from machine import Pin
import time



btn_inc = Pin(12, Pin.IN, Pin.PULL_UP)
btn_dec = Pin(14, Pin.IN, Pin.PULL_UP)


led_green = Pin(18, Pin.OUT)  
led_red = Pin(19, Pin.OUT)    
led_yellow = Pin(2, Pin.OUT)  
led_blue = Pin(4, Pin.OUT)   


car_count = 0
MAX_CAPACITY = 15


last_inc_state = 1
last_dec_state = 1

def update_state_leds(count):
    
    if count < MAX_CAPACITY:
        led_green.value(1)
        led_red.value(0)
    else:
        led_green.value(0)
        led_red.value(1)

def trigger_event_led(led):
    
    led.value(1)
    time.sleep(0.3)
    led.value(0)


update_state_leds(car_count)

print(f"System Ready. Current Car Count: {car_count}/{MAX_CAPACITY}")


while True:
    current_inc_state = btn_inc.value()
    current_dec_state = btn_dec.value()

   
    if last_inc_state == 1 and current_inc_state == 0:
        if car_count < MAX_CAPACITY:
            car_count += 1
            print(f"Accepted Entry! Current Count: {car_count}")
            update_state_leds(car_count)
            trigger_event_led(led_yellow)  
        else:
            print("Entry Denied! Garage is Full (15). Event ignored.")
        time.sleep(0.05)  # مانع التذبذب (Debounce)

    

    if last_dec_state == 1 and current_dec_state == 0:
        if car_count > 0:
            car_count -= 1
            print(f"Accepted Exit! Current Count: {car_count}")
            update_state_leds(car_count)
            trigger_event_led(led_blue) 

            print("Exit Denied! Garage is Empty (0). Event ignored.")
        time.sleep(0.05) 

    last_inc_state = current_inc_state
    last_dec_state = current_dec_state

    time.sleep(0.01)