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)

    universes = {}
    used_universes = {}
    for universe, uconfig in config.get("universes", {}).items():
        universes[universe] = ConfigWrapper(
            alert_brightness=max(int(uconfig.get("alert_brightness", 255)), 10),
            filters=uconfig.get("filters", []),
            lights=uconfig.get("lights", {}),
            multicast=bool(uconfig.get("multicast", False) is True),
            rainbow_brightness=int(uconfig.get("rainbow_brightness", 150)),
            target=uconfig.get("target", "127.0.0.1"),
            universe=int(uconfig.get("universe", 1)),
        )
        if universes[universe].universe in used_universes:
            LOG.warning(
                f"universe {universes[universe].universe} used by both {universe} and {used_universes[universes[universe]].universe}"
            )

    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"),
        ),
        universes=universes,
    )

    return conf