try:
    # python 3.11
    from tomllib import loads as toml_load
except ImportError:
    from rtoml import load as toml_load

import logging
from sys import exit

LOG = logging.getLogger('Config')


class ConfigWrapper:
    # simple class to wrap a dict into a object
    def __init__(self, **kwargs):
        for k, v in kwargs.items():
            setattr(self, k, v)


def load_and_validate_config(path):
    try:
        with open(path, 'r') as cf:
            config = toml_load(cf.read())
    except Exception as e:
        LOG.exception(f'{path} is no valid toml configuration file')
        exit(1)

    if not config.get('mqtt', {}).get('host'):
        LOG.error(
            f'configuration option "mqtt" "host" is missing in config, but required to exist'
        )
        exit(1)

    conf = ConfigWrapper(
        mqtt=ConfigWrapper(
            host=config['mqtt']['host'],
            user=config['mqtt'].get('user'),
            password=config['mqtt'].get('password'),
            topic=config['mqtt'].get('topic', '/voc/alert'),
        ),
        sacn=ConfigWrapper(
            multicast=bool(config.get('sacn', {}).get('multicast', False) is True),
            target=config.get('sacn', {}).get('target', '127.0.0.1'),
            universe=int(config.get('sacn', {}).get('universe', 1)),
        ),
        alerts=ConfigWrapper(
            brightness=max(int(config.get('alerts', {}).get('brightness', 255)), 10),
            filters=sorted(config.get('alerts', {}).get('filters', set())),
        ),
        rainbow=ConfigWrapper(
            enable=bool(config.get('rainbow', {}).get('enable', True) is True),
            intensity=max(int(config.get('rainbow', {}).get('intensity', 100)), 10),
            brightness=max(int(config.get('rainbow', {}).get('brightness', 150)), 10),
            speed=int(config.get('rainbow', {}).get('speed', 25)),
        ),
        lights=config.get('lights', {}),
    )

    if conf.alerts.brightness < conf.rainbow.brightness:
        LOG.error('alerts brightness must be equal or above rainbow brightness')
        exit(1)

    return conf