# -*- 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.
#

from collections import OrderedDict
from distutils import util
import os
import re
from typing import Callable, Dict, Optional, Sequence, Tuple, Type, Union
import pkg_resources

from google.api_core import client_options as client_options_lib  # type: ignore
from google.api_core import exceptions  # type: ignore
from google.api_core import gapic_v1  # type: ignore
from google.api_core import retry as retries  # type: ignore
from google.auth import credentials  # type: ignore
from google.auth.transport import mtls  # type: ignore
from google.auth.transport.grpc import SslCredentials  # type: ignore
from google.auth.exceptions import MutualTLSChannelError  # type: ignore
from google.oauth2 import service_account  # type: ignore

from google.cloud.compute_v1.services.instance_group_managers import pagers
from google.cloud.compute_v1.types import compute

from .transports.base import InstanceGroupManagersTransport, DEFAULT_CLIENT_INFO
from .transports.rest import InstanceGroupManagersRestTransport


class InstanceGroupManagersClientMeta(type):
    """Metaclass for the InstanceGroupManagers client.

    This provides class-level methods for building and retrieving
    support objects (e.g. transport) without polluting the client instance
    objects.
    """

    _transport_registry = (
        OrderedDict()
    )  # type: Dict[str, Type[InstanceGroupManagersTransport]]
    _transport_registry["rest"] = InstanceGroupManagersRestTransport

    def get_transport_class(
        cls, label: str = None,
    ) -> Type[InstanceGroupManagersTransport]:
        """Return an appropriate transport class.

        Args:
            label: The name of the desired transport. If none is
                provided, then the first transport in the registry is used.

        Returns:
            The transport class to use.
        """
        # If a specific transport is requested, return that one.
        if label:
            return cls._transport_registry[label]

        # No transport is requested; return the default (that is, the first one
        # in the dictionary).
        return next(iter(cls._transport_registry.values()))


class InstanceGroupManagersClient(metaclass=InstanceGroupManagersClientMeta):
    """The InstanceGroupManagers API."""

    @staticmethod
    def _get_default_mtls_endpoint(api_endpoint):
        """Convert api endpoint to mTLS endpoint.
        Convert "*.sandbox.googleapis.com" and "*.googleapis.com" to
        "*.mtls.sandbox.googleapis.com" and "*.mtls.googleapis.com" respectively.
        Args:
            api_endpoint (Optional[str]): the api endpoint to convert.
        Returns:
            str: converted mTLS api endpoint.
        """
        if not api_endpoint:
            return api_endpoint

        mtls_endpoint_re = re.compile(
            r"(?P<name>[^.]+)(?P<mtls>\.mtls)?(?P<sandbox>\.sandbox)?(?P<googledomain>\.googleapis\.com)?"
        )

        m = mtls_endpoint_re.match(api_endpoint)
        name, mtls, sandbox, googledomain = m.groups()
        if mtls or not googledomain:
            return api_endpoint

        if sandbox:
            return api_endpoint.replace(
                "sandbox.googleapis.com", "mtls.sandbox.googleapis.com"
            )

        return api_endpoint.replace(".googleapis.com", ".mtls.googleapis.com")

    DEFAULT_ENDPOINT = "compute.googleapis.com"
    DEFAULT_MTLS_ENDPOINT = _get_default_mtls_endpoint.__func__(  # type: ignore
        DEFAULT_ENDPOINT
    )

    @classmethod
    def from_service_account_info(cls, info: dict, *args, **kwargs):
        """Creates an instance of this client using the provided credentials info.

        Args:
            info (dict): The service account private key info.
            args: Additional arguments to pass to the constructor.
            kwargs: Additional arguments to pass to the constructor.

        Returns:
            InstanceGroupManagersClient: The constructed client.
        """
        credentials = service_account.Credentials.from_service_account_info(info)
        kwargs["credentials"] = credentials
        return cls(*args, **kwargs)

    @classmethod
    def from_service_account_file(cls, filename: str, *args, **kwargs):
        """Creates an instance of this client using the provided credentials
        file.

        Args:
            filename (str): The path to the service account private key json
                file.
            args: Additional arguments to pass to the constructor.
            kwargs: Additional arguments to pass to the constructor.

        Returns:
            InstanceGroupManagersClient: The constructed client.
        """
        credentials = service_account.Credentials.from_service_account_file(filename)
        kwargs["credentials"] = credentials
        return cls(*args, **kwargs)

    from_service_account_json = from_service_account_file

    @property
    def transport(self) -> InstanceGroupManagersTransport:
        """Return the transport used by the client instance.

        Returns:
            InstanceGroupManagersTransport: The transport used by the client instance.
        """
        return self._transport

    @staticmethod
    def common_billing_account_path(billing_account: str,) -> str:
        """Return a fully-qualified billing_account string."""
        return "billingAccounts/{billing_account}".format(
            billing_account=billing_account,
        )

    @staticmethod
    def parse_common_billing_account_path(path: str) -> Dict[str, str]:
        """Parse a billing_account path into its component segments."""
        m = re.match(r"^billingAccounts/(?P<billing_account>.+?)$", path)
        return m.groupdict() if m else {}

    @staticmethod
    def common_folder_path(folder: str,) -> str:
        """Return a fully-qualified folder string."""
        return "folders/{folder}".format(folder=folder,)

    @staticmethod
    def parse_common_folder_path(path: str) -> Dict[str, str]:
        """Parse a folder path into its component segments."""
        m = re.match(r"^folders/(?P<folder>.+?)$", path)
        return m.groupdict() if m else {}

    @staticmethod
    def common_organization_path(organization: str,) -> str:
        """Return a fully-qualified organization string."""
        return "organizations/{organization}".format(organization=organization,)

    @staticmethod
    def parse_common_organization_path(path: str) -> Dict[str, str]:
        """Parse a organization path into its component segments."""
        m = re.match(r"^organizations/(?P<organization>.+?)$", path)
        return m.groupdict() if m else {}

    @staticmethod
    def common_project_path(project: str,) -> str:
        """Return a fully-qualified project string."""
        return "projects/{project}".format(project=project,)

    @staticmethod
    def parse_common_project_path(path: str) -> Dict[str, str]:
        """Parse a project path into its component segments."""
        m = re.match(r"^projects/(?P<project>.+?)$", path)
        return m.groupdict() if m else {}

    @staticmethod
    def common_location_path(project: str, location: str,) -> str:
        """Return a fully-qualified location string."""
        return "projects/{project}/locations/{location}".format(
            project=project, location=location,
        )

    @staticmethod
    def parse_common_location_path(path: str) -> Dict[str, str]:
        """Parse a location path into its component segments."""
        m = re.match(r"^projects/(?P<project>.+?)/locations/(?P<location>.+?)$", path)
        return m.groupdict() if m else {}

    def __init__(
        self,
        *,
        credentials: Optional[credentials.Credentials] = None,
        transport: Union[str, InstanceGroupManagersTransport, None] = None,
        client_options: Optional[client_options_lib.ClientOptions] = None,
        client_info: gapic_v1.client_info.ClientInfo = DEFAULT_CLIENT_INFO,
    ) -> None:
        """Instantiate the instance group managers client.

        Args:
            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.
            transport (Union[str, InstanceGroupManagersTransport]): The
                transport to use. If set to None, a transport is chosen
                automatically.
            client_options (google.api_core.client_options.ClientOptions): Custom options for the
                client. It won't take effect if a ``transport`` instance is provided.
                (1) The ``api_endpoint`` property can be used to override the
                default endpoint provided by the client. GOOGLE_API_USE_MTLS_ENDPOINT
                environment variable can also be used to override the endpoint:
                "always" (always use the default mTLS endpoint), "never" (always
                use the default regular endpoint) and "auto" (auto switch to the
                default mTLS endpoint if client certificate is present, this is
                the default value). However, the ``api_endpoint`` property takes
                precedence if provided.
                (2) If GOOGLE_API_USE_CLIENT_CERTIFICATE environment variable
                is "true", then the ``client_cert_source`` property can be used
                to provide client certificate for mutual TLS transport. If
                not provided, the default SSL client certificate will be used if
                present. If GOOGLE_API_USE_CLIENT_CERTIFICATE is "false" or not
                set, no client certificate will be used.
            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.

