import machine
import time

led_green = machine.Pin(5, machine.Pin.OUT)
led_red = machine.Pin(15, machine.Pin.OUT)
led_yellow = machine.Pin(4, machine.Pin.OUT)
led_blue = machine.Pin(14, machine.Pin.OUT)

btn_enter = machine.Pin(19, machine.Pin.IN, machine.Pin.PULL_UP)
btn_exit = machine.Pin(32, machine.Pin.IN, machine.Pin.PULL_UP)

cars_in_garage = 0
MAX_CARS = 15

led_yellow.value(0)
led_blue.value(0)

print("Smart Garage System Started. Cars: 0")

while True:
    if btn_enter.value() == 0:
        if cars_in_garage < MAX_CARS:
            cars_in_garage += 1
            print("Car entered! Total cars:", cars_in_garage)
            
            led_yellow.value(1)
            time.sleep(0.5)      
            led_yellow.value(0)
        else:
            print("Garage is full! No more space.")
            
        time.sleep(0.2)      

    if btn_exit.value() == 0:
        if cars_in_garage > 0: 
            cars_in_garage -= 1
            print("Car exited! Total cars:", cars_in_garage)
            
            led_blue.value(1)
            time.sleep(0.5)
            led_blue.value(0)
        else:
            print("Garage is already empty!")
            
        time.sleep(0.2)      

    if cars_in_garage < MAX_CARS:
        led_green.value(1)
        led_red.value(0)
    else:
        led_green.value(0)
        led_red.value(1)

    time.sleep(0.05)