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

local LocalPlayer = Players.LocalPlayer
local PlayerGui = LocalPlayer:WaitForChild("PlayerGui")
local questionText = workspace.Map.Functional.Screen.SurfaceGui.MainFrame.MainGameContainer.MainTxtContainer.QuestionText
local GameEvent = ReplicatedStorage.Events.GameEvent
local gsub = string.gsub

local lastAnsweredQuestion = ""
local isMinimized = false

local ScreenGui = Instance.new("ScreenGui")
ScreenGui.Name = "NebulaHub"
ScreenGui.ResetOnSpawn = false
ScreenGui.ZIndexBehavior = Enum.ZIndexBehavior.Sibling
ScreenGui.Parent = PlayerGui

local MainFrame = Instance.new("Frame")
MainFrame.Name = "MainFrame"
MainFrame.Size = UDim2.new(0, 300, 0, 150)
MainFrame.Position = UDim2.new(0.5, -150, 0.4, -75)
MainFrame.BackgroundColor3 = Color3.fromRGB(255, 255, 255)
MainFrame.BorderSizePixel = 0
MainFrame.Parent = ScreenGui

local UICorner = Instance.new("UICorner")
UICorner.CornerRadius = UDim.new(0, 12)
UICorner.Parent = MainFrame

local UIGradient = Instance.new("UIGradient")
UIGradient.Color = ColorSequence.new({
    ColorSequenceKeypoint.new(0, Color3.fromRGB(180, 20, 40)),
    ColorSequenceKeypoint.new(0.5, Color3.fromRGB(110, 20, 120)),
    ColorSequenceKeypoint.new(1, Color3.fromRGB(40, 10, 90))
})
UIGradient.Rotation = 45
UIGradient.Parent = MainFrame

local UIStroke = Instance.new("UIStroke")
UIStroke.Thickness = 2
UIStroke.Color = Color3.fromRGB(230, 80, 255)
UIStroke.Transparency = 0.3
UIStroke.Parent = MainFrame

local Title = Instance.new("TextLabel")
Title.Name = "Title"
Title.Size = UDim2.new(1, 0, 0, 40)
Title.Position = UDim2.new(0, 0, 0, 0)
Title.BackgroundTransparency = 1
Title.Text = "🔮 nebula hub" -- Updated to crystal ball emoji!
Title.TextColor3 = Color3.fromRGB(255, 255, 255)
Title.TextSize = 20
Title.Font = Enum.Font.GothamBold
Title.TextXAlignment = Enum.TextXAlignment.Center
Title.Parent = MainFrame

local Divider = Instance.new("Frame")
Divider.Name = "Divider"
Divider.Size = UDim2.new(0.9, 0, 0, 2)
Divider.Position = UDim2.new(0.05, 0, 0, 40)
Divider.BackgroundColor3 = Color3.fromRGB(255, 255, 255)
Divider.BackgroundTransparency = 0.6
Divider.BorderSizePixel = 0
Divider.Parent = MainFrame

local StatusLabel = Instance.new("TextLabel")
StatusLabel.Name = "StatusLabel"
StatusLabel.Size = UDim2.new(0.9, 0, 0, 80)
StatusLabel.Position = UDim2.new(0.05, 0, 0, 50)
StatusLabel.BackgroundTransparency = 1
StatusLabel.Text = "Waiting for a question..."
StatusLabel.TextColor3 = Color3.fromRGB(240, 240, 240)
StatusLabel.TextSize = 15
StatusLabel.Font = Enum.Font.GothamMedium
StatusLabel.TextWrapped = true
StatusLabel.TextXAlignment = Enum.TextXAlignment.Center
StatusLabel.TextYAlignment = Enum.TextYAlignment.Center
StatusLabel.Parent = MainFrame

local MinimizeBtn = Instance.new("TextButton")
MinimizeBtn.Name = "MinimizeBtn"
MinimizeBtn.Size = UDim2.new(0, 24, 0, 24)
MinimizeBtn.Position = UDim2.new(1, -34, 0, 8)
MinimizeBtn.BackgroundTransparency = 1
MinimizeBtn.Text = "—"
MinimizeBtn.TextColor3 = Color3.fromRGB(255, 255, 255)
MinimizeBtn.TextSize = 14
MinimizeBtn.Font = Enum.Font.GothamBold
MinimizeBtn.Parent = MainFrame

