                };
            }

            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.slides",obj).css("margin-left",(t*w*-1));
                } else {
                    $("ul.slides",obj).css("margin-left",(t*h*-1));
                }
                clickable = true;
                if(options.numeric || options.allControls) setCurrent(t);
            };

            function animate(dir,clicked){
                if (clickable){
                    clickable = false;
                    var ot = t;
                    switch(dir){
                        case "next":
                            t = (ot>=ts) ? (options.continuous ? parseInt(t)+1 : ts) : parseInt(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.slides",obj).animate(
                        {
                            marginLeft: p
                        },
{
                            queue:false,
                            duration:speed,
                            complete:adjust
                        }
                        );
                    } else {
                        p = (t*h*-1);
                        $("ul.slides",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 || options.allControls) setCurrent(0);

            if(!options.continuous && options.controlsFade){
                $("a","#"+options.prevId).hide();
                $("a","#"+options.firstId).hide();
            };

        });

    };

})(jQuery);