var IE6,

/*
 * BGIFrame adaption (http://plugins.jquery.com/project/bgiframe)
 * Special thanks to Brandon Aaron
 */
BGIFRAME = '<iframe class="qtip-bgiframe" frameborder="0" tabindex="-1" src="javascript:\'\';" ' +
	' style="display:block; position:absolute; z-index:-1; filter:alpha(opacity=0); ' +
		'-ms-filter:"progid:DXImageTransform.Microsoft.Alpha(Opacity=0)";"></iframe>';

function Ie6(api, qtip) {
	this._ns = 'ie6';
	this.init( (this.qtip = api) );
}

$.extend(Ie6.prototype, {
	_scroll : function() {
		var overlay = this.qtip.elements.overlay;
		overlay && (overlay[0].style.top = $(window).scrollTop() + 'px');
	},

	init: function(qtip) {
		var tooltip = qtip.tooltip,
			scroll;

		// Create the BGIFrame element if needed
		if($('select, object').length < 1) {
			this.bgiframe = qtip.elements.bgiframe = $(BGIFRAME).appendTo(tooltip);

			// Update BGIFrame on tooltip move
			qtip._bind(tooltip, 'tooltipmove', this.adjustBGIFrame, this._ns, this);
		}

		// redraw() container for width/height calculations
		this.redrawContainer = $('<div/>', { id: NAMESPACE+'-rcontainer' })
			.appendTo(document.body);

		// Fixup modal plugin if present too
		if( qtip.elements.overlay && qtip.elements.overlay.addClass('qtipmodal-ie6fix') ) {
			qtip._bind(window, ['scroll', 'resize'], this._scroll, this._ns, this);
			qtip._bind(tooltip, ['tooltipshow'], this._scroll, this._ns, this);
		}

		// Set dimensions
		this.redraw();
	},

	adjustBGIFrame: function() {
		var tooltip = this.qtip.tooltip,
			dimensions = {
				height: tooltip.outerHeight(FALSE),
				width: tooltip.outerWidth(FALSE)
			},
			plugin = this.qtip.plugins.tip,
			tip = this.qtip.elements.tip,
			tipAdjust, offset;

		// Adjust border offset
		offset = parseInt(tooltip.css('borderLeftWidth'), 10) || 0;
		offset = { left: -offset, top: -offset };

		// Adjust for tips plugin
		if(plugin && tip) {
			tipAdjust = (plugin.corner.precedance === 'x') ? [WIDTH, LEFT] : [HEIGHT, TOP];
			offset[ tipAdjust[1] ] -= tip[ tipAdjust[0] ]();
		}

		// Update bgiframe
		this.bgiframe.css(offset).css(dimensions);
	},

	// Max/min width simulator function
	redraw: function() {
		if(this.qtip.rendered < 1 || this.drawing) { return this; }

		var tooltip = this.qtip.tooltip,
			style = this.qtip.options.style,
			container = this.qtip.options.position.container,
			perc, width, max, min;

		// Set drawing flag
		this.qtip.drawing = 1;

		// If tooltip has a set height/width, just set it... like a boss!
		if(style.height) { tooltip.css(HEIGHT, style.height); }
		if(style.width) { tooltip.css(WIDTH, style.width); }

		// Simulate max/min width if not set width present...
		else {
			// Reset width and add fluid class
			tooltip.css(WIDTH, '').appendTo(this.redrawContainer);

			// Grab our tooltip width (add 1 if odd so we don't get wrapping problems.. huzzah!)
			width = tooltip.width();
			if(width % 2 < 1) { width += 1; }

			// Grab our max/min properties
			max = tooltip.css('maxWidth') || '';
			min = tooltip.css('minWidth') || '';

			// Parse into proper pixel values
			perc = (max + min).indexOf('%') > -1 ? container.width() / 100 : 0;
		max = ((max.indexOf('%') > -1 ? perc : 1) * parseInt(max, 10)) || width;
			min = ((min.indexOf('%') > -1 ? perc : 1) * parseInt(min, 10)) || 0;

			// Determine new dimension size based on max/min/current values
			width = max + min ? Math.min(Math.max(width, min), max) : width;

			// Set the newly calculated width and remvoe fluid class
			tooltip.css(WIDTH, Math.round(width)).appendTo(container);
		}

		// Set drawing flag
		this.drawing = 0;

		return this;
	},

	destroy: function() {
		// Remove iframe
		this.bgiframe && this.bgiframe.remove();

		// Remove bound events
		this.qtip._unbind([window, this.qtip.tooltip], this._ns);
	}
});

IE6 = PLUGINS.ie6 = function(api) {
	// Proceed only if the browser is IE6
	return BROWSER.ie === 6 ? new Ie6(api) : FALSE;
};

IE6.initialize = 'render';

CHECKS.ie6 = {
	'^content|style$': function() {
		this.redraw();
	}
};
