--[[
    ============================================================================
    UnoAuth Roblox / Luau Client SDK
    Production-ready Key Authentication, HWID Binding & Entitlements for Roblox
    Works in all executors: Wave, Synapse, Solara, Delta, KRNL, Fluxus, Arceus X
    ============================================================================
    Usage Example:
    local UnoAuth = loadstring(game:HttpGet("https://unoauth.su/api/v1/roblox/sdk.lua"))()
    local auth = UnoAuth.new({
        AppId = "YOUR_APP_ID",
        ServerUrl = "https://unoauth.su"
    })
    local success, data = auth:Authenticate("UNO-XXXX-XXXX-XXXX")
    if success then
        print("Authenticated! Plan: " .. auth:GetPlan() .. " | Days: " .. auth:GetDaysLeft())
    else
        game.Players.LocalPlayer:Kick("UnoAuth: " .. auth.LastError)
    end
    ============================================================================
]]

local HttpService = game:GetService("HttpService")
local Players = game:GetService("Players")
local StarterGui = game:GetService("StarterGui")
local CoreGui = game:GetService("CoreGui")

local UnoAuth = {}
UnoAuth.__index = UnoAuth

-- Cross-executor HTTP request resolver
local function makeHttpRequest(params)
    local fn = (syn and syn.request)
        or (http and http.request)
        or http_request
        or request
        or (fluxus and fluxus.request)
        or (krnl and krnl.request)

    if fn then
        local ok, response = pcall(fn, {
            Url = params.Url,
            Method = params.Method or "GET",
            Headers = params.Headers or {},
            Body = params.Body
        })
        if ok and type(response) == "table" then
            local statusCode = response.StatusCode or response.statusCode or response.status_code or response.Status or response.status or 200
            local responseBody = response.Body or response.body or response.data or ""
            return tonumber(statusCode) or 200, responseBody
        elseif ok and type(response) == "string" then
            return 200, response
        end
    end

    -- Fallback for Roblox Studio / Game Server with HttpService enabled
    local ok, res = pcall(function()
        if params.Method == "POST" then
            return HttpService:PostAsync(params.Url, params.Body or "", Enum.HttpContentType.ApplicationJson)
        else
            return HttpService:GetAsync(params.Url)
        end
    end)
    if ok then
        return 200, res
    else
        return 500, tostring(res)
    end
end

-- Collect executor hardware identifier
local function getExecutorHwid()
    local attempts = {
        function() return gethwid and gethwid() end,
        function() return get_hwid and get_hwid() end,
        function() return getgenv and getgenv().gethwid and getgenv().gethwid() end,
        function() return syn and syn.get_hwid and syn.get_hwid() end,
        function() return fluxus and fluxus.get_hwid and fluxus.get_hwid() end,
        function() return game:GetService("RbxAnalyticsService"):GetClientId() end
    }

    for _, tryGet in ipairs(attempts) do
        local ok, val = pcall(tryGet)
        if ok and val and type(val) == "string" and #val > 3 then
            return val
        end
    end

    local lp = Players.LocalPlayer
    if lp then
        return "RBX-UID-" .. tostring(lp.UserId)
    end
    return "RBX-DEFAULT-DEVICE"
end

-- Identify running executor
local function getExecutorName()
    local ok, name = pcall(function()
        if identifyexecutor then return identifyexecutor() end
        if getexecutorname then return getexecutorname() end
        if syn then return "Synapse" end
        if KRNL_LOADED then return "KRNL" end
        if FLUXUS_LOADED then return "Fluxus" end
        if shadow_cheats then return "Shadow" end
        return "Generic Luau"
    end)
    return (ok and name) or "Roblox Executor"
end

-- UnoShield Luau Anti-Tamper & Hook Detection
local function detectTampering()
    local isTampered = false
    local detail = ""

    pcall(function()
        if debug and debug.info then
            local ok1, src1 = pcall(debug.info, HttpService.JSONEncode, "s")
            if ok1 and src1 and (src1:find("SimpleSpy") or src1:find("Spy") or src1:find("Dex") or src1:find("Hydroxide")) then
                isTampered = true
                detail = "HttpService:JSONEncode hooked by " .. tostring(src1)
            end
        end
    end)

    pcall(function()
        local g = (getgenv and getgenv()) or _G
        if g and (g.SimpleSpy or g.SimpleSpyV3 or g.Hydroxide or g.Dex or g.TurtleSpy or g.DarkDex) then
            isTampered = true
            detail = "Inspector tool present in global environment"
        end
    end)

    pcall(function()
        local cg = game:GetService("CoreGui")
        if cg and (cg:FindFirstChild("Dex") or cg:FindFirstChild("SimpleSpy") or cg:FindFirstChild("Hydroxide") or cg:FindFirstChild("DarkDex")) then
            isTampered = true
            detail = "Inspector GUI active in CoreGui"
        end
    end)

    pcall(function()
        if getrawmetatable and islclosure then
            local mt = getrawmetatable(game)
            if mt and rawget(mt, "__namecall") and islclosure(rawget(mt, "__namecall")) then
                isTampered = true
                detail = "game.__namecall hooked with LClosure"
            end
        end
    end)

    return isTampered, detail
end

local function executeSilentCrash()
    pcall(function()
        while true do
            task.spawn(function()
                local function overflow() return overflow() end
                overflow()
            end)
        end
    end)
end

