--[[ Element: Raid Icon

 Handles updating and toggles visibility of raid target icons.

 Widget

 RaidIcon - A Texture used to display the raid target icon.

 Notes

 This element updates by changing the texture.

 The default raid icons will be used if the UI widget is a texture and doesn't
 have a texture or color defined.

 Examples

   -- Position and size
   local RaidIcon = self:CreateTexture(nil, 'OVERLAY')
   RaidIcon:SetSize(16, 16)
   RaidIcon:SetPoint('TOPRIGHT', self)
   
   -- Register it with oUF
   self.RaidIcon = RaidIcon

 Hooks

 Override(self) - Used to completely override the internal update function.
                  Removing the table key entry will make the element fall-back
                  to its internal function again.
]]

local parent, ns = ...
local oUF = ns.oUF

local GetRaidTargetIndex = GetRaidTargetIndex
local SetRaidTargetIconTexture = SetRaidTargetIconTexture

local Update = function(self, event)
	local icon = self.RaidIcon
	if(icon.PreUpdate) then
		icon:PreUpdate()
	end

	local index = GetRaidTargetIndex(self.unit)
	if(index) then
		SetRaidTargetIconTexture(icon, index)
		icon:Show()
	else
		icon:Hide()
	end

	if(icon.PostUpdate) then
		return icon:PostUpdate(index)
	end
end

local Path = function(self, ...)
	return (self.RaidIcon.Override or Update) (self, ...)
end

local ForceUpdate = function(element)
	if(not element.__owner.unit) then return end
	return Path(element.__owner, 'ForceUpdate')
end

local Enable = function(self)
	local ricon = self.RaidIcon
	if(ricon) then
		ricon.__owner = self
		ricon.ForceUpdate = ForceUpdate

		self:RegisterEvent("RAID_TARGET_UPDATE", Path, true)

		if(ricon:IsObjectType"Texture" and not ricon:GetTexture()) then
			ricon:SetTexture[[Interface\TargetingFrame\UI-RaidTargetingIcons]]
		end

		return true
	end
end

local Disable = function(self)
	local ricon = self.RaidIcon
	if(ricon) then
		ricon:Hide()
		self:UnregisterEvent("RAID_TARGET_UPDATE", Path)
	end
end

oUF:AddElement('RaidIcon', Path, Enable, Disable)
