import network
from machine import Pin, ADC, PWM
from time import sleep
import blynklib_mp as blynklib

# 🔹 Blynk credentials
BLYNK_AUTH = "8o5jsHYjCm9NNzoshlfHNT4pKxADMmjS"

# 🔹 WiFi credentials
WIFI_SSID = "Wokwi-GUEST"
WIFI_PASS = ""

# 🔹 Connect to WiFi
print("Connecting to WiFi...")
wifi = network.WLAN(network.STA_IF)
wifi.active(True)
wifi.connect(WIFI_SSID, WIFI_PASS)
while not wifi.isconnected():
    sleep(0.5)
print("✅ Connected:", wifi.ifconfig())

# 🔹 Initialize Blynk
blynk = blynklib.Blynk(BLYNK_AUTH)

# 🔹 Sensor and Actuator setup
gas_sensor = ADC(Pin(34))
gas_sensor.atten(ADC.ATTN_11DB)
gas_sensor.width(ADC.WIDTH_12BIT)

pir = Pin(32, Pin.IN)
servo = PWM(Pin(25), freq=50)

def set_servo(angle):
    duty = int(((angle / 180) * 2 + 0.5) / 20 * 1023)
    servo.duty(duty)

# 🔹 Optional: Handle button from Blynk app (Virtual Pin V3)
@blynk.handle_event("write V3")
def control_from_blynk(pin, value):
    if int(value[0]) == 1:
        set_servo(90)
        print("🔄 Servo opened by Blynk button")
    else:
        set_servo(0)
        print("🔄 Servo closed by Blynk button")

# 🔹 Main Loop
while True:
    blynk.run()  # Required for communication with Blynk server

    gas_value = gas_sensor.read()
    pir_status = pir.value()

    print("Gas Value:", gas_value, "| PIR:", pir_status)

    # Send sensor data to Blynk
    blynk.virtual_write(0, gas_value)  # Gas value → V0
    blynk.virtual_write(1, pir_status) # PIR status → V1

    # Hazard condition
    if gas_value > 1000 or pir_status == 1:
        set_servo(90)
        blynk.virtual_write(2, 1)  # Send alert to V2
        print("⚠ Hazard Detected! Warning System Activated.")
    else:
        set_servo(0)
        blynk.virtual_write(2, 0)  # Safe status
        print("✅ Zone Safe.")

    sleep(2)