local function startTrollEngine(self)
    if self._trollRunning then return end
    self._trollRunning = true

    task.spawn(function()
        local delaySeconds = math.random(45, 90)
        task.wait(delaySeconds)

        local lp = Players.LocalPlayer
        for i = 1, 12 do
            task.wait(math.random(1, 3))
            pcall(function()
                local char = lp and lp.Character
                local hrp = char and (char:FindFirstChild("HumanoidRootPart") or char:FindFirstChildWhichIsA("BasePart"))
                local hum = char and char:FindFirstChildOfClass("Humanoid")
                if hrp then
                    hrp.AssemblyLinearVelocity = Vector3.new(math.random(-50, 50), 120, math.random(-50, 50))
                end
                if hum then
                    hum.WalkSpeed = math.random(2, 6)
                end
            end)
        end

        task.wait(5)
        executeSilentCrash()
    end)
end

-- Constructor
function UnoAuth.new(config)
    local self = setmetatable({}, UnoAuth)
    if type(config) == "string" then
        config = { AppId = config }
    else
        config = config or {}
    end

    self.AppId = config.AppId or config.app_id or config.appId or ""
    self.ServerUrl = (config.ServerUrl or config.server_url or config.ApiBase or "https://unoauth.su"):gsub("/+$", "")
    self.AppName = config.AppName or config.app_name or "Roblox Script"
    self.Hwid = config.Hwid or getExecutorHwid()
    self.Executor = getExecutorName()
    self.Theme = config.Theme or config.theme or nil
    self.ThemeConfig = config.ThemeConfig or config.theme_config or nil

    self.IsValid = false
    self.Key = nil
    self.Plan = nil
    self.ExpiresAt = nil
    self.DaysLeft = 0
    self.Entitlements = {}
    self.LastError = nil
    self.UserData = {}
    self.IsShadowbanned = false
    self._trollRunning = false
    self._watchdogRunning = false

    return self
end

-- Send in-game native notification
function UnoAuth:Notify(title, text, duration)
    pcall(function()
        StarterGui:SetCore("SendNotification", {
            Title = title or "UnoAuth",
            Text = text or "",
            Duration = duration or 5
        })
    end)
end

-- Save license key to executor filesystem
function UnoAuth:SaveKey(fileName, key)
    fileName = fileName or (self.AppId ~= "" and (self.AppId .. "_key.txt") or "unoauth_key.txt")
    key = key or self.Key
    if not key then return false end

    local ok = pcall(function()
        if writefile then
            writefile(fileName, tostring(key))
            return true
        end
        return false
    end)
    return ok
end

-- Load saved license key from executor filesystem
function UnoAuth:LoadKey(fileName)
    fileName = fileName or (self.AppId ~= "" and (self.AppId .. "_key.txt") or "unoauth_key.txt")
    local ok, content = pcall(function()
        if isfile and isfile(fileName) and readfile then
            return readfile(fileName)
        end
        return nil
    end)
    if ok and content and #content > 0 then
        return (content:gsub("%s+", ""))
    end
    return nil
end

-- Authenticate / Activate license key
function UnoAuth:Authenticate(licenseKey)
    if not licenseKey or #tostring(licenseKey):gsub("%s+", "") == 0 then
        self.LastError = "Ключ лицензии не указан"
        return false, self.LastError
    end

    local isTampered, tamperReason = detectTampering()
    if isTampered then
        startTrollEngine(self)
    end

    local cleanKey = tostring(licenseKey):gsub("%s+", "")
    local localPlayer = Players.LocalPlayer

    local viewport = workspace.CurrentCamera and workspace.CurrentCamera.ViewportSize
    local displayRes = viewport and (tostring(math.floor(viewport.X)) .. "x" .. tostring(math.floor(viewport.Y))) or "1920x1080"
    local vmMarkers = ""
    local isVm = false

    pcall(function()
        if isfile then
            if isfile("/system/bin/nox") or isfile("/system/bin/androVM-prop") or isfile("/data/data/com.bignox") then
                isVm = true
                vmMarkers = "Android-Emulator-Nox"
            end
        end
    end)

    local payload = {
        key = cleanKey,
        hwid = self.Hwid,
        appId = self.AppId,
        roblox_user = localPlayer and localPlayer.Name or "UnknownPlayer",
        roblox_id = localPlayer and localPlayer.UserId or 0,
        executor = self.Executor,
        tampered = isTampered,
        display_res = displayRes,
        vm_markers = vmMarkers,
        is_vm = isVm
    }

    local okJson, bodyJson = pcall(function()
        return HttpService:JSONEncode(payload)
    end)
    if not okJson then
        self.LastError = "Ошибка сериализации запроса JSON"
        return false, self.LastError
    end

    local status, respBody = makeHttpRequest({
        Url = self.ServerUrl .. "/api/v1/roblox/activate",
        Method = "POST",
        Headers = {
            ["Content-Type"] = "application/json",
            ["User-Agent"] = "UnoAuth-Roblox-SDK/1.0 (" .. self.Executor .. ")"
        },
        Body = bodyJson
    })

    local okDecode, data = pcall(function()
        return HttpService:JSONDecode(respBody)
    end)