        Raises:
            google.auth.exceptions.MutualTLSChannelError: If mutual TLS transport
                creation failed for any reason.
        """
        if isinstance(client_options, dict):
            client_options = client_options_lib.from_dict(client_options)
        if client_options is None:
            client_options = client_options_lib.ClientOptions()

        # Create SSL credentials for mutual TLS if needed.
        use_client_cert = bool(
            util.strtobool(os.getenv("GOOGLE_API_USE_CLIENT_CERTIFICATE", "false"))
        )

        client_cert_source_func = None
        is_mtls = False
        if use_client_cert:
            if client_options.client_cert_source:
                is_mtls = True
                client_cert_source_func = client_options.client_cert_source
            else:
                is_mtls = mtls.has_default_client_cert_source()
                client_cert_source_func = (
                    mtls.default_client_cert_source() if is_mtls else None
                )

        # Figure out which api endpoint to use.
        if client_options.api_endpoint is not None:
            api_endpoint = client_options.api_endpoint
        else:
            use_mtls_env = os.getenv("GOOGLE_API_USE_MTLS_ENDPOINT", "auto")
            if use_mtls_env == "never":
                api_endpoint = self.DEFAULT_ENDPOINT
            elif use_mtls_env == "always":
                api_endpoint = self.DEFAULT_MTLS_ENDPOINT
            elif use_mtls_env == "auto":
                api_endpoint = (
                    self.DEFAULT_MTLS_ENDPOINT if is_mtls else self.DEFAULT_ENDPOINT
                )
            else:
                raise MutualTLSChannelError(
                    "Unsupported GOOGLE_API_USE_MTLS_ENDPOINT value. Accepted values: never, auto, always"
                )

        # Save or instantiate the transport.
        # Ordinarily, we provide the transport, but allowing a custom transport
        # instance provides an extensibility point for unusual situations.
        if isinstance(transport, InstanceGroupManagersTransport):
            # transport is a InstanceGroupManagersTransport instance.
            if credentials or client_options.credentials_file:
                raise ValueError(
                    "When providing a transport instance, "
                    "provide its credentials directly."
                )
            if client_options.scopes:
                raise ValueError(
                    "When providing a transport instance, "
                    "provide its scopes directly."
                )
            self._transport = transport
        else:
            Transport = type(self).get_transport_class(transport)
            self._transport = Transport(
                credentials=credentials,
                credentials_file=client_options.credentials_file,
                host=api_endpoint,
                scopes=client_options.scopes,
                client_cert_source_for_mtls=client_cert_source_func,
                quota_project_id=client_options.quota_project_id,
                client_info=client_info,
            )

    def abandon_instances(
        self,
        request: compute.AbandonInstancesInstanceGroupManagerRequest = None,
        *,
        project: str = None,
        zone: str = None,
        instance_group_manager: str = None,
        instance_group_managers_abandon_instances_request_resource: compute.InstanceGroupManagersAbandonInstancesRequest = None,
        retry: retries.Retry = gapic_v1.method.DEFAULT,
        timeout: float = None,
        metadata: Sequence[Tuple[str, str]] = (),
    ) -> compute.Operation:
        r"""Flags the specified instances to be removed from the
        managed instance group. Abandoning an instance does not
        delete the instance, but it does remove the instance
        from any target pools that are applied by the managed
        instance group. This method reduces the targetSize of
        the managed instance group by the number of instances
        that you abandon. This operation is marked as DONE when
        the action is scheduled even if the instances have not
        yet been removed from the group. You must separately
        verify the status of the abandoning action with the
        listmanagedinstances method.  If the group is part of a
        backend service that has enabled connection draining, it
        can take up to 60 seconds after the connection draining
        duration has elapsed before the VM instance is removed
        or deleted.
        You can specify a maximum of 1000 instances with this
        method per request.

        Args:
            request (google.cloud.compute_v1.types.AbandonInstancesInstanceGroupManagerRequest):
                The request object. A request message for
                InstanceGroupManagers.AbandonInstances. See the method
                description for details.
            project (str):
                Project ID for this request.
                This corresponds to the ``project`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            zone (str):
                The name of the zone where the
                managed instance group is located.

                This corresponds to the ``zone`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            instance_group_manager (str):
                The name of the managed instance
                group.

                This corresponds to the ``instance_group_manager`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            instance_group_managers_abandon_instances_request_resource (google.cloud.compute_v1.types.InstanceGroupManagersAbandonInstancesRequest):
                The body resource for this request
                This corresponds to the ``instance_group_managers_abandon_instances_request_resource`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.

            retry (google.api_core.retry.Retry): Designation of what errors, if any,
                should be retried.
            timeout (float): The timeout for this request.
            metadata (Sequence[Tuple[str, str]]): Strings which should be
                sent along with the request as metadata.

        Returns:
            google.cloud.compute_v1.types.Operation:
                Represents an Operation resource.

                   Google Compute Engine has three Operation resources:

                   -  [Global](/compute/docs/reference/rest/{$api_version}/globalOperations)
                      \*
                      [Regional](/compute/docs/reference/rest/{$api_version}/regionOperations)
                      \*
                      [Zonal](/compute/docs/reference/rest/{$api_version}/zoneOperations)

                   You can use an operation resource to manage
                   asynchronous API requests. For more information, read
                   Handling API responses.

                   Operations can be global, regional or zonal. - For
                   global operations, use the globalOperations resource.
                   - For regional operations, use the regionOperations
                   resource. - For zonal operations, use the
                   zonalOperations resource.

                   For more information, read Global, Regional, and
                   Zonal Resources. (== resource_for
                   {$api_version}.globalOperations ==) (== resource_for
                   {$api_version}.regionOperations ==) (== resource_for
                   {$api_version}.zoneOperations ==)

        """
        # Create or coerce a protobuf request object.
        # Sanity check: If we got a request object, we should *not* have
        # gotten any keyword arguments that map to the request.
        has_flattened_params = any(
            [
                project,
                zone,
                instance_group_manager,
                instance_group_managers_abandon_instances_request_resource,
            ]
        )
        if request is not None and has_flattened_params:
            raise ValueError(
                "If the `request` argument is set, then none of "
                "the individual field arguments should be set."
            )

        # Minor optimization to avoid making a copy if the user passes
        # in a compute.AbandonInstancesInstanceGroupManagerRequest.
        # There's no risk of modifying the input as we've already verified
        # there are no flattened fields.
        if not isinstance(request, compute.AbandonInstancesInstanceGroupManagerRequest):
            request = compute.AbandonInstancesInstanceGroupManagerRequest(request)

            # If we have keyword arguments corresponding to fields on the
            # request, apply these.

            if project is not None:
                request.project = project
            if zone is not None:
                request.zone = zone
            if instance_group_manager is not None:
                request.instance_group_manager = instance_group_manager
            if instance_group_managers_abandon_instances_request_resource is not None:
                request.instance_group_managers_abandon_instances_request_resource = (
                    instance_group_managers_abandon_instances_request_resource
                )

        # Wrap the RPC method; this adds retry and timeout information,
        # and friendly error handling.
        rpc = self._transport._wrapped_methods[self._transport.abandon_instances]

        # Send the request.
        response = rpc(request, retry=retry, timeout=timeout, metadata=metadata,)

        # Done; return the response.
        return response

    def aggregated_list(
        self,
        request: compute.AggregatedListInstanceGroupManagersRequest = None,
        *,
        project: str = None,
        retry: retries.Retry = gapic_v1.method.DEFAULT,
        timeout: float = None,
        metadata: Sequence[Tuple[str, str]] = (),
    ) -> pagers.AggregatedListPager:
        r"""Retrieves the list of managed instance groups and
        groups them by zone.

        Args:
            request (google.cloud.compute_v1.types.AggregatedListInstanceGroupManagersRequest):
                The request object. A request message for
                InstanceGroupManagers.AggregatedList. See the method
                description for details.
            project (str):
                Project ID for this request.
                This corresponds to the ``project`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.

            retry (google.api_core.retry.Retry): Designation of what errors, if any,
                should be retried.
            timeout (float): The timeout for this request.
            metadata (Sequence[Tuple[str, str]]): Strings which should be
                sent along with the request as metadata.

