"""Utility fuctions."""


def _logger():
    from loguru import logger as _loguru_logger
    from hyperglass.constants import LOG_HANDLER
    from hyperglass.constants import LOG_LEVELS

    _loguru_logger.remove()
    _loguru_logger.configure(handlers=[LOG_HANDLER], levels=LOG_LEVELS)
    return _loguru_logger


def cpu_count():
    """Get server's CPU core count.

    Used for number of web server workers.

    Returns:
        {int} -- CPU Cores
    """
    import multiprocessing

    return multiprocessing.cpu_count()


def check_python():
    """Verify Python Version.

    Raises:
        RuntimeError: Raised if running Python version is invalid.

    Returns:
        {str} -- Python version
    """
    import sys
    from hyperglass.constants import MIN_PYTHON_VERSION

    pretty_version = ".".join(tuple(str(v) for v in MIN_PYTHON_VERSION))
    if sys.version_info < MIN_PYTHON_VERSION:
        raise RuntimeError(f"Python {pretty_version}+ is required.")
    return pretty_version


log = _logger()