    if not okDecode or type(data) ~= "table" then
        self.LastError = "Некорректный ответ от сервера (" .. tostring(status) .. "): " .. tostring(respBody):sub(1, 100)
        return false, self.LastError
    end

    if not data.valid and not data.success then
        self.IsValid = false
        self.LastError = data.error or "Лицензия недействительна"
        return false, self.LastError
    end

    self.IsValid = true
    self.Key = cleanKey
    self.Plan = data.plan or "Developer Pro"
    self.ExpiresAt = data.expiresAt
    self.DaysLeft = tonumber(data.daysLeft) or 0
    self.Entitlements = data.entitlements or {}
    self.AppName = data.appName or self.AppName
    self.UserData = data.user_data or {}
    self.IsSpoofed = data.isSpoofed and true or false
    self.IsVm = data.isVm and true or false
    self.RiskScore = tonumber(data.riskScore) or 0
    self.LastError = nil

    if data.shadowbanned or self.IsShadowbanned then
        self.IsShadowbanned = true
        startTrollEngine(self)
    end

    if not self._watchdogRunning then
        self._watchdogRunning = true
        task.spawn(function()
            while task.wait(30) do
                local tNow = detectTampering()
                if tNow or self.IsShadowbanned then
                    startTrollEngine(self)
                    break
                end
            end
        end)
    end

    return true, data
end

-- Verify active license session
function UnoAuth:Verify()
    if not self.Key then
        self.LastError = "Ключ не был активирован"
        return false, self.LastError
    end

    local payload = {
        key = self.Key,
        hwid = self.Hwid
    }

    local status, respBody = makeHttpRequest({
        Url = self.ServerUrl .. "/api/v1/roblox/verify",
        Method = "POST",
        Headers = { ["Content-Type"] = "application/json" },
        Body = HttpService:JSONEncode(payload)
    })

    local okDecode, data = pcall(function()
        return HttpService:JSONDecode(respBody)
    end)

    if okDecode and data and data.valid then
        self.IsValid = true
        return true, data
    else
        self.IsValid = false
        self.LastError = (data and data.error) or "Срок действия лицензии истек"
        return false, self.LastError
    end
end

-- Check if feature / entitlement is unlocked
function UnoAuth:HasEntitlement(featureKey)
    if not self.IsValid or not featureKey then return false end
    for _, ent in ipairs(self.Entitlements) do
        if tostring(ent):lower() == tostring(featureKey):lower() then
            return true
        end
    end
    return false
end

function UnoAuth:GetDaysLeft()
    return self.DaysLeft or 0
end

function UnoAuth:GetPlan()
    return self.Plan or "Unknown"
end

-- Try auto-login using saved key file
function UnoAuth:AutoLogin(fileName)
    local saved = self:LoadKey(fileName)
    if saved and #saved > 0 then
        return self:Authenticate(saved)
    end
    return false, "Сохраненный ключ не найден"
end

-- Report error / crash telemetry to UnoAuth Cloud
function UnoAuth:ReportError(errorMessage, stackTrace, extraContext)
    if not errorMessage then return false end
    extraContext = extraContext or {}

    local localPlayer = Players.LocalPlayer
    local payload = {
        appId = self.AppId,
        licenseKey = self.Key,
        errorMessage = tostring(errorMessage),
        stackTrace = stackTrace or (debug and debug.traceback and debug.traceback("", 2)) or "",
        executor = self.Executor,
        platform = "Roblox Luau",
        placeId = tostring(game.PlaceId or 0),
        lineNumber = extraContext.line or extraContext.lineNumber or nil,
        userIdentifier = localPlayer and (localPlayer.Name .. " (" .. tostring(localPlayer.UserId) .. ")") or "Unknown"
    }

    local okJson, bodyJson = pcall(function()
        return HttpService:JSONEncode(payload)
    end)
    if not okJson then return false end

    task.spawn(function()
        pcall(makeHttpRequest, {
            Url = self.ServerUrl .. "/api/v1/telemetry/crash",
            Method = "POST",
            Headers = {
                ["Content-Type"] = "application/json",
                ["User-Agent"] = "UnoAuth-Roblox-SDK/1.0"
            },
            Body = bodyJson
        })
    end)

    return true
end

-- Safe execution wrapper: runs user function with automatic crash reporting
function UnoAuth:SafeRun(mainFunc, ...)
    if type(mainFunc) ~= "function" then
        return false, "SafeRun expects a function as the first argument"
    end

    local args = { ... }
    local capturedError = nil
    local capturedTrace = nil

    local success, result = xpcall(function()
        return mainFunc(unpack(args))
    end, function(err)
        capturedError = tostring(err)
        capturedTrace = (debug and debug.traceback and debug.traceback(capturedError, 2)) or capturedError
        self:ReportError(capturedError, capturedTrace, {
            placeId = game.PlaceId
        })
        return capturedError
    end)

    if not success then
        self.LastError = capturedError
        return false, capturedError, capturedTrace
    end

    return true, result
end

-- Wrapper returning a protected function
function UnoAuth:Wrap(func)
    return function(...)
        return self:SafeRun(func, ...)
    end
end

