local cloneref = cloneref or function(obj) return obj end
local replicatedStorage = cloneref(game:GetService('ReplicatedStorage'))

local MatchUI = replicatedStorage.Remotes.MatchUI
local SubmitWord = replicatedStorage.Remotes.SubmitWord
local BillboardUpdate = replicatedStorage.Remotes.BillboardUpdate

local Used, Prefix, CurrentLetter = {}, {}, nil
local Answered, Ready = false, false
local Round = 1

task.spawn(function()
	if not shared.kbbiwords then
		local Ok, Res = pcall(game.HttpGet, game, 'https://raw.githubusercontent.com/getnilinstances/EpavV4/refs/heads/main/miscellaneous/wordlist.txt', true) -- the core
		if not Ok or not Res then return end
		shared.kbbiwords = Res
	end

	for Word in string.gmatch(shared.kbbiwords, '[^\r\n]+') do
		local W = string.lower(Word)
		if string.match(W, '^[a-z]+$') and #W >= 3 and #W <= 15 then
			for Len = 1, math.min(3, #W) do
				local P = string.sub(W, 1, Len)
				Prefix[P] = Prefix[P] or {}
				table.insert(Prefix[P], W)
			end
		end
	end

	Ready = true
end)

local function FindWord(Letter)
	local Pool = Prefix[Letter]
	if not Pool then return end
	local T = {}
	for _, W in ipairs(Pool) do
		if not Used[W] then T[#T+1] = W end
	end
	return #T > 0 and T[math.random(#T)] or nil
end

local function Update(Word, Already)
	for I = #Already + 1, #Word do
		BillboardUpdate:FireServer(string.sub(Word, 1, I))
		task.wait(math.random(8, 18) / 100)
	end
end

local function DoAnswer()
	if not CurrentLetter then return end
	local Words = FindWord(CurrentLetter)
	if not Words then return end

	Used[W] = true
	task.wait(math.random(30, 80) / 100)
	Update(Words, CurrentLetter)
	task.wait(math.random(5, 15) / 100)
	SubmitWord:FireServer(Words)
end

local function Answer()
	if not CurrentLetter or Answered then return end
	Answered = true

	task.spawn(function()
		local T = 0
		while not Ready and T < 15 do
			task.wait(0.5)
			T += 0.5
		end
		if Ready then DoAnswer() end
	end)
end

MatchUI.OnClientEvent:Connect(function(Event, Data)
	if Event == 'UpdateServerLetter' and type(Data) == 'string' then
		CurrentLetter = string.lower(Data)
		Answered = false
	elseif Event == 'StartTurn' then
		Round += 1
		Answered = false
		Answer()
	elseif Event == 'Mistake' then
		Answered = false
		task.wait(0.3)
		Answer()
	elseif Event == 'EndTurn' then
		CurrentLetter = nil
		Answered = false
	end
end)