/*
 * 	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
 *
 */

(function($) {
	$.fn.easySlider = function(options) {
		// default configuration properties
		var defaults = {			
			prevId: 		'prevBtn',
			prevText: 		'',
			nextId: 		'nextBtn',	
			nextText: 		'',
			controlsShow:	true,
			controlsBefore:	'',
			controlsAfter:	'',	
			controlsFade:	true,
			firstId: 		'firstBtn',
			firstText: 		'First',
			firstShow:		false,
			lastId: 		'lastBtn',	
			lastText: 		'Last',
			lastShow:		false,				
			vertical:		false,
			speed: 			1500,
			auto:			true,
			pause:			4000,
			continuous:		true, 
			numeric: 		false,
			numericId: 		'controls',
			hoverPause:		true
		}; 
		
		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).prepend(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);				
				});
				if(options.hoverPause)
					$(this).hover(
						function() {
							options.auto = false;
							animate('pause', true);
						},
						function() {
							options.auto = true;
							animate('next', 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;
						case 'pause':
							t = t;
							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) {
						timeout = setTimeout(function() {animate('next', false);}, diff * options.speed + options.pause);
					};
				} else {
					if(dir == 'pause')
						clearTimeout(timeout);
				}
			};
			// 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);