from machine import Pin
import time

btn_entry = Pin(12, Pin.IN, Pin.PULL_DOWN)
btn_exit = Pin(14, Pin.IN, Pin.PULL_DOWN)

led_green = Pin(2, Pin.OUT)
led_red = Pin(4, Pin.OUT)
led_yellow = Pin(16, Pin.OUT)
led_blue = Pin(17, Pin.OUT)

car_count = 0
MAX_CAPACITY = 15

def update_state_leds():
    if car_count == MAX_CAPACITY:
        led_red.value(1)
        led_green.value(0)
    else:
        led_red.value(0)
        led_green.value(1)

update_state_leds()

while True:
    if btn_entry.value() == 1:
        if car_count < MAX_CAPACITY:
            car_count += 1
            print(f"Accepted Entry. Total cars: {car_count}")
            led_yellow.value(1)
            time.sleep(0.2)
            led_yellow.value(0)
        else:
            print("Ignored Press: Garage Full (15)")
            
        update_state_leds()
        time.sleep(0.3)

    if btn_exit.value() == 1:
        if car_count > 0:
            car_count -= 1
            print(f"Accepted Exit. Total cars: {car_count}")
            led_blue.value(1)
            time.sleep(0.2)
            led_blue.value(0)
        else:
            print("Ignored Press: Garage Empty (0)")
            
        update_state_leds()
        time.sleep(0.3)

    time.sleep(0.05)