from machine import Pin, PWM
import time

# Pin definitions
pir_sensor = Pin(13, Pin.IN)
face_button = Pin(12, Pin.IN, Pin.PULL_UP)
finger_button = Pin(14, Pin.IN, Pin.PULL_UP)
red_led = Pin(2, Pin.OUT)
green_led = Pin(4, Pin.OUT)
buzzer = PWM(Pin(15))

def alert():
    print("ALERT! Unknown Face Detected.")
    red_led.value(1)
    buzzer.freq(1000)
    buzzer.duty_u16(30000)
    time.sleep(3)
    buzzer.duty_u16(0)

def fingerprint_alert():
    print("Fingerprint Not Matched!")
    red_led.value(1)
    buzzer.freq(1500)
    buzzer.duty_u16(30000)
    time.sleep(5)
    buzzer.duty_u16(0)

def access_granted():
    print("Access Granted.")
    red_led.value(0)
    green_led.value(1)
    time.sleep(3)
    green_led.value(0)

print("AI Smart Door Security Initialized...")

while True:
    motion = pir_sensor.value()

    if motion:
        print("Motion Detected!")
        time.sleep(0.5)

        # Face recognition simulation
        if face_button.value() == 0:
            print("Face Verified! Access Granted.")
            access_granted()

        else:
            alert()
            print("Photo Captured and Alert Sent!")
            print("Waiting for Fingerprint Verification...")

            time.sleep(0.5)

            # Fingerprint simulation
            if finger_button.value() == 0:
                fingerprint_alert()
            else:
                access_granted()

    else:
        red_led.value(0)
        green_led.value(0)
        buzzer.duty_u16(0)

    time.sleep(0.1)