from pydantic import BaseSettings, Field

from openhab.__init__ import __version__


class Settings(BaseSettings):
    """Application settings for the DSMR MQTT bridge."""

    loglevel: str = Field('INFO', env='LOGLEVEL')

    mqtt_host: str = Field(None, env='MQTT_HOST')
    mqtt_port: int = Field(1883, env='MQTT_PORT')
    mqtt_username: str = Field(None, env='MQTT_USERNAME')
    mqtt_password: str = Field(None, env='MQTT_PASSWORD')

    dsmr_port: str = Field('/dev/ttyUSB0', env='DSMR_PORT')
    dsmr_baudrate: str = Field(115200, env='DSMR_BAUDRATE')
    dsmr_bytesize: str = Field('EIGHTBITS', env='DSMR_BITESIZE')
    dsmr_parity: str = Field('NONE', env='DSMR_PARITY')
    dsmr_stopbits: str = Field('ONE', env='DSMR_STOPBITS')

    homie_update_interval: int = 60
    homie_topic: str = Field('homie', env='HOMIE_TOPIC')
    homie_implementation: str \
        = f"DSMR Homie {VERSION} Homie 4 Version {homie.__version__}"
    homie_fw_name: str = "DSMR"
    homie_fw_version: str = "0.1.0"

    class Config:
        """Where to find the environment file containing the settings."""
        env_file = '.env'