"""S3 connector."""

from tempfile import NamedTemporaryFile

import boto3

s3_client = boto3.client('s3')


def download_file(account_id, bucket_name, file_path):
    """Download file from specified s3 bucket."""
    file = NamedTemporaryFile(suffix='.xlsx', delete=False)
    s3_client.download_file(
        bucket_name, file_path, file.name, ExtraArgs={'ExpectedBucketOwner': account_id}
    )
    return file.name