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from airflow.providers.microsoft.azure.hooks.azure_cosmos import AzureCosmosDBHook
from airflow.sensors.base import BaseSensorOperator
from airflow.utils.decorators import apply_defaults


class AzureCosmosDocumentSensor(BaseSensorOperator):
    """
    Checks for the existence of a document which
    matches the given query in CosmosDB. Example:

    >>> azure_cosmos_sensor = AzureCosmosDocumentSensor(database_name="somedatabase_name",
    ...                            collection_name="somecollection_name",
    ...                            document_id="unique-doc-id",
    ...                            azure_cosmos_conn_id="azure_cosmos_default",
    ...                            task_id="azure_cosmos_sensor")

    :param database_name: Target CosmosDB database_name.
    :type database_name: str
    :param collection_name: Target CosmosDB collection_name.
    :type collection_name: str
    :param document_id: The ID of the target document.
    :type query: str
    :param azure_cosmos_conn_id: Reference to the Azure CosmosDB connection.
    :type azure_cosmos_conn_id: str
    """

    template_fields = ("database_name", "collection_name", "document_id")

    @apply_defaults
    def __init__(
        self,
        *,
        database_name: str,
        collection_name: str,
        document_id: str,
        azure_cosmos_conn_id: str = "azure_cosmos_default",
        **kwargs,
    ) -> None:
        super().__init__(**kwargs)
        self.azure_cosmos_conn_id = azure_cosmos_conn_id
        self.database_name = database_name
        self.collection_name = collection_name
        self.document_id = document_id

    def poke(self, context: dict) -> bool:
        self.log.info("*** Intering poke")
        hook = AzureCosmosDBHook(self.azure_cosmos_conn_id)
        return (
            hook.get_document(
                self.document_id, self.database_name, self.collection_name
            )
            is not None
        )