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 Awaitable, Callable, Dict, Optional, Sequence, Tuple, Union
  
  from google.api_core import gapic_v1  # type: ignore
  from google.api_core import grpc_helpers_async  # type: ignore
  from google.auth import credentials as ga_credentials  # type: ignore
  from google.auth.transport.grpc import SslCredentials  # type: ignore
  import packaging.version
  
  import grpc  # type: ignore
  from grpc.experimental import aio  # type: ignore
  
  from google.cloud.dialogflow_v2.types import version
  from google.cloud.dialogflow_v2.types import version as gcd_version
  from google.protobuf import empty_pb2  # type: ignore
  from .base import VersionsTransport, DEFAULT_CLIENT_INFO
  from .grpc import VersionsGrpcTransport
  
  
  class VersionsGrpcAsyncIOTransport(VersionsTransport):
      """gRPC AsyncIO backend transport for Versions.
  
      Service for managing [Versions][google.cloud.dialogflow.v2.Version].
  
      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.
      """
  
      _grpc_channel: aio.Channel
      _stubs: Dict[str, Callable] = {}
  
      @classmethod
      def create_channel(
          cls,
          host: str = "dialogflow.googleapis.com",
          credentials: ga_credentials.Credentials = None,
          credentials_file: Optional[str] = None,
          scopes: Optional[Sequence[str]] = None,
          quota_project_id: Optional[str] = None,
          **kwargs,
      ) -> aio.Channel:
          """Create and return a gRPC AsyncIO 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 ignored if ``channel`` is provided.
              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:
              aio.Channel: A gRPC AsyncIO channel object.
          """
  
          return grpc_helpers_async.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,
          )
  
      def __init__(
          self,
          *,
          host: str = "dialogflow.googleapis.com",
          credentials: ga_credentials.Credentials = None,
          credentials_file: Optional[str] = None,
          scopes: Optional[Sequence[str]] = None,
          channel: aio.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=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 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`.
              channel (Optional[aio.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] = {}
  
          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,
                  credentials=self._credentials,
                  credentials_file=credentials_file,
                  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)
  
      @property
      def grpc_channel(self) -> aio.Channel:
          """Create the channel designed to connect to this service.
  
          This property caches on the instance; repeated calls return
          the same channel.
          """
          # Return the channel from cache.
          return self._grpc_channel
  
      @property
      def list_versions(
          self,
      ) -> Callable[
          [version.ListVersionsRequest], Awaitable[version.ListVersionsResponse]
      ]:
          r"""Return a callable for the list versions method over gRPC.
  
          Returns the list of all versions of the specified
          agent.
  
          Returns:
              Callable[[~.ListVersionsRequest],
                      Awaitable[~.ListVersionsResponse]]:
                  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_versions" not in self._stubs:
              self._stubs["list_versions"] = self.grpc_channel.unary_unary(
                  "/google.cloud.dialogflow.v2.Versions/ListVersions",
                  request_serializer=version.ListVersionsRequest.serialize,
                  response_deserializer=version.ListVersionsResponse.deserialize,
              )
          return self._stubs["list_versions"]
  
      @property
      def get_version(
          self,
      ) -> Callable[[version.GetVersionRequest], Awaitable[version.Version]]:
          r"""Return a callable for the get version method over gRPC.
  
          Retrieves the specified agent version.
  
          Returns:
              Callable[[~.GetVersionRequest],
                      Awaitable[~.Version]]:
                  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_version" not in self._stubs:
              self._stubs["get_version"] = self.grpc_channel.unary_unary(
                  "/google.cloud.dialogflow.v2.Versions/GetVersion",
                  request_serializer=version.GetVersionRequest.serialize,
                  response_deserializer=version.Version.deserialize,
              )
          return self._stubs["get_version"]
  
      @property
      def create_version(
          self,
      ) -> Callable[[gcd_version.CreateVersionRequest], Awaitable[gcd_version.Version]]:
          r"""Return a callable for the create version method over gRPC.
  
          Creates an agent version.
          The new version points to the agent instance in the
          "default" environment.
  
          Returns:
              Callable[[~.CreateVersionRequest],
                      Awaitable[~.Version]]:
                  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_version" not in self._stubs:
              self._stubs["create_version"] = self.grpc_channel.unary_unary(
                  "/google.cloud.dialogflow.v2.Versions/CreateVersion",
                  request_serializer=gcd_version.CreateVersionRequest.serialize,
                  response_deserializer=gcd_version.Version.deserialize,
              )
          return self._stubs["create_version"]
  
      @property
      def update_version(
          self,
      ) -> Callable[[gcd_version.UpdateVersionRequest], Awaitable[gcd_version.Version]]:
          r"""Return a callable for the update version method over gRPC.
  
          Updates the specified agent version.
          Note that this method does not allow you to update the
          state of the agent the given version points to. It
          allows you to update only mutable properties of the
          version resource.
  
          Returns:
              Callable[[~.UpdateVersionRequest],
                      Awaitable[~.Version]]:
                  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_version" not in self._stubs:
              self._stubs["update_version"] = self.grpc_channel.unary_unary(
                  "/google.cloud.dialogflow.v2.Versions/UpdateVersion",
                  request_serializer=gcd_version.UpdateVersionRequest.serialize,
                  response_deserializer=gcd_version.Version.deserialize,
              )
          return self._stubs["update_version"]
  
      @property
      def delete_version(
          self,
      ) -> Callable[[version.DeleteVersionRequest], Awaitable[empty_pb2.Empty]]:
          r"""Return a callable for the delete version method over gRPC.
  
          Delete the specified agent version.
  
          Returns:
              Callable[[~.DeleteVersionRequest],
                      Awaitable[~.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_version" not in self._stubs:
              self._stubs["delete_version"] = self.grpc_channel.unary_unary(
                  "/google.cloud.dialogflow.v2.Versions/DeleteVersion",
                  request_serializer=version.DeleteVersionRequest.serialize,
                  response_deserializer=empty_pb2.Empty.FromString,
              )
          return self._stubs["delete_version"]
  
  
  __all__ = ("VersionsGrpcAsyncIOTransport",)
  