text: # -*- coding: utf-8 -*-
  # Copyright 2020 Google LLC
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  #
  import warnings
  from typing import Callable, Dict, Optional, Sequence, Tuple, Union
  
  from google.api_core import grpc_helpers
  from google.api_core import operations_v1
  from google.api_core import gapic_v1
  import google.auth  # type: ignore
  from google.auth import credentials as ga_credentials  # type: ignore
  from google.auth.transport.grpc import SslCredentials  # type: ignore
  
  import grpc  # type: ignore
  
  from google.cloud.dialogflowcx_v3beta1.types import flow
  from google.cloud.dialogflowcx_v3beta1.types import flow as gcdc_flow
  from google.longrunning import operations_pb2  # type: ignore
  from google.protobuf import empty_pb2  # type: ignore
  from .base import FlowsTransport, DEFAULT_CLIENT_INFO
  
  
  class FlowsGrpcTransport(FlowsTransport):
      """gRPC backend transport for Flows.
  
      Service for managing
      [Flows][google.cloud.dialogflow.cx.v3beta1.Flow].
  
      This class defines the same methods as the primary client, so the
      primary client can load the underlying transport implementation
      and call it.
  
      It sends protocol buffers over the wire using gRPC (which is built on
      top of HTTP/2); the ``grpcio`` package must be installed.
      """
  
      _stubs: Dict[str, Callable]
  
      def __init__(
          self,
          *,
          host: str = "dialogflow.googleapis.com",
          credentials: ga_credentials.Credentials = None,
          credentials_file: str = None,
          scopes: Sequence[str] = None,
          channel: grpc.Channel = None,
          api_mtls_endpoint: str = None,
          client_cert_source: Callable[[], Tuple[bytes, bytes]] = None,
          ssl_channel_credentials: grpc.ChannelCredentials = None,
          client_cert_source_for_mtls: Callable[[], Tuple[bytes, bytes]] = None,
          quota_project_id: Optional[str] = None,
          client_info: gapic_v1.client_info.ClientInfo = DEFAULT_CLIENT_INFO,
          always_use_jwt_access: Optional[bool] = False,
      ) -> None:
          """Instantiate the transport.
  
          Args:
              host (Optional[str]):
                   The hostname to connect to.
              credentials (Optional[google.auth.credentials.Credentials]): The
                  authorization credentials to attach to requests. These
                  credentials identify the application to the service; if none
                  are specified, the client will attempt to ascertain the
                  credentials from the environment.
                  This argument is ignored if ``channel`` is provided.
              credentials_file (Optional[str]): A file with credentials that can
                  be loaded with :func:`google.auth.load_credentials_from_file`.
                  This argument is ignored if ``channel`` is provided.
              scopes (Optional(Sequence[str])): A list of scopes. This argument is
                  ignored if ``channel`` is provided.
              channel (Optional[grpc.Channel]): A ``Channel`` instance through
                  which to make calls.
              api_mtls_endpoint (Optional[str]): Deprecated. The mutual TLS endpoint.
                  If provided, it overrides the ``host`` argument and tries to create
                  a mutual TLS channel with client SSL credentials from
                  ``client_cert_source`` or application default SSL credentials.
              client_cert_source (Optional[Callable[[], Tuple[bytes, bytes]]]):
                  Deprecated. A callback to provide client SSL certificate bytes and
                  private key bytes, both in PEM format. It is ignored if
                  ``api_mtls_endpoint`` is None.
              ssl_channel_credentials (grpc.ChannelCredentials): SSL credentials
                  for the grpc channel. It is ignored if ``channel`` is provided.
              client_cert_source_for_mtls (Optional[Callable[[], Tuple[bytes, bytes]]]):
                  A callback to provide client certificate bytes and private key bytes,
                  both in PEM format. It is used to configure a mutual TLS channel. It is
                  ignored if ``channel`` or ``ssl_channel_credentials`` is provided.
              quota_project_id (Optional[str]): An optional project to use for billing
                  and quota.
              client_info (google.api_core.gapic_v1.client_info.ClientInfo):
                  The client info used to send a user-agent string along with
                  API requests. If ``None``, then default info will be used.
                  Generally, you only need to set this if you're developing
                  your own client library.
              always_use_jwt_access (Optional[bool]): Whether self signed JWT should
                  be used for service account credentials.
  