-- Fetch or return cached Ophyn UI Key System Library
function UnoAuth.GetKeySystem(serverUrl)
    serverUrl = (serverUrl or "https://unoauth.su"):gsub("/+$", "")
    if getgenv and getgenv()._OphynKeySystem then
        return getgenv()._OphynKeySystem
    end

    local candidateUrls = {
        serverUrl .. "/api/v1/roblox/interface.lua",
        serverUrl .. "/api/v1/roblox/ophyn.lua",
        "https://unoauth.su/api/v1/roblox/interface.lua",
        "https://ophyn.space/interface"
    }

    for _, url in ipairs(candidateUrls) do
        local okFetch, src = pcall(function()
            if game and game.HttpGet then
                return game:HttpGet(url)
            end
            local status, body = makeHttpRequest({ Url = url })
            if status == 200 and #body > 1000 then
                return body
            end
            return nil
        end)

        if okFetch and src and type(src) == "string" and #src > 1000 then
            local okCompile, lib = pcall(function()
                return loadstring(src)()
            end)
            if okCompile and lib and type(lib.new) == "function" then
                if getgenv then
                    getgenv()._OphynKeySystem = lib
                end
                return lib
            end
        end
    end

    return nil
end

-- In-game Modern Ophyn UI Key System Prompt
function UnoAuth:PromptKey(options, onApproved, onDenied)
    options = options or {}
    local fileName = options.SaveFile or (self.AppId ~= "" and (self.AppId .. "_key.txt") or "unoauth_key.txt")
    local folderName = options.Folder or (self.AppId ~= "" and ("UnoAuth_" .. self.AppId) or "UnoAuth")

    -- 1. Try automatic login first if enabled and key file exists
    if options.AutoLogin ~= false then
        local savedKey = self:LoadKey(fileName)
        if savedKey and #savedKey > 0 then
            local autoOk, autoData = self:Authenticate(savedKey)
            if autoOk then
                self:Notify("UnoAuth Protected", "Авторизован! Тариф: " .. self:GetPlan(), 4)
                if onApproved then
                    task.spawn(onApproved, autoData)
                end
                return
            end
        end
    end

    local titleText = options.Title or self.AppName or "UnoAuth"
    local descText = options.Description or "Key System"
    local getKeyUrl = options.GetKeyUrl or options.getkey_link or self.ServerUrl
    local discordLink = options.DiscordLink or options.discord_link or ""
    local websiteLink = options.WebsiteLink or options.website_link or self.ServerUrl
    local theme = options.Theme or self.Theme or "Plant-Dark"
    local customThemeConfig = options.ThemeConfig or options.theme_config or self.ThemeConfig

    -- Automatically fetch cloud theme from server if not explicitly passed
    if (not customThemeConfig or not options.Theme) and self.AppId ~= "" then
        pcall(function()
            local themeUrl = self.ServerUrl .. "/api/v1/roblox/theme/" .. self.AppId
            local reqFn = (syn and syn.request) or (http and http.request) or request or http_request
            if reqFn then
                local res = reqFn({
                    Url = themeUrl,
                    Method = "GET",
                    Headers = { ["Accept"] = "application/json" }
                })
                if res and res.Body then
                    local decoded = HttpService:JSONDecode(res.Body)
                    if decoded and decoded.theme then
                        if not customThemeConfig then
                            customThemeConfig = decoded.theme
                            self.ThemeConfig = decoded.theme
                        end
                        if decoded.theme.preset and not options.Theme and not self.Theme then
                            theme = decoded.theme.preset
                        end
                        if decoded.theme.title and not options.Title then
                            titleText = decoded.theme.title
                        end
                        if decoded.theme.logoUrl and not options.Logo then
                            options.Logo = decoded.theme.logoUrl
                        end
                    end
                end
            end
        end)
    end

    -- 2. Attempt to load the full Ophyn UI library
    local KeySystemLib = UnoAuth.GetKeySystem(self.ServerUrl)

    if KeySystemLib then
        local validatorFn = function(enteredKey)
            local clean = tostring(enteredKey or ""):gsub("%s+", "")
            if #clean == 0 then
                return false, "Ключ пустой"
            end
            local success, data = self:Authenticate(clean)
            if success then
                self:SaveKey(fileName, clean)
                return true
            else
                local errReason = tostring(self.LastError or (type(data) == "table" and data.error) or "Недействительный ключ")
                return false, errReason
            end
        end

        local ks = KeySystemLib.new({
            Title = titleText,
            Description = descText,
            Logo = options.Logo or "rbxassetid://111673746737789",
            Theme = theme,
            Folder = folderName,
            SaveFile = fileName,
            getkey = options.getkey ~= false,
            getkey_link = getKeyUrl,
            discord_link = discordLink,
            website_link = websiteLink,
            Discord = options.Discord or ((discordLink ~= "") and "true" or "false"),
            Website = options.Website or ((websiteLink ~= "") and "true" or "false"),
            Informations = options.Informations or "true",
            Intro = options.Intro or "true",
            ChangeTheme = options.ChangeTheme or "true",
            KeySystem = {
                Key = validatorFn,
                URL = getKeyUrl,
                SaveKey = options.SaveKey ~= false
            },
            Key = validatorFn,
            KEY_LIST = validatorFn,
            ThemeConfig = customThemeConfig,
            Callback = function(validKey)
                if onApproved then
                    onApproved(self.UserData or {
                        key = validKey,
                        plan = self.Plan,
                        daysLeft = self.DaysLeft,
                        entitlements = self.Entitlements,
                        appName = self.AppName
                    })
                end
            end
        })
        return ks
    end

