# frozen_string_literal: true

# 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
#
#     https://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.

# Auto-generated by gapic-generator-ruby. DO NOT EDIT!

require "gapic/operation"
require "google/longrunning/operations_pb"

module Google
  module Iam
    module V1beta
      module WorkloadIdentityPools
        # Service that implements Longrunning Operations API.
        class Operations
          # @private
          API_VERSION = ""

          # @private
          DEFAULT_ENDPOINT_TEMPLATE = "iam.$UNIVERSE_DOMAIN$"

          # @private
          attr_reader :operations_stub

          ##
          # Configuration for the WorkloadIdentityPools Operations API.
          #
          # @yield [config] Configure the Operations client.
          # @yieldparam config [Operations::Configuration]
          #
          # @return [Operations::Configuration]
          #
          def self.configure
            @configure ||= Operations::Configuration.new
            yield @configure if block_given?
            @configure
          end

          ##
          # Configure the WorkloadIdentityPools Operations instance.
          #
          # The configuration is set to the derived mode, meaning that values can be changed,
          # but structural changes (adding new fields, etc.) are not allowed. Structural changes
          # should be made on {Operations.configure}.
          #
          # @yield [config] Configure the Operations client.
          # @yieldparam config [Operations::Configuration]
          #
          # @return [Operations::Configuration]
          #
          def configure
            yield @config if block_given?
            @config
          end

          ##
          # The effective universe domain
          #
          # @return [String]
          #
          def universe_domain
            @operations_stub.universe_domain
          end

          ##
          # Create a new Operations client object.
          #
          # @yield [config] Configure the Client client.
          # @yieldparam config [Operations::Configuration]
          #
          def initialize
            # These require statements are intentionally placed here to initialize
            # the gRPC module only when it's required.
            # See https://github.com/googleapis/toolkit/issues/446
            require "gapic/grpc"
            require "google/longrunning/operations_services_pb"

            # Create the configuration object
            @config = Configuration.new Operations.configure

            # Yield the configuration if needed
            yield @config if block_given?

            # Create credentials
            credentials = @config.credentials
            credentials ||= Credentials.default scope: @config.scope
            if credentials.is_a?(::String) || credentials.is_a?(::Hash)
              credentials = Credentials.new credentials, scope: @config.scope
            end
            @quota_project_id = @config.quota_project
            @quota_project_id ||= credentials.quota_project_id if credentials.respond_to? :quota_project_id

            @operations_stub = ::Gapic::ServiceStub.new(
              ::Google::Longrunning::Operations::Stub,
              credentials: credentials,
              endpoint: @config.endpoint,
              endpoint_template: DEFAULT_ENDPOINT_TEMPLATE,
              universe_domain: @config.universe_domain,
              channel_args: @config.channel_args,
              interceptors: @config.interceptors,
              channel_pool_config: @config.channel_pool
            )

