from bluepy.btle import DefaultDelegate
from bluepy.btle import Scanner

from data_class import Data
from devices import get_device
from logger import get_logger
logger = get_logger(__name__)

# This is the list, where the responses will be stored from the `handleDiscovery`
devices = []


class ScanDelegate(DefaultDelegate):
  def __init__(self):
    DefaultDelegate.__init__(self)

  def handleDiscovery(self, dev, isNewDev, isNewData):
    global devices

    for (sdid, desc, val) in dev.getScanData():
      if self.is_temperature(sdid, val):
        data_obj = Data(val)

        if self.is_atc_device(dev, data_obj):
          device_from_config = get_device(dev)
          devices.append([dev, data_obj, device_from_config])

  @staticmethod
  def is_temperature(sdid, val):
    if sdid != 22: return False
    if len(val) != 30: return False
    return True

  @staticmethod
  def is_atc_device(dev, data_obj):
    global devices
    if 'A4:C1:38' not in dev.addr.upper(): return False
    for device in devices:
      if str(device[0].addr) == str(dev.addr): return False

    device_from_config = get_device(dev)

    try:logger.info(f"Device: {dev.addr.upper()} ({dev.addrType}), RSSI: {dev.rssi}dB, Room: {device_from_config.room}")
    except:logger.info(f"Device: {dev.addr.upper()} ({dev.addrType}), RSSI: {dev.rssi}dB, Room: ?")
    logger.info(f'\tTemp: {data_obj.temperature}°C, Humid: {data_obj.humidity}%, Batt: {data_obj.battery_percent}%')
    return True


def cleanup():
  global devices
  devices = []


def start_discovery(timeout=20):
  cleanup()
  global devices
  logger.info(f'Start discovery with timout {timeout}s...')

  scanner = Scanner().withDelegate(ScanDelegate())
  scanner.scan(timeout=timeout, passive=False)

  return devices