"""DynamoDB Client Utils."""

from owsrequest.constants import environment


def dynamodb_opts(env):
    """Prepare options for dynamodb.

    Args:
        env (dict): environment variables
    """
    # If DEV_DYNAMODB_ENDPOINT_URL is set, use local one. For development only.
    dev_endpoint_url = env.get(environment.DEV_DYNAMO_ENDPOINT_URL)
    if dev_endpoint_url:
        return {
            'endpoint_url':
                dev_endpoint_url,
            'aws_access_key_id':
                env[environment.DEV_DYNAMO_ACCESS_KEY_ID],
            'aws_secret_access_key':
                env[environment.DEV_DYNAMO_SECRET_ACCESS_KEY],
            'region_name':
                env.get(environment.DEV_DYNAMO_REGION, 'us-east-1')
        }

    return {'region_name': 'us-east-1'}