;(function($) {

function debug(s) {
	if ($.fn.cycle.debug)
		log(s);
}		
function log() {
	if (window.console && window.console.log)
		window.console.log('[cycle] ' + Array.prototype.join.call(arguments,' '));
};

$.fn.cycle = function(options, arg2) {
	var o = { s: this.selector, c: this.context };

	if (this.length === 0 && options != 'stop') {
		if (!$.isReady && o.s) {
			log('DOM not ready, queuing slideshow');
			$(function() {
				$(o.s,o.c).cycle(options,arg2);
			});
			return this;
		}
		log('terminating; zero elements found by selector' + ($.isReady ? '' : ' (DOM not ready)'));
		return this;
	}

	return this.each(function() {
		var opts = handleArguments(this, options, arg2);
		if (opts === false)
			return;

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

		var $cont = $(this);
		var $slides = opts.slideExpr ? $(opts.slideExpr, this) : $cont.children();
		var els = $slides.get();
		if (els.length < 2) {
			log('terminating; too few slides: ' + els.length);
			return;
		}

		var opts2 = buildOptions($cont, $slides, els, opts, o);
		if (opts2 === false)
			return;

		var startTime = opts2.continuous ? 10 : getTimeout(opts2.currSlide, opts2.nextSlide, opts2, !opts2.rev);

		if (startTime) {
			startTime += (opts2.delay || 0);
			if (startTime < 10)
				startTime = 10;
			debug('first timeout: ' + startTime);
			this.cycleTimeout = setTimeout(function(){go(els,opts2,0,!opts2.rev)}, startTime);
		}
	});
};

function handleArguments(cont, options, arg2) {
	return options;
};


function removeFilter(el, opts) {
	if (!$.support.opacity && opts.cleartype && el.style.filter) {
		try { el.style.removeAttribute('filter'); }
		catch(smother) {}
	}
};

function buildOptions($cont, $slides, els, options, o) {
	var opts = $.extend({}, $.fn.cycle.defaults, options || {}, $.metadata ? $cont.metadata() : $.meta ? $cont.data() : {});
	if (opts.autostop)
		opts.countdown = opts.autostopCount || els.length;

	var cont = $cont[0];
	$cont.data('cycle.opts', opts);
	opts.$cont = $cont;
	opts.stopCount = cont.cycleStop;
	opts.elements = els;
	opts.before = opts.before ? [opts.before] : [];
	opts.after = opts.after ? [opts.after] : [];
	opts.after.unshift(function(){ opts.busy=0; });

	if (!$.support.opacity && opts.cleartype && !opts.cleartypeNoBg)
		clearTypeFix($slides);

	var first = opts.startingSlide;

	$slides.css({position: 'absolute', top:0, left:0}).hide().each(function(i) {
		var z = first ? i >= first ? els.length - (i-first) : first-i : els.length-i;
		$(this).css('z-index', z)
	});

	$(els[first]).css('opacity',1).show();
	removeFilter(els[first], opts);

	if (opts.easing)
		opts.easeIn = opts.easeOut = opts.easing;
	if (!opts.speedIn)
		opts.speedIn = opts.speed;
	if (!opts.speedOut)
		opts.speedOut = opts.speed;

	opts.slideCount = els.length;
	opts.currSlide = opts.lastSlide = first;

	if (opts.random) {
		opts.nextSlide = opts.currSlide;
		if (++opts.randomIndex == els.length)
			opts.randomIndex = 0;
		opts.nextSlide = opts.randomMap[opts.randomIndex];
	}
	else
		opts.nextSlide = opts.startingSlide >= (els.length-1) ? 0 : opts.startingSlide+1;

	if (!opts.multiFx) {
		var init = $.fn.cycle.transitions[opts.fx];
		if ($.isFunction(init))
			init($cont, $slides, opts);
		else if (opts.fx != 'custom' && !opts.multiFx) {
			log('unknown transition: ' + opts.fx,'; slideshow terminating');
			return false;
		}
	}

	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.next)
		$(opts.next).bind(opts.prevNextEvent,function(){return advance(opts,opts.rev?-1:1)});
	if (opts.prev)
		$(opts.prev).bind(opts.prevNextEvent,function(){return advance(opts,opts.rev?1:-1)});
	if (opts.pager)
		buildPager(els,opts);

	exposeAddSlide(opts, els);

	return opts;
};

function saveOriginalOpts(opts) {
	opts.original = { before: [], after: [] };
	opts.original.cssBefore = $.extend({}, opts.cssBefore);
	opts.original.cssAfter  = $.extend({}, opts.cssAfter);
	opts.original.animIn	= $.extend({}, opts.animIn);
	opts.original.animOut   = $.extend({}, opts.animOut);
	$.each(opts.before, function() { opts.original.before.push(this); });
	$.each(opts.after,  function() { opts.original.after.push(this); });
};

function supportMultiTransitions(opts) {
	var i, tx, txs = $.fn.cycle.transitions;
	}

function exposeAddSlide(opts, els) {
	opts.addSlide = function(newSlide, prepend) {
		var $s = $(newSlide), s = $s[0];
		if (!opts.autostopCount)
			opts.countdown++;
		els[prepend?'unshift':'push'](s);
		if (opts.els)
			opts.els[prepend?'unshift':'push'](s);
		opts.slideCount = els.length;

		$s.css('position','absolute');
		$s[prepend?'prependTo':'appendTo'](opts.$cont);

		if (prepend) {
			opts.currSlide++;
			opts.nextSlide++;
		}

		if (!$.support.opacity && opts.cleartype && !opts.cleartypeNoBg)
			clearTypeFix($s);

		if (opts.fit && opts.width)
			$s.width(opts.width);
		if (opts.fit && opts.height && opts.height != 'auto')
			$slides.height(opts.height);
		s.cycleH = (opts.fit && opts.height) ? opts.height : $s.height();
		s.cycleW = (opts.fit && opts.width) ? opts.width : $s.width();

