-- [[ Rscripts Risk Notice ]]
-- This script is not verified by rscripts.net. Deal with caution.
--
-- Stay safe:
--   • Never log in on unofficial Roblox sites or lookalike domains.
--   • Real Roblox links use roblox.com (check the .com ending).
--   • Treat fake Roblox login / "claim reward" pages as phishing.
-- [[ End Rscripts Risk Notice ]]

if _G.__BestMoveGUIRunning then
    warn("[BestMoveGUI] already running")
    return
end
_G.__BestMoveGUIRunning = true

local Players = game:GetService("Players")
local ReplicatedStorage = game:GetService("ReplicatedStorage")
local UserInputService = game:GetService("UserInputService")
local RunService = game:GetService("RunService")

local AUTO_PLAY      = true
_G.__BestMoveAutoPlay = AUTO_PLAY
local TIME_BUDGET    = 2.0
local MAX_DEPTH      = 40
local USE_VORTEX     = true
local HINT_COLOR     = Color3.fromRGB(150, 190, 70)

-- =====  =====
local ChessFolder = ReplicatedStorage:WaitForChild("Chess")
local ClientFolder = ReplicatedStorage:WaitForChild("ChessClient")
local Engine = require(ChessFolder:WaitForChild("Engine"))
local Bot    = require(ChessFolder:WaitForChild("Bot"))
local VortexBot = nil
pcall(function() VortexBot = require(ChessFolder:WaitForChild("VortexBot")) end)
local App    = require(ClientFolder:WaitForChild("App"))

local PROMO_MAP = { q = 5, r = 4, b = 3, n = 2 }
local LocalPlayer = Players.LocalPlayer

local oldGui = LocalPlayer:FindFirstChild("PlayerGui") and LocalPlayer.PlayerGui:FindFirstChild("BestMoveGUI")
if oldGui then oldGui:Destroy() end

local PlayerGui = LocalPlayer:WaitForChild("PlayerGui")
local ScreenGui = Instance.new("ScreenGui")
ScreenGui.Name = "BestMoveGUI"
ScreenGui.ResetOnSpawn = false
ScreenGui.ZIndexBehavior = Enum.ZIndexBehavior.Sibling
ScreenGui.Parent = PlayerGui

local Main = Instance.new("Frame")
Main.Name = "Main"
Main.Size = UDim2.new(0, 300, 0, 300)
Main.Position = UDim2.new(1, -320, 0, 20)
Main.BackgroundColor3 = Color3.fromRGB(24, 26, 32)
Main.BorderSizePixel = 0
Main.Parent = ScreenGui

local corner = Instance.new("UICorner"); corner.CornerRadius = UDim.new(0, 10); corner.Parent = Main
local stroke = Instance.new("UIStroke"); stroke.Color = Color3.fromRGB(60, 64, 72); stroke.Thickness = 1; stroke.Parent = Main

local TitleBar = Instance.new("Frame")
TitleBar.Name = "TitleBar"
TitleBar.Size = UDim2.new(1, 0, 0, 32)
TitleBar.BackgroundColor3 = Color3.fromRGB(32, 34, 42)
TitleBar.BorderSizePixel = 0
TitleBar.Parent = Main
local titleCorner = Instance.new("UICorner"); titleCorner.CornerRadius = UDim.new(0, 10); titleCorner.Parent = TitleBar

local Title = Instance.new("TextLabel")
Title.Size = UDim2.new(1, -40, 1, 0)
Title.Position = UDim2.new(0, 10, 0, 0)
Title.BackgroundTransparency = 1
Title.Text = "♟ Best Move"
Title.TextColor3 = Color3.fromRGB(230, 230, 240)
Title.Font = Enum.Font.GothamBold
Title.TextSize = 15
Title.TextXAlignment = Enum.TextXAlignment.Left
Title.Parent = TitleBar

local MinBtn = Instance.new("TextButton")
MinBtn.Size = UDim2.new(0, 28, 0, 24)
MinBtn.Position = UDim2.new(1, -32, 0, 4)
MinBtn.BackgroundColor3 = Color3.fromRGB(50, 52, 60)
MinBtn.Text = "—"
MinBtn.TextColor3 = Color3.fromRGB(230,230,240)
MinBtn.Font = Enum.Font.GothamBold
MinBtn.TextSize = 14
MinBtn.BorderSizePixel = 0
MinBtn.Parent = TitleBar
local minCorner = Instance.new("UICorner"); minCorner.CornerRadius = UDim.new(0,6); minCorner.Parent = MinBtn

