local VUHDO_RAID = { };
local VUHDO_RAID_GUIDS = { };
local VUHDO_INTERNAL_TOGGLES = { };

local strsplit = strsplit;
local pairs = pairs;

local VUHDO_updateHealth;
local sCurrentTarget = nil;
local sCurrentFocus = nil;



--
function VUHDO_combatLogInitLocalOverrides()
	VUHDO_RAID = _G["VUHDO_RAID"];
	VUHDO_RAID_GUIDS = _G["VUHDO_RAID_GUIDS"];
	VUHDO_INTERNAL_TOGGLES = _G["VUHDO_INTERNAL_TOGGLES"];
	VUHDO_updateHealth = _G["VUHDO_updateHealth"];
end



--
local tInfo;
local tNewHealth;
local tDeadInfo = { ["dead"] = true };
local function VUHDO_addUnitHealth(aUnit, aDelta)
	tInfo = VUHDO_RAID[aUnit] or tDeadInfo;

	if not tInfo["dead"] then
		tNewHealth = tInfo["health"] + aDelta;

		if tNewHealth < 0 then tNewHealth = 0;
		elseif tNewHealth > tInfo["healthmax"]  then tNewHealth = tInfo["healthmax"]; end

		if tInfo["health"] ~= tNewHealth then
			tInfo["health"] = tNewHealth;
			VUHDO_updateHealth(aUnit, 2); -- VUHDO_UPDATE_HEALTH
		end
	end
end



--
local tPre, tSuf, tSpec;
local function VUHDO_getTargetHealthImpact(aMsg, aMsg1, aMsg2, aMsg4)
	tPre, tSuf, tSpec = strsplit("_", aMsg);

	if "SPELL" == tPre then
		if ("HEAL" == tSuf or "HEAL" == tSpec) and "MISSED" ~= tSpec then 
			return aMsg4;
		elseif "DAMAGE" == tSuf or "DAMAGE" == tSpec then 
			return -aMsg4; 
		end
	elseif "DAMAGE" == tSuf then
		if "SWING" == tPre then	
			return -aMsg1;
		elseif "RANGE" == tPre then 
			return -aMsg4;
		elseif "ENVIRONMENTAL" == tPre then 
			return -aMsg2;
		end
	elseif "DAMAGE" == tPre and "MISSED" ~= tSpec and "RESISTED" ~= tSpec then 
		return -aMsg4; 
	end

	return 0;
end



--
function VUHDO_clParserSetCurrentTarget(aUnit)
	sCurrentTarget = VUHDO_INTERNAL_TOGGLES[27] and aUnit or "*"; -- VUHDO_UPDATE_PLAYER_TARGET
end



--
function VUHDO_clParserSetCurrentFocus()
	sCurrentFocus = nil;

	for tUnit, tInfo in pairs(VUHDO_RAID) do
		if UnitIsUnit("focus", tUnit) and tUnit ~= "focus" and tUnit ~= "target" then
			if tInfo["isPet"] and (VUHDO_RAID[tInfo["ownerUnit"]] or {})["isVehicle"] then
				sCurrentFocus = tInfo["ownerUnit"];
			else
				sCurrentFocus = tUnit;
			end
			break;
		end
	end

end



--
local tUnit;
local tImpact;
function VUHDO_parseCombatLogEvent(aMsg, aDstGUID, aMsg1, aMsg2, aMsg4)
	tUnit = VUHDO_RAID_GUIDS[aDstGUID];
	if not tUnit then return; end

	-- as of patch 7.1 we are seeing empty values on health related events
	tImpact = tonumber(VUHDO_getTargetHealthImpact(aMsg, aMsg1, aMsg2, aMsg4)) or 0;

	if tImpact ~= 0 then
		VUHDO_addUnitHealth(tUnit, tImpact);
		if tUnit == sCurrentTarget then	VUHDO_addUnitHealth("target", tImpact);	end
		if tUnit == sCurrentFocus then VUHDO_addUnitHealth("focus", tImpact); end
	end
end



--
function VUHDO_getCurrentPlayerFocus()
	return sCurrentFocus;
end