            # Used by an LRO wrapper for some methods of this service
            @operations_client = self
          end

          # Service calls

          ##
          # Lists operations that match the specified filter in the request. If the
          # server doesn't support this method, it returns `UNIMPLEMENTED`.
          #
          # @overload list_operations(request, options = nil)
          #   Pass arguments to `list_operations` via a request object, either of type
          #   {::Google::Longrunning::ListOperationsRequest} or an equivalent Hash.
          #
          #   @param request [::Google::Longrunning::ListOperationsRequest, ::Hash]
          #     A request object representing the call parameters. Required. To specify no
          #     parameters, or to keep all the default parameter values, pass an empty Hash.
          #   @param options [::Gapic::CallOptions, ::Hash]
          #     Overrides the default settings for this call, e.g, timeout, retries, etc. Optional.
          #
          # @overload list_operations(name: nil, filter: nil, page_size: nil, page_token: nil, return_partial_success: nil)
          #   Pass arguments to `list_operations` via keyword arguments. Note that at
          #   least one keyword argument is required. To specify no parameters, or to keep all
          #   the default parameter values, pass an empty Hash as a request object (see above).
          #
          #   @param name [::String]
          #     The name of the operation's parent resource.
          #   @param filter [::String]
          #     The standard list filter.
          #   @param page_size [::Integer]
          #     The standard list page size.
          #   @param page_token [::String]
          #     The standard list page token.
          #   @param return_partial_success [::Boolean]
          #     When set to `true`, operations that are reachable are returned as normal,
          #     and those that are unreachable are returned in the
          #     [ListOperationsResponse.unreachable] field.
          #
          #     This can only be `true` when reading across collections e.g. when `parent`
          #     is set to `"projects/example/locations/-"`.
          #
          #     This field is not by default supported and will result in an
          #     `UNIMPLEMENTED` error if set unless explicitly documented otherwise in
          #     service or product specific documentation.
          #
          # @yield [response, operation] Access the result along with the RPC operation
          # @yieldparam response [::Gapic::PagedEnumerable<::Gapic::Operation>]
          # @yieldparam operation [::GRPC::ActiveCall::Operation]
          #
          # @return [::Gapic::PagedEnumerable<::Gapic::Operation>]
          #
          # @raise [::Google::Cloud::Error] if the RPC is aborted.
          #
          # @example Basic example
          #   require "google/longrunning"
          #
          #   # Create a client object. The client can be reused for multiple calls.
          #   client = Google::Longrunning::Operations::Client.new
          #
          #   # Create a request. To set request fields, pass in keyword arguments.
          #   request = Google::Longrunning::ListOperationsRequest.new
          #
          #   # Call the list_operations method.
          #   result = client.list_operations request
          #
          #   # The returned object is of type Gapic::PagedEnumerable. You can iterate
          #   # over elements, and API calls will be issued to fetch pages as needed.
          #   result.each do |item|
          #     # Each element is of type ::Google::Longrunning::Operation.
          #     p item
          #   end
          #
          def list_operations request, options = nil
            raise ::ArgumentError, "request must be provided" if request.nil?

            request = ::Gapic::Protobuf.coerce request, to: ::Google::Longrunning::ListOperationsRequest

            # Converts hash and nil to an options object
            options = ::Gapic::CallOptions.new(**options.to_h) if options.respond_to? :to_h

            # Customize the options with defaults
            metadata = @config.rpcs.list_operations.metadata.to_h

            # Set x-goog-api-client, x-goog-user-project and x-goog-api-version headers
            metadata[:"x-goog-api-client"] ||= ::Gapic::Headers.x_goog_api_client \
              lib_name: @config.lib_name, lib_version: @config.lib_version,
              gapic_version: ::Google::Iam::V1beta::VERSION
            metadata[:"x-goog-api-version"] = API_VERSION unless API_VERSION.empty?
            metadata[:"x-goog-user-project"] = @quota_project_id if @quota_project_id

            header_params = {}
            if request.name
              header_params["name"] = request.name
            end

            request_params_header = header_params.map { |k, v| "#{k}=#{v}" }.join("&")
            metadata[:"x-goog-request-params"] ||= request_params_header

            options.apply_defaults timeout:      @config.rpcs.list_operations.timeout,
                                   metadata:     metadata,
                                   retry_policy: @config.rpcs.list_operations.retry_policy

            options.apply_defaults timeout:      @config.timeout,
                                   metadata:     @config.metadata,
                                   retry_policy: @config.retry_policy

            @operations_stub.call_rpc :list_operations, request, options: options do |response, operation|
              wrap_lro_operation = ->(op_response) { ::Gapic::Operation.new op_response, @operations_client }
              response = ::Gapic::PagedEnumerable.new @operations_stub, :list_operations, request, response, operation, options, format_resource: wrap_lro_operation
              yield response, operation if block_given?
              throw :response, response
            end
          rescue ::GRPC::BadStatus => e
            raise ::Google::Cloud::Error.from_error(e)
          end