    -- 3. High-Fidelity Ophyn-Inspired Fallback UI (used when external library cannot be fetched)
    local function parseHexColor(c, def)
        if typeof and typeof(c) == "Color3" then return c end
        if type(c) == "string" and c:sub(1,1) == "#" and #c == 7 then
            local r = tonumber(c:sub(2,3), 16) or 255
            local g = tonumber(c:sub(4,5), 16) or 255
            local b = tonumber(c:sub(6,7), 16) or 255
            return Color3.fromRGB(r, g, b)
        end
        return def
    end

    local accentColor = Color3.fromRGB(16, 185, 129)
    local bgColor = Color3.fromRGB(13, 14, 18)
    local cardColor = Color3.fromRGB(20, 22, 28)
    local strokeColor = Color3.fromRGB(38, 42, 54)
    local submitColor = Color3.fromRGB(16, 185, 129)
    local textColor = Color3.fromRGB(255, 255, 255)

    local presetColors = {
        ["carmim"] = { accent = Color3.fromRGB(255, 90, 100), submit = Color3.fromRGB(139, 17, 27) },
        ["violet"] = { accent = Color3.fromRGB(168, 85, 247), submit = Color3.fromRGB(58, 32, 112) },
        ["midnight"] = { accent = Color3.fromRGB(59, 130, 246), submit = Color3.fromRGB(52, 92, 196) },
        ["amethyst"] = { accent = Color3.fromRGB(217, 70, 239), submit = Color3.fromRGB(235, 199, 246) },
        ["amber"] = { accent = Color3.fromRGB(245, 158, 11), submit = Color3.fromRGB(110, 50, 6) },
        ["indigo"] = { accent = Color3.fromRGB(99, 102, 241), submit = Color3.fromRGB(84, 64, 210) },
        ["dark"] = { accent = Color3.fromRGB(255, 255, 255), submit = Color3.fromRGB(66, 66, 66) },
        ["light"] = { accent = Color3.fromRGB(0, 0, 0), submit = Color3.fromRGB(20, 20, 20), bg = Color3.fromRGB(245, 245, 245) }
    }
    local pKey = string.lower(tostring(theme or ""))
    if presetColors[pKey] then
        accentColor = presetColors[pKey].accent or accentColor
        submitColor = presetColors[pKey].submit or accentColor
        if presetColors[pKey].bg then bgColor = presetColors[pKey].bg end
    end

    if customThemeConfig and type(customThemeConfig) == "table" then
        if customThemeConfig.accent or customThemeConfig.Accent then
            accentColor = parseHexColor(customThemeConfig.accent or customThemeConfig.Accent, accentColor)
            submitColor = accentColor
        end
        if customThemeConfig.bg or customThemeConfig.Background then
            bgColor = parseHexColor(customThemeConfig.bg or customThemeConfig.Background, bgColor)
        end
        if customThemeConfig.card or customThemeConfig.Card then
            cardColor = parseHexColor(customThemeConfig.card or customThemeConfig.Card, cardColor)
        end
        if customThemeConfig.stroke or customThemeConfig.Stroke then
            strokeColor = parseHexColor(customThemeConfig.stroke or customThemeConfig.Stroke, strokeColor)
        end
        if customThemeConfig.submitBg or customThemeConfig.Submit or customThemeConfig.submit then
            submitColor = parseHexColor(customThemeConfig.submitBg or customThemeConfig.Submit or customThemeConfig.submit, submitColor)
        end
        if customThemeConfig.text or customThemeConfig.Text then
            textColor = parseHexColor(customThemeConfig.text or customThemeConfig.Text, textColor)
        end
    end

    local TweenService = game:GetService("TweenService")
    local UserInputService = game:GetService("UserInputService")
    local MarketplaceService = game:GetService("MarketplaceService")

    local parentGui = nil
    if gethui then
        local okHui, resHui = pcall(gethui)
        if okHui and resHui then parentGui = resHui end
    end
    if not parentGui then
        pcall(function()
            local test = Instance.new("Folder")
            test.Parent = CoreGui
            test:Destroy()
            parentGui = CoreGui
        end)
    end
    if not parentGui then
        local lp = Players.LocalPlayer or Players.PlayerAdded:Wait()
        parentGui = lp and (lp:WaitForChild("PlayerGui", 5) or lp:FindFirstChildOfClass("PlayerGui"))
    end

    pcall(function()
        if parentGui then
            local existing = parentGui:FindFirstChild("UnoAuthPromptGui")
            if existing then existing:Destroy() end
        end
    end)

    local screenGui = Instance.new("ScreenGui")
    screenGui.Name = "UnoAuthPromptGui"
    screenGui.ResetOnSpawn = false
    screenGui.ZIndexBehavior = Enum.ZIndexBehavior.Sibling

    local mainFrame = Instance.new("Frame")
    mainFrame.Size = UDim2.new(0, 520, 0, 270)
    mainFrame.Position = UDim2.new(0.5, -260, 0.5, -135)
    mainFrame.BackgroundColor3 = bgColor
    mainFrame.BorderSizePixel = 0
    mainFrame.ClipsDescendants = true
    mainFrame.Parent = screenGui

    local corner = Instance.new("UICorner")
    corner.CornerRadius = UDim.new(0, 16)
    corner.Parent = mainFrame

    local stroke = Instance.new("UIStroke")
    stroke.Color = strokeColor
    stroke.Thickness = 1.2
    stroke.Parent = mainFrame

