from machine import Pin
from time import sleep

in_button = Pin(34, Pin.IN, Pin.PULL_UP)
out_button = Pin(35, Pin.IN, Pin.PULL_UP)


led_ports = [2, 4, 5, 13, 14, 16, 18, 27]
parking_lights = [Pin(pin, Pin.OUT) for pin in led_ports]


car_total = 0
parking_capacity = len(parking_lights)


def update_parking_display():
    for index in range(parking_capacity):
        if index < car_total:
            parking_lights[index].value(1)
        else:
            parking_lights[index].value(0)


prev_in = 1
prev_out = 1

while True:
    in_state = in_button.value()
    out_state = out_button.value()

    
    if prev_in == 1 and in_state == 0:
        if car_total < parking_capacity:
            car_total += 1
            update_parking_display()
            print("Car entered")
        sleep(0.2)

    
    if prev_out == 1 and out_state == 0:
        if car_total > 0:
            car_total -= 1
            update_parking_display()
            print("Car exited")
        sleep(0.2)

    prev_in = in_state
    prev_out = out_state