local _ = _;
local pairs = pairs;




local VUHDO_RAID;

function VUHDO_textProviderHandlersInitBurst()
	VUHDO_RAID = _G["VUHDO_RAID"];
end



--
VUHDO_TEXT_PROVIDER_COMBO_MODEL = { };
local VUHDO_REGISTERED_PROVIDERS = { };
local VUHDO_TEXT_INDICATOR_PANEL_NUMS = { };
local VUHDO_INTERESTED_PROVIDERS = { }



--
local function VUHDO_isTextProviderInterestedInEvent(aProviderName, anEventType)
	if not VUHDO_INTERESTED_PROVIDERS[aProviderName] then
		VUHDO_INTERESTED_PROVIDERS[aProviderName] = { };
	end

	if not VUHDO_INTERESTED_PROVIDERS[aProviderName][anEventType] then
		VUHDO_INTERESTED_PROVIDERS[aProviderName][anEventType] =
			VUHDO_tableGetKeyFromValue(VUHDO_TEXT_PROVIDERS[aProviderName]["interests"], anEventType) ~= nil
			and 1 or 0;
	end

	return 1 == VUHDO_INTERESTED_PROVIDERS[aProviderName][anEventType] or 1 == anEventType ; -- VUHDO_UPDATE_ALL
end



--
local tInfo;
local tText, tValue, tMaxValue;
local tEmpty = { };
function VUHDO_updateAllTextIndicatorsForEvent(aUnit, anEventType)
	tInfo = (VUHDO_RAID or tEmpty)[aUnit];
	if tInfo then

		for tProviderName, tAllIndicators in pairs(VUHDO_REGISTERED_PROVIDERS) do
			if VUHDO_isTextProviderInterestedInEvent(tProviderName, anEventType) then
				tValue, tMaxValue = VUHDO_TEXT_PROVIDERS[tProviderName]["calculator"](tInfo);
				tText = VUHDO_TEXT_PROVIDERS[tProviderName]["validator"](tInfo, tValue, tMaxValue);

				for tIndicatorName, tFunction in pairs(tAllIndicators) do
					tFunction(aUnit, VUHDO_TEXT_INDICATOR_PANEL_NUMS[tIndicatorName], tProviderName, tText, tValue);
				end

			end
		end
	elseif aUnit then

		for tProviderName, tAllIndicators in pairs(VUHDO_REGISTERED_PROVIDERS) do
			if VUHDO_isTextProviderInterestedInEvent(tProviderName, anEventType) then
				for tIndicatorName, tFunction in pairs(tAllIndicators) do
					tFunction(aUnit, VUHDO_TEXT_INDICATOR_PANEL_NUMS[tIndicatorName], tProviderName, "", 0);
				end
			end
		end

	end
end
local VUHDO_updateAllTextIndicatorsForEvent = VUHDO_updateAllTextIndicatorsForEvent;



--
function VUHDO_isAnyTextIndicatorInterestedIn(anEventType)
	for tProviderNameName, _ in pairs(VUHDO_REGISTERED_PROVIDERS) do
		if VUHDO_isTextProviderInterestedInEvent(tProviderNameName, anEventType) then
			return true;
		end
	end

	return false;
end



--
local function VUHDO_registerIndicatorForProvider(aProviderName, anIndicatorId, aPanelNum, aFunction)

	if VUHDO_strempty(aProviderName)
		or (aPanelNum > 0 and not VUHDO_isPanelPopulated(aPanelNum)) then
		return;
	end

	if not VUHDO_REGISTERED_PROVIDERS[aProviderName] then
		VUHDO_REGISTERED_PROVIDERS[aProviderName] = { };
	end

	VUHDO_REGISTERED_PROVIDERS[aProviderName][anIndicatorId] = aFunction;
	VUHDO_TEXT_INDICATOR_PANEL_NUMS[anIndicatorId] = aPanelNum;

	for tUnit, _ in pairs(VUHDO_RAID) do
		VUHDO_updateAllTextIndicatorsForEvent(tUnit, 1); -- VUHDO_UPDATE_ALL
	end
end



--
local function VUHDO_initTextProviderComboModel()
	table.wipe(VUHDO_TEXT_PROVIDER_COMBO_MODEL);

	for tName, tInfo in pairs(VUHDO_TEXT_PROVIDERS) do
		tinsert(VUHDO_TEXT_PROVIDER_COMBO_MODEL, { tName, tInfo["displayName"] });
	end

	table.sort(VUHDO_TEXT_PROVIDER_COMBO_MODEL,
		function(anEntry, anotherEntry)
			return anEntry[2] < anotherEntry[2];
		end
	);

	tinsert(VUHDO_TEXT_PROVIDER_COMBO_MODEL, 1, { "", "- empty / nothing -" });
end



--
local VUHDO_TEXT_INDICATOR_CALLBACKS = {
	["OVERHEAL_TEXT"] = "VUHDO_overhealTextCallback",
	["MANA_BAR"] = "VUHDO_manaBarTextCallback",
	["SIDE_LEFT"] = "VUHDO_sideLeftTextCallback",
	["SIDE_RIGHT"] = "VUHDO_sideRightTextCallback",
	["THREAT_BAR"] = "VUHDO_threatBarTextCallback",
}



--
function VUHDO_registerAllTextIndicators()
	table.wipe(VUHDO_REGISTERED_PROVIDERS);
	table.wipe(VUHDO_TEXT_INDICATOR_PANEL_NUMS);
	table.wipe(VUHDO_INTERESTED_PROVIDERS);

	for tIndicatorName, tIndicatorConfig in pairs(VUHDO_INDICATOR_CONFIG["TEXT_INDICATORS"]) do
		for tIndex, tProviderName in pairs(tIndicatorConfig["TEXT_PROVIDER"]) do
			VUHDO_registerIndicatorForProvider(tProviderName, tIndicatorName .. tIndex, tIndex,
				_G[VUHDO_TEXT_INDICATOR_CALLBACKS[tIndicatorName]]);
		end
	end

	VUHDO_initTextProviderComboModel();
end