          ##
          # Gets the latest state of a long-running operation.  Clients can use this
          # method to poll the operation result at intervals as recommended by the API
          # service.
          #
          # @overload get_operation(request, options = nil)
          #   Pass arguments to `get_operation` via a request object, either of type
          #   {::Google::Longrunning::GetOperationRequest} or an equivalent Hash.
          #
          #   @param request [::Google::Longrunning::GetOperationRequest, ::Hash]
          #     A request object representing the call parameters. Required. To specify no
          #     parameters, or to keep all the default parameter values, pass an empty Hash.
          #   @param options [::Gapic::CallOptions, ::Hash]
          #     Overrides the default settings for this call, e.g, timeout, retries, etc. Optional.
          #
          # @overload get_operation(name: nil)
          #   Pass arguments to `get_operation` via keyword arguments. Note that at
          #   least one keyword argument is required. To specify no parameters, or to keep all
          #   the default parameter values, pass an empty Hash as a request object (see above).
          #
          #   @param name [::String]
          #     The name of the operation resource.
          #
          # @yield [response, operation] Access the result along with the RPC operation
          # @yieldparam response [::Gapic::Operation]
          # @yieldparam operation [::GRPC::ActiveCall::Operation]
          #
          # @return [::Gapic::Operation]
          #
          # @raise [::Google::Cloud::Error] if the RPC is aborted.
          #
          # @example Basic example
          #   require "google/longrunning"
          #
          #   # Create a client object. The client can be reused for multiple calls.
          #   client = Google::Longrunning::Operations::Client.new
          #
          #   # Create a request. To set request fields, pass in keyword arguments.
          #   request = Google::Longrunning::GetOperationRequest.new
          #
          #   # Call the get_operation method.
          #   result = client.get_operation request
          #
          #   # The returned object is of type Gapic::Operation. You can use it to
          #   # check the status of an operation, cancel it, or wait for results.
          #   # Here is how to wait for a response.
          #   result.wait_until_done! timeout: 60
          #   if result.response?
          #     p result.response
          #   else
          #     puts "No response received."
          #   end
          #
          def get_operation request, options = nil
            raise ::ArgumentError, "request must be provided" if request.nil?

            request = ::Gapic::Protobuf.coerce request, to: ::Google::Longrunning::GetOperationRequest

            # Converts hash and nil to an options object
            options = ::Gapic::CallOptions.new(**options.to_h) if options.respond_to? :to_h

            # Customize the options with defaults
            metadata = @config.rpcs.get_operation.metadata.to_h

            # Set x-goog-api-client, x-goog-user-project and x-goog-api-version headers
            metadata[:"x-goog-api-client"] ||= ::Gapic::Headers.x_goog_api_client \
              lib_name: @config.lib_name, lib_version: @config.lib_version,
              gapic_version: ::Google::Iam::V1beta::VERSION
            metadata[:"x-goog-api-version"] = API_VERSION unless API_VERSION.empty?
            metadata[:"x-goog-user-project"] = @quota_project_id if @quota_project_id

            header_params = {}
            if request.name
              header_params["name"] = request.name
            end

            request_params_header = header_params.map { |k, v| "#{k}=#{v}" }.join("&")
            metadata[:"x-goog-request-params"] ||= request_params_header

            options.apply_defaults timeout:      @config.rpcs.get_operation.timeout,
                                   metadata:     metadata,
                                   retry_policy: @config.rpcs.get_operation.retry_policy

            options.apply_defaults timeout:      @config.timeout,
                                   metadata:     @config.metadata,
                                   retry_policy: @config.retry_policy

            @operations_stub.call_rpc :get_operation, request, options: options do |response, operation|
              response = ::Gapic::Operation.new response, @operations_client, options: options
              yield response, operation if block_given?
              throw :response, response
            end
          rescue ::GRPC::BadStatus => e
            raise ::Google::Cloud::Error.from_error(e)
          end

