import network
import urequests
import dht
from machine import Pin
from time import sleep
import ntptime
import time
import random

# ===============================
# MODE SELECT
# ===============================
SIMULATION = True   # True = fake data | False = real DHT22

# ===============================
# REAL DHT22 SETUP
# ===============================
dht_pin = Pin(4)
dht_sensor = dht.DHT22(dht_pin)

# ===============================
# SIMULATED DHT22 VALUES
# ===============================
temperature = 28.0
humidity = 60.0

def fake_dht_read():
    global temperature, humidity
    temperature += random.uniform(-0.3, 0.3)
    humidity += random.uniform(-1.0, 1.0)

    temperature = max(20.0, min(40.0, temperature))
    humidity = max(30.0, min(90.0, humidity))

    return round(temperature, 1), round(humidity, 1)

# ===============================
# WIFI & SERVER
# ===============================
ssid = 'Wokwi-GUEST'
password = ''

server_url = 'https://script.google.com/macros/s/AKfycbxtylAAwhAMI0JLGR-3wsW8cmrDrTkC5rJOriq8DKiePqbLWRZXAUBRR1vA3hTXHYJ0sA/exec'

ntptime.host = 'pool.ntp.org'

# ===============================
# CONNECT WIFI
# ===============================
def connect_wifi():
    wlan = network.WLAN(network.STA_IF)
    wlan.active(True)
    wlan.connect(ssid, password)

    while not wlan.isconnected():
        print("Connecting to WiFi...")
        sleep(1)

    print("Connected:", wlan.ifconfig())

# ===============================
# GET TIME
# ===============================
def get_ntp_time():
    try:
        ntptime.settime()
        tm = time.localtime()
        return "{:02d}:{:02d}:{:02d}".format(tm[3], tm[4], tm[5])
    except:
        return "00:00:00"

# ===============================
# SEND DATA
# ===============================
def send_data():
    if SIMULATION:
        temperature, humidity = fake_dht_read()
    else:
        try:
            dht_sensor.measure()
            temperature = dht_sensor.temperature()
            humidity = dht_sensor.humidity()
        except OSError as e:
            print("DHT Error:", e)
            return

    timestamp = get_ntp_time()

    print("Sending →", temperature, "°C", humidity, "%", timestamp)

    json_data = {
        "method": "append",
        "temperature": temperature,
        "humidity": humidity,
        "timestamp": timestamp
    }

    try:
        response = urequests.post(server_url, json=json_data)
        print("Response:", response.status_code)
        response.close()
    except Exception as e:
        print("Error:", e)

# ===============================
# MAIN LOOP
# ===============================
def main_loop():
    while True:
        send_data()
        sleep(5)  # ⏱ send interval

# ===============================
# START
# ===============================
connect_wifi()
main_loop()