        Returns:
            google.cloud.compute_v1.services.instance_group_managers.pagers.AggregatedListPager:
                Iterating over this object will yield
                results and resolve additional pages
                automatically.

        """
        # Create or coerce a protobuf request object.
        # Sanity check: If we got a request object, we should *not* have
        # gotten any keyword arguments that map to the request.
        has_flattened_params = any([project])
        if request is not None and has_flattened_params:
            raise ValueError(
                "If the `request` argument is set, then none of "
                "the individual field arguments should be set."
            )

        # Minor optimization to avoid making a copy if the user passes
        # in a compute.AggregatedListInstanceGroupManagersRequest.
        # There's no risk of modifying the input as we've already verified
        # there are no flattened fields.
        if not isinstance(request, compute.AggregatedListInstanceGroupManagersRequest):
            request = compute.AggregatedListInstanceGroupManagersRequest(request)

            # If we have keyword arguments corresponding to fields on the
            # request, apply these.

            if project is not None:
                request.project = project

        # Wrap the RPC method; this adds retry and timeout information,
        # and friendly error handling.
        rpc = self._transport._wrapped_methods[self._transport.aggregated_list]

        # Send the request.
        response = rpc(request, retry=retry, timeout=timeout, metadata=metadata,)

        # This method is paged; wrap the response in a pager, which provides
        # an `__iter__` convenience method.
        response = pagers.AggregatedListPager(
            method=rpc, request=request, response=response, metadata=metadata,
        )

        # Done; return the response.
        return response

    def apply_updates_to_instances(
        self,
        request: compute.ApplyUpdatesToInstancesInstanceGroupManagerRequest = None,
        *,
        project: str = None,
        zone: str = None,
        instance_group_manager: str = None,
        instance_group_managers_apply_updates_request_resource: compute.InstanceGroupManagersApplyUpdatesRequest = None,
        retry: retries.Retry = gapic_v1.method.DEFAULT,
        timeout: float = None,
        metadata: Sequence[Tuple[str, str]] = (),
    ) -> compute.Operation:
        r"""Applies changes to selected instances on the managed
        instance group. This method can be used to apply new
        overrides and/or new versions.

        Args:
            request (google.cloud.compute_v1.types.ApplyUpdatesToInstancesInstanceGroupManagerRequest):
                The request object. A request message for
                InstanceGroupManagers.ApplyUpdatesToInstances. See the
                method description for details.
            project (str):
                Project ID for this request.
                This corresponds to the ``project`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            zone (str):
                The name of the zone where the
                managed instance group is located.
                Should conform to RFC1035.

                This corresponds to the ``zone`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            instance_group_manager (str):
                The name of the managed instance
                group, should conform to RFC1035.

                This corresponds to the ``instance_group_manager`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            instance_group_managers_apply_updates_request_resource (google.cloud.compute_v1.types.InstanceGroupManagersApplyUpdatesRequest):
                The body resource for this request
                This corresponds to the ``instance_group_managers_apply_updates_request_resource`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.

            retry (google.api_core.retry.Retry): Designation of what errors, if any,
                should be retried.
            timeout (float): The timeout for this request.
            metadata (Sequence[Tuple[str, str]]): Strings which should be
                sent along with the request as metadata.

        Returns:
            google.cloud.compute_v1.types.Operation:
                Represents an Operation resource.

                   Google Compute Engine has three Operation resources:

                   -  [Global](/compute/docs/reference/rest/{$api_version}/globalOperations)
                      \*
                      [Regional](/compute/docs/reference/rest/{$api_version}/regionOperations)
                      \*
                      [Zonal](/compute/docs/reference/rest/{$api_version}/zoneOperations)

                   You can use an operation resource to manage
                   asynchronous API requests. For more information, read
                   Handling API responses.

                   Operations can be global, regional or zonal. - For
                   global operations, use the globalOperations resource.
                   - For regional operations, use the regionOperations
                   resource. - For zonal operations, use the
                   zonalOperations resource.

                   For more information, read Global, Regional, and
                   Zonal Resources. (== resource_for
                   {$api_version}.globalOperations ==) (== resource_for
                   {$api_version}.regionOperations ==) (== resource_for
                   {$api_version}.zoneOperations ==)

        """
        # Create or coerce a protobuf request object.
        # Sanity check: If we got a request object, we should *not* have
        # gotten any keyword arguments that map to the request.
        has_flattened_params = any(
            [
                project,
                zone,
                instance_group_manager,
                instance_group_managers_apply_updates_request_resource,
            ]
        )
        if request is not None and has_flattened_params:
            raise ValueError(
                "If the `request` argument is set, then none of "
                "the individual field arguments should be set."
            )

        # Minor optimization to avoid making a copy if the user passes
        # in a compute.ApplyUpdatesToInstancesInstanceGroupManagerRequest.
        # There's no risk of modifying the input as we've already verified
        # there are no flattened fields.
        if not isinstance(
            request, compute.ApplyUpdatesToInstancesInstanceGroupManagerRequest
        ):
            request = compute.ApplyUpdatesToInstancesInstanceGroupManagerRequest(
                request
            )

            # If we have keyword arguments corresponding to fields on the
            # request, apply these.

            if project is not None:
                request.project = project
            if zone is not None:
                request.zone = zone
            if instance_group_manager is not None:
                request.instance_group_manager = instance_group_manager
            if instance_group_managers_apply_updates_request_resource is not None:
                request.instance_group_managers_apply_updates_request_resource = (
                    instance_group_managers_apply_updates_request_resource
                )

        # Wrap the RPC method; this adds retry and timeout information,
        # and friendly error handling.
        rpc = self._transport._wrapped_methods[
            self._transport.apply_updates_to_instances
        ]

        # Send the request.
        response = rpc(request, retry=retry, timeout=timeout, metadata=metadata,)

        # Done; return the response.
        return response

    def create_instances(
        self,
        request: compute.CreateInstancesInstanceGroupManagerRequest = None,
        *,
        project: str = None,
        zone: str = None,
        instance_group_manager: str = None,
        instance_group_managers_create_instances_request_resource: compute.InstanceGroupManagersCreateInstancesRequest = None,
        retry: retries.Retry = gapic_v1.method.DEFAULT,
        timeout: float = None,
        metadata: Sequence[Tuple[str, str]] = (),
    ) -> compute.Operation:
        r"""Creates instances with per-instance configs in this
        managed instance group. Instances are created using the
        current instance template. The create instances
        operation is marked DONE if the createInstances request
        is successful. The underlying actions take additional
        time. You must separately verify the status of the
        creating or actions with the listmanagedinstances
        method.

        Args:
            request (google.cloud.compute_v1.types.CreateInstancesInstanceGroupManagerRequest):
                The request object. A request message for
                InstanceGroupManagers.CreateInstances. See the method
                description for details.
            project (str):
                Project ID for this request.
                This corresponds to the ``project`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            zone (str):
                The name of the zone where the
                managed instance group is located. It
                should conform to RFC1035.

                This corresponds to the ``zone`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            instance_group_manager (str):
                The name of the managed instance
                group. It should conform to RFC1035.

                This corresponds to the ``instance_group_manager`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            instance_group_managers_create_instances_request_resource (google.cloud.compute_v1.types.InstanceGroupManagersCreateInstancesRequest):
                The body resource for this request
                This corresponds to the ``instance_group_managers_create_instances_request_resource`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.

            retry (google.api_core.retry.Retry): Designation of what errors, if any,
                should be retried.
            timeout (float): The timeout for this request.
            metadata (Sequence[Tuple[str, str]]): Strings which should be
                sent along with the request as metadata.

        Returns:
            google.cloud.compute_v1.types.Operation:
                Represents an Operation resource.

                   Google Compute Engine has three Operation resources:

                   -  [Global](/compute/docs/reference/rest/{$api_version}/globalOperations)
                      \*
                      [Regional](/compute/docs/reference/rest/{$api_version}/regionOperations)
                      \*
                      [Zonal](/compute/docs/reference/rest/{$api_version}/zoneOperations)

                   You can use an operation resource to manage
                   asynchronous API requests. For more information, read
                   Handling API responses.

                   Operations can be global, regional or zonal. - For
                   global operations, use the globalOperations resource.
                   - For regional operations, use the regionOperations
                   resource. - For zonal operations, use the
                   zonalOperations resource.

