seth mc atm terminal

-- ATM Terminal Script (atm.lua)

local modem = peripheral.find("modem")
if not modem then error("No modem found") end
modem.open(2)  -- Open channel 2 for communication with turtle

local function sendToTurtle(message)
    modem.transmit(2, 2, message)
end

local function waitForTurtleResponse()
    while true do
        local event, side, channel, replyChannel, message = os.pullEvent("modem_message")
        if channel == 2 then
            return message
        end
    end
end

local function login()
    term.clear()
    term.setCursorPos(1,1)
    write("Enter student ID: ")
    local studentId = read()
    write("Enter password: ")
    local password = read("*")
    return studentId, password
end

local function getBalance(studentId, password)
    sendToTurtle({action="withdraw", studentId=studentId, password=password, amount=0})
    local response = waitForTurtleResponse()
    if response.action == "complete" and response.success then
        return tonumber(response.newBalance)
    else
        return nil
    end
end

local function displayStatus(message)
    local w, h = term.getSize()
    local y = h - 1
    term.setCursorPos(1, y)
    term.clearLine()
    write(message)
end

local function deposit(studentId, password)
    write("Enter amount to deposit (or 'max'): ")
    local input = read()
    local amount = tonumber(input)
    local isMax = (input:lower() == "max")

    if not isMax and (not amount or amount <= 0) then
        print("Invalid amount. Must be positive or 'max'.")
        sleep(2)
        return
    end
    if not isMax and amount % 1 ~= 0 then
        print("Invalid amount. Whole Eddies only.")
        sleep(2)
        return
    end

    print("1 Eddie = 16 Gold Ingots")
    if isMax then
        print("Please place ALL your Gold Ingots in the barrel.")
    else
        print("Please place " .. (amount * 16) .. " Gold Ingots in the barrel.")
    end
    print("Press Enter when ready.")
    read()

    displayStatus("Initiating deposit...")
    sendToTurtle({action="deposit", studentId=studentId, password=password, amount=isMax and "max" or amount})

    while true do
        local response = waitForTurtleResponse()
        if response.action == "progress" then
            if isMax then
                 displayStatus("Collecting Gold...")
            else
                 displayStatus("Collecting Gold: " .. (response.collected or 0) .. "/" .. (amount * 16))
            end
        elseif response.action == "complete" then
            if response.success then
                print("Deposit successful.")
                print("Deposited: " .. (response.amountDeposited or "Unknown") .. " Eddies")
                if response.remainder and response.remainder > 0 then
                    print("Returned: " .. response.remainder .. " Gold Ingots (Remainder)")
                    print("Please collect remainder from barrel.")
                end
                print("New balance: " .. response.newBalance .. " Eddies")
            else
                print("Deposit failed: " .. response.error)
            end
            break
        end
    end

    print("Press Enter to continue...")
    read()
end

local function withdraw(studentId, password)
    write("Enter amount to withdraw: ")
    local amount = tonumber(read())
    if not amount or amount <= 0 then
        print("Invalid amount. Must be positive.")
        sleep(2)
        return
    end
    if amount % 1 ~= 0 then
        print("Invalid amount. Whole Eddies only.")
        sleep(2)
        return
    end

    displayStatus("Initiating withdrawal...")
    sendToTurtle({action="withdraw", studentId=studentId, password=password, amount=amount})

    while true do
        local response = waitForTurtleResponse()
        if response.action == "progress" then
            displayStatus("Dispensing Gold: " .. (response.dispensed or 0) .. "/" .. (amount * 16))
        elseif response.action == "complete" then
            if response.success then
                print("Withdrawal successful. New balance: " .. response.newBalance .. " Eddies")
                print("Please collect your " .. (amount * 16) .. " Gold Ingots from the barrel.")
            else
                print("Withdrawal failed: " .. response.error)
            end
            break
        end
    end

    print("Press Enter to continue...")
    read()
end

local function main()
    while true do
        term.clear()
        term.setCursorPos(1,1)
        print("Welcome to ATM")
        print("1. Login")
        local choice = read()
        if choice == "1" then
            local studentId, password = login()
            if studentId then
                local balance = getBalance(studentId, password)
                if balance then
                    while true do
                        term.clear()
                        term.setCursorPos(1,1)
                        print("Current balance: " .. balance .. " Eddies")
                        print("1. Deposit")
                        print("2. Withdraw")
                        print("3. Logout")
                        local option = read()
                        if option == "1" then
                            deposit(studentId, password)
                            balance = getBalance(studentId, password)
                        elseif option == "2" then
                            withdraw(studentId, password)
                            balance = getBalance(studentId, password)
                        elseif option == "3" then
                            break
                        end
                    end
                else
                    print("Failed to retrieve balance. Please try again.")
                    sleep(2)
                end
            end
        end
    end
end

print("Initializing ATM...")
local success, err = pcall(main)
if not success then
    print("CRITICAL ERROR: " .. tostring(err))
    print("Press Enter to exit...")
    read()
end