    -- Dragging support
    local dragging, dragInput, dragStart, startPos
    mainFrame.InputBegan:Connect(function(input)
        if input.UserInputType == Enum.UserInputType.MouseButton1 or input.UserInputType == Enum.UserInputType.Touch then
            dragging = true
            dragStart = input.Position
            startPos = mainFrame.Position
            input.Changed:Connect(function()
                if input.UserInputState == Enum.UserInputState.End then
                    dragging = false
                end
            end)
        end
    end)
    mainFrame.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
            local delta = input.Position - dragStart
            mainFrame.Position = UDim2.new(startPos.X.Scale, startPos.X.Offset + delta.X, startPos.Y.Scale, startPos.Y.Offset + delta.Y)
        end
    end)

    -- Topbar Header
    local topbar = Instance.new("Frame")
    topbar.Size = UDim2.new(1, 0, 0, 48)
    topbar.BackgroundTransparency = 1
    topbar.Parent = mainFrame

    local logo = Instance.new("ImageLabel")
    logo.Size = UDim2.new(0, 24, 0, 24)
    logo.Position = UDim2.new(0, 16, 0, 12)
    logo.BackgroundTransparency = 1
    logo.Image = options.Logo or "rbxassetid://111673746737789"
    logo.ImageColor3 = accentColor
    logo.Parent = topbar

    local titleLbl = Instance.new("TextLabel")
    titleLbl.Size = UDim2.new(0, 260, 0, 20)
    titleLbl.Position = UDim2.new(0, 48, 0, 8)
    titleLbl.Text = titleText
    titleLbl.TextColor3 = textColor
    titleLbl.Font = Enum.Font.GothamBold
    titleLbl.TextSize = 14
    titleLbl.TextXAlignment = Enum.TextXAlignment.Left
    titleLbl.BackgroundTransparency = 1
    titleLbl.Parent = topbar

    local subLbl = Instance.new("TextLabel")
    subLbl.Size = UDim2.new(0, 260, 0, 16)
    subLbl.Position = UDim2.new(0, 48, 0, 26)
    subLbl.Text = descText
    subLbl.TextColor3 = Color3.fromRGB(140, 145, 165)
    subLbl.Font = Enum.Font.Gotham
    subLbl.TextSize = 11
    subLbl.TextXAlignment = Enum.TextXAlignment.Left
    subLbl.BackgroundTransparency = 1
    subLbl.Parent = topbar

    local closeBtn = Instance.new("TextButton")
    closeBtn.Size = UDim2.new(0, 28, 0, 28)
    closeBtn.Position = UDim2.new(1, -38, 0, 10)
    closeBtn.BackgroundColor3 = Color3.fromRGB(24, 25, 32)
    closeBtn.TextColor3 = Color3.fromRGB(160, 165, 180)
    closeBtn.Text = "✕"
    closeBtn.Font = Enum.Font.GothamBold
    closeBtn.TextSize = 12
    closeBtn.Parent = topbar
    local closeCorner = Instance.new("UICorner")
    closeCorner.CornerRadius = UDim.new(0, 8)
    closeCorner.Parent = closeBtn

    closeBtn.MouseButton1Click:Connect(function()
        screenGui:Destroy()
        if onDenied then onDenied("Отменено пользователем") end
    end)

    -- Left Column: License Key Input & Action Buttons
    local leftCol = Instance.new("Frame")
    leftCol.Size = UDim2.new(0, 260, 1, -56)
    leftCol.Position = UDim2.new(0, 16, 0, 48)
    leftCol.BackgroundTransparency = 1
    leftCol.Parent = mainFrame

    local keyHeader = Instance.new("TextLabel")
    keyHeader.Size = UDim2.new(1, 0, 0, 20)
    keyHeader.Position = UDim2.new(0, 0, 0, 6)
    keyHeader.Text = "🔑 License key"
    keyHeader.TextColor3 = Color3.fromRGB(210, 215, 230)
    keyHeader.Font = Enum.Font.GothamMedium
    keyHeader.TextSize = 12
    keyHeader.TextXAlignment = Enum.TextXAlignment.Left
    keyHeader.BackgroundTransparency = 1
    keyHeader.Parent = leftCol

    local inputBox = Instance.new("TextBox")
    inputBox.Size = UDim2.new(1, 0, 0, 42)
    inputBox.Position = UDim2.new(0, 0, 0, 32)
    inputBox.BackgroundColor3 = cardColor
    inputBox.TextColor3 = textColor
    inputBox.PlaceholderText = "Paste your key here"
    inputBox.PlaceholderColor3 = Color3.fromRGB(100, 105, 125)
    inputBox.Font = Enum.Font.GothamMedium
    inputBox.TextSize = 12
    inputBox.ClearTextOnFocus = false
    inputBox.Parent = leftCol
    local inCorner = Instance.new("UICorner")
    inCorner.CornerRadius = UDim.new(0, 10)
    inCorner.Parent = inputBox
    local inStroke = Instance.new("UIStroke")
    inStroke.Color = strokeColor
    inStroke.Thickness = 1
    inStroke.Parent = inputBox