                   For more information, read Global, Regional, and
                   Zonal Resources. (== resource_for
                   {$api_version}.globalOperations ==) (== resource_for
                   {$api_version}.regionOperations ==) (== resource_for
                   {$api_version}.zoneOperations ==)

        """
        # Create or coerce a protobuf request object.
        # Sanity check: If we got a request object, we should *not* have
        # gotten any keyword arguments that map to the request.
        has_flattened_params = any(
            [
                project,
                zone,
                instance_group_manager,
                instance_group_managers_create_instances_request_resource,
            ]
        )
        if request is not None and has_flattened_params:
            raise ValueError(
                "If the `request` argument is set, then none of "
                "the individual field arguments should be set."
            )

        # Minor optimization to avoid making a copy if the user passes
        # in a compute.CreateInstancesInstanceGroupManagerRequest.
        # There's no risk of modifying the input as we've already verified
        # there are no flattened fields.
        if not isinstance(request, compute.CreateInstancesInstanceGroupManagerRequest):
            request = compute.CreateInstancesInstanceGroupManagerRequest(request)

            # If we have keyword arguments corresponding to fields on the
            # request, apply these.

            if project is not None:
                request.project = project
            if zone is not None:
                request.zone = zone
            if instance_group_manager is not None:
                request.instance_group_manager = instance_group_manager
            if instance_group_managers_create_instances_request_resource is not None:
                request.instance_group_managers_create_instances_request_resource = (
                    instance_group_managers_create_instances_request_resource
                )

        # Wrap the RPC method; this adds retry and timeout information,
        # and friendly error handling.
        rpc = self._transport._wrapped_methods[self._transport.create_instances]

        # Send the request.
        response = rpc(request, retry=retry, timeout=timeout, metadata=metadata,)

        # Done; return the response.
        return response

    def delete(
        self,
        request: compute.DeleteInstanceGroupManagerRequest = None,
        *,
        project: str = None,
        zone: str = None,
        instance_group_manager: str = None,
        retry: retries.Retry = gapic_v1.method.DEFAULT,
        timeout: float = None,
        metadata: Sequence[Tuple[str, str]] = (),
    ) -> compute.Operation:
        r"""Deletes the specified managed instance group and all
        of the instances in that group. Note that the instance
        group must not belong to a backend service. Read
        Deleting an instance group for more information.

        Args:
            request (google.cloud.compute_v1.types.DeleteInstanceGroupManagerRequest):
                The request object. A request message for
                InstanceGroupManagers.Delete. See the method description
                for details.
            project (str):
                Project ID for this request.
                This corresponds to the ``project`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            zone (str):
                The name of the zone where the
                managed instance group is located.

                This corresponds to the ``zone`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            instance_group_manager (str):
                The name of the managed instance
                group to delete.

                This corresponds to the ``instance_group_manager`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.

            retry (google.api_core.retry.Retry): Designation of what errors, if any,
                should be retried.
            timeout (float): The timeout for this request.
            metadata (Sequence[Tuple[str, str]]): Strings which should be
                sent along with the request as metadata.

        Returns:
            google.cloud.compute_v1.types.Operation:
                Represents an Operation resource.

                   Google Compute Engine has three Operation resources:

                   -  [Global](/compute/docs/reference/rest/{$api_version}/globalOperations)
                      \*
                      [Regional](/compute/docs/reference/rest/{$api_version}/regionOperations)
                      \*
                      [Zonal](/compute/docs/reference/rest/{$api_version}/zoneOperations)

                   You can use an operation resource to manage
                   asynchronous API requests. For more information, read
                   Handling API responses.

                   Operations can be global, regional or zonal. - For
                   global operations, use the globalOperations resource.
                   - For regional operations, use the regionOperations
                   resource. - For zonal operations, use the
                   zonalOperations resource.

                   For more information, read Global, Regional, and
                   Zonal Resources. (== resource_for
                   {$api_version}.globalOperations ==) (== resource_for
                   {$api_version}.regionOperations ==) (== resource_for
                   {$api_version}.zoneOperations ==)

        """
        # Create or coerce a protobuf request object.
        # Sanity check: If we got a request object, we should *not* have
        # gotten any keyword arguments that map to the request.
        has_flattened_params = any([project, zone, instance_group_manager])
        if request is not None and has_flattened_params:
            raise ValueError(
                "If the `request` argument is set, then none of "
                "the individual field arguments should be set."
            )

        # Minor optimization to avoid making a copy if the user passes
        # in a compute.DeleteInstanceGroupManagerRequest.
        # There's no risk of modifying the input as we've already verified
        # there are no flattened fields.
        if not isinstance(request, compute.DeleteInstanceGroupManagerRequest):
            request = compute.DeleteInstanceGroupManagerRequest(request)

            # If we have keyword arguments corresponding to fields on the
            # request, apply these.

            if project is not None:
                request.project = project
            if zone is not None:
                request.zone = zone
            if instance_group_manager is not None:
                request.instance_group_manager = instance_group_manager

        # Wrap the RPC method; this adds retry and timeout information,
        # and friendly error handling.
        rpc = self._transport._wrapped_methods[self._transport.delete]

        # Send the request.
        response = rpc(request, retry=retry, timeout=timeout, metadata=metadata,)

        # Done; return the response.
        return response

    def delete_instances(
        self,
        request: compute.DeleteInstancesInstanceGroupManagerRequest = None,
        *,
        project: str = None,
        zone: str = None,
        instance_group_manager: str = None,
        instance_group_managers_delete_instances_request_resource: compute.InstanceGroupManagersDeleteInstancesRequest = None,
        retry: retries.Retry = gapic_v1.method.DEFAULT,
        timeout: float = None,
        metadata: Sequence[Tuple[str, str]] = (),
    ) -> compute.Operation:
        r"""Flags the specified instances in the managed instance
        group for immediate deletion. The instances are also
        removed from any target pools of which they were a
        member. This method reduces the targetSize of the
        managed instance group by the number of instances that
        you delete. This operation is marked as DONE when the
        action is scheduled even if the instances are still
        being deleted. You must separately verify the status of
        the deleting action with the listmanagedinstances
        method.  If the group is part of a backend service that
        has enabled connection draining, it can take up to 60
        seconds after the connection draining duration has
        elapsed before the VM instance is removed or deleted.
        You can specify a maximum of 1000 instances with this
        method per request.

        Args:
            request (google.cloud.compute_v1.types.DeleteInstancesInstanceGroupManagerRequest):
                The request object. A request message for
                InstanceGroupManagers.DeleteInstances. See the method
                description for details.
            project (str):
                Project ID for this request.
                This corresponds to the ``project`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            zone (str):
                The name of the zone where the
                managed instance group is located.

                This corresponds to the ``zone`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            instance_group_manager (str):
                The name of the managed instance
                group.

                This corresponds to the ``instance_group_manager`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            instance_group_managers_delete_instances_request_resource (google.cloud.compute_v1.types.InstanceGroupManagersDeleteInstancesRequest):
                The body resource for this request
                This corresponds to the ``instance_group_managers_delete_instances_request_resource`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.

            retry (google.api_core.retry.Retry): Designation of what errors, if any,
                should be retried.
            timeout (float): The timeout for this request.
            metadata (Sequence[Tuple[str, str]]): Strings which should be
                sent along with the request as metadata.

        Returns:
            google.cloud.compute_v1.types.Operation:
                Represents an Operation resource.

                   Google Compute Engine has three Operation resources:

                   -  [Global](/compute/docs/reference/rest/{$api_version}/globalOperations)
                      \*
                      [Regional](/compute/docs/reference/rest/{$api_version}/regionOperations)
                      \*
                      [Zonal](/compute/docs/reference/rest/{$api_version}/zoneOperations)

                   You can use an operation resource to manage
                   asynchronous API requests. For more information, read
                   Handling API responses.

                   Operations can be global, regional or zonal. - For
                   global operations, use the globalOperations resource.
                   - For regional operations, use the regionOperations
                   resource. - For zonal operations, use the
                   zonalOperations resource.

