import ubinascii, umqtt.robust as MQTTClient, time, math
from machine import Pin, ADC, unique_id

pin1 = Pin(4, Pin.OUT)
pin2 = Pin(15, Pin.OUT)
pin3 = Pin(14, Pin.OUT)
pin4 = Pin(12, Pin.OUT)

WEIGHT = 10
WILDCARD_TOPIC = b"g11/#"
AIR_TOPIC = b"g11/air"
SENSOR_TOPIC = b"g11/sensor"
PING_TOPIC = b"g11/ping"

CLIENT_ID = ubinascii.hexlify(unique_id())
mqtt = MQTTClient.MQTTClient(CLIENT_ID, "broker.mqtt-cpe.ml", user="None", password="None")

_sensor_value = 0

def sensor_value():
  global _sensor_value
  _sensor_value = (_sensor_value * (WEIGHT - 1) + ADC(0).read()) / WEIGHT

  return _sensor_value


def turn_on():
  pin1(0)
  pin2(1)


def turn_off():
  pin1(0)
  pin2(0)

def beep(duty=512, period=100):
  beep.duty(duty)
  time.sleep_ms(period)
  beep.duty(0)

def onmessage(topic, message):
  message = message.decode("ascii")
  topic = topic.decode("ascii")

  if topic == AIR_TOPIC and message == 'on' :
    turn_on()
  else:
    turn_off()


simple_scheduler_timer = time.time()

def scheduler_tick(period=1):
  global timesimple_scheduler_timer

  if time.time() - timesimple_scheduler_timer < period:
    return False

  simple_scheduler_timer = time.time()

  return True


def main():
  mqtt.set_callback(onmessage)
  mqtt.connect()
  mqtt.subscribe(WILDCARD_TOPIC)

  while True:
    mqtt.check_msg()
    if scheduler_tick():
      mqtt.publish(SENSOR_TOPIC, str(sensor_value()))
    time.sleep(1000)
    mqtt.publish(PING_TOPIC, "iamalive")
    beep()