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')


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

    # validate options exist.
    for section, option in (
        ('mqtt', 'host'),
        ('mqtt', 'topic'),
        ('sacn', 'multicast'),
        ('alerts', 'brightness'),
        ('rainbow', 'enable'),
        ('rainbow', 'intensity'),
        ('rainbow', 'brightness'),
        ('rainbow', 'speed'),
    ):
        if config.get(section, {}).get(option) is None:
            LOG.error(
                f'configuration option "{section}" "{option}" is missing in config'
            )
            exit(1)

    # dmx values
    for section, option in (
        ('alerts', 'brightness'),
        ('rainbow', 'intensity'),
        ('rainbow', 'brightness'),
    ):
        if int(config[section][option]) < 10:
            LOG.error(f'value of "{section}" "{option}" must be atleast 10')
            exit(1)

    return config