          ##
          # Deletes a long-running operation. This method indicates that the client is
          # no longer interested in the operation result. It does not cancel the
          # operation. If the server doesn't support this method, it returns
          # `google.rpc.Code.UNIMPLEMENTED`.
          #
          # @overload delete_operation(request, options = nil)
          #   Pass arguments to `delete_operation` via a request object, either of type
          #   {::Google::Longrunning::DeleteOperationRequest} or an equivalent Hash.
          #
          #   @param request [::Google::Longrunning::DeleteOperationRequest, ::Hash]
          #     A request object representing the call parameters. Required. To specify no
          #     parameters, or to keep all the default parameter values, pass an empty Hash.
          #   @param options [::Gapic::CallOptions, ::Hash]
          #     Overrides the default settings for this call, e.g, timeout, retries, etc. Optional.
          #
          # @overload delete_operation(name: nil)
          #   Pass arguments to `delete_operation` via keyword arguments. Note that at
          #   least one keyword argument is required. To specify no parameters, or to keep all
          #   the default parameter values, pass an empty Hash as a request object (see above).
          #
          #   @param name [::String]
          #     The name of the operation resource to be deleted.
          #
          # @yield [response, operation] Access the result along with the RPC operation
          # @yieldparam response [::Google::Protobuf::Empty]
          # @yieldparam operation [::GRPC::ActiveCall::Operation]
          #
          # @return [::Google::Protobuf::Empty]
          #
          # @raise [::Google::Cloud::Error] if the RPC is aborted.
          #
          # @example Basic example
          #   require "google/longrunning"
          #
          #   # Create a client object. The client can be reused for multiple calls.
          #   client = Google::Longrunning::Operations::Client.new
          #
          #   # Create a request. To set request fields, pass in keyword arguments.
          #   request = Google::Longrunning::DeleteOperationRequest.new
          #
          #   # Call the delete_operation method.
          #   result = client.delete_operation request
          #
          #   # The returned object is of type Google::Protobuf::Empty.
          #   p result
          #
          def delete_operation request, options = nil
            raise ::ArgumentError, "request must be provided" if request.nil?

            request = ::Gapic::Protobuf.coerce request, to: ::Google::Longrunning::DeleteOperationRequest

            # Converts hash and nil to an options object
            options = ::Gapic::CallOptions.new(**options.to_h) if options.respond_to? :to_h

            # Customize the options with defaults
            metadata = @config.rpcs.delete_operation.metadata.to_h

            # Set x-goog-api-client, x-goog-user-project and x-goog-api-version headers
            metadata[:"x-goog-api-client"] ||= ::Gapic::Headers.x_goog_api_client \
              lib_name: @config.lib_name, lib_version: @config.lib_version,
              gapic_version: ::Google::Iam::V1beta::VERSION
            metadata[:"x-goog-api-version"] = API_VERSION unless API_VERSION.empty?
            metadata[:"x-goog-user-project"] = @quota_project_id if @quota_project_id

            header_params = {}
            if request.name
              header_params["name"] = request.name
            end

            request_params_header = header_params.map { |k, v| "#{k}=#{v}" }.join("&")
            metadata[:"x-goog-request-params"] ||= request_params_header

            options.apply_defaults timeout:      @config.rpcs.delete_operation.timeout,
                                   metadata:     metadata,
                                   retry_policy: @config.rpcs.delete_operation.retry_policy

            options.apply_defaults timeout:      @config.timeout,
                                   metadata:     @config.metadata,
                                   retry_policy: @config.retry_policy

            @operations_stub.call_rpc :delete_operation, request, options: options do |response, operation|
              yield response, operation if block_given?
            end
          rescue ::GRPC::BadStatus => e
            raise ::Google::Cloud::Error.from_error(e)
          end

          ##
          # Starts asynchronous cancellation on a long-running operation.  The server
          # makes a best effort to cancel the operation, but success is not
          # guaranteed.  If the server doesn't support this method, it returns
          # `google.rpc.Code.UNIMPLEMENTED`.  Clients can use
          # Operations.GetOperation or
          # other methods to check whether the cancellation succeeded or whether the
          # operation completed despite cancellation. On successful cancellation,
          # the operation is not deleted; instead, it becomes an operation with
          # an {::Google::Longrunning::Operation#error Operation.error} value with a
          # {::Google::Rpc::Status#code google.rpc.Status.code} of `1`, corresponding to
          # `Code.CANCELLED`.
          #
          # @overload cancel_operation(request, options = nil)
          #   Pass arguments to `cancel_operation` via a request object, either of type
          #   {::Google::Longrunning::CancelOperationRequest} or an equivalent Hash.
          #
          #   @param request [::Google::Longrunning::CancelOperationRequest, ::Hash]
          #     A request object representing the call parameters. Required. To specify no
          #     parameters, or to keep all the default parameter values, pass an empty Hash.
          #   @param options [::Gapic::CallOptions, ::Hash]
          #     Overrides the default settings for this call, e.g, timeout, retries, etc. Optional.
          #
          # @overload cancel_operation(name: nil)
          #   Pass arguments to `cancel_operation` via keyword arguments. Note that at
          #   least one keyword argument is required. To specify no parameters, or to keep all
          #   the default parameter values, pass an empty Hash as a request object (see above).
          #
          #   @param name [::String]
          #     The name of the operation resource to be cancelled.
          #
          # @yield [response, operation] Access the result along with the RPC operation
          # @yieldparam response [::Google::Protobuf::Empty]
          # @yieldparam operation [::GRPC::ActiveCall::Operation]
          #
          # @return [::Google::Protobuf::Empty]
          #
          # @raise [::Google::Cloud::Error] if the RPC is aborted.
          #
          # @example Basic example
          #   require "google/longrunning"
          #
          #   # Create a client object. The client can be reused for multiple calls.
          #   client = Google::Longrunning::Operations::Client.new
          #
          #   # Create a request. To set request fields, pass in keyword arguments.
          #   request = Google::Longrunning::CancelOperationRequest.new
          #
          #   # Call the cancel_operation method.
          #   result = client.cancel_operation request
          #
          #   # The returned object is of type Google::Protobuf::Empty.
          #   p result
          #
          def cancel_operation request, options = nil
            raise ::ArgumentError, "request must be provided" if request.nil?

