"""This module is responsible for extraction information about audio files."""

from common_config import logger  # noqa
from constants import transcoding_types  # noqa


def _get_codec_for_mutagen_object(mutagen_descriptor, mime_type):
    """Get codec from mutagen.flac.Flac or mutagen.m4a.M4a.

    Args:
       mutagen_descriptor (mutagen.File): Audio file descriptor.
       mime_type (str): Mime type of file object.
    Returns:
       str: flac, alac or throw ValueError
    Raises:
       AttributeError: Unexpected mutagen descriptor object.

    """
    try:
        codec = ''
        if mime_type in transcoding_types.FLAC_MIME_TYPES:
            codec = transcoding_types.FLAC_CODEC_NAME
        elif mime_type in transcoding_types.MP4_MIME_TYPES:
            codec = mutagen_descriptor.info.codec
        return codec
    except AttributeError as e:
        logger.exception(str(e))
        raise