/*
 * 	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: 		'',
			nextId: 		'nextBtn',	
			nextText: 		'',
			orientation:	'', //  'vertical' is optional;
			speed: 			600			
		}; 
		
		var options = $.extend(defaults, options);  
		
		return this.each(function() {  
			obj = $(this); 				
			var s = $("li", obj).length;
			if (s == 1) {
				return true;
			}
			var w = obj.width(); 
			var h = obj.height(); 
			var ts = s-1;
			var t = 0;
			var vertical = (options.orientation == 'vertical');
			$("ul", obj).css('width',s*w);			
			if(!vertical) $("li", obj).css('float','left');
			// Create the left and right buttons
			$(obj).before('<span id="'+ options.prevId +'" class="leftButton"></span>');
			$(obj).after('<span id="'+ options.nextId +'" class="rightButton"></span>');
			// Initialize the left button for first display
			if (t <= 0) {
				$("#" + options.prevId).removeClass("leftButton");
				$("#" + options.prevId).addClass("leftButtonEnd");
			}
			// Create and initialize the paginator
			var i;
			$("#realScreenPagin").append('<div id="screenPg0" class="screenPageOn"></div>')
			for (i = 1; i <= ts; i++) {
				$("#realScreenPagin").append('<div id="screenPg' + i + '" class="screenPageOff"></div>');
			}
			var paginatorPadding = 201 - (s / 2) * 16; // 201 is the real center of the screen, 16 is the circle size (8) + padding between circles (8)
			$("#realScreenPagin").css('padding-left', paginatorPadding + 'px');

			// Create the function for the right button click
			$("#"+options.nextId).click(function() {

				animate("next");
				if (t >= ts) {
					$(this).delay(300, function(){
						$("#" + options.nextId).removeClass("rightButton");
						$("#" + options.nextId).addClass("rightButtonEnd");
					});
				}
				$("#" + options.prevId).addClass("leftButton");
				$("#" + options.prevId).removeClass("leftButtonEnd");
				$("#leftButton").fadeIn();
			});
			// Create the function for the left button click
			$("#"+options.prevId).click(function(){		
				animate("prev");
				if (t <= 0)
				{
					$(this).delay(300, function(){
						$("#" + options.prevId).removeClass("leftButton");
						$("#" + options.prevId).addClass("leftButtonEnd");
					});	
				}
				$("#" + options.nextId).removeClass("rightButtonEnd");
				$("#" + options.nextId).addClass("rightButton");
				$("#rightButton").fadeIn();
			});	
			function animate(dir){
				if(dir == "next"){
					t = (t>=ts) ? ts : t+1;	
				} else {
					t = (t<=0) ? 0 : t-1;
				};
				$(".screenPageOn").addClass('screenPageOff');
				$(".screenPageOn").removeClass('screenPageOn');
				$("#screenPg" + t).removeClass('screenPageOff');
				$("#screenPg" + t).addClass('screenPageOn');
				if(!vertical) {
					p = (t*w*-1);
					$("ul",obj).animate(
						{ marginLeft: p }, 
						options.speed
					);				
				} else {
					p = (t*h*-1);
					$("ul",obj).animate(
						{ marginTop: p }, 
						options.speed
					);					
				}
			};

		});
	  
	};

})(jQuery);