VUHDO_MAY_DEBUFF_ANIM = true;

local VUHDO_DEBUFF_ICONS = { };
local sIsName;

-- BURST CACHE ---------------------------------------------------

local floor = floor;
local GetTime = GetTime;
local pairs = pairs;
local twipe = table.wipe;
local _;
local huge = math.huge;

local _G = getfenv();

local VUHDO_getUnitButtons;
local VUHDO_getUnitButtonsSafe;
local VUHDO_getBarIconTimer
local VUHDO_getBarIconCounter;
local VUHDO_getBarIconFrame;
local VUHDO_getBarIcon;
local VUHDO_getBarIconName;
local VUHDO_getShieldPerc;

local VUHDO_CONFIG;
local sCuDeStoredSettings;
local sMaxIcons;
local sStaticConfig;

local sEmpty = { };

function VUHDO_customDebuffIconsInitLocalOverrides()
	-- functions
	VUHDO_getUnitButtons = _G["VUHDO_getUnitButtons"];
	VUHDO_getBarIconTimer = _G["VUHDO_getBarIconTimer"];
	VUHDO_getBarIconCounter = _G["VUHDO_getBarIconCounter"];
	VUHDO_getBarIconFrame = _G["VUHDO_getBarIconFrame"];
	VUHDO_getBarIcon = _G["VUHDO_getBarIcon"];
	VUHDO_getBarIconName = _G["VUHDO_getBarIconName"];
	VUHDO_getShieldPerc = _G["VUHDO_getShieldPerc"];
	VUHDO_getUnitButtonsSafe = _G["VUHDO_getUnitButtonsSafe"];

	VUHDO_CONFIG = _G["VUHDO_CONFIG"];
	sCuDeStoredSettings = VUHDO_CONFIG["CUSTOM_DEBUFF"]["STORED_SETTINGS"];
	sMaxIcons = VUHDO_CONFIG["CUSTOM_DEBUFF"]["max_num"];
	if (sMaxIcons < 1) then -- Damit das Bouquet item "Letzter Debuff" funktioniert
		sMaxIcons = 1;
	end
	sIsName = VUHDO_CONFIG["CUSTOM_DEBUFF"]["isName"];

	sStaticConfig = {
		["animate"] = VUHDO_CONFIG["CUSTOM_DEBUFF"]["animate"],
		["timer"] = VUHDO_CONFIG["CUSTOM_DEBUFF"]["timer"],
		["isStacks"] = VUHDO_CONFIG["CUSTOM_DEBUFF"]["isStacks"],
		["isAliveTime"] = false,
		["isFullDuration"] = false
	};

end

----------------------------------------------------

--
local tAliveTime;
local tRemain;
local tStacks;
local tCuDeStoConfig;
local tNameLabel;
local tTimeStamp;
local tShieldPerc;
local tName;
local tButton;
local tIsAnim;
local function VUHDO_animateDebuffIcon(aButton, anIconInfo, aNow, anIconIndex, anIsInit, aUnit)

	tCuDeStoConfig = sCuDeStoredSettings[anIconInfo[3]] or sCuDeStoredSettings[tostring(anIconInfo[7])] or sStaticConfig;
	tIsAnim = tCuDeStoConfig["animate"] and VUHDO_MAY_DEBUFF_ANIM;
	tTimeStamp = anIconInfo[2];
	tAliveTime = anIsInit and 0 or aNow - tTimeStamp;
	tName = anIconInfo[3];

	if tCuDeStoConfig["timer"] then
		if tCuDeStoConfig["isAliveTime"] then
			VUHDO_getBarIconTimer(aButton, anIconIndex):SetText(tAliveTime < 99.5 and floor(tAliveTime + 0.5) or ">>");
		else
			tRemain = (anIconInfo[4] or aNow - 1) - aNow;

			if tRemain >= 0 and (tRemain < 10 or tCuDeStoConfig["isFullDuration"]) then
				VUHDO_getBarIconTimer(aButton, anIconIndex):SetText(tRemain > 100 and ">>" or floor(tRemain));
			else
				VUHDO_getBarIconTimer(aButton, anIconIndex):SetText("");
			end
		end
	end

	tShieldPerc = VUHDO_getShieldPerc(aUnit, tName);
	tStacks = tShieldPerc ~= 0 and tShieldPerc or anIconInfo[5] or 0;

