-- PIN Lock System

local pin = "1234"
local doorSide = "left"
local alarmSide = "back"

-- Function to check the entered PIN
local function checkPIN(enteredPIN)
    return enteredPIN == pin
end

-- Function to activate the alarm
local function activateAlarm()
    print("Doggy OS Home Security: Intruder Alert!")
    redstone.setOutput(alarmSide, true)
end

-- Function to deactivate the alarm
local function deactivateAlarm()
    redstone.setOutput(alarmSide, false)
    print("Doggy OS Home Security: Alarm Deactivated")
end

-- Function to check if the door is opened without computer activation
local function doorOpenedWithoutActivation()
    local previousDoorStatus = redstone.getInput(doorSide)

    while true do
        sleep(1)  -- Adjust this delay based on how frequently you want to check for the door status

        local currentDoorStatus = redstone.getInput(doorSide)

        if currentDoorStatus and not previousDoorStatus then
            print("Door opened without computer activation. Activating alarm.")
            activateAlarm()
            sleep(5)  -- Adjust this delay based on how long you want the alarm to sound
            deactivateAlarm()
        end

        previousDoorStatus = currentDoorStatus
    end
end

-- Main program
while true do
    term.clear()
    term.setCursorPos(1,1)
    print("Enter PIN to unlock:")
    local enteredPIN = read("*")

    if checkPIN(enteredPIN) then
        print("PIN correct. Unlocking door.")
        redstone.setOutput(doorSide, true)
        sleep(2)  -- Adjust this delay based on your door mechanism
        redstone.setOutput(doorSide, false)
        deactivateAlarm()
        break
    else
        print("Incorrect PIN. Resetting.")
        sleep(2)  -- Adjust this delay based on how long you want to wait before resetting
    end
end

-- Start monitoring the door status
parallel.waitForAny(doorOpenedWithoutActivation)