            request = ::Gapic::Protobuf.coerce request, to: ::Google::Longrunning::CancelOperationRequest

            # Converts hash and nil to an options object
            options = ::Gapic::CallOptions.new(**options.to_h) if options.respond_to? :to_h

            # Customize the options with defaults
            metadata = @config.rpcs.cancel_operation.metadata.to_h

            # Set x-goog-api-client, x-goog-user-project and x-goog-api-version headers
            metadata[:"x-goog-api-client"] ||= ::Gapic::Headers.x_goog_api_client \
              lib_name: @config.lib_name, lib_version: @config.lib_version,
              gapic_version: ::Google::Iam::V1beta::VERSION
            metadata[:"x-goog-api-version"] = API_VERSION unless API_VERSION.empty?
            metadata[:"x-goog-user-project"] = @quota_project_id if @quota_project_id

            header_params = {}
            if request.name
              header_params["name"] = request.name
            end

            request_params_header = header_params.map { |k, v| "#{k}=#{v}" }.join("&")
            metadata[:"x-goog-request-params"] ||= request_params_header

            options.apply_defaults timeout:      @config.rpcs.cancel_operation.timeout,
                                   metadata:     metadata,
                                   retry_policy: @config.rpcs.cancel_operation.retry_policy

            options.apply_defaults timeout:      @config.timeout,
                                   metadata:     @config.metadata,
                                   retry_policy: @config.retry_policy

            @operations_stub.call_rpc :cancel_operation, request, options: options do |response, operation|
              yield response, operation if block_given?
            end
          rescue ::GRPC::BadStatus => e
            raise ::Google::Cloud::Error.from_error(e)
          end

