Enterprise blocker

local MAX_ATTEMPTS = 3   -- Maximum number of incorrect password attempts allowed
local LOCKOUT_TIME = 30  -- Lockout time in seconds after reaching maximum attempts

local USERS_FOLDER = "/disk/users/"
local ERROR_FOLDER = "/disk/error/"
local OS_GUI_PROGRAM = "/disk/os/gui"
local NOT_ADMIN_MESSAGE = "This user is not an admin."

local function getUserCredentials(username)
    local passwordFile = fs.combine(USERS_FOLDER .. username, "password.txt")

    if fs.exists(passwordFile) then
        local file = fs.open(passwordFile, "r")
        local storedPassword = file.readLine()
        file.close()
        return storedPassword
    else
        return nil  -- User does not exist
    end
end

local function getAdminCredentials()
    local adminFile = "/disk/admin.txt"

    if fs.exists(adminFile) then
        local file = fs.open(adminFile, "r")
        local storedPassword = file.readLine()
        file.close()
        return storedPassword
    else
        return nil  -- Admin file does not exist
    end
end

local function checkCredentials(username)
    if username == "admin" then
        local storedPassword = getAdminCredentials()

        if not storedPassword then
            return false  -- Admin credentials not set
        end

        local attempts = 0

        repeat
            term.clear()
            term.setCursorPos(1, 1)
            print("Enter password for " .. username .. ":")
            local enteredPassword = read("*")
            attempts = attempts + 1

            if enteredPassword == storedPassword then
                return true
            else
                print("Incorrect password. Attempts left: " .. tostring(MAX_ATTEMPTS - attempts))
            end
        until attempts >= MAX_ATTEMPTS

        print("Too many incorrect attempts. Locked out for " .. LOCKOUT_TIME .. " seconds.")
        os.sleep(LOCKOUT_TIME)
        return false
    else
        -- Non-admin users are not allowed to log in
        print(NOT_ADMIN_MESSAGE)
        return false
    end
end

local function main()
    term.clear()
    term.setCursorPos(1, 1)

    print("Enter username:")
    local enteredUsername = read()

    if checkCredentials(enteredUsername) then
        print("Access granted. Welcome, " .. enteredUsername .. "!")
        shell.run(OS_GUI_PROGRAM)  -- Run the OS GUI after successful login
    end
end

main()