local accessCode = "147"

local component = require("component")
local sides = require("sides")
local gpu = component.gpu
local event = require("event")
local ser = require("serialization")
local term = require("term")
local computer = component.computer
local rs = component.redstone
keypad = component.os_keypad
alarm = component.os_alarm

customButtons = {"1", "2", "3", "4", "5", "6", "7", "8", "9", "<-", "0", "OK"}
customButtonColor = {"1", "1", "1", "1", "1", "1", "1", "1", "1", "2", "1", "3"}
keypad.setKey(customButtons, customButtonColor)

term.clear()
print("MaksandraSecurity v1.0 [KeyPad Edition]")
print("Система запущена.")
alarm.setRange(150)
local inputStr = ""
while true do
  ev, address, button, button_label = event.pull("keypad")
  if ev then
    if button_label == "OK" then
      if inputStr == accessCode then
    term.write("Доступ разрешен!\n")
    inputStr = "OK!"
    keypad.setDisplay(inputStr)
    computer.beep()
    rs.setOutput(sides.down, 15)
    os.sleep(3)
    rs.setOutput(sides.down, 0)
      else
    term.write("Доступ запрещен!\n")
    inputStr = "Invalid!"
    alarm.activate()
    keypad.setDisplay(inputStr)
    os.sleep(3)
    alarm.deactivate()
      end
      inputStr = ""
    elseif button_label == "<-" then
      if string.len(inputStr) > 0 then
    tmpStr = string.sub(inputStr, 1 , string.len(inputStr) -1)
    inputStr = tmpStr
      end
    else
      inputStr = inputStr .. button_label
    end
        a = inputStr.len(inputStr)
        b = ""
        for i = a,1,-1
        do
            b = b .. "*"
        end
        keypad.setDisplay(b)
  end
  os.sleep(0)
end