          Raises:
            google.auth.exceptions.MutualTLSChannelError: If mutual TLS transport
                creation failed for any reason.
            google.api_core.exceptions.DuplicateCredentialArgs: If both ``credentials``
                and ``credentials_file`` are passed.
          """
          self._grpc_channel = None
          self._ssl_channel_credentials = ssl_channel_credentials
          self._stubs: Dict[str, Callable] = {}
          self._operations_client: Optional[operations_v1.OperationsClient] = None
  
          if api_mtls_endpoint:
              warnings.warn("api_mtls_endpoint is deprecated", DeprecationWarning)
          if client_cert_source:
              warnings.warn("client_cert_source is deprecated", DeprecationWarning)
  
          if channel:
              # Ignore credentials if a channel was passed.
              credentials = False
              # If a channel was explicitly provided, set it.
              self._grpc_channel = channel
              self._ssl_channel_credentials = None
  
          else:
              if api_mtls_endpoint:
                  host = api_mtls_endpoint
  
                  # Create SSL credentials with client_cert_source or application
                  # default SSL credentials.
                  if client_cert_source:
                      cert, key = client_cert_source()
                      self._ssl_channel_credentials = grpc.ssl_channel_credentials(
                          certificate_chain=cert, private_key=key
                      )
                  else:
                      self._ssl_channel_credentials = SslCredentials().ssl_credentials
  
              else:
                  if client_cert_source_for_mtls and not ssl_channel_credentials:
                      cert, key = client_cert_source_for_mtls()
                      self._ssl_channel_credentials = grpc.ssl_channel_credentials(
                          certificate_chain=cert, private_key=key
                      )
  
          # The base transport sets the host, credentials and scopes
          super().__init__(
              host=host,
              credentials=credentials,
              credentials_file=credentials_file,
              scopes=scopes,
              quota_project_id=quota_project_id,
              client_info=client_info,
              always_use_jwt_access=always_use_jwt_access,
          )
  
          if not self._grpc_channel:
              self._grpc_channel = type(self).create_channel(
                  self._host,
                  # use the credentials which are saved
                  credentials=self._credentials,
                  # Set ``credentials_file`` to ``None`` here as
                  # the credentials that we saved earlier should be used.
                  credentials_file=None,
                  scopes=self._scopes,
                  ssl_credentials=self._ssl_channel_credentials,
                  quota_project_id=quota_project_id,
                  options=[
                      ("grpc.max_send_message_length", -1),
                      ("grpc.max_receive_message_length", -1),
                  ],
              )
  
          # Wrap messages. This must be done after self._grpc_channel exists
          self._prep_wrapped_messages(client_info)
  
      @classmethod
      def create_channel(
          cls,
          host: str = "dialogflow.googleapis.com",
          credentials: ga_credentials.Credentials = None,
          credentials_file: str = None,
          scopes: Optional[Sequence[str]] = None,
          quota_project_id: Optional[str] = None,
          **kwargs,
      ) -> grpc.Channel:
          """Create and return a gRPC channel object.
          Args:
              host (Optional[str]): The host for the channel to use.
              credentials (Optional[~.Credentials]): The
                  authorization credentials to attach to requests. These
                  credentials identify this application to the service. If
                  none are specified, the client will attempt to ascertain
                  the credentials from the environment.
              credentials_file (Optional[str]): A file with credentials that can
                  be loaded with :func:`google.auth.load_credentials_from_file`.
                  This argument is mutually exclusive with credentials.
              scopes (Optional[Sequence[str]]): A optional list of scopes needed for this
                  service. These are only used when credentials are not specified and
                  are passed to :func:`google.auth.default`.
              quota_project_id (Optional[str]): An optional project to use for billing
                  and quota.
              kwargs (Optional[dict]): Keyword arguments, which are passed to the
                  channel creation.
          Returns:
              grpc.Channel: A gRPC channel object.
  