-- 
local Content = Instance.new("Frame")
Content.Name = "Content"
Content.Size = UDim2.new(1, -16, 1, -40)
Content.Position = UDim2.new(0, 8, 0, 36)
Content.BackgroundTransparency = 1
Content.Parent = Main

local layout = Instance.new("UIListLayout")
layout.Padding = UDim.new(0, 6)
layout.SortOrder = Enum.SortOrder.LayoutOrder
layout.Parent = Content

local function makeLabel(text, size, color, bold)
    local l = Instance.new("TextLabel")
    l.Size = UDim2.new(1, 0, 0, size or 18)
    l.BackgroundTransparency = 1
    l.Text = text
    l.TextColor3 = color or Color3.fromRGB(220,220,230)
    l.Font = bold and Enum.Font.GothamBold or Enum.Font.Gotham
    l.TextSize = 13
    l.TextXAlignment = Enum.TextXAlignment.Left
    l.TextWrapped = true
    l.Parent = Content
    return l
end

local function makeRow(labelText)
    local row = Instance.new("Frame")
    row.Name = "Row"
    row.Size = UDim2.new(1, 0, 0, 26)
    row.BackgroundTransparency = 1
    row.Parent = Content
    local lbl = Instance.new("TextLabel")
    lbl.Size = UDim2.new(0.55, 0, 1, 0)
    lbl.BackgroundTransparency = 1
    lbl.Text = labelText
    lbl.TextColor3 = Color3.fromRGB(200,200,210)
    lbl.Font = Enum.Font.Gotham
    lbl.TextSize = 13
    lbl.TextXAlignment = Enum.TextXAlignment.Left
    lbl.Parent = row
    return row, lbl
end

-- 
local rowAP = makeRow("Auto-play:")
local AutoPlayBtn = Instance.new("TextButton")
AutoPlayBtn.Name = "AutoPlayBtn"
AutoPlayBtn.Size = UDim2.new(0.45, -4, 1, -2)
AutoPlayBtn.Position = UDim2.new(0.55, 4, 0, 1)
AutoPlayBtn.BackgroundColor3 = AUTO_PLAY and Color3.fromRGB(60, 130, 80) or Color3.fromRGB(130, 60, 60)
AutoPlayBtn.Text = AUTO_PLAY and "ON" or "OFF"
AutoPlayBtn.TextColor3 = Color3.fromRGB(255,255,255)
AutoPlayBtn.Font = Enum.Font.GothamBold
AutoPlayBtn.TextSize = 12
AutoPlayBtn.BorderSizePixel = 0
AutoPlayBtn.Parent = rowAP
local apc = Instance.new("UICorner"); apc.CornerRadius = UDim.new(0,6); apc.Parent = AutoPlayBtn

-- 
local rowT = makeRow("Time (s):")
local TimeBox = Instance.new("TextBox")
TimeBox.Size = UDim2.new(0.45, -4, 1, -2)
TimeBox.Position = UDim2.new(0.55, 4, 0, 1)
TimeBox.BackgroundColor3 = Color3.fromRGB(40, 42, 50)
TimeBox.Text = tostring(TIME_BUDGET)
TimeBox.TextColor3 = Color3.fromRGB(230,230,240)
TimeBox.Font = Enum.Font.Gotham
TimeBox.TextSize = 12
TimeBox.BorderSizePixel = 0
TimeBox.Parent = rowT
local tc = Instance.new("UICorner"); tc.CornerRadius = UDim.new(0,6); tc.Parent = TimeBox

-- 
local rowD = makeRow("Depth:")
local DepthBox = Instance.new("TextBox")
DepthBox.Size = UDim2.new(0.45, -4, 1, -2)
DepthBox.Position = UDim2.new(0.55, 4, 0, 1)
DepthBox.BackgroundColor3 = Color3.fromRGB(40, 42, 50)
DepthBox.Text = tostring(MAX_DEPTH)
DepthBox.TextColor3 = Color3.fromRGB(230,230,240)
DepthBox.Font = Enum.Font.Gotham
DepthBox.TextSize = 12
DepthBox.BorderSizePixel = 0
DepthBox.Parent = rowD
local dc = Instance.new("UICorner"); dc.CornerRadius = UDim.new(0,6); dc.Parent = DepthBox

