from django.apps import AppConfig

import logging
import sys

from coffee_scale import mqtt


class CoffeeScaleConfig(AppConfig):
    name = 'coffee_scale'

    def ready(self):
        if ('makemigrations' in sys.argv or 'migrate' in sys.argv):
            return

        try:
            logging.info('Connecting to MQTT (coffee scale) at {}...'.format(mqtt.HOST))
            logging.info('If there is no confirmation, the MQTT connection has probably failed.')
            mqtt.client.connect_async(mqtt.HOST, mqtt.PORT, 60)
            mqtt.client.loop_start()
        except Exception as ex:
            logging.error(ex)
            logging.error('Failed to connect to MQTT at {}'.format(mqtt.HOST))