BigBrother = {}
BigBrother.title = GetAddOnMetadata("BigBrother", "Title")
BigBrother.version = GetAddOnMetadata("BigBrother", "Version")
BigBrother.author = GetAddOnMetadata("BigBrother", "Author")
BigBrother.Items = {}
print(("Loaded %s v%s by %s."):format(BigBrother.title, BigBrother.version, BigBrother.author))

BigBrotherDB = {}  -- default value, will be overwritten by the game if persistent data exists

local weaponEnchantments = {
	["Sharpen Weapon - Critical"] = {22756, 1800},  -- Elemental Sharpening Stone
	["Sharpen Blade V"] = {16622, 1800},  -- Dense Sharpening Stone
	["Enhance Blunt Weapon V"] = {16622, 1800},  -- Dense Weightstone
	["Brilliant Wizard Oil"] = {25122, 1800},
	["Brilliant Mana Oil"] = {25123, 1800},
}
local unitWeaponBuffs = {}

local frame, events = CreateFrame("FRAME"), {};
function events:ENCOUNTER_START(encounterID, encounterName, difficultyID, groupSize)
	if not IsInRaid() then
		return
	end

	-- remove expired weapon enchantments
	local time = GetTime()
	for name, v in pairs(unitWeaponBuffs) do
		local weaponEnchantmentSpellId, weaponEnchantmentExpireTime = unpack(v)
		if time > weaponEnchantmentExpireTime then
			unitWeaponBuffs[name] = nil
		end
	end

	local classBuffs = {}
	for className, _ in pairs(RAID_CLASS_COLORS) do
		classBuffs[className] = {}
	end
	for m = 1, GetNumGroupMembers() do
		local unit = "raid" .. m
		local name = UnitName(unit)
		local unitBuffs = {}
		for b = 1, 40 do
			_, _, _, _, _, _, _, _, _, spellId = UnitBuff(unit, b)
			if not spellId then
				break
			end
			unitBuffs[b] = spellId
		end
		if unitWeaponBuffs[name] ~= nil then
			local weaponEnchantmentSpellId, weaponEnchantmentExpireTime = unpack(unitWeaponBuffs[name])
			table.insert(unitBuffs, weaponEnchantmentSpellId)
		end
		local _, className = UnitClass(unit)
		classBuffs[className][name] = unitBuffs
	end

	table.insert(BigBrotherDB, {
		date = date("%F %T"),
		zone = GetRealZoneText(),
		encounterID = encounterID,
		encounterName = encounterName,
		buffs = classBuffs,
	})
end

function events:COMBAT_LOG_EVENT_UNFILTERED(...)
	local _, event, _, _, name, _, _, _, _, _, _, _, spellName = CombatLogGetCurrentEventInfo()
	if event ~= "SPELL_CAST_SUCCESS" then
		return
	end
	if weaponEnchantments[spellName] ~= nil then
		local weaponEnchantmentSpellId, weaponEnchantmentDuration = unpack(weaponEnchantments[spellName])
		unitWeaponBuffs[name] = {weaponEnchantmentSpellId, GetTime() + weaponEnchantmentDuration}
	end
end

frame:SetScript("OnEvent", function(self, event, ...)
	events[event](self, ...)
end)
for k, v in pairs(events) do
	frame:RegisterEvent(k) -- register all events for which handlers have been defined
end