          ##
          # Waits until the specified long-running operation is done or reaches at most
          # a specified timeout, returning the latest state.  If the operation is
          # already done, the latest state is immediately returned.  If the timeout
          # specified is greater than the default HTTP/RPC timeout, the HTTP/RPC
          # timeout is used.  If the server does not support this method, it returns
          # `google.rpc.Code.UNIMPLEMENTED`.
          # Note that this method is on a best-effort basis.  It may return the latest
          # state before the specified timeout (including immediately), meaning even an
          # immediate response is no guarantee that the operation is done.
          #
          # @overload wait_operation(request, options = nil)
          #   Pass arguments to `wait_operation` via a request object, either of type
          #   {::Google::Longrunning::WaitOperationRequest} or an equivalent Hash.
          #
          #   @param request [::Google::Longrunning::WaitOperationRequest, ::Hash]
          #     A request object representing the call parameters. Required. To specify no
          #     parameters, or to keep all the default parameter values, pass an empty Hash.
          #   @param options [::Gapic::CallOptions, ::Hash]
          #     Overrides the default settings for this call, e.g, timeout, retries, etc. Optional.
          #
          # @overload wait_operation(name: nil, timeout: nil)
          #   Pass arguments to `wait_operation` via keyword arguments. Note that at
          #   least one keyword argument is required. To specify no parameters, or to keep all
          #   the default parameter values, pass an empty Hash as a request object (see above).
          #
          #   @param name [::String]
          #     The name of the operation resource to wait on.
          #   @param timeout [::Google::Protobuf::Duration, ::Hash]
          #     The maximum duration to wait before timing out. If left blank, the wait
          #     will be at most the time permitted by the underlying HTTP/RPC protocol.
          #     If RPC context deadline is also specified, the shorter one will be used.
          #
          # @yield [response, operation] Access the result along with the RPC operation
          # @yieldparam response [::Gapic::Operation]
          # @yieldparam operation [::GRPC::ActiveCall::Operation]
          #
          # @return [::Gapic::Operation]
          #
          # @raise [::Google::Cloud::Error] if the RPC is aborted.
          #
          # @example Basic example
          #   require "google/longrunning"
          #
          #   # Create a client object. The client can be reused for multiple calls.
          #   client = Google::Longrunning::Operations::Client.new
          #
          #   # Create a request. To set request fields, pass in keyword arguments.
          #   request = Google::Longrunning::WaitOperationRequest.new
          #
          #   # Call the wait_operation method.
          #   result = client.wait_operation request
          #
          #   # The returned object is of type Gapic::Operation. You can use it to
          #   # check the status of an operation, cancel it, or wait for results.
          #   # Here is how to wait for a response.
          #   result.wait_until_done! timeout: 60
          #   if result.response?
          #     p result.response
          #   else
          #     puts "No response received."
          #   end
          #
          def wait_operation request, options = nil
            raise ::ArgumentError, "request must be provided" if request.nil?

            request = ::Gapic::Protobuf.coerce request, to: ::Google::Longrunning::WaitOperationRequest

            # Converts hash and nil to an options object
            options = ::Gapic::CallOptions.new(**options.to_h) if options.respond_to? :to_h

            # Customize the options with defaults
            metadata = @config.rpcs.wait_operation.metadata.to_h

            # Set x-goog-api-client, x-goog-user-project and x-goog-api-version headers
            metadata[:"x-goog-api-client"] ||= ::Gapic::Headers.x_goog_api_client \
              lib_name: @config.lib_name, lib_version: @config.lib_version,
              gapic_version: ::Google::Iam::V1beta::VERSION
            metadata[:"x-goog-api-version"] = API_VERSION unless API_VERSION.empty?
            metadata[:"x-goog-user-project"] = @quota_project_id if @quota_project_id

            options.apply_defaults timeout:      @config.rpcs.wait_operation.timeout,
                                   metadata:     metadata,
                                   retry_policy: @config.rpcs.wait_operation.retry_policy

            options.apply_defaults timeout:      @config.timeout,
                                   metadata:     @config.metadata,
                                   retry_policy: @config.retry_policy

            @operations_stub.call_rpc :wait_operation, request, options: options do |response, operation|
              response = ::Gapic::Operation.new response, @operations_client, options: options
              yield response, operation if block_given?
              throw :response, response
            end
          rescue ::GRPC::BadStatus => e
            raise ::Google::Cloud::Error.from_error(e)
          end

