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from aws_lambda_powertools import Logger

LOG: Logger = Logger(service=__name__)


def build_point_in_time_recovery_template(dynamodb_client: object, source_table_name: str = ""):
    """Build a CFN template for the PITR settings for the DynamoDB table.

    Args:
        dynamodb_client: Authenticated DynamoDB boto3 client.
        source_table_name: The name of the source table.

    Returns:
      A dictionary representing CFN yaml for the PITR settings of a DynamoDB table

    Raises:
    """
    response = dynamodb_client.describe_continuous_backups(TableName=source_table_name)
    pitr_status = (
        response.get("ContinuousBackupsDescription")
        .get("PointInTimeRecoveryDescription")
        .get("PointInTimeRecoveryStatus")
    )
    pitr_specification = {"PointInTimeRecoveryEnabled": pitr_status == "ENABLED"}
    LOG.info(f"PITR settings: {pitr_specification}")
    return pitr_specification