/*
 * 	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);