          ##
          # Configuration class for the Operations API.
          #
          # This class represents the configuration for Operations,
          # providing control over timeouts, retry behavior, logging, transport
          # parameters, and other low-level controls. Certain parameters can also be
          # applied individually to specific RPCs. See
          # {::Google::Longrunning::Operations::Client::Configuration::Rpcs}
          # for a list of RPCs that can be configured independently.
          #
          # Configuration can be applied globally to all clients, or to a single client
          # on construction.
          #
          # @example
          #
          #   # Modify the global config, setting the timeout for
          #   # list_operations to 20 seconds,
          #   # and all remaining timeouts to 10 seconds.
          #   ::Google::Longrunning::Operations::Client.configure do |config|
          #     config.timeout = 10.0
          #     config.rpcs.list_operations.timeout = 20.0
          #   end
          #
          #   # Apply the above configuration only to a new client.
          #   client = ::Google::Longrunning::Operations::Client.new do |config|
          #     config.timeout = 10.0
          #     config.rpcs.list_operations.timeout = 20.0
          #   end
          #
          # @!attribute [rw] endpoint
          #   A custom service endpoint, as a hostname or hostname:port. The default is
          #   nil, indicating to use the default endpoint in the current universe domain.
          #   @return [::String,nil]
          # @!attribute [rw] credentials
          #   Credentials to send with calls. You may provide any of the following types:
          #    *  (`String`) The path to a service account key file in JSON format
          #    *  (`Hash`) A service account key as a Hash
          #    *  (`Google::Auth::Credentials`) A googleauth credentials object
          #       (see the [googleauth docs](https://rubydoc.info/gems/googleauth/Google/Auth/Credentials))
          #    *  (`Signet::OAuth2::Client`) A signet oauth2 client object
          #       (see the [signet docs](https://rubydoc.info/gems/signet/Signet/OAuth2/Client))
          #    *  (`GRPC::Core::Channel`) a gRPC channel with included credentials
          #    *  (`GRPC::Core::ChannelCredentials`) a gRPC credentails object
          #    *  (`nil`) indicating no credentials
          #
          #   Warning: If you accept a credential configuration (JSON file or Hash) from an
          #   external source for authentication to Google Cloud, you must validate it before
          #   providing it to a Google API client library. Providing an unvalidated credential
          #   configuration to Google APIs can compromise the security of your systems and data.
          #   For more information, refer to [Validate credential configurations from external
          #   sources](https://cloud.google.com/docs/authentication/external/externally-sourced-credentials).
          #   @return [::Object]
          # @!attribute [rw] scope
          #   The OAuth scopes
          #   @return [::Array<::String>]
          # @!attribute [rw] lib_name
          #   The library name as recorded in instrumentation and logging
          #   @return [::String]
          # @!attribute [rw] lib_version
          #   The library version as recorded in instrumentation and logging
          #   @return [::String]
          # @!attribute [rw] channel_args
          #   Extra parameters passed to the gRPC channel. Note: this is ignored if a
          #   `GRPC::Core::Channel` object is provided as the credential.
          #   @return [::Hash]
          # @!attribute [rw] interceptors
          #   An array of interceptors that are run before calls are executed.
          #   @return [::Array<::GRPC::ClientInterceptor>]
          # @!attribute [rw] timeout
          #   The call timeout in seconds.
          #   @return [::Numeric]
          # @!attribute [rw] metadata
          #   Additional gRPC headers to be sent with the call.
          #   @return [::Hash{::Symbol=>::String}]
          # @!attribute [rw] retry_policy
          #   The retry policy. The value is a hash with the following keys:
          #    *  `:initial_delay` (*type:* `Numeric`) - The initial delay in seconds.
          #    *  `:max_delay` (*type:* `Numeric`) - The max delay in seconds.
          #    *  `:multiplier` (*type:* `Numeric`) - The incremental backoff multiplier.
          #    *  `:retry_codes` (*type:* `Array<String>`) - The error codes that should
          #       trigger a retry.
          #   @return [::Hash]
          # @!attribute [rw] quota_project
          #   A separate project against which to charge quota.
          #   @return [::String]
          # @!attribute [rw] universe_domain
          #   The universe domain within which to make requests. This determines the
          #   default endpoint URL. The default value of nil uses the environment
          #   universe (usually the default "googleapis.com" universe).
          #   @return [::String,nil]
          # @!attribute [rw] logger
          #   A custom logger to use for request/response debug logging, or the value
          #   `:default` (the default) to construct a default logger, or `nil` to
          #   explicitly disable logging.
          #   @return [::Logger,:default,nil]
          #
          class Configuration
            extend ::Gapic::Config

