local modem = peripheral.wrap("left")
local diskDrive = peripheral.wrap("right")
modem.open(420)

function getName()
    shell.execute("clear")
    print("Name of new card user:")
    local name = read()
    print("Checking if card name already exists...")
    modem.transmit(420, 420, name)
    local _, side, freq, rfreq, message = os.pullEvent('modem_message')
    if message[1] == "Found" then
        print("Card already exists, please use a different name. Stopping program.")
        print("Current balance: "..message[2])
        diskDrive.setDiskLabel(name.." $"..message[2].." - GraviCard")
        sleep(2)
        return
    elseif message[1] == "Not Found" then
        print("Card created.")
        print("Name: "..name.." Current balance: 0")
        diskDrive.setDiskLabel(name.." $"..message[2].." - GraviCard")
        sleep(2)
    end
end

shell.execute("clear")
print("Welcome to the GraviCard card setup!")
sleep(2)
if diskDrive.isDiskPresent() then
    getName()
else
    print("Please insert a disk in the disk drive.")
    sleep(2)
end
shell.execute("clear")