          Raises:
              google.api_core.exceptions.DuplicateCredentialArgs: If both ``credentials``
                and ``credentials_file`` are passed.
          """
  
          return grpc_helpers.create_channel(
              host,
              credentials=credentials,
              credentials_file=credentials_file,
              quota_project_id=quota_project_id,
              default_scopes=cls.AUTH_SCOPES,
              scopes=scopes,
              default_host=cls.DEFAULT_HOST,
              **kwargs,
          )
  
      @property
      def grpc_channel(self) -> grpc.Channel:
          """Return the channel designed to connect to this service.
          """
          return self._grpc_channel
  
      @property
      def operations_client(self) -> operations_v1.OperationsClient:
          """Create the client designed to process long-running operations.
  
          This property caches on the instance; repeated calls return the same
          client.
          """
          # Quick check: Only create a new client if we do not already have one.
          if self._operations_client is None:
              self._operations_client = operations_v1.OperationsClient(self.grpc_channel)
  
          # Return the client from cache.
          return self._operations_client
  
      @property
      def create_flow(self) -> Callable[[gcdc_flow.CreateFlowRequest], gcdc_flow.Flow]:
          r"""Return a callable for the create flow method over gRPC.
  
          Creates a flow in the specified agent.
  
          Note: You should always train a flow prior to sending it
          queries. See the `training
          documentation <https://cloud.google.com/dialogflow/cx/docs/concept/training>`__.
  
          Returns:
              Callable[[~.CreateFlowRequest],
                      ~.Flow]:
                  A function that, when called, will call the underlying RPC
                  on the server.
          """
          # Generate a "stub function" on-the-fly which will actually make
          # the request.
          # gRPC handles serialization and deserialization, so we just need
          # to pass in the functions for each.
          if "create_flow" not in self._stubs:
              self._stubs["create_flow"] = self.grpc_channel.unary_unary(
                  "/google.cloud.dialogflow.cx.v3beta1.Flows/CreateFlow",
                  request_serializer=gcdc_flow.CreateFlowRequest.serialize,
                  response_deserializer=gcdc_flow.Flow.deserialize,
              )
          return self._stubs["create_flow"]
  
      @property
      def delete_flow(self) -> Callable[[flow.DeleteFlowRequest], empty_pb2.Empty]:
          r"""Return a callable for the delete flow method over gRPC.
  
          Deletes a specified flow.
  
          Returns:
              Callable[[~.DeleteFlowRequest],
                      ~.Empty]:
                  A function that, when called, will call the underlying RPC
                  on the server.
          """
          # Generate a "stub function" on-the-fly which will actually make
          # the request.
          # gRPC handles serialization and deserialization, so we just need
          # to pass in the functions for each.
          if "delete_flow" not in self._stubs:
              self._stubs["delete_flow"] = self.grpc_channel.unary_unary(
                  "/google.cloud.dialogflow.cx.v3beta1.Flows/DeleteFlow",
                  request_serializer=flow.DeleteFlowRequest.serialize,
                  response_deserializer=empty_pb2.Empty.FromString,
              )
          return self._stubs["delete_flow"]
  
      @property
      def list_flows(self) -> Callable[[flow.ListFlowsRequest], flow.ListFlowsResponse]:
          r"""Return a callable for the list flows method over gRPC.
  
          Returns the list of all flows in the specified agent.
  
          Returns:
              Callable[[~.ListFlowsRequest],
                      ~.ListFlowsResponse]:
                  A function that, when called, will call the underlying RPC
                  on the server.
          """
          # Generate a "stub function" on-the-fly which will actually make
          # the request.
          # gRPC handles serialization and deserialization, so we just need
          # to pass in the functions for each.
          if "list_flows" not in self._stubs:
              self._stubs["list_flows"] = self.grpc_channel.unary_unary(
                  "/google.cloud.dialogflow.cx.v3beta1.Flows/ListFlows",
                  request_serializer=flow.ListFlowsRequest.serialize,
                  response_deserializer=flow.ListFlowsResponse.deserialize,
              )
          return self._stubs["list_flows"]
  
      @property
      def get_flow(self) -> Callable[[flow.GetFlowRequest], flow.Flow]:
          r"""Return a callable for the get flow method over gRPC.
  
          Retrieves the specified flow.
  