	VUHDO_getBarIconCounter(aButton, anIconIndex):SetText((tCuDeStoConfig["isStacks"] and tStacks > 1) and tStacks or "");

	if anIsInit then
		VUHDO_getBarIcon(aButton, anIconIndex):SetTexture(anIconInfo[1]);
		if sIsName then
			tNameLabel = VUHDO_getBarIconName(aButton, anIconIndex);
			tNameLabel:SetText(tName);
			tNameLabel:SetAlpha(1);
		end
		VUHDO_getBarIconFrame(aButton, anIconIndex):SetAlpha(1);

		if tIsAnim then VUHDO_setDebuffAnimation(1.2); end
	elseif VUHDO_getBarIcon(aButton, anIconIndex):GetTexture() ~= anIconInfo[1] then
		VUHDO_getBarIcon(aButton, anIconIndex):SetTexture(anIconInfo[1]);
		VUHDO_getBarIconFrame(aButton, anIconIndex):SetAlpha(1);

		VUHDO_updateHealthBarsFor(aUnit, VUHDO_UPDATE_RANGE);
	end

	if tIsAnim then
		tButton = VUHDO_getBarIconButton(aButton, anIconIndex);
		if tAliveTime <= 0.4 then	tButton:SetScale(1 + tAliveTime * 2.5);
		elseif tAliveTime <= 0.6 then -- Keep size
		elseif tAliveTime <= 1.1 then tButton:SetScale(3.2 - 2 * tAliveTime);
		else tButton:SetScale(1);	end
	else -- Falls Custom Debuff vorher Animation hatte und dieser nicht
		VUHDO_getBarIconButton(aButton, anIconIndex):SetScale(1);
	end

	if sIsName and tAliveTime > 2 then
		VUHDO_getBarIconName(aButton, anIconIndex):SetAlpha(0);
	end
end



--
local tNow;
function VUHDO_updateAllDebuffIcons(anIsFrequent)
	tNow = GetTime();

	for tUnit, tAllDebuffInfos in pairs(VUHDO_DEBUFF_ICONS) do
		for tIndex, tDebuffInfo in pairs(tAllDebuffInfos) do
			if not anIsFrequent or tDebuffInfo[2] + 1.21 >= tNow then
				for _, tButton in pairs(VUHDO_getUnitButtonsSafe(tUnit)) do
					VUHDO_animateDebuffIcon(tButton, tDebuffInfo, tNow, tIndex + 39, false, tUnit);
				end
			end
		end

	end
end



-- 1 = icon, 2 = timestamp, 3 = name, 4 = expiration time, 5 = stacks, 6 = Duration, 7 = Start time
local tSlot;
local tOldest;
local tTimestamp;
local tFrame, tIconInfo;
function VUHDO_addDebuffIcon(aUnit, anIcon, aName, anExpiry, aStacks, aDuration, anIsBuff, aSpellId)
	if not VUHDO_DEBUFF_ICONS[aUnit] then
		VUHDO_DEBUFF_ICONS[aUnit] = { };
	end

	tOldest = huge;
	tSlot = 1;
	for tCnt = 1, sMaxIcons do
		if not VUHDO_DEBUFF_ICONS[aUnit][tCnt] then	tSlot = tCnt;	break;
		else
			tTimestamp = VUHDO_DEBUFF_ICONS[aUnit][tCnt][2];
			if tTimestamp > 0 and tTimestamp < tOldest then
				tOldest = tTimestamp;
				tSlot = tCnt;
			end
		end
	end
	tIconInfo = { anIcon, -1, aName, anExpiry, aStacks, aDuration, aSpellId };
	VUHDO_DEBUFF_ICONS[aUnit][tSlot] = tIconInfo;

