local _, data = ...
---@cast data HeimdallData

if not data.config.spotter.enabled then return end

local function FormatHP(hp)
	if hp > 1e9 then
		return string.format("%.1fB", hp / 1e9)
	elseif hp > 1e6 then
		return string.format("%.1fM", hp / 1e6)
	elseif hp > 1e3 then
		return string.format("%.1fK", hp / 1e3)
	else
		return hp
	end
end

---@type table<string, number>
local throttleTable = {}

---@param unit string
---@return string?
local function NotifySpotted(unit)
	if not unit then return string.format("Could not find unit %s", tostring(unit)) end
	if not UnitIsPlayer(unit) then return nil end

	local name = UnitName(unit)
	if not name then return string.format("Could not find name for unit %s", tostring(unit)) end

	local time = GetTime()
	if throttleTable[name] and time - throttleTable[name] < data.config.spotter.throttleTime then
		return string.format("Throttled %s", tostring(name))
	end
	throttleTable[name] = time

	local race = UnitRace(unit)
	if not race then return string.format("Could not find race for unit %s", tostring(unit)) end
	local faction = data.raceMap[race]
	if not faction then return string.format("Could not find faction for race %s", tostring(race)) end

	local doNotify = true
	if data.config.spotter.allyOnly then
		doNotify = false
		if faction == "Alliance" then doNotify = true end
	end
	if data.config.spotter.stinkyOnly then
		doNotify = false
		if data.stinkies[name] then doNotify = true end
	end
	if not doNotify then return string.format("Not notifying %s", tostring(name)) end

	local hp = UnitHealth(unit)
	if not hp then return string.format("Could not find hp for unit %s", tostring(unit)) end

	local maxHp = UnitHealthMax(unit)
	if not maxHp then return string.format("Could not find maxHp for unit %s", tostring(unit)) end

	local location = data.config.spotter.zoneOverride
	if not location then
		local zone = GetZoneText()
		if not zone then return string.format("Could not find zone for unit %s", tostring(unit)) end
		local subzone = GetSubZoneText()
		if not subzone then subzone = "" end
		location = string.format("%s (%s)", zone, subzone)
	end

	local text = string.format("I see %s of race (%s) with health %s/%s at %s", name, race, FormatHP(hp), FormatHP(maxHp), location)
	---@type Message
	local msg = {
		channel = "CHANNEL",
		data = data.config.spotter.notifyChannel,
		message = text
	}
	table.insert(data.messenger.queue, msg)
end

local frame = CreateFrame("Frame")
frame:RegisterEvent("NAME_PLATE_UNIT_ADDED")
frame:RegisterEvent("TARGET_UNIT_CHANGED")
frame:SetScript("OnEvent", function(self, event, unit)
	local err = NotifySpotted(unit)
	if err then
		print(string.format("Error notifying %s: %s", tostring(unit), tostring(err)))
	end
end)