          Returns:
              Callable[[~.GetFlowRequest],
                      ~.Flow]:
                  A function that, when called, will call the underlying RPC
                  on the server.
          """
          # Generate a "stub function" on-the-fly which will actually make
          # the request.
          # gRPC handles serialization and deserialization, so we just need
          # to pass in the functions for each.
          if "get_flow" not in self._stubs:
              self._stubs["get_flow"] = self.grpc_channel.unary_unary(
                  "/google.cloud.dialogflow.cx.v3beta1.Flows/GetFlow",
                  request_serializer=flow.GetFlowRequest.serialize,
                  response_deserializer=flow.Flow.deserialize,
              )
          return self._stubs["get_flow"]
  
      @property
      def update_flow(self) -> Callable[[gcdc_flow.UpdateFlowRequest], gcdc_flow.Flow]:
          r"""Return a callable for the update flow method over gRPC.
  
          Updates the specified flow.
  
          Note: You should always train a flow prior to sending it
          queries. See the `training
          documentation <https://cloud.google.com/dialogflow/cx/docs/concept/training>`__.
  
          Returns:
              Callable[[~.UpdateFlowRequest],
                      ~.Flow]:
                  A function that, when called, will call the underlying RPC
                  on the server.
          """
          # Generate a "stub function" on-the-fly which will actually make
          # the request.
          # gRPC handles serialization and deserialization, so we just need
          # to pass in the functions for each.
          if "update_flow" not in self._stubs:
              self._stubs["update_flow"] = self.grpc_channel.unary_unary(
                  "/google.cloud.dialogflow.cx.v3beta1.Flows/UpdateFlow",
                  request_serializer=gcdc_flow.UpdateFlowRequest.serialize,
                  response_deserializer=gcdc_flow.Flow.deserialize,
              )
          return self._stubs["update_flow"]
  
      @property
      def train_flow(self) -> Callable[[flow.TrainFlowRequest], operations_pb2.Operation]:
          r"""Return a callable for the train flow method over gRPC.
  
          Trains the specified flow. Note that only the flow in 'draft'
          environment is trained.
  
          This method is a `long-running
          operation <https://cloud.google.com/dialogflow/cx/docs/how/long-running-operation>`__.
          The returned ``Operation`` type has the following
          method-specific fields:
  
          -  ``metadata``: An empty `Struct
             message <https://developers.google.com/protocol-buffers/docs/reference/google.protobuf#struct>`__
          -  ``response``: An `Empty
             message <https://developers.google.com/protocol-buffers/docs/reference/google.protobuf#empty>`__
  
          Note: You should always train a flow prior to sending it
          queries. See the `training
          documentation <https://cloud.google.com/dialogflow/cx/docs/concept/training>`__.
  
          Returns:
              Callable[[~.TrainFlowRequest],
                      ~.Operation]:
                  A function that, when called, will call the underlying RPC
                  on the server.
          """
          # Generate a "stub function" on-the-fly which will actually make
          # the request.
          # gRPC handles serialization and deserialization, so we just need
          # to pass in the functions for each.
          if "train_flow" not in self._stubs:
              self._stubs["train_flow"] = self.grpc_channel.unary_unary(
                  "/google.cloud.dialogflow.cx.v3beta1.Flows/TrainFlow",
                  request_serializer=flow.TrainFlowRequest.serialize,
                  response_deserializer=operations_pb2.Operation.FromString,
              )
          return self._stubs["train_flow"]
  
      @property
      def validate_flow(
          self,
      ) -> Callable[[flow.ValidateFlowRequest], flow.FlowValidationResult]:
          r"""Return a callable for the validate flow method over gRPC.
  
          Validates the specified flow and creates or updates
          validation results. Please call this API after the
          training is completed to get the complete validation
          results.
  
          Returns:
              Callable[[~.ValidateFlowRequest],
                      ~.FlowValidationResult]:
                  A function that, when called, will call the underlying RPC
                  on the server.
          """
          # Generate a "stub function" on-the-fly which will actually make
          # the request.
          # gRPC handles serialization and deserialization, so we just need
          # to pass in the functions for each.
          if "validate_flow" not in self._stubs:
              self._stubs["validate_flow"] = self.grpc_channel.unary_unary(
                  "/google.cloud.dialogflow.cx.v3beta1.Flows/ValidateFlow",
                  request_serializer=flow.ValidateFlowRequest.serialize,
                  response_deserializer=flow.FlowValidationResult.deserialize,
              )
          return self._stubs["validate_flow"]
  
      @property
      def get_flow_validation_result(
          self,
      ) -> Callable[[flow.GetFlowValidationResultRequest], flow.FlowValidationResult]:
          r"""Return a callable for the get flow validation result method over gRPC.
  
