GLUETOOLTIP_NUM_LINES = 4;
GLUETOOLTIP_HPADDING = 20;

function GlueTooltip_OnLoad(self)
	self.Clear = GlueTooltip_Clear;
	self.SetFont = GlueTooltip_SetFont;
	self.AddLine = GlueTooltip_AddLine;
	self.SetText = GlueTooltip_SetText;
	self.SetOwner = GlueTooltip_SetOwner;
	self.GetOwner = GlueTooltip_GetOwner;
	self:SetBackdropBorderColor(1.0, 1.0, 1.0);
	self:SetBackdropColor(0.09, 0.09, 0.19 );
	self.defaultColor = NORMAL_FONT_COLOR;
end

-- TODO: It would be nice if the syntax for this matched GameTooltip
function GlueTooltip_SetOwner(self, owner, xOffset, yOffset, myPoint, ownerPoint)
	if ( not self or not owner) then
		return;
	end
	xOffset = xOffset or 0;
	yOffset = yOffset or 0;
	myPoint = myPoint or "BOTTOMLEFT";
	ownerPoint = ownerPoint or "TOPRIGHT";
	self.owner = owner;
	self:SetPoint(myPoint, owner, ownerPoint, xOffset, yOffset);
	self:Show();
end

function GlueTooltip_GetOwner()
	return self.owner;
end

function GlueTooltip_SetText(self, text, r, g, b, a, wrap)
	self:Clear();
	self:AddLine(text, r, g, b, a, wrap);
end

function GlueTooltip_SetFont(self, font)
	for i = 1, GLUETOOLTIP_NUM_LINES do
		local textString = _G[self:GetName().."TextLeft"..i];
		textString:SetFontObject(font);
		textString = _G[self:GetName().."TextRight"..i];
		textString:SetFontObject(font);
	end
end

function GlueTooltip_Clear(self)
	for i = 1, GLUETOOLTIP_NUM_LINES do
		local textString = _G[self:GetName().."TextLeft"..i];
		textString:SetText("");
		textString:Hide();
		textString:SetWidth(0);
		textString = _G[self:GetName().."TextRight"..i];
		textString:SetText("");
		textString:Hide();
		textString:SetWidth(0);
	end
	self:SetWidth(1);
	self:SetHeight(1);
end

function GlueTooltip_AddLine(self, text, r, g, b, a, wrap)
	r = r or self.defaultColor.r;
	g = g or self.defaultColor.g;
	b = b or self.defaultColor.b;
	a = a or 1;
	-- find a free line
	local freeLine;
	for i = 1, GLUETOOLTIP_NUM_LINES do
		local line = _G[self:GetName().."TextLeft"..i];
		if ( not line:IsShown() ) then
			freeLine = line;
			break;
		end
	end
	
	if (not freeLine) then return; end
	
	freeLine:SetTextColor(r, g, b, a);
	freeLine:SetText(text); 
	freeLine:Show();
	freeLine:SetWidth(0);

	local wrapWidth = 230;
	if (wrap and freeLine:GetWidth() > wrapWidth and self:GetWidth() < wrapWidth+GLUETOOLTIP_HPADDING) then
	
		-- Trim the right edge so that there isn't extra space after wrapping
		freeLine:SetWidth(wrapWidth);
		wrapWidth = freeLine:GetWrappedWidth();

		self:SetWidth(max(self:GetWidth(), wrapWidth+GLUETOOLTIP_HPADDING));
	else
		self:SetWidth(max(self:GetWidth(), freeLine:GetWidth()+GLUETOOLTIP_HPADDING));
	end
	
	-- Compute height and update width of text lines
	local height = 18;
	for i = 1, GLUETOOLTIP_NUM_LINES do
		-- Update width of all lines
		local line = _G[self:GetName().."TextLeft"..i];
		local rightLine = _G[self:GetName().."TextRight"..i];
		if (not rightLine:IsShown()) then
			line:SetWidth(self:GetWidth()-GLUETOOLTIP_HPADDING);
		end
		
		-- Update the height of the frame
		if ( line:IsShown() ) then
			height = height + line:GetHeight() + 2;
		end
	end
	self:SetHeight(height);
end