		$s.css(opts.cssBefore);

		if (opts.pager)
			$.fn.cycle.createPagerAnchor(els.length-1, s, $(opts.pager), els, opts);

		if ($.isFunction(opts.onAddSlide))
			opts.onAddSlide($s);
		else
			$s.hide();
	};
}

function go(els, opts, manual, fwd) {

	var p = opts.$cont[0], curr = els[opts.currSlide], next = els[opts.nextSlide];

	if (manual || !p.cyclePause) {

		if (opts.before.length)
			$.each(opts.before, function(i,o) {
				if (p.cycleStop != opts.stopCount) return;
				o.apply(next, [curr, next, opts, fwd]);
			});

		var after = function() {
			$.each(opts.after, function(i,o) {
				if (p.cycleStop != opts.stopCount) return;
				o.apply(next, [curr, next, opts, fwd]);
			});
		};

		if (opts.nextSlide != opts.currSlide) {
			opts.busy = 1;
			if (opts.fxFn)
				opts.fxFn(curr, next, opts, after, fwd);
			else if ($.isFunction($.fn.cycle[opts.fx]))
				$.fn.cycle[opts.fx](curr, next, opts, after);
			else
				$.fn.cycle.custom(curr, next, opts, after, manual && opts.fastOnEvent);
		}

		opts.lastSlide = opts.currSlide;
		if (opts.random) {
			opts.currSlide = opts.nextSlide;
			if (++opts.randomIndex == els.length)
				opts.randomIndex = 0;
			opts.nextSlide = opts.randomMap[opts.randomIndex];
		}
		else {
			var roll = (opts.nextSlide + 1) == els.length;
			opts.nextSlide = roll ? 0 : opts.nextSlide+1;
			opts.currSlide = roll ? els.length-1 : opts.nextSlide-1;
		}
	}

	var ms = 0;
	if (opts.timeout && !opts.continuous)
		ms = getTimeout(curr, next, opts, fwd);
	else if (opts.continuous && p.cyclePause)
		ms = 10;
	if (ms > 0)
		p.cycleTimeout = setTimeout(function(){ go(els, opts, 0, !opts.rev) }, ms);
};

function getTimeout(curr, next, opts, fwd) {
	if (opts.timeoutFn) {
		var t = opts.timeoutFn(curr,next,opts,fwd);
		while ((t - opts.speed) < 250)
			t += opts.speed;
		debug('calculated timeout: ' + t + '; speed: ' + opts.speed);
		if (t !== false)
			return t;
	}
	return opts.timeout;
};

function clearTypeFix($slides) {
	function hex(s) {
		s = parseInt(s).toString(16);
		return s.length < 2 ? '0'+s : s;
	};
	function getBg(e) {
		for ( ; e && e.nodeName.toLowerCase() != 'html'; e = e.parentNode) {
			var v = $.css(e,'background-color');
			if (v.indexOf('rgb') >= 0 ) {
				var rgb = v.match(/\d+/g);
				return '#'+ hex(rgb[0]) + hex(rgb[1]) + hex(rgb[2]);
			}
			if (v && v != 'transparent')
				return v;
		}
		return '#ffffff';
	};
	$slides.each(function() { $(this).css('background-color', getBg(this)); });
};

$.fn.cycle.commonReset = function(curr,next,opts,w,h,rev) {
	$(opts.elements).not(curr).hide();
	opts.cssBefore.opacity = 1;
	opts.cssBefore.display = 'block';
	if (w !== false && next.cycleW > 0)
		opts.cssBefore.width = next.cycleW;
	if (h !== false && next.cycleH > 0)
		opts.cssBefore.height = next.cycleH;
	opts.cssAfter = opts.cssAfter || {};
	opts.cssAfter.display = 'none';
	$(curr).css('zIndex',opts.slideCount + (rev === true ? 1 : 0));
	$(next).css('zIndex',opts.slideCount + (rev === true ? 0 : 1));
};

$.fn.cycle.custom = function(curr, next, opts, cb, speedOverride) {
	var $l = $(curr), $n = $(next);
	var speedIn = opts.speedIn, speedOut = opts.speedOut, easeIn = opts.easeIn, easeOut = opts.easeOut;
	$n.css(opts.cssBefore);
	if (speedOverride) {
		if (typeof speedOverride == 'number')
			speedIn = speedOut = speedOverride;
		else
			speedIn = speedOut = 1;
		easeIn = easeOut = null;
	}
	var fn = function() {$n.animate(opts.animIn, speedIn, easeIn, cb)};
	$l.animate(opts.animOut, speedOut, easeOut, function() {
		if (opts.cssAfter) $l.css(opts.cssAfter);
		if (!opts.sync) fn();
	});
	if (opts.sync) fn();
};

$.fn.cycle.transitions = {
	fade: function($cont, $slides, opts) {
		$slides.not(':eq('+opts.currSlide+')').css('opacity',0);
		opts.before.push(function(curr,next,opts) {
			$.fn.cycle.commonReset(curr,next,opts);
			opts.cssBefore.opacity = 0;
		});
		opts.animIn	   = { opacity: 1 };
		opts.animOut   = { opacity: 0 };
		opts.cssBefore = { top: 0, left: 0 };
	}
};

$.fn.cycle.defaults = {
	fx:			  'fade',
	timeout:	   4000,
	continuous:	   0,
	speed:		   1000,
	startingSlide: 0,
	sync:		   1,
	random:		   0,
	cleartype:	   !$.support.opacity,
	requeueOnImageNotLoaded: true,
	requeueTimeout: 250
};

})(jQuery);