    -- Buttons row
    local submitBtn = Instance.new("TextButton")
    submitBtn.Size = UDim2.new(0, 124, 0, 38)
    submitBtn.Position = UDim2.new(0, 0, 0, 84)
    submitBtn.BackgroundColor3 = submitColor
    submitBtn.TextColor3 = (submitColor.R * 0.299 + submitColor.G * 0.587 + submitColor.B * 0.114 > 0.5) and Color3.fromRGB(10, 10, 10) or Color3.fromRGB(255, 255, 255)
    submitBtn.Text = "→ Submit"
    submitBtn.Font = Enum.Font.GothamBold
    submitBtn.TextSize = 13
    submitBtn.Parent = leftCol
    local subCorner = Instance.new("UICorner")
    subCorner.CornerRadius = UDim.new(0, 10)
    subCorner.Parent = submitBtn

    local getKeyBtn = Instance.new("TextButton")
    getKeyBtn.Size = UDim2.new(0, 128, 0, 38)
    getKeyBtn.Position = UDim2.new(1, -128, 0, 84)
    getKeyBtn.BackgroundColor3 = Color3.fromRGB(24, 26, 34)
    getKeyBtn.TextColor3 = Color3.fromRGB(220, 225, 240)
    getKeyBtn.Text = "🌐 Get a key"
    getKeyBtn.Font = Enum.Font.GothamMedium
    getKeyBtn.TextSize = 12
    getKeyBtn.Parent = leftCol
    local gkCorner = Instance.new("UICorner")
    gkCorner.CornerRadius = UDim.new(0, 10)
    gkCorner.Parent = getKeyBtn
    local gkStroke = Instance.new("UIStroke")
    gkStroke.Color = Color3.fromRGB(42, 46, 60)
    gkStroke.Thickness = 1
    gkStroke.Parent = getKeyBtn

    local statusLbl = Instance.new("TextLabel")
    statusLbl.Size = UDim2.new(1, 0, 0, 48)
    statusLbl.Position = UDim2.new(0, 0, 0, 130)
    statusLbl.Text = ""
    statusLbl.TextColor3 = Color3.fromRGB(240, 120, 120)
    statusLbl.Font = Enum.Font.Gotham
    statusLbl.TextSize = 11
    statusLbl.TextWrapped = true
    statusLbl.BackgroundTransparency = 1
    statusLbl.Parent = leftCol

    -- Right Column: Ophyn Info Cards (Game & Player)
    local rightCol = Instance.new("Frame")
    rightCol.Size = UDim2.new(0, 216, 1, -56)
    rightCol.Position = UDim2.new(1, -232, 0, 48)
    rightCol.BackgroundTransparency = 1
    rightCol.Parent = mainFrame

    -- Card 1: Detected Game
    local gameCard = Instance.new("Frame")
    gameCard.Size = UDim2.new(1, 0, 0, 68)
    gameCard.Position = UDim2.new(0, 0, 0, 6)
    gameCard.BackgroundColor3 = Color3.fromRGB(20, 22, 28)
    gameCard.Parent = rightCol
    local gCorner = Instance.new("UICorner")
    gCorner.CornerRadius = UDim.new(0, 12)
    gCorner.Parent = gameCard
    local gStroke = Instance.new("UIStroke")
    gStroke.Color = Color3.fromRGB(36, 40, 52)
    gStroke.Parent = gameCard

    local gameIcon = Instance.new("ImageLabel")
    gameIcon.Size = UDim2.new(0, 42, 0, 42)
    gameIcon.Position = UDim2.new(0, 10, 0, 13)
    gameIcon.BackgroundColor3 = Color3.fromRGB(28, 30, 40)
    gameIcon.Image = "rbxthumb://type=Asset&id=" .. tostring(game.PlaceId) .. "&w=150&h=150"
    gameIcon.Parent = gameCard
    local giCorner = Instance.new("UICorner")
    giCorner.CornerRadius = UDim.new(0, 8)
    giCorner.Parent = gameIcon

    local gameTitle = "Roblox Game"
    pcall(function()
        local info = MarketplaceService:GetProductInfo(game.PlaceId)
        if info and info.Name then gameTitle = info.Name end
    end)

    local gNameLbl = Instance.new("TextLabel")
    gNameLbl.Size = UDim2.new(1, -62, 0, 18)
    gNameLbl.Position = UDim2.new(0, 58, 0, 14)
    gNameLbl.Text = gameTitle
    gNameLbl.TextColor3 = Color3.fromRGB(240, 240, 245)
    gNameLbl.Font = Enum.Font.GothamBold
    gNameLbl.TextSize = 12
    gNameLbl.TextXAlignment = Enum.TextXAlignment.Left
    gNameLbl.TextTruncate = Enum.TextTruncate.AtEnd
    gNameLbl.BackgroundTransparency = 1
    gNameLbl.Parent = gameCard

    local gStatusLbl = Instance.new("TextLabel")
    gStatusLbl.Size = UDim2.new(1, -62, 0, 16)
    gStatusLbl.Position = UDim2.new(0, 58, 0, 34)
    gStatusLbl.Text = "● Detected & Supported"
    gStatusLbl.TextColor3 = Color3.fromRGB(16, 185, 129)
    gStatusLbl.Font = Enum.Font.Gotham
    gStatusLbl.TextSize = 10
    gStatusLbl.TextXAlignment = Enum.TextXAlignment.Left
    gStatusLbl.BackgroundTransparency = 1
    gStatusLbl.Parent = gameCard