--
local StatusBest = makeLabel("Best: --", 18, Color3.fromRGB(150, 220, 150), true)
local StatusScore = makeLabel("Score: --", 16)
local StatusDepth = makeLabel("Depth: --", 16)
local StatusTurn = makeLabel("Turn: --", 16, Color3.fromRGB(200, 200, 120))
local StatusColor = makeLabel("You: --", 16, Color3.fromRGB(180, 180, 220))

-- 
local AnalyzeBtn = Instance.new("TextButton")
AnalyzeBtn.Name = "AnalyzeBtn"
AnalyzeBtn.Size = UDim2.new(1, 0, 0, 28)
AnalyzeBtn.BackgroundColor3 = Color3.fromRGB(70, 110, 170)
AnalyzeBtn.Text = "Analyze now"
AnalyzeBtn.TextColor3 = Color3.fromRGB(255,255,255)
AnalyzeBtn.Font = Enum.Font.GothamBold
AnalyzeBtn.TextSize = 13
AnalyzeBtn.BorderSizePixel = 0
AnalyzeBtn.Parent = Content
local abc = Instance.new("UICorner"); abc.CornerRadius = UDim.new(0,6); abc.Parent = AnalyzeBtn

--
local ClearBtn = Instance.new("TextButton")
ClearBtn.Size = UDim2.new(1, 0, 0, 24)
ClearBtn.BackgroundColor3 = Color3.fromRGB(90, 50, 50)
ClearBtn.Text = "Clear arrow"
ClearBtn.TextColor3 = Color3.fromRGB(255,255,255)
ClearBtn.Font = Enum.Font.Gotham
ClearBtn.TextSize = 12
ClearBtn.BorderSizePixel = 0
ClearBtn.Parent = Content
local cbc = Instance.new("UICorner"); cbc.CornerRadius = UDim.new(0,6); cbc.Parent = ClearBtn

--
local dragging = false
local dragStart, startPos
TitleBar.InputBegan:Connect(function(input)
    if input.UserInputType == Enum.UserInputType.MouseButton1 or input.UserInputType == Enum.UserInputType.Touch then
        dragging = true
        dragStart = input.Position
        startPos = Main.Position
    end
end)
UserInputService.InputChanged:Connect(function(input)
    if dragging and (input.UserInputType == Enum.UserInputType.MouseMovement or input.UserInputType == Enum.UserInputType.Touch) then
        local delta = input.Position - dragStart
        Main.Position = UDim2.new(startPos.X.Scale, startPos.X.Offset + delta.X, startPos.Y.Scale, startPos.Y.Offset + delta.Y)
    end
end)
UserInputService.InputEnded:Connect(function(input)
    if input.UserInputType == Enum.UserInputType.MouseButton1 or input.UserInputType == Enum.UserInputType.Touch then
        dragging = false
    end
end)

--
local PROMO_MAP2 = { q = 5, r = 4, b = 3, n = 2 }
local busy = false
local forceAnalyze = false

local function clearArrow()
    pcall(function()
        if App.board then App.board:setArrow("hint", nil) end
    end)
end

local function drawArrow(uci)
    if not (uci and #uci >= 4) then return end
    local from = Engine.algToIndex64(string.sub(uci, 1, 2))
    local to   = Engine.algToIndex64(string.sub(uci, 3, 4))
    if not from or not to then return end
    pcall(function()
        App.board:setArrow("hint", from, to, HINT_COLOR, 0.15)
    end)
end

local function playMove(uci)
    if _G.__BestMoveAutoPlay ~= true then return end
    if not (uci and #uci >= 4) then return end
    local from = Engine.algToIndex64(string.sub(uci, 1, 2))
    local to   = Engine.algToIndex64(string.sub(uci, 3, 4))
    local promoChar = string.sub(uci, 5, 5)
    local promo = PROMO_MAP2[promoChar] or 0
    if not from or not to then return end
    local ok, err = pcall(function()
        App.onBoardMove(from, to, promo, false)
    end)
    if not ok then
        warn("[BestMove] onBoardMove failed: " .. tostring(err))
    end
end

local function shouldAct(session, force)
    if not session then return false end
    if session.over then return false end
    if session.kind == "idle" or session.kind == "analysis" then return false end
    if session.viewPly ~= #session.ucis then return false end
    if force then return true end
    local ok, myTurn = pcall(function() return session:isMyTurn() end)
    if not ok or not myTurn then return false end
    return true
end

local function readSettings()
    local t = tonumber(TimeBox.Text)
    if t and t > 0 then TIME_BUDGET = t end
    local d = tonumber(DepthBox.Text)
    if d and d > 0 then MAX_DEPTH = math.floor(d) end
end