            # @private
            # The endpoint specific to the default "googleapis.com" universe. Deprecated.
            DEFAULT_ENDPOINT = "iam.googleapis.com"

            config_attr :endpoint,      nil, ::String, nil
            config_attr :credentials,   nil do |value|
              allowed = [::String, ::Hash, ::Proc, ::Symbol, ::Google::Auth::Credentials, ::Google::Auth::BaseClient, ::Signet::OAuth2::Client, nil]
              allowed += [::GRPC::Core::Channel, ::GRPC::Core::ChannelCredentials] if defined? ::GRPC::Core::Channel
              allowed.any? { |klass| klass === value }
            end
            config_attr :scope,         nil, ::String, ::Array, nil
            config_attr :lib_name,      nil, ::String, nil
            config_attr :lib_version,   nil, ::String, nil
            config_attr(:channel_args,  { "grpc.service_config_disable_resolution" => 1 }, ::Hash, nil)
            config_attr :interceptors,  nil, ::Array, nil
            config_attr :timeout,       nil, ::Numeric, nil
            config_attr :metadata,      nil, ::Hash, nil
            config_attr :retry_policy,  nil, ::Hash, ::Proc, nil
            config_attr :quota_project, nil, ::String, nil
            config_attr :universe_domain, nil, ::String, nil
            config_attr :logger, :default, ::Logger, nil, :default

            # @private
            def initialize parent_config = nil
              @parent_config = parent_config unless parent_config.nil?

              yield self if block_given?
            end

            ##
            # Configurations for individual RPCs
            # @return [Rpcs]
            #
            def rpcs
              @rpcs ||= begin
                parent_rpcs = nil
                parent_rpcs = @parent_config.rpcs if defined?(@parent_config) && @parent_config.respond_to?(:rpcs)
                Rpcs.new parent_rpcs
              end
            end

            ##
            # Configuration for the channel pool
            # @return [::Gapic::ServiceStub::ChannelPool::Configuration]
            #
            def channel_pool
              @channel_pool ||= ::Gapic::ServiceStub::ChannelPool::Configuration.new
            end

            ##
            # Configuration RPC class for the Operations API.
            #
            # Includes fields providing the configuration for each RPC in this service.
            # Each configuration object is of type `Gapic::Config::Method` and includes
            # the following configuration fields:
            #
            #  *  `timeout` (*type:* `Numeric`) - The call timeout in seconds
            #  *  `metadata` (*type:* `Hash{Symbol=>String}`) - Additional gRPC headers
            #  *  `retry_policy (*type:* `Hash`) - The retry policy. The policy fields
            #     include the following keys:
            #      *  `:initial_delay` (*type:* `Numeric`) - The initial delay in seconds.
            #      *  `:max_delay` (*type:* `Numeric`) - The max delay in seconds.
            #      *  `:multiplier` (*type:* `Numeric`) - The incremental backoff multiplier.
            #      *  `:retry_codes` (*type:* `Array<String>`) - The error codes that should
            #         trigger a retry.
            #
            class Rpcs
              ##
              # RPC-specific configuration for `list_operations`
              # @return [::Gapic::Config::Method]
              #
              attr_reader :list_operations
              ##
              # RPC-specific configuration for `get_operation`
              # @return [::Gapic::Config::Method]
              #
              attr_reader :get_operation
              ##
              # RPC-specific configuration for `delete_operation`
              # @return [::Gapic::Config::Method]
              #
              attr_reader :delete_operation
              ##
              # RPC-specific configuration for `cancel_operation`
              # @return [::Gapic::Config::Method]
              #
              attr_reader :cancel_operation
              ##
              # RPC-specific configuration for `wait_operation`
              # @return [::Gapic::Config::Method]
              #
              attr_reader :wait_operation

              # @private
              def initialize parent_rpcs = nil
                list_operations_config = parent_rpcs.list_operations if parent_rpcs.respond_to? :list_operations
                @list_operations = ::Gapic::Config::Method.new list_operations_config
                get_operation_config = parent_rpcs.get_operation if parent_rpcs.respond_to? :get_operation
                @get_operation = ::Gapic::Config::Method.new get_operation_config
                delete_operation_config = parent_rpcs.delete_operation if parent_rpcs.respond_to? :delete_operation
                @delete_operation = ::Gapic::Config::Method.new delete_operation_config
                cancel_operation_config = parent_rpcs.cancel_operation if parent_rpcs.respond_to? :cancel_operation
                @cancel_operation = ::Gapic::Config::Method.new cancel_operation_config
                wait_operation_config = parent_rpcs.wait_operation if parent_rpcs.respond_to? :wait_operation
                @wait_operation = ::Gapic::Config::Method.new wait_operation_config

                yield self if block_given?
              end
            end
          end
        end
      end
    end
  end
end
