/* Copyright (c) 2008 Kean Loong Tan http://www.gimiti.com/kltan
 * Licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
 * jFlow
 * Version: 1.0 (May 13, 2008)
 * Requires: jQuery 1.2+
 */
 
(function($a) {

	$a.fn.kFlow = function(options) {
		var aopts = $a.extend({}, $a.fn.kFlow.defaults, options);
		var acur = 0;
		var amaxi = $a(".kFlowControl").length;
		$a(this).find(".kFlowControl").each(function(i){
			$a(this).click(function(){
				$a(".kFlowControl").removeClass("kFlowSelected");
				$a(this).addClass("kFlowSelected");
				var dur = Math.abs(acur-i+1);
				$a(aopts.slides).animate({
					marginLeft: "-" + (i * $a(aopts.slides).find(":first-child").width() + "px")
				}, aopts.duration*(dur));
				acur = i;
			});
		});	
		
		$a(aopts.slides).before('<div id="kFlowSlide"></div>').appendTo("#kFlowSlide");
		
		$a(aopts.slides).find("div").each(function(){
			$a(this).before('<div class="kFlowSlideContainer"></div>').appendTo($a(this).prev());
		});
		
		//initialize the controller
		$a(".kFlowControl").eq(acur).addClass("kFlowSelected");
		
		var resize = function (x){
			$a("#kFlowSlide").css({
				position: "relative",
				width: aopts.width,
				height: aopts.height,
				overflow: "hidden",
				float: "left"
			});
		
			$a(aopts.slides).css({
				position:"relative",
				width: $a("#kFlowSlide").width()*$a(".kFlowControl").length+"px",
				height: $a("#kFlowSlide").height()+"px",
				overflow: "hidden"
			});
		
			$a(aopts.slides).children().css({
				position:"relative",
				width: $a("#kFlowSlide").width()+"px",
				height: $a("#kFlowSlide").height()+"px",
				"float":"left"
			});
			
			$a(aopts.slides).css({
				marginLeft: "-" + (acur * $a(aopts.slides).find(":first-child").width() + "px")
			});
		}
		
		resize();
		
		$a(window).resize(function(){
			resize();						  
		});
		
		$a(".kFlowPrev").click(function(){
			if (acur > 0)
				acur--;
			else
				acur = amaxi -1;
			
			$a(".kFlowControl").removeClass("kFlowSelected");
			$a(aopts.slides).animate({
				marginLeft: "-" + (acur * $a(aopts.slides).find(":first-child").width() + "px")
			}, aopts.duration);
			$a(".kFlowControl").eq(acur).addClass("kFlowSelected");
		});
		
		$a(".kFlowNext").click(function(){
			if (acur < amaxi - 1)
				acur++;
			else
				acur = 0;
				
			$a(".kFlowControl").removeClass("kFlowSelected");
			$a(aopts.slides).animate({
				marginLeft: "-" + (acur * $a(aopts.slides).find(":first-child").width() + "px")
			}, aopts.duration);
			$a(".kFlowControl").eq(acur).addClass("kFlowSelected");
		});
	};
	
	$a.fn.kFlow.defaults = {
		easing: "swing",
		duration: 400,
		width: "100%"
	};
	
})(jQuery);