/**
 * jQuery Cycle Lite Plugin
 * http://malsup.com/jquery/cycle/lite/
 * Copyright (c) 2008 M. Alsup
 * Version: 1.0 (06/08/2008)
 * Dual licensed under the MIT and GPL licenses:
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.gnu.org/licenses/gpl.html
 * Requires: jQuery v1.2.3 or later
 */

;(function($) {

	var ver = 'Lite-1.0';

	$.fn.cycle = function(options) {
		return this.each(function() {
			options = options || {};

			if (this.cycleTimeout)
				clearTimeout(this.cycleTimeout);
			this.cycleTimeout = 0;
			this.cyclePause = 0;

			var $cont = $(this);
			var $slides = options.slideExpr ? $(options.slideExpr, this) : $cont.children();
			var els = $slides.get();
			if (els.length < 2) {
				if (window.console && window.console.log)
					window.console.log('terminating; too few slides: ' + els.length);
				return; // don't bother
			}

			// support metadata plugin (v1.0 and v2.0)
			var opts = $.extend({}, $.fn.cycle.defaults, options || {}, $.metadata ? $cont.metadata() : $.meta ? $cont.data() : {});

			opts.before = opts.before ? [opts.before] : [];
			opts.after = opts.after ? [opts.after] : [];
			opts.after.unshift(function(){ opts.busy=0; });

			// allow shorthand overrides of width, height and timeout
			var cls = this.className;
			//opts.height = 0;
			opts.width = parseInt((cls.match(/w:(\d+)/)||[])[1]) || opts.width;
			opts.timeout = parseInt((cls.match(/t:(\d+)/)||[])[1]) || opts.timeout;
			
			if ($cont.css('position') == 'static') 
					$cont.css('position', 'relative');
			if (opts.width) 
					$cont.width(opts.width);
			if (opts.height && opts.height != 'auto') 
					$cont.height(opts.height);
			
			var first = 0;
			$slides.css({position: 'absolute', top:0, left:0}).hide().each(function(i) {
				$(this).css('z-index', els.length-i);
			});
			
			//$cont.height(opts.height);

			$(els[first]).css('opacity',1).show(); // opacity bit needed to handle reinit case
			if ($.browser.msie)
				els[first].style.removeAttribute('filter');

			if (opts.fit && opts.width) 
				$slides.width(opts.width);
			if (opts.fit && opts.height && opts.height != 'auto') 
				$slides.height(opts.height);
			if (opts.pause) 
				$cont.hover(function(){this.cyclePause=1;}, function(){this.cyclePause=0;});

			$.fn.cycle.transitions.fade($cont, $slides, opts);

			$slides.each(function() {
				var $el = $(this);
				this.cycleH = (opts.fit && opts.height) ? opts.height : $el.height();
				this.cycleW = (opts.fit && opts.width) ? opts.width : $el.width();
			});

			$slides.not(':eq('+first+')').css({opacity:0});
			
			if (opts.speed.constructor == String)
				opts.speed = {slow: 600, fast: 200}[opts.speed] || 400;
			if (!opts.sync)
				opts.speed = opts.speed / 2;

			if (opts.timeout) {
				opts.timeout = prepereTime( opts.timeout, opts );
			}
			opts.speedIn = opts.speed;
			opts.speedOut = opts.speed;

			opts.slideCount = els.length;
			opts.currSlide = first;
			opts.nextSlide = 1;

			// fire artificial events
			var e0 = $slides[first];
			if (opts.before.length)
				opts.before[0].apply(e0, [e0, e0, opts, true]);
			if (opts.after.length > 1)
				opts.after[1].apply(e0, [e0, e0, opts, true]);

			if (opts.click && !opts.next)
				opts.next = opts.click;
			if (opts.next)
				$(opts.next).bind('click', function(){return advance(els,opts,opts.rev?-1:1)});
			if (opts.prev)
				$(opts.prev).bind('click', function(){return advance(els,opts,opts.rev?1:-1)});
				
			// nav
			if ( opts.nav ) {
				var navis = $(opts.nav).children().get();
				$(navis).each( function( i ) {
					if ( i == 0 )
						$(this).addClass('current')
					if ( i <= els.length ) {
						$(this).addClass('nav'+i).bind( 'click', function() { return navigateTo(els,opts, i) });
					}
				});
			}
			
			// control
			if ( opts.control ) {
				$(opts.control).addClass('pause').text('pause').bind('click', function() {
					var p = els[0].parentNode
					if ( p.cyclePause == 0 ) {
						p.cyclePause = 1;
						$(this).removeClass('pause').addClass('pley').text('play');
					} else {
						p.cyclePause = 0;
						$(this).removeClass('play').addClass('pause').text('pause');
					}
					return false;
				});
				