                   For more information, read Global, Regional, and
                   Zonal Resources. (== resource_for
                   {$api_version}.globalOperations ==) (== resource_for
                   {$api_version}.regionOperations ==) (== resource_for
                   {$api_version}.zoneOperations ==)

        """
        # Create or coerce a protobuf request object.
        # Sanity check: If we got a request object, we should *not* have
        # gotten any keyword arguments that map to the request.
        has_flattened_params = any(
            [
                project,
                zone,
                instance_group_manager,
                instance_group_managers_delete_instances_request_resource,
            ]
        )
        if request is not None and has_flattened_params:
            raise ValueError(
                "If the `request` argument is set, then none of "
                "the individual field arguments should be set."
            )

        # Minor optimization to avoid making a copy if the user passes
        # in a compute.DeleteInstancesInstanceGroupManagerRequest.
        # There's no risk of modifying the input as we've already verified
        # there are no flattened fields.
        if not isinstance(request, compute.DeleteInstancesInstanceGroupManagerRequest):
            request = compute.DeleteInstancesInstanceGroupManagerRequest(request)

            # If we have keyword arguments corresponding to fields on the
            # request, apply these.

            if project is not None:
                request.project = project
            if zone is not None:
                request.zone = zone
            if instance_group_manager is not None:
                request.instance_group_manager = instance_group_manager
            if instance_group_managers_delete_instances_request_resource is not None:
                request.instance_group_managers_delete_instances_request_resource = (
                    instance_group_managers_delete_instances_request_resource
                )

        # Wrap the RPC method; this adds retry and timeout information,
        # and friendly error handling.
        rpc = self._transport._wrapped_methods[self._transport.delete_instances]

        # Send the request.
        response = rpc(request, retry=retry, timeout=timeout, metadata=metadata,)

        # Done; return the response.
        return response

    def delete_per_instance_configs(
        self,
        request: compute.DeletePerInstanceConfigsInstanceGroupManagerRequest = None,
        *,
        project: str = None,
        zone: str = None,
        instance_group_manager: str = None,
        instance_group_managers_delete_per_instance_configs_req_resource: compute.InstanceGroupManagersDeletePerInstanceConfigsReq = None,
        retry: retries.Retry = gapic_v1.method.DEFAULT,
        timeout: float = None,
        metadata: Sequence[Tuple[str, str]] = (),
    ) -> compute.Operation:
        r"""Deletes selected per-instance configs for the managed
        instance group.

        Args:
            request (google.cloud.compute_v1.types.DeletePerInstanceConfigsInstanceGroupManagerRequest):
                The request object. A request message for
                InstanceGroupManagers.DeletePerInstanceConfigs. See the
                method description for details.
            project (str):
                Project ID for this request.
                This corresponds to the ``project`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            zone (str):
                The name of the zone where the
                managed instance group is located. It
                should conform to RFC1035.

                This corresponds to the ``zone`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            instance_group_manager (str):
                The name of the managed instance
                group. It should conform to RFC1035.

                This corresponds to the ``instance_group_manager`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            instance_group_managers_delete_per_instance_configs_req_resource (google.cloud.compute_v1.types.InstanceGroupManagersDeletePerInstanceConfigsReq):
                The body resource for this request
                This corresponds to the ``instance_group_managers_delete_per_instance_configs_req_resource`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.

            retry (google.api_core.retry.Retry): Designation of what errors, if any,
                should be retried.
            timeout (float): The timeout for this request.
            metadata (Sequence[Tuple[str, str]]): Strings which should be
                sent along with the request as metadata.

        Returns:
            google.cloud.compute_v1.types.Operation:
                Represents an Operation resource.

                   Google Compute Engine has three Operation resources:

                   -  [Global](/compute/docs/reference/rest/{$api_version}/globalOperations)
                      \*
                      [Regional](/compute/docs/reference/rest/{$api_version}/regionOperations)
                      \*
                      [Zonal](/compute/docs/reference/rest/{$api_version}/zoneOperations)

                   You can use an operation resource to manage
                   asynchronous API requests. For more information, read
                   Handling API responses.

                   Operations can be global, regional or zonal. - For
                   global operations, use the globalOperations resource.
                   - For regional operations, use the regionOperations
                   resource. - For zonal operations, use the
                   zonalOperations resource.

                   For more information, read Global, Regional, and
                   Zonal Resources. (== resource_for
                   {$api_version}.globalOperations ==) (== resource_for
                   {$api_version}.regionOperations ==) (== resource_for
                   {$api_version}.zoneOperations ==)

        """
        # Create or coerce a protobuf request object.
        # Sanity check: If we got a request object, we should *not* have
        # gotten any keyword arguments that map to the request.
        has_flattened_params = any(
            [
                project,
                zone,
                instance_group_manager,
                instance_group_managers_delete_per_instance_configs_req_resource,
            ]
        )
        if request is not None and has_flattened_params:
            raise ValueError(
                "If the `request` argument is set, then none of "
                "the individual field arguments should be set."
            )

        # Minor optimization to avoid making a copy if the user passes
        # in a compute.DeletePerInstanceConfigsInstanceGroupManagerRequest.
        # There's no risk of modifying the input as we've already verified
        # there are no flattened fields.
        if not isinstance(
            request, compute.DeletePerInstanceConfigsInstanceGroupManagerRequest
        ):
            request = compute.DeletePerInstanceConfigsInstanceGroupManagerRequest(
                request
            )

            # If we have keyword arguments corresponding to fields on the
            # request, apply these.

            if project is not None:
                request.project = project
            if zone is not None:
                request.zone = zone
            if instance_group_manager is not None:
                request.instance_group_manager = instance_group_manager
            if (
                instance_group_managers_delete_per_instance_configs_req_resource
                is not None
            ):
                request.instance_group_managers_delete_per_instance_configs_req_resource = (
                    instance_group_managers_delete_per_instance_configs_req_resource
                )

        # Wrap the RPC method; this adds retry and timeout information,
        # and friendly error handling.
        rpc = self._transport._wrapped_methods[
            self._transport.delete_per_instance_configs
        ]

        # Send the request.
        response = rpc(request, retry=retry, timeout=timeout, metadata=metadata,)

        # Done; return the response.
        return response

    def get(
        self,
        request: compute.GetInstanceGroupManagerRequest = None,
        *,
        project: str = None,
        zone: str = None,
        instance_group_manager: str = None,
        retry: retries.Retry = gapic_v1.method.DEFAULT,
        timeout: float = None,
        metadata: Sequence[Tuple[str, str]] = (),
    ) -> compute.InstanceGroupManager:
        r"""Returns all of the details about the specified
        managed instance group. Gets a list of available managed
        instance groups by making a list() request.

        Args:
            request (google.cloud.compute_v1.types.GetInstanceGroupManagerRequest):
                The request object. A request message for
                InstanceGroupManagers.Get. See the method description
                for details.
            project (str):
                Project ID for this request.
                This corresponds to the ``project`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            zone (str):
                The name of the zone where the
                managed instance group is located.

                This corresponds to the ``zone`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            instance_group_manager (str):
                The name of the managed instance
                group.

                This corresponds to the ``instance_group_manager`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.

            retry (google.api_core.retry.Retry): Designation of what errors, if any,
                should be retried.
            timeout (float): The timeout for this request.
            metadata (Sequence[Tuple[str, str]]): Strings which should be
                sent along with the request as metadata.

        Returns:
            google.cloud.compute_v1.types.InstanceGroupManager:
                Represents a Managed Instance Group resource.

                   An instance group is a collection of VM instances
                   that you can manage as a single entity. For more
                   information, read Instance groups.

                   For zonal Managed Instance Group, use the
                   instanceGroupManagers resource.