local LogoIcon = Instance.new("TextButton")
LogoIcon.Name = "LogoIcon"
LogoIcon.Size = UDim2.new(0, 55, 0, 55)
LogoIcon.Position = UDim2.new(0.05, 0, 0.4, 0)
LogoIcon.BackgroundColor3 = Color3.fromRGB(80, 15, 90)
LogoIcon.Visible = false 
LogoIcon.Text = "🔮"
LogoIcon.TextSize = 28
LogoIcon.Parent = ScreenGui

local LogoCorner = Instance.new("UICorner")
LogoCorner.CornerRadius = UDim.new(1, 0)
LogoCorner.Parent = LogoIcon

local LogoStroke = Instance.new("UIStroke")
LogoStroke.Thickness = 2
LogoStroke.Color = Color3.fromRGB(230, 80, 255)
LogoStroke.Transparency = 0.2
LogoStroke.Parent = LogoIcon

local function toggleGui()
    isMinimized = not isMinimized
    if isMinimized then
        MainFrame.Visible = false
        LogoIcon.Visible = true
    else
        MainFrame.Visible = true
        LogoIcon.Visible = false
    end
end

MinimizeBtn.MouseButton1Click:Connect(toggleGui)
LogoIcon.MouseButton1Click:Connect(toggleGui)

local function setupDrag(guiElement)
    local dragging = false
    local dragInput
    local dragStart
    local startPos

    local function update(input)
        local delta = input.Position - dragStart
        guiElement.Position = UDim2.new(startPos.X.Scale, startPos.X.Offset + delta.X, startPos.Y.Scale, startPos.Y.Offset + delta.Y)
    end

    guiElement.InputBegan:Connect(function(input)
        if input.UserInputType == Enum.UserInputType.MouseButton1 or input.UserInputType == Enum.UserInputType.Touch then
            dragging = true
            dragStart = input.Position
            startPos = guiElement.Position
            
            input.Changed:Connect(function()
                if input.UserInputState == Enum.UserInputState.End then
                    dragging = false
                end
            end)
        end
    end)

    guiElement.InputChanged:Connect(function(input)
        if input.UserInputType == Enum.UserInputType.MouseMovement or input.UserInputType == Enum.UserInputType.Touch then
            dragInput = input
        end
    end)

    UserInputService.InputChanged:Connect(function(input)
        if input == dragInput and dragging then
            update(input)
        end
    end)
end

setupDrag(MainFrame)
setupDrag(LogoIcon)

local function fireUpdateAnswerSequence(answer)
    local answerStr = tostring(answer)
    for i = 1, #answerStr do
        local partialAnswer = string.sub(answerStr, 1, i)
        local args = {
            [1] = "updateAnswer",
            [2] = partialAnswer
        }
        GameEvent:FireServer(unpack(args))
        task.wait(0.1)
    end
end

local function safeEval(str)
    str = gsub(str, "%s+", "")
    local left, op, right = string.match(str, "^([%-%d%.]+)([%+%-%*/])([%-%d%.]+)$")
    
    if left and op and right then
        local num1 = tonumber(left)
        local num2 = tonumber(right)
        
        if op == "+" then return num1 + num2 end
        if op == "-" then return num1 - num2 end
        if op == "*" then return num1 * num2 end
        if op == "/" then return num2 ~= 0 and num1 / num2 or nil end
    end
    return nil
end

questionText:GetPropertyChangedSignal("Text"):Connect(function()
    local expression = questionText.Text
    if expression == "" or expression:find("=.+%d") or expression == lastAnsweredQuestion then 
        return 
    end
    
    local originalQuestion = expression
    local evalExpression = expression
    evalExpression = gsub(evalExpression, "=.*$", "")
    evalExpression = gsub(evalExpression, "x", "*")
    
    StatusLabel.Text = "Solving: " .. evalExpression
    StatusLabel.TextColor3 = Color3.fromRGB(255, 230, 100)
    
    local success, result = pcall(function()
        return safeEval(evalExpression)
    end)
    
    if success and result then
        lastAnsweredQuestion = originalQuestion
        StatusLabel.Text = "✅ Solved!\n" .. evalExpression .. " = " .. tostring(result)
        StatusLabel.TextColor3 = Color3.fromRGB(150, 255, 150)
        fireUpdateAnswerSequence(result)
    else
        StatusLabel.Text = "❌ Failed to parse:\n" .. tostring(evalExpression)
        StatusLabel.TextColor3 = Color3.fromRGB(255, 150, 150)
    end
end)