from machine import Pin, I2C
from time import sleep
from hcsr04 import HCSR04
import i2c_lcd

# Ultrasonic sensor setup
sensor = HCSR04(trigger_pin=3, echo_pin=2)

# LED for parking full
led = Pin(14, Pin.OUT)

# LCD setup
i2c = I2C(0, scl=Pin(1), sda=Pin(0), freq=400000)
lcd = i2c_lcd.I2cLcd(i2c, 0x27, 2, 16)

# Parking slots
total_slots = 5
available_slots = 5

lcd.clear()
lcd.putstr("Smart Parking")
sleep(2)

while True:
    distance = sensor.distance_cm()

    if distance < 10:     # Car detected
        if available_slots > 0:
            available_slots -= 1
            lcd.clear()
            lcd.putstr("Car Parked")
            sleep(2)

        else:
            lcd.clear()
            lcd.putstr("Parking Full")
            led.on()
            sleep(2)

    lcd.clear()
    lcd.putstr("Slots Left:")
    lcd.move_to(0,1)
    lcd.putstr(str(available_slots))

    if available_slots > 0:
        led.off()

    sleep(2)