import datetime
from mutagen.id3._specs import ID3TimeStamp


def convert_id3_timestamp_to_datetime(timestamp):
    """Turns a mutagen ID3TimeStamp into a format that SQLite can use for Date field"""
    if timestamp is None:
        return
    if not isinstance(timestamp, ID3TimeStamp):
        return
    if len(timestamp.text) == 4:  # If only year is provided
        datetime_obj = datetime.datetime.strptime(timestamp.text, "%Y")
    else:
        try:
            datetime_obj = datetime.datetime.strptime(timestamp.text, "%Y-%m-%d")
        except ValueError:
            datetime_obj = datetime.datetime.strptime(timestamp.text, "%Y%m%d")
    return datetime_obj.strftime("%Y-%m-%d")