import network
from machine import Pin, ADC
from time import sleep
from blynk_simple import Blynk   # use the simple library file

# ====== WiFi & Blynk Config ======
SSID = 'Wokwi-GUEST'
PASSWORD = ''
BLYNK_AUTH = "YdUCZuumhtQY60grWntlka3y3pqPQwgT"

# ====== Hardware Setup ======
pir = Pin(27, Pin.IN)          # Motion sensor
mq2 = ADC(Pin(34))             # Gas sensor
mq2.atten(ADC.ATTN_11DB)
mq2.width(ADC.WIDTH_10BIT)
door = Pin(12, Pin.OUT)        # Door relay
light = Pin(14, Pin.OUT)       # Light controlled by Blynk switch (new)

# ====== Connect WiFi ======
def connect_wifi():
    wlan = network.WLAN(network.STA_IF)
    wlan.active(True)
    if not wlan.isconnected():
        print("Connecting to WiFi...")
        wlan.connect(SSID, PASSWORD)
        while not wlan.isconnected():
            sleep(1)
            print(".", end="")
    print("\n✅ WiFi connected:", wlan.ifconfig())

connect_wifi()

# ====== Initialize Blynk ======
blynk = Blynk(BLYNK_AUTH)
blynk.connect()

# ====== Main Loop ======
while True:
    # --- Sensor readings ---
    gas_value = mq2.read()
    motion = pir.value() == 1
    gas_alert = gas_value > 600

    # --- Door control logic ---
    if motion and gas_alert:
        door.on()
        blynk.virtual_write(0, "Door Open - Gas Alert!")
        blynk.virtual_write(2, 1)
        print(f"🚨 Door Open | Gas: {gas_value}")
    else:
        door.off()
        blynk.virtual_write(0, "Door Closed - Safe")
        blynk.virtual_write(2, 0)
        print(f"✅ Door Closed | Gas: {gas_value}")

    # --- Send gas reading to Blynk ---
    blynk.virtual_write(1, gas_value)

    # --- Read Blynk Light Switch (V3) ---
    light_state = blynk.virtual_read(3)
    if light_state == "1":
        light.on()
        print("💡 Light ON from Blynk")
    elif light_state == "0":
        light.off()
        print("💡 Light OFF from Blynk")

    sleep(2)