/*
 * 	Easy Slider - jQuery plugin
 *	written by Alen Grakalic	
 *	http://cssglobe.com/post/3783/jquery-plugin-easy-image-or-content-slider
 *
 *	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 $("#images").easySlider();
 *	
 * 	<div id="images">
 *		<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: true,
	        pause: 4000,
	        continuous: true,
	        hoverpause: 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 || (options.auto && options.pauseOnHover ) 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.hoverpause && options.auto) {
	            $(this).mouseover(function () {
	                clearTimeout(timeout);
	            }).mouseout(function () {
	                animate("next", false);
	            })
	        }
	        if (!options.continuous && options.controlsFade) {
	            $("a", "#" + options.prevId).hide();
	            $("a", "#" + options.firstId).hide();
	        };

	    });

	};

})(jQuery);