local function getBestMove(session)
    -- 
    local okBook, book = pcall(function() return Bot.bookMove(session.ucis) end)
    if okBook and type(book) == "string" and #book >= 4 then
        return book, nil, "book"
    end
    -- 
    if USE_VORTEX and VortexBot then
        local okV, resV = pcall(function()
            return VortexBot.reviewGame(session.startFen, session.ucis)
        end)
        if okV and type(resV) == "table" and type(resV.best) == "string" and #resV.best >= 4 then
            return resV.best, resV.score, resV.depth or "Vortex"
        end
    end
    -- 
    local r = Bot.analyse(session.startFen, table.clone(session.ucis), TIME_BUDGET, MAX_DEPTH)
    if type(r) == "table" and type(r.best) == "string" then
        return r.best, r.score, r.depth
    end
    return nil
end

local function runAnalysis(force)
    if busy then return end
    local session = App.session
    if not shouldAct(session, force) then
        StatusTurn.Text = "Turn: not your turn / idle"
        return
    end
    busy = true
    StatusTurn.Text = "Turn: thinking..."
    task.spawn(function()
        local captured = session
        local capturedCount = #session.ucis
        local resultBest
        local resultScore
        local resultDepth
        local ok, err = pcall(function()
            local b, s, d = getBestMove(captured)
            resultBest, resultScore, resultDepth = b, s, d
        end)
        busy = false
        readSettings()

        if not ok or not resultBest then
            if not ok then warn("[BestMove] analyse error: " .. tostring(err)) end
            StatusTurn.Text = "Turn: error"
            return
        end
        if App.session ~= captured then return end
        if #App.session.ucis ~= capturedCount then return end

        StatusBest.Text = "Best: " .. resultBest
        StatusScore.Text = "Score: " .. tostring(resultScore)
        StatusDepth.Text = "Depth: " .. tostring(resultDepth)
        StatusTurn.Text = "Turn: " .. (captured:isMyTurn() and "your turn" or "opponent")
        StatusColor.Text = "You: " .. (captured.myColor == 1 and "White" or "Black") .. " | To move: " .. (captured.engine.side == 1 and "White" or "Black")

        drawArrow(resultBest)

        if _G.__BestMoveAutoPlay == true and captured:isMyTurn() then
            playMove(resultBest)
        end
    end)
end

-- 
AutoPlayBtn.MouseButton1Click:Connect(function()
    AUTO_PLAY = not AUTO_PLAY
    _G.__BestMoveAutoPlay = AUTO_PLAY
    AutoPlayBtn.Text = AUTO_PLAY and "ON" or "OFF"
    AutoPlayBtn.BackgroundColor3 = AUTO_PLAY and Color3.fromRGB(60,130,80) or Color3.fromRGB(130,60,60)
    print("[BestMove] AutoPlay = " .. tostring(AUTO_PLAY))
end)

AnalyzeBtn.MouseButton1Click:Connect(function()
    forceAnalyze = true
    runAnalysis(true)
end)

ClearBtn.MouseButton1Click:Connect(function()
    clearArrow()
end)

local minimized = false
MinBtn.MouseButton1Click:Connect(function()
    minimized = not minimized
    Content.Visible = not minimized
    Main.Size = minimized and UDim2.new(0, 300, 0, 32) or UDim2.new(0, 300, 0, 300)
    MinBtn.Text = minimized and "+" or "—"
end)

TimeBox.FocusLost:Connect(function()
    readSettings()
end)
DepthBox.FocusLost:Connect(function()
    readSettings()
end)

-- 
task.spawn(function()
    while true do
        task.wait(0.25)
        local session = App.session
        if session and not session.over then
            StatusTurn.Text = "Turn: " .. (session:isMyTurn() and "your turn" or "opponent") .. "  (" .. session.kind .. ")"
            StatusColor.Text = "You: " .. (session.myColor == 1 and "White" or "Black") .. " | To move: " .. (session.engine.side == 1 and "White" or "Black")
        else
            StatusTurn.Text = "Turn: idle / game over"
            StatusColor.Text = "You: --"
        end

        if forceAnalyze then
            forceAnalyze = false
        end

        if _G.__BestMoveAutoPlay == true and session and not session.over and session.viewPly == #session.ucis and session:isMyTurn() and not busy then
            runAnalysis(false)
        end
    end
end)