-- Define helper functions for each action
local function changePassword(username)
    print("Enter new password:")
    local newPassword = io.read()
    local passwordFile = "/disk/users/" .. username .. "/password.txt"
    local file = io.open(passwordFile, "w")
    if file then
        file:write(newPassword)
        file:close()
        print("Password changed successfully.")
    else
        print("Error: Could not open password file.")
    end
end

local function changeUsername(currentUsername)
    print("Enter new username:")
    local newUsername = io.read()
    local oldDir = "/disk/users/" .. currentUsername
    local newDir = "/disk/users/" .. newUsername

    -- Rename the directory
    os.rename(oldDir, newDir)
    print("Username changed successfully.")
end

local function removePassword(username)
    local passwordFile = "/disk/users/" .. username .. "/password.txt"
    local file = io.open(passwordFile, "w")
    if file then
        file:write("")
        file:close()
        print("Password removed successfully.")
    else
        print("Error: Could not open password file.")
    end
end

local function securityCardLogin()
    os.execute("/disk/os/sclogin.lua")
end

local function deleteUser(username)
    print("Enter password to confirm user deletion:")
    local enteredPassword = io.read()
    local passwordFile = "/disk/users/" .. username .. "/password.txt"
    local file = io.open(passwordFile, "r")

    if file then
        local correctPassword = file:read()
        file:close()

        if enteredPassword == correctPassword then
            print("Are you sure you want to delete user '" .. username .. "'? (y/n)")
            local confirmation = io.read()

            if confirmation == "y" then
                -- Delete the user's directory and its contents
                local userDir = "/disk/users/" .. username
                os.remove(userDir)
                print("User '" .. username .. "' deleted successfully.")
            else
                print("User deletion cancelled.")
            end
        else
            print("Incorrect password.")
        end
    else
        print("Error: Could not open password file.")
    end
end

-- Main program logic
local function main()
    -- Get the current username from the .currentusr file
    local currentUsrFile = io.open(".currentusr", "r")
    local currentUsername = ""
    if currentUsrFile then
        currentUsername = currentUsrFile:read()
        currentUsrFile:close()
    else
        print("Error: Could not open .currentusr file.")
        return
    end

    print("Welcome, " .. currentUsername)
    print("1. Change password")
    print("2. Change username")
    print("3. Remove password")
    print("4. Security card login")
    print("5. Delete user")
    print("Enter the number of the action you want to perform:")

    local choice = tonumber(io.read())

    if choice == 1 then
        changePassword(currentUsername)
    elseif choice == 2 then
        changeUsername(currentUsername)
    elseif choice == 3 then
        removePassword(currentUsername)
    elseif choice == 4 then
        securityCardLogin()
    elseif choice == 5 then
        deleteUser(currentUsername)
    else
        print("Invalid choice.")
    end
end

-- Run the main function
main()