                   For regional Managed Instance Group, use the
                   regionInstanceGroupManagers resource. (==
                   resource_for {$api_version}.instanceGroupManagers ==)
                   (== resource_for
                   {$api_version}.regionInstanceGroupManagers ==)

        """
        # Create or coerce a protobuf request object.
        # Sanity check: If we got a request object, we should *not* have
        # gotten any keyword arguments that map to the request.
        has_flattened_params = any([project, zone, instance_group_manager])
        if request is not None and has_flattened_params:
            raise ValueError(
                "If the `request` argument is set, then none of "
                "the individual field arguments should be set."
            )

        # Minor optimization to avoid making a copy if the user passes
        # in a compute.GetInstanceGroupManagerRequest.
        # There's no risk of modifying the input as we've already verified
        # there are no flattened fields.
        if not isinstance(request, compute.GetInstanceGroupManagerRequest):
            request = compute.GetInstanceGroupManagerRequest(request)

            # If we have keyword arguments corresponding to fields on the
            # request, apply these.

            if project is not None:
                request.project = project
            if zone is not None:
                request.zone = zone
            if instance_group_manager is not None:
                request.instance_group_manager = instance_group_manager

        # Wrap the RPC method; this adds retry and timeout information,
        # and friendly error handling.
        rpc = self._transport._wrapped_methods[self._transport.get]

        # Send the request.
        response = rpc(request, retry=retry, timeout=timeout, metadata=metadata,)

        # Done; return the response.
        return response

    def insert(
        self,
        request: compute.InsertInstanceGroupManagerRequest = None,
        *,
        project: str = None,
        zone: str = None,
        instance_group_manager_resource: compute.InstanceGroupManager = None,
        retry: retries.Retry = gapic_v1.method.DEFAULT,
        timeout: float = None,
        metadata: Sequence[Tuple[str, str]] = (),
    ) -> compute.Operation:
        r"""Creates a managed instance group using the
        information that you specify in the request. After the
        group is created, instances in the group are created
        using the specified instance template. This operation is
        marked as DONE when the group is created even if the
        instances in the group have not yet been created. You
        must separately verify the status of the individual
        instances with the listmanagedinstances method.  A
        managed instance group can have up to 1000 VM instances
        per group. Please contact Cloud Support if you need an
        increase in this limit.

        Args:
            request (google.cloud.compute_v1.types.InsertInstanceGroupManagerRequest):
                The request object. A request message for
                InstanceGroupManagers.Insert. See the method description
                for details.
            project (str):
                Project ID for this request.
                This corresponds to the ``project`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            zone (str):
                The name of the zone where you want
                to create the managed instance group.

                This corresponds to the ``zone`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            instance_group_manager_resource (google.cloud.compute_v1.types.InstanceGroupManager):
                The body resource for this request
                This corresponds to the ``instance_group_manager_resource`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.

            retry (google.api_core.retry.Retry): Designation of what errors, if any,
                should be retried.
            timeout (float): The timeout for this request.
            metadata (Sequence[Tuple[str, str]]): Strings which should be
                sent along with the request as metadata.

        Returns:
            google.cloud.compute_v1.types.Operation:
                Represents an Operation resource.

                   Google Compute Engine has three Operation resources:

                   -  [Global](/compute/docs/reference/rest/{$api_version}/globalOperations)
                      \*
                      [Regional](/compute/docs/reference/rest/{$api_version}/regionOperations)
                      \*
                      [Zonal](/compute/docs/reference/rest/{$api_version}/zoneOperations)

                   You can use an operation resource to manage
                   asynchronous API requests. For more information, read
                   Handling API responses.

                   Operations can be global, regional or zonal. - For
                   global operations, use the globalOperations resource.
                   - For regional operations, use the regionOperations
                   resource. - For zonal operations, use the
                   zonalOperations resource.

                   For more information, read Global, Regional, and
                   Zonal Resources. (== resource_for
                   {$api_version}.globalOperations ==) (== resource_for
                   {$api_version}.regionOperations ==) (== resource_for
                   {$api_version}.zoneOperations ==)

        """
        # Create or coerce a protobuf request object.
        # Sanity check: If we got a request object, we should *not* have
        # gotten any keyword arguments that map to the request.
        has_flattened_params = any([project, zone, instance_group_manager_resource])
        if request is not None and has_flattened_params:
            raise ValueError(
                "If the `request` argument is set, then none of "
                "the individual field arguments should be set."
            )

        # Minor optimization to avoid making a copy if the user passes
        # in a compute.InsertInstanceGroupManagerRequest.
        # There's no risk of modifying the input as we've already verified
        # there are no flattened fields.
        if not isinstance(request, compute.InsertInstanceGroupManagerRequest):
            request = compute.InsertInstanceGroupManagerRequest(request)

            # If we have keyword arguments corresponding to fields on the
            # request, apply these.

            if project is not None:
                request.project = project
            if zone is not None:
                request.zone = zone
            if instance_group_manager_resource is not None:
                request.instance_group_manager_resource = (
                    instance_group_manager_resource
                )

        # Wrap the RPC method; this adds retry and timeout information,
        # and friendly error handling.
        rpc = self._transport._wrapped_methods[self._transport.insert]

        # Send the request.
        response = rpc(request, retry=retry, timeout=timeout, metadata=metadata,)

        # Done; return the response.
        return response

    def list(
        self,
        request: compute.ListInstanceGroupManagersRequest = None,
        *,
        project: str = None,
        zone: str = None,
        retry: retries.Retry = gapic_v1.method.DEFAULT,
        timeout: float = None,
        metadata: Sequence[Tuple[str, str]] = (),
    ) -> pagers.ListPager:
        r"""Retrieves a list of managed instance groups that are
        contained within the specified project and zone.

        Args:
            request (google.cloud.compute_v1.types.ListInstanceGroupManagersRequest):
                The request object. A request message for
                InstanceGroupManagers.List. See the method description
                for details.
            project (str):
                Project ID for this request.
                This corresponds to the ``project`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            zone (str):
                The name of the zone where the
                managed instance group is located.

                This corresponds to the ``zone`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.

            retry (google.api_core.retry.Retry): Designation of what errors, if any,
                should be retried.
            timeout (float): The timeout for this request.
            metadata (Sequence[Tuple[str, str]]): Strings which should be
                sent along with the request as metadata.

        Returns:
            google.cloud.compute_v1.services.instance_group_managers.pagers.ListPager:
                [Output Only] A list of managed instance groups.

                Iterating over this object will yield results and
                resolve additional pages automatically.

        """
        # Create or coerce a protobuf request object.
        # Sanity check: If we got a request object, we should *not* have
        # gotten any keyword arguments that map to the request.
        has_flattened_params = any([project, zone])
        if request is not None and has_flattened_params:
            raise ValueError(
                "If the `request` argument is set, then none of "
                "the individual field arguments should be set."
            )

        # Minor optimization to avoid making a copy if the user passes
        # in a compute.ListInstanceGroupManagersRequest.
        # There's no risk of modifying the input as we've already verified
        # there are no flattened fields.
        if not isinstance(request, compute.ListInstanceGroupManagersRequest):
            request = compute.ListInstanceGroupManagersRequest(request)

            # If we have keyword arguments corresponding to fields on the
            # request, apply these.

            if project is not None:
                request.project = project
            if zone is not None:
                request.zone = zone

        # Wrap the RPC method; this adds retry and timeout information,
        # and friendly error handling.
        rpc = self._transport._wrapped_methods[self._transport.list]

        # Send the request.
        response = rpc(request, retry=retry, timeout=timeout, metadata=metadata,)

        # This method is paged; wrap the response in a pager, which provides
        # an `__iter__` convenience method.
        response = pagers.ListPager(
            method=rpc, request=request, response=response, metadata=metadata,
        )

        # Done; return the response.
        return response

    def list_errors(
        self,
        request: compute.ListErrorsInstanceGroupManagersRequest = None,
        *,
        project: str = None,
        zone: str = None,
        instance_group_manager: str = None,
        retry: retries.Retry = gapic_v1.method.DEFAULT,
        timeout: float = None,
        metadata: Sequence[Tuple[str, str]] = (),
    ) -> pagers.ListErrorsPager:
        r"""Lists all errors thrown by actions on instances for a
        given managed instance group. The filter and orderBy
        query parameters are not supported.

        Args:
            request (google.cloud.compute_v1.types.ListErrorsInstanceGroupManagersRequest):
                The request object. A request message for
                InstanceGroupManagers.ListErrors. See the method
                description for details.
            project (str):
                Project ID for this request.
                This corresponds to the ``project`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            zone (str):
                The name of the zone where the
                managed instance group is located. It
                should conform to RFC1035.

                This corresponds to the ``zone`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            instance_group_manager (str):
                The name of the managed instance group. It must be a
                string that meets the requirements in RFC1035, or an
                unsigned long integer: must match regexp pattern:
                (?:`a-z <?:[-a-z0-9]{0,61}[a-z0-9]>`__?)|[1-9][0-9]{0,19}.

