"""Connector for AWS S3."""

import boto3


def create_presigned_url(bucket: str, key: str, expiration: int = 30) -> str:
    """Generate a temporary presigned url.

    Args:
        bucket (str): Name of s3 bucket.
        key (str): Name of existing s3 object key.
        expiration (int): Number of seconds the url is valid. Defaults to 30 seconds.
    Returns:
        str: Presigned url.
    """
    client = boto3.client('s3')

    return client.generate_presigned_url(
        ClientMethod='get_object',
        ExpiresIn=expiration,
        Params={
            'Bucket': bucket,
            'Key': key
        },
    )