import logging
import os

import yaml

LOG = logging.getLogger(__name__)
CONFIG_NAME = 'cis-collector.yml'
CONFIG_LOCATIONS = [
    '/etc/{conf}'.format(conf=CONFIG_NAME),
    '{home}/{conf}'.format(home=os.environ.get('HOME'), conf=CONFIG_NAME),
    '{cwd}/{conf}'.format(cwd=os.getcwd(), conf=CONFIG_NAME),
]


def read_config(paths):
    """Read configuration from all relevant config files."""
    current_config = dict()
    for config_path in paths:
        try:
            with open(config_path) as config:
                current_config.update(yaml.safe_load(config))
        except FileNotFoundError:
            LOG.debug('No config file at %s, skipping...', config_path)

        LOG.info('Loaded config from %s', config_path)

    return current_config


CONFIG = read_config(CONFIG_LOCATIONS)