                This corresponds to the ``instance_group_manager`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.

            retry (google.api_core.retry.Retry): Designation of what errors, if any,
                should be retried.
            timeout (float): The timeout for this request.
            metadata (Sequence[Tuple[str, str]]): Strings which should be
                sent along with the request as metadata.

        Returns:
            google.cloud.compute_v1.services.instance_group_managers.pagers.ListErrorsPager:
                Iterating over this object will yield
                results and resolve additional pages
                automatically.

        """
        # Create or coerce a protobuf request object.
        # Sanity check: If we got a request object, we should *not* have
        # gotten any keyword arguments that map to the request.
        has_flattened_params = any([project, zone, instance_group_manager])
        if request is not None and has_flattened_params:
            raise ValueError(
                "If the `request` argument is set, then none of "
                "the individual field arguments should be set."
            )

        # Minor optimization to avoid making a copy if the user passes
        # in a compute.ListErrorsInstanceGroupManagersRequest.
        # There's no risk of modifying the input as we've already verified
        # there are no flattened fields.
        if not isinstance(request, compute.ListErrorsInstanceGroupManagersRequest):
            request = compute.ListErrorsInstanceGroupManagersRequest(request)

            # If we have keyword arguments corresponding to fields on the
            # request, apply these.

            if project is not None:
                request.project = project
            if zone is not None:
                request.zone = zone
            if instance_group_manager is not None:
                request.instance_group_manager = instance_group_manager

        # Wrap the RPC method; this adds retry and timeout information,
        # and friendly error handling.
        rpc = self._transport._wrapped_methods[self._transport.list_errors]

        # Send the request.
        response = rpc(request, retry=retry, timeout=timeout, metadata=metadata,)

        # This method is paged; wrap the response in a pager, which provides
        # an `__iter__` convenience method.
        response = pagers.ListErrorsPager(
            method=rpc, request=request, response=response, metadata=metadata,
        )

        # Done; return the response.
        return response

    def list_managed_instances(
        self,
        request: compute.ListManagedInstancesInstanceGroupManagersRequest = None,
        *,
        project: str = None,
        zone: str = None,
        instance_group_manager: str = None,
        retry: retries.Retry = gapic_v1.method.DEFAULT,
        timeout: float = None,
        metadata: Sequence[Tuple[str, str]] = (),
    ) -> pagers.ListManagedInstancesPager:
        r"""Lists all of the instances in the managed instance
        group. Each instance in the list has a currentAction,
        which indicates the action that the managed instance
        group is performing on the instance. For example, if the
        group is still creating an instance, the currentAction
        is CREATING. If a previous action failed, the list
        displays the errors for that failed action. The orderBy
        query parameter is not supported.

        Args:
            request (google.cloud.compute_v1.types.ListManagedInstancesInstanceGroupManagersRequest):
                The request object. A request message for
                InstanceGroupManagers.ListManagedInstances. See the
                method description for details.
            project (str):
                Project ID for this request.
                This corresponds to the ``project`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            zone (str):
                The name of the zone where the
                managed instance group is located.

                This corresponds to the ``zone`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            instance_group_manager (str):
                The name of the managed instance
                group.

                This corresponds to the ``instance_group_manager`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.

            retry (google.api_core.retry.Retry): Designation of what errors, if any,
                should be retried.
            timeout (float): The timeout for this request.
            metadata (Sequence[Tuple[str, str]]): Strings which should be
                sent along with the request as metadata.

        Returns:
            google.cloud.compute_v1.services.instance_group_managers.pagers.ListManagedInstancesPager:
                Iterating over this object will yield
                results and resolve additional pages
                automatically.

        """
        # Create or coerce a protobuf request object.
        # Sanity check: If we got a request object, we should *not* have
        # gotten any keyword arguments that map to the request.
        has_flattened_params = any([project, zone, instance_group_manager])
        if request is not None and has_flattened_params:
            raise ValueError(
                "If the `request` argument is set, then none of "
                "the individual field arguments should be set."
            )

        # Minor optimization to avoid making a copy if the user passes
        # in a compute.ListManagedInstancesInstanceGroupManagersRequest.
        # There's no risk of modifying the input as we've already verified
        # there are no flattened fields.
        if not isinstance(
            request, compute.ListManagedInstancesInstanceGroupManagersRequest
        ):
            request = compute.ListManagedInstancesInstanceGroupManagersRequest(request)

            # If we have keyword arguments corresponding to fields on the
            # request, apply these.

            if project is not None:
                request.project = project
            if zone is not None:
                request.zone = zone
            if instance_group_manager is not None:
                request.instance_group_manager = instance_group_manager

        # Wrap the RPC method; this adds retry and timeout information,
        # and friendly error handling.
        rpc = self._transport._wrapped_methods[self._transport.list_managed_instances]

        # Send the request.
        response = rpc(request, retry=retry, timeout=timeout, metadata=metadata,)

        # This method is paged; wrap the response in a pager, which provides
        # an `__iter__` convenience method.
        response = pagers.ListManagedInstancesPager(
            method=rpc, request=request, response=response, metadata=metadata,
        )

        # Done; return the response.
        return response

    def list_per_instance_configs(
        self,
        request: compute.ListPerInstanceConfigsInstanceGroupManagersRequest = None,
        *,
        project: str = None,
        zone: str = None,
        instance_group_manager: str = None,
        retry: retries.Retry = gapic_v1.method.DEFAULT,
        timeout: float = None,
        metadata: Sequence[Tuple[str, str]] = (),
    ) -> pagers.ListPerInstanceConfigsPager:
        r"""Lists all of the per-instance configs defined for the
        managed instance group. The orderBy query parameter is
        not supported.

        Args:
            request (google.cloud.compute_v1.types.ListPerInstanceConfigsInstanceGroupManagersRequest):
                The request object. A request message for
                InstanceGroupManagers.ListPerInstanceConfigs. See the
                method description for details.
            project (str):
                Project ID for this request.
                This corresponds to the ``project`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            zone (str):
                The name of the zone where the
                managed instance group is located. It
                should conform to RFC1035.

                This corresponds to the ``zone`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            instance_group_manager (str):
                The name of the managed instance
                group. It should conform to RFC1035.

                This corresponds to the ``instance_group_manager`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.

            retry (google.api_core.retry.Retry): Designation of what errors, if any,
                should be retried.
            timeout (float): The timeout for this request.
            metadata (Sequence[Tuple[str, str]]): Strings which should be
                sent along with the request as metadata.

        Returns:
            google.cloud.compute_v1.services.instance_group_managers.pagers.ListPerInstanceConfigsPager:
                Iterating over this object will yield
                results and resolve additional pages
                automatically.

        """
        # Create or coerce a protobuf request object.
        # Sanity check: If we got a request object, we should *not* have
        # gotten any keyword arguments that map to the request.
        has_flattened_params = any([project, zone, instance_group_manager])
        if request is not None and has_flattened_params:
            raise ValueError(
                "If the `request` argument is set, then none of "
                "the individual field arguments should be set."
            )

        # Minor optimization to avoid making a copy if the user passes
        # in a compute.ListPerInstanceConfigsInstanceGroupManagersRequest.
        # There's no risk of modifying the input as we've already verified
        # there are no flattened fields.
        if not isinstance(
            request, compute.ListPerInstanceConfigsInstanceGroupManagersRequest
        ):
            request = compute.ListPerInstanceConfigsInstanceGroupManagersRequest(
                request
            )

            # If we have keyword arguments corresponding to fields on the
            # request, apply these.

            if project is not None:
                request.project = project
            if zone is not None:
                request.zone = zone
            if instance_group_manager is not None:
                request.instance_group_manager = instance_group_manager

        # Wrap the RPC method; this adds retry and timeout information,
        # and friendly error handling.
        rpc = self._transport._wrapped_methods[
            self._transport.list_per_instance_configs
        ]

        # Send the request.
        response = rpc(request, retry=retry, timeout=timeout, metadata=metadata,)

        # This method is paged; wrap the response in a pager, which provides
        # an `__iter__` convenience method.
        response = pagers.ListPerInstanceConfigsPager(
            method=rpc, request=request, response=response, metadata=metadata,
        )

        # Done; return the response.
        return response

    def patch(
        self,
        request: compute.PatchInstanceGroupManagerRequest = None,
        *,
        project: str = None,
        zone: str = None,
        instance_group_manager: str = None,
        instance_group_manager_resource: compute.InstanceGroupManager = None,
        retry: retries.Retry = gapic_v1.method.DEFAULT,
        timeout: float = None,
        metadata: Sequence[Tuple[str, str]] = (),
    ) -> compute.Operation:
        r"""Updates a managed instance group using the
        information that you specify in the request. This
        operation is marked as DONE when the group is patched
        even if the instances in the group are still in the
        process of being patched. You must separately verify the
        status of the individual instances with the
        listManagedInstances method. This method supports PATCH
        semantics and uses the JSON merge patch format and
        processing rules.

