print("Hello, ESP32!")
from machine import Pin
import time

# Pin Definitions
BTN_INC_PIN = 12
BTN_DEC_PIN = 14
LED_GREEN_PIN = 18
LED_RED_PIN = 19
LED_YELLOW_PIN = 21
LED_BLUE_PIN = 22

# Setup Inputs
btn_inc = Pin(BTN_INC_PIN, Pin.IN, Pin.PULL_DOWN)
btn_dec = Pin(BTN_DEC_PIN, Pin.IN, Pin.PULL_DOWN)

# Setup Outputs
led_green = Pin(LED_GREEN_PIN, Pin.OUT)
led_red = Pin(LED_RED_PIN, Pin.OUT)
led_yellow = Pin(LED_YELLOW_PIN, Pin.OUT)
led_blue = Pin(LED_BLUE_PIN, Pin.OUT)

# System Variables
count = 0
MAX_CAPACITY = 15

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

# Initialize System State
update_state_leds()
print(f"System Ready. Initial Count: {count}")

last_inc = 0
last_dec = 0

while True:
    curr_inc = btn_inc.value()
    curr_dec = btn_dec.value()

    # Entry Logic
    if curr_inc == 1 and last_inc == 0:
        if count < MAX_CAPACITY:
            count += 1
            print(f"Car Entered. Total: {count}")
            update_state_leds()
            led_yellow.value(1)
            time.sleep(0.2)
            led_yellow.value(0)
        else:
            print("Garage Full! Entry Request Ignored.")
        time.sleep(0.1)

    # Exit Logic
    if curr_dec == 1 and last_dec == 0:
        if count > 0:
            count -= 1
            print(f"Car Exited. Total: {count}")
            update_state_leds()
            led_blue.value(1)
            time.sleep(0.2)
            led_blue.value(0)
        else:
            print("Garage Empty! Exit Request Ignored.")
        time.sleep(0.1)

    last_inc = curr_inc
    last_dec = curr_dec
    time.sleep(0.02)