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"""This module contains the AWS DynamoDB hook"""
from typing import Iterable, List, Optional

from airflow.exceptions import AirflowException
from airflow.providers.amazon.aws.hooks.base_aws import AwsBaseHook


class AwsDynamoDBHook(AwsBaseHook):
    """
    Interact with AWS DynamoDB.

    Additional arguments (such as ``aws_conn_id``) may be specified and
    are passed down to the underlying AwsBaseHook.

    .. seealso::
        :class:`~airflow.providers.amazon.aws.hooks.base_aws.AwsBaseHook`

    :param table_keys: partition key and sort key
    :type table_keys: list
    :param table_name: target DynamoDB table
    :type table_name: str
    """

    def __init__(
        self,
        *args,
        table_keys: Optional[List] = None,
        table_name: Optional[str] = None,
        **kwargs,
    ) -> None:
        self.table_keys = table_keys
        self.table_name = table_name
        kwargs["resource_type"] = "dynamodb"
        super().__init__(*args, **kwargs)

    def write_batch_data(self, items: Iterable) -> bool:
        """Write batch items to DynamoDB table with provisioned throughout capacity."""
        try:
            table = self.get_conn().Table(self.table_name)

            with table.batch_writer(overwrite_by_pkeys=self.table_keys) as batch:
                for item in items:
                    batch.put_item(Item=item)
            return True
        except Exception as general_error:
            raise AirflowException(
                f"Failed to insert items in dynamodb, error: {str(general_error)}"
            )