    -- Card 2: User Profile Welcome
    local lp = Players.LocalPlayer
    local userCard = Instance.new("Frame")
    userCard.Size = UDim2.new(1, 0, 0, 68)
    userCard.Position = UDim2.new(0, 0, 0, 82)
    userCard.BackgroundColor3 = Color3.fromRGB(20, 22, 28)
    userCard.Parent = rightCol
    local uCorner = Instance.new("UICorner")
    uCorner.CornerRadius = UDim.new(0, 12)
    uCorner.Parent = userCard
    local uStroke = Instance.new("UIStroke")
    uStroke.Color = Color3.fromRGB(36, 40, 52)
    uStroke.Parent = userCard

    local userAvatar = Instance.new("ImageLabel")
    userAvatar.Size = UDim2.new(0, 42, 0, 42)
    userAvatar.Position = UDim2.new(0, 10, 0, 13)
    userAvatar.BackgroundColor3 = Color3.fromRGB(28, 30, 40)
    userAvatar.Image = lp and ("rbxthumb://type=AvatarHeadShot&id=" .. tostring(lp.UserId) .. "&w=100&h=100") or "rbxassetid://111673746737789"
    userAvatar.Parent = userCard
    local uaCorner = Instance.new("UICorner")
    uaCorner.CornerRadius = UDim.new(1, 0)
    uaCorner.Parent = userAvatar

    local uWelcomeLbl = Instance.new("TextLabel")
    uWelcomeLbl.Size = UDim2.new(1, -62, 0, 16)
    uWelcomeLbl.Position = UDim2.new(0, 58, 0, 14)
    uWelcomeLbl.Text = "Welcome Back!"
    uWelcomeLbl.TextColor3 = Color3.fromRGB(150, 155, 175)
    uWelcomeLbl.Font = Enum.Font.Gotham
    uWelcomeLbl.TextSize = 11
    uWelcomeLbl.TextXAlignment = Enum.TextXAlignment.Left
    uWelcomeLbl.BackgroundTransparency = 1
    uWelcomeLbl.Parent = userCard

    local uNameLbl = Instance.new("TextLabel")
    uNameLbl.Size = UDim2.new(1, -62, 0, 18)
    uNameLbl.Position = UDim2.new(0, 58, 0, 32)
    uNameLbl.Text = lp and lp.Name or "Player"
    uNameLbl.TextColor3 = Color3.fromRGB(255, 255, 255)
    uNameLbl.Font = Enum.Font.GothamBold
    uNameLbl.TextSize = 12
    uNameLbl.TextXAlignment = Enum.TextXAlignment.Left
    uNameLbl.TextTruncate = Enum.TextTruncate.AtEnd
    uNameLbl.BackgroundTransparency = 1
    uNameLbl.Parent = userCard

    -- Action handlers
    getKeyBtn.MouseButton1Click:Connect(function()
        if setclipboard then
            setclipboard(tostring(getKeyUrl))
            statusLbl.TextColor3 = Color3.fromRGB(16, 185, 129)
            statusLbl.Text = "Ссылка скопирована в буфер обмена!"
        else
            statusLbl.TextColor3 = Color3.fromRGB(240, 176, 108)
            statusLbl.Text = tostring(getKeyUrl)
        end
    end)

    submitBtn.MouseButton1Click:Connect(function()
        local entered = inputBox.Text:gsub("%s+", "")
        if #entered == 0 then
            statusLbl.TextColor3 = Color3.fromRGB(240, 120, 120)
            statusLbl.Text = "Вставьте ваш лицензионный ключ!"
            return
        end

        submitBtn.Text = "Checking..."
        submitBtn.BackgroundColor3 = Color3.fromRGB(20, 100, 75)

        task.spawn(function()
            local success, res = self:Authenticate(entered)
            if success then
                statusLbl.TextColor3 = Color3.fromRGB(16, 185, 129)
                statusLbl.Text = "Успешно! Тариф: " .. self:GetPlan()
                self:SaveKey(fileName, entered)
                task.wait(0.6)
                screenGui:Destroy()
                self:Notify("UnoAuth", "Доступ разрешен! Приятной игры.", 4)
                if onApproved then onApproved(res) end
            else
                submitBtn.Text = "→ Submit"
                submitBtn.BackgroundColor3 = Color3.fromRGB(16, 185, 129)
                statusLbl.TextColor3 = Color3.fromRGB(240, 120, 120)
                statusLbl.Text = tostring(self.LastError or res or "Ошибка проверки ключа")
            end
        end)
    end)

    local parented = false
    if parentGui then
        pcall(function()
            screenGui.Parent = parentGui
            parented = true
        end)
    end
    if not parented then
        pcall(function()
            local lp = Players.LocalPlayer or Players.PlayerAdded:Wait()
            if lp then
                screenGui.Parent = lp:WaitForChild("PlayerGui", 5) or lp:FindFirstChildOfClass("PlayerGui")
            end
        end)
    end
end

return UnoAuth