	for _, tButton in pairs(VUHDO_getUnitButtonsSafe(aUnit)) do
		VUHDO_animateDebuffIcon(tButton, tIconInfo, GetTime(), tSlot + 39, true, aUnit);
		tFrame = VUHDO_getBarIconFrame(tButton, tSlot + 39);
		tFrame["debuffInfo"], tFrame["isBuff"] = aName, anIsBuff;
	end
	tIconInfo[2] = GetTime();

	VUHDO_updateHealthBarsFor(aUnit, VUHDO_UPDATE_RANGE);
end



--
local tIconInfo;
function VUHDO_updateDebuffIcon(aUnit, anIcon, aName, anExpiry, aStacks, aDuration)
	if not VUHDO_DEBUFF_ICONS[aUnit] then
		VUHDO_DEBUFF_ICONS[aUnit] = { };
	end

	for tCnt = 1, sMaxIcons do
		tIconInfo = VUHDO_DEBUFF_ICONS[aUnit][tCnt];

		if tIconInfo and tIconInfo[3] == aName then
			tIconInfo[1], tIconInfo[4], tIconInfo[5], tIconInfo[6] = anIcon, anExpiry, aStacks, aDuration;
		end
	end
end



--
local tAllButtons2;
local tFrame;
function VUHDO_removeDebuffIcon(aUnit, aName)
	tAllButtons2 = VUHDO_getUnitButtons(aUnit);
	if not tAllButtons2 then return; end

	for tCnt2 = 1, sMaxIcons do
		if (VUHDO_DEBUFF_ICONS[aUnit][tCnt2] or sEmpty)[3] == aName then
			VUHDO_DEBUFF_ICONS[aUnit][tCnt2][2] = 1; -- ~= -1, lock icon to not be processed by onupdate
			for _, tButton2 in pairs(tAllButtons2) do
				tFrame = VUHDO_getBarIconFrame(tButton2, tCnt2 + 39);
				if tFrame then
					tFrame:SetAlpha(0);
					tFrame["debuffInfo"] = nil;
				end
			end

			twipe(VUHDO_DEBUFF_ICONS[aUnit][tCnt2]);
			VUHDO_DEBUFF_ICONS[aUnit][tCnt2] = nil;
		end
	end
end



--
local tAllButtons3;
local tFrame;
function VUHDO_removeAllDebuffIcons(aUnit)
	tAllButtons3 = VUHDO_getUnitButtons(aUnit);
	if not tAllButtons3 then return; end

	for _, tButton3 in pairs(tAllButtons3) do
		for tCnt3 = 40, 39 + sMaxIcons do
			tFrame = VUHDO_getBarIconFrame(tButton3, tCnt3);
			if tFrame then
				tFrame:SetAlpha(0);
				tFrame["debuffInfo"] = nil;
			end
		end
	end

	if VUHDO_DEBUFF_ICONS[aUnit] then	twipe(VUHDO_DEBUFF_ICONS[aUnit]); end
	VUHDO_updateBouquetsForEvent(aUnit, 29);
end



--
local tDebuffInfo;
local tCurrInfo;
function VUHDO_getLatestCustomDebuff(aUnit)
	tDebuffInfo = sEmpty;

	for tCnt = 1, sMaxIcons do
	  tCurrInfo = (VUHDO_DEBUFF_ICONS[aUnit] or sEmpty)[tCnt];
		if tCurrInfo and tCurrInfo[2] > (tDebuffInfo[2] or 0) then
			tDebuffInfo = tCurrInfo;
		end
	end

	return tDebuffInfo[1], tDebuffInfo[4], tDebuffInfo[5], tDebuffInfo[6];
end