        Args:
            request (google.cloud.compute_v1.types.PatchInstanceGroupManagerRequest):
                The request object. A request message for
                InstanceGroupManagers.Patch. See the method description
                for details.
            project (str):
                Project ID for this request.
                This corresponds to the ``project`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            zone (str):
                The name of the zone where you want
                to create the managed instance group.

                This corresponds to the ``zone`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            instance_group_manager (str):
                The name of the instance group
                manager.

                This corresponds to the ``instance_group_manager`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            instance_group_manager_resource (google.cloud.compute_v1.types.InstanceGroupManager):
                The body resource for this request
                This corresponds to the ``instance_group_manager_resource`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.

            retry (google.api_core.retry.Retry): Designation of what errors, if any,
                should be retried.
            timeout (float): The timeout for this request.
            metadata (Sequence[Tuple[str, str]]): Strings which should be
                sent along with the request as metadata.

        Returns:
            google.cloud.compute_v1.types.Operation:
                Represents an Operation resource.

                   Google Compute Engine has three Operation resources:

                   -  [Global](/compute/docs/reference/rest/{$api_version}/globalOperations)
                      \*
                      [Regional](/compute/docs/reference/rest/{$api_version}/regionOperations)
                      \*
                      [Zonal](/compute/docs/reference/rest/{$api_version}/zoneOperations)

                   You can use an operation resource to manage
                   asynchronous API requests. For more information, read
                   Handling API responses.

                   Operations can be global, regional or zonal. - For
                   global operations, use the globalOperations resource.
                   - For regional operations, use the regionOperations
                   resource. - For zonal operations, use the
                   zonalOperations resource.

                   For more information, read Global, Regional, and
                   Zonal Resources. (== resource_for
                   {$api_version}.globalOperations ==) (== resource_for
                   {$api_version}.regionOperations ==) (== resource_for
                   {$api_version}.zoneOperations ==)

        """
        # Create or coerce a protobuf request object.
        # Sanity check: If we got a request object, we should *not* have
        # gotten any keyword arguments that map to the request.
        has_flattened_params = any(
            [project, zone, instance_group_manager, instance_group_manager_resource]
        )
        if request is not None and has_flattened_params:
            raise ValueError(
                "If the `request` argument is set, then none of "
                "the individual field arguments should be set."
            )

        # Minor optimization to avoid making a copy if the user passes
        # in a compute.PatchInstanceGroupManagerRequest.
        # There's no risk of modifying the input as we've already verified
        # there are no flattened fields.
        if not isinstance(request, compute.PatchInstanceGroupManagerRequest):
            request = compute.PatchInstanceGroupManagerRequest(request)

            # If we have keyword arguments corresponding to fields on the
            # request, apply these.

            if project is not None:
                request.project = project
            if zone is not None:
                request.zone = zone
            if instance_group_manager is not None:
                request.instance_group_manager = instance_group_manager
            if instance_group_manager_resource is not None:
                request.instance_group_manager_resource = (
                    instance_group_manager_resource
                )

        # Wrap the RPC method; this adds retry and timeout information,
        # and friendly error handling.
        rpc = self._transport._wrapped_methods[self._transport.patch]

        # Send the request.
        response = rpc(request, retry=retry, timeout=timeout, metadata=metadata,)

        # Done; return the response.
        return response

    def patch_per_instance_configs(
        self,
        request: compute.PatchPerInstanceConfigsInstanceGroupManagerRequest = None,
        *,
        project: str = None,
        zone: str = None,
        instance_group_manager: str = None,
        instance_group_managers_patch_per_instance_configs_req_resource: compute.InstanceGroupManagersPatchPerInstanceConfigsReq = None,
        retry: retries.Retry = gapic_v1.method.DEFAULT,
        timeout: float = None,
        metadata: Sequence[Tuple[str, str]] = (),
    ) -> compute.Operation:
        r"""Inserts or patches per-instance configs for the
        managed instance group. perInstanceConfig.name serves as
        a key used to distinguish whether to perform insert or
        patch.

        Args:
            request (google.cloud.compute_v1.types.PatchPerInstanceConfigsInstanceGroupManagerRequest):
                The request object. A request message for
                InstanceGroupManagers.PatchPerInstanceConfigs. See the
                method description for details.
            project (str):
                Project ID for this request.
                This corresponds to the ``project`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            zone (str):
                The name of the zone where the
                managed instance group is located. It
                should conform to RFC1035.

                This corresponds to the ``zone`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            instance_group_manager (str):
                The name of the managed instance
                group. It should conform to RFC1035.

                This corresponds to the ``instance_group_manager`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            instance_group_managers_patch_per_instance_configs_req_resource (google.cloud.compute_v1.types.InstanceGroupManagersPatchPerInstanceConfigsReq):
                The body resource for this request
                This corresponds to the ``instance_group_managers_patch_per_instance_configs_req_resource`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.

            retry (google.api_core.retry.Retry): Designation of what errors, if any,
                should be retried.
            timeout (float): The timeout for this request.
            metadata (Sequence[Tuple[str, str]]): Strings which should be
                sent along with the request as metadata.

        Returns:
            google.cloud.compute_v1.types.Operation:
                Represents an Operation resource.

                   Google Compute Engine has three Operation resources:

                   -  [Global](/compute/docs/reference/rest/{$api_version}/globalOperations)
                      \*
                      [Regional](/compute/docs/reference/rest/{$api_version}/regionOperations)
                      \*
                      [Zonal](/compute/docs/reference/rest/{$api_version}/zoneOperations)

                   You can use an operation resource to manage
                   asynchronous API requests. For more information, read
                   Handling API responses.

                   Operations can be global, regional or zonal. - For
                   global operations, use the globalOperations resource.
                   - For regional operations, use the regionOperations
                   resource. - For zonal operations, use the
                   zonalOperations resource.

                   For more information, read Global, Regional, and
                   Zonal Resources. (== resource_for
                   {$api_version}.globalOperations ==) (== resource_for
                   {$api_version}.regionOperations ==) (== resource_for
                   {$api_version}.zoneOperations ==)

        """
        # Create or coerce a protobuf request object.
        # Sanity check: If we got a request object, we should *not* have
        # gotten any keyword arguments that map to the request.
        has_flattened_params = any(
            [
                project,
                zone,
                instance_group_manager,
                instance_group_managers_patch_per_instance_configs_req_resource,
            ]
        )
        if request is not None and has_flattened_params:
            raise ValueError(
                "If the `request` argument is set, then none of "
                "the individual field arguments should be set."
            )

        # Minor optimization to avoid making a copy if the user passes
        # in a compute.PatchPerInstanceConfigsInstanceGroupManagerRequest.
        # There's no risk of modifying the input as we've already verified
        # there are no flattened fields.
        if not isinstance(
            request, compute.PatchPerInstanceConfigsInstanceGroupManagerRequest
        ):
            request = compute.PatchPerInstanceConfigsInstanceGroupManagerRequest(
                request
            )

            # If we have keyword arguments corresponding to fields on the
            # request, apply these.

            if project is not None:
                request.project = project
            if zone is not None:
                request.zone = zone
            if instance_group_manager is not None:
                request.instance_group_manager = instance_group_manager
            if (
                instance_group_managers_patch_per_instance_configs_req_resource
                is not None
            ):
                request.instance_group_managers_patch_per_instance_configs_req_resource = (
                    instance_group_managers_patch_per_instance_configs_req_resource
                )

        # Wrap the RPC method; this adds retry and timeout information,
        # and friendly error handling.
        rpc = self._transport._wrapped_methods[
            self._transport.patch_per_instance_configