"""Definition of get function."""
from __future__ import annotations

import os
from io import BytesIO

from minio import Minio


def get(
    client: Minio,
    object_name: str,
) -> BytesIO:
    """Get buffer from bucket in MinIO."""
    assert isinstance(client, Minio)
    assert isinstance(object_name, str)
    bucket_name = os.getenv('MINIO_BUCKET_NAME', default=None)
    assert isinstance(bucket_name, str)
    # get buffer
    try:
        response = client.get_object(bucket_name, object_name)
        buffer = BytesIO(response.data)
    finally:
        response.close()
        response.release_conn()
    buffer.seek(0)
    return buffer