			}

			//
			var currTimeout = prepereTime( parseInt((els[opts.currSlide].className.match(/t:(\d+)/)||[])[1]), opts ) || opts.timeout;
			/*
			if ( currTimeout < opts.timeout )
				currTimeout = opts.timeout;
			*/

			if (currTimeout)
				this.cycleTimeout = setTimeout(function() {
					go(els,opts,0,!opts.rev)
				}, currTimeout + (opts.delay||0));
		});
	};
	
	function prepereTime( input, opts ) {
		while((input - opts.speed) < 250)
			input += opts.speed;
		return input;
	};

	function go(els, opts, manual, fwd) {
		if (opts.busy)
			return;
		var p = els[0].parentNode, curr = els[opts.currSlide], next = els[opts.nextSlide];
		if (p.cycleTimeout === 0 && !manual) 
			return;
		
		if (manual || !p.cyclePause) {
			if (opts.before.length)
				$.each(opts.before, function(i,o) { o.apply(next, [curr, next, opts, fwd]); });
			var after = function() {
				if ($.browser.msie)
					this.style.removeAttribute('filter');
				$.each(opts.after, function(i,o) { o.apply(next, [curr, next, opts, fwd]); });
			};

			if (opts.nextSlide != opts.currSlide) {
				opts.busy = 1;
				$.fn.cycle.custom(curr, next, opts, after);
				//
				if ( opts.nav ) {
					$(opts.nav+" .nav"+opts.currSlide).removeClass("current");
					$(opts.nav+" .nav"+opts.nextSlide).addClass("current");
				}
				//
			}
			var roll = (opts.nextSlide + 1) == els.length;
			opts.nextSlide = roll ? 0 : opts.nextSlide+1;
			opts.currSlide = roll ? els.length-1 : opts.nextSlide-1;
		}
		//
		var currTimeout = prepereTime( parseInt((els[opts.currSlide].className.match(/t:(\d+)/)||[])[1]), opts ) || opts.timeout;
		/*
		if ( currTimeout < opts.timeout )
			currTimeout = opts.timeout;
		*/
		if (currTimeout) {
			p.cycleTimeout = setTimeout(function() { go(els,opts,0,!opts.rev) }, currTimeout);
		}
	};
	
	//
	function navigateTo(els, opts, target) {
		if ( target != opts.currSlide ) {
			var p = els[0].parentNode, timeout = p.cycleTimeout;
			if (timeout) {
				clearTimeout(timeout);
				p.cycleTimeout = 0;
			}
			opts.nextSlide = target;
			go(els, opts, 1, target);
			if ( opts.stopOnManual == true ) {
				p.cyclePause = 0;
				if ( opts.control ) {
					$(opts.control).trigger('click');
				}
				p.cyclePause = 1;
			}
			return false;
		}
	};
	
	// advance slide forward or back
	function advance(els, opts, val) {
		var p = els[0].parentNode, timeout = p.cycleTimeout;
		if (timeout) {
			clearTimeout(timeout);
			p.cycleTimeout = 0;
		}
		opts.nextSlide = opts.currSlide + val;
		if (opts.nextSlide < 0) {
			opts.nextSlide = els.length - 1;
		} else if (opts.nextSlide >= els.length) {
			opts.nextSlide = 0;
		}
		go(els, opts, 1, val>=0);
		if ( opts.stopOnManual == true ) {
			p.cyclePause = 0;
			if ( opts.control ) {
				$(opts.control).trigger('click');
			}
			p.cyclePause = 1;
		}
		return false;
	};

	$.fn.cycle.custom = function(curr, next, opts, cb) {
		var $l = $(curr), $n = $(next);
		$n.css({opacity:0});
		var fn = function() {$n.animate({opacity:1}, opts.speedIn, opts.easeIn, cb)};
		$l.animate({opacity:0}, opts.speedOut, opts.easeOut, function() {
			$l.css({display:'none'});
			if (!opts.sync)
				fn();
		});
		if (opts.sync)
			fn();
	};

	$.fn.cycle.transitions = {
		fade: function($cont, $slides, opts) {
			$slides.not(':eq(0)').css('opacity',0);
			opts.before.push(function() { $(this).show() });
		}
	};

	$.fn.cycle.ver = function() { return ver; };

	// @see: http://malsup.com/jquery/cycle/lite/
	$.fn.cycle.defaults = {
		timeout:			1000,
		speed:				1000,
		next:					null,
		prev:					null,
		nav:					null,
		before:				null,
		after:				null,
		height:				'auto',
		sync:					1,
		fit:					0,
		pause:				1,
		delay:				0,
		control:			null,
		slideExpr:		null,
		stopOnManual:	null
	};

})(jQuery);