/*
 * 	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',
			nextId: 		'nextBtn',
			orientation:	'',
			speed: 			600
		};

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

		return this.each(function() {
			obj = $(this);
			var s = $(".slider_item", obj).length;
			var w = obj.width();
			var h = obj.height();
			var h250 = 150;
			var ts = s-1;
			var t = 0;
			var vertical = (options.orientation == 'vertical');
			if(!vertical)
			{
				$(".slider_item", obj).css('float','left');
				$("#slider_body", obj).css('width',s*w);
			}
			// $(obj).after('<span id="'+ options.prevId +'"><a href=\"javascript:void(0);\">'+ options.prevText +'</a></span> <span id="'+ options.nextId +'"><a href=\"javascript:void(0);\">'+ options.nextText +'</a></span>');
			/*$("a","#"+options.prevId).hide();*/
			/*$("a","#"+options.nextId).hide();*/
			$("#img"+options.prevId).attr("src","/bitrix/templates/common_atc/img/slider/btn_up_disabled.png").ifixpng();
			$("#img"+options.nextId).attr("src","/bitrix/templates/common_atc/img/slider/btn_up_disabled.png").ifixpng();
			$("a","#"+options.nextId).click(function(){
				animate("next");
				if (t>=ts){ 
					/*$(this).fadeOut();*/
					$("#img"+options.nextId).attr("src","/bitrix/templates/common_atc/img/slider/btn_dwn_disabled.png").ifixpng();
				}
				$("a","#"+options.prevId).fadeIn();
				$("#img"+options.prevId).attr("src","/bitrix/templates/common_atc/img/slider/btn_up.png").ifixpng();
			});
			$("a","#"+options.prevId).click(function(){
				animate("prev");
				if (t<=0){ 
					/*$(this).fadeOut();*/
					$("#img"+options.prevId).attr("src","/bitrix/templates/common_atc/img/slider/btn_up_disabled.png").ifixpng();
				}
				$("a","#"+options.nextId).fadeIn();
				$("#img"+options.nextId).attr("src","/bitrix/templates/common_atc/img/slider/btn_dwn.png").ifixpng();
			});
			function animate(dir){
				var hmax = 0;
				for(var i=0;i<s;i++){
					hmax = hmax+$("#slider_item_"+i).height();
				}
				hmax = hmax-$("#slider").height();
				
				if(dir == "next"){
					var p=0;
					for(var i=0;i<t;i++){
						p = p-$("#slider_item_"+i).height();
					}
					if(p>=-hmax){
						t = (t>=ts) ? ts : t+1;
						var p=0;
						for(var i=0;i<t;i++){
							p = p-$("#slider_item_"+i).height();
						}
						if(p<-hmax){
							p = -hmax;
							/*t = t-1;*/
						}
						$("#slider_body",obj).animate(
							{ marginTop: p },
							options.speed
						);
					}
				} else {
						t = (t<=0) ? 0 : t-1;
						var p=0;
						for(var i=0;i<t;i++){
							p = p-$("#slider_item_"+i).height();/*(t*h250*-1);*/
						}
						$("#slider_body",obj).animate(
							{ marginTop: p },
							options.speed
						);
				};

				$("#slider_url").attr('href',$("#tmp_url"+t).attr('href'));
			};
			if(s>1){
				$("a","#"+options.nextId).fadeIn();
				$("#img"+options.nextId).attr("src","/bitrix/templates/common_atc/img/slider/btn_dwn.png").ifixpng();
			}
		});

	};

})(jQuery);