from discord_logging.handler import DiscordHandler
from dotenv import load_dotenv
from configparser import ConfigParser
from pathlib import Path
import logging
import os


# load default values
config = ConfigParser()
config.read(Path(__file__).parent / 'defaults.ini')
LOGGER_LEVEL = config.get('main', 'logger_level')
DISCORD_SERVICE_NAME = config.get('discord', 'service_name')
DISCORD_WEBHOOK_URL = config.get('discord', 'webhook_url')
DISCORD_LOGGER_LEVEL = config.get('discord', 'logger_level')


def initialise_app(
    logger_level: str = LOGGER_LEVEL,
    discord_service_name: str = DISCORD_SERVICE_NAME,
    discord_webhook_url: str = DISCORD_WEBHOOK_URL,
    discord_logger_level: str = DISCORD_LOGGER_LEVEL
) -> int:
    """
    Convienience function that ensures eveything is ready
    before running the main loop.
    """
    # load environment variables
    load_dotenv()
    user_id = int(os.getenv('USER_ID', default=None))
    assert user_id is not None, 'environment variable USER_ID must be specified'
    logger_level = os.getenv(
        'LOGGER_LEVEL',
        default=LOGGER_LEVEL
    )
    discord_service_name = os.getenv(
        'DISCORD_SERVICE_NAME',
        default=DISCORD_SERVICE_NAME
    )
    discord_webhook_url = os.getenv(
        'DISCORD_WEBHOOK_URL',
        default=DISCORD_WEBHOOK_URL
    )
    discord_logger_level = os.getenv(
        'DISCORD_LOGGER_LEVEL',
        default=DISCORD_LOGGER_LEVEL
    )
    # setup logging
    fmt = '|%(asctime)s| %(levelname)s %(filename)s:%(funcName)s:%(message)s'
    datefmt = '%Y-%m-%d %H:%M:%S'
    level = getattr(logging, logger_level.upper())
    logging.basicConfig(format=fmt, datefmt=datefmt, level=level)
    # setup logging to discord
    logger = logging.getLogger()
    discord_handler = DiscordHandler(
        service_name=discord_service_name,
        webhook_url=discord_webhook_url,
    )
    discord_handler.setFormatter(logging.Formatter('%(message)s'))
    level = getattr(logging, discord_logger_level.upper())
    discord_handler.setLevel(level=level)
    logger.addHandler(discord_handler)
    logging.debug('finished')
    return user_id


if __name__ == '__main__':
    user_id = initialise_app()
    logging.warning('test message')