import time
import dht
from machine import Pin

SENSOR_READ_PERIOD = const(2)

class Sensor:
  last_read_time: int
  last_result: tuple[int, int]

  sensor: dht.DHT11

  def __init__(self, sensor_data_pin: Pin) -> None:
    self.sensor = dht.DHT11(sensor_data_pin)
    self.last_read_time = time.time()
    self.last_result = (0, 0)

  def __should_read_data(self) -> bool:
    return (time.time() - self.last_read_time) > SENSOR_READ_PERIOD

  def read(self) -> tuple[int, int]:
    if not self.__should_read_data():
      print("should not read data")
      return self.last_result

    sensor = self.sensor

    try:
      sensor.measure()
      result = (sensor.temperature(), sensor.humidity())
      self.last_result = result
    except OSError as e:
      print("err reading sensor", e)
      return self.last_result

    return result