          Gets the latest flow validation result. Flow
          validation is performed when ValidateFlow is called.
  
          Returns:
              Callable[[~.GetFlowValidationResultRequest],
                      ~.FlowValidationResult]:
                  A function that, when called, will call the underlying RPC
                  on the server.
          """
          # Generate a "stub function" on-the-fly which will actually make
          # the request.
          # gRPC handles serialization and deserialization, so we just need
          # to pass in the functions for each.
          if "get_flow_validation_result" not in self._stubs:
              self._stubs["get_flow_validation_result"] = self.grpc_channel.unary_unary(
                  "/google.cloud.dialogflow.cx.v3beta1.Flows/GetFlowValidationResult",
                  request_serializer=flow.GetFlowValidationResultRequest.serialize,
                  response_deserializer=flow.FlowValidationResult.deserialize,
              )
          return self._stubs["get_flow_validation_result"]
  
      @property
      def import_flow(
          self,
      ) -> Callable[[flow.ImportFlowRequest], operations_pb2.Operation]:
          r"""Return a callable for the import flow method over gRPC.
  
          Imports the specified flow to the specified agent from a binary
          file.
  
          This method is a `long-running
          operation <https://cloud.google.com/dialogflow/cx/docs/how/long-running-operation>`__.
          The returned ``Operation`` type has the following
          method-specific fields:
  
          -  ``metadata``: An empty `Struct
             message <https://developers.google.com/protocol-buffers/docs/reference/google.protobuf#struct>`__
          -  ``response``:
             [ImportFlowResponse][google.cloud.dialogflow.cx.v3beta1.ImportFlowResponse]
  
          Note: You should always train a flow prior to sending it
          queries. See the `training
          documentation <https://cloud.google.com/dialogflow/cx/docs/concept/training>`__.
  
          Returns:
              Callable[[~.ImportFlowRequest],
                      ~.Operation]:
                  A function that, when called, will call the underlying RPC
                  on the server.
          """
          # Generate a "stub function" on-the-fly which will actually make
          # the request.
          # gRPC handles serialization and deserialization, so we just need
          # to pass in the functions for each.
          if "import_flow" not in self._stubs:
              self._stubs["import_flow"] = self.grpc_channel.unary_unary(
                  "/google.cloud.dialogflow.cx.v3beta1.Flows/ImportFlow",
                  request_serializer=flow.ImportFlowRequest.serialize,
                  response_deserializer=operations_pb2.Operation.FromString,
              )
          return self._stubs["import_flow"]
  
      @property
      def export_flow(
          self,
      ) -> Callable[[flow.ExportFlowRequest], operations_pb2.Operation]:
          r"""Return a callable for the export flow method over gRPC.
  
          Exports the specified flow to a binary file.
  
          This method is a `long-running
          operation <https://cloud.google.com/dialogflow/cx/docs/how/long-running-operation>`__.
          The returned ``Operation`` type has the following
          method-specific fields:
  
          -  ``metadata``: An empty `Struct
             message <https://developers.google.com/protocol-buffers/docs/reference/google.protobuf#struct>`__
          -  ``response``:
             [ExportFlowResponse][google.cloud.dialogflow.cx.v3beta1.ExportFlowResponse]
  
          Note that resources (e.g. intents, entities, webhooks) that the
          flow references will also be exported.
  
          Returns:
              Callable[[~.ExportFlowRequest],
                      ~.Operation]:
                  A function that, when called, will call the underlying RPC
                  on the server.
          """
          # Generate a "stub function" on-the-fly which will actually make
          # the request.
          # gRPC handles serialization and deserialization, so we just need
          # to pass in the functions for each.
          if "export_flow" not in self._stubs:
              self._stubs["export_flow"] = self.grpc_channel.unary_unary(
                  "/google.cloud.dialogflow.cx.v3beta1.Flows/ExportFlow",
                  request_serializer=flow.ExportFlowRequest.serialize,
                  response_deserializer=operations_pb2.Operation.FromString,
              )
          return self._stubs["export_flow"]
  
      def close(self):
          self.grpc_channel.close()
  
  
  __all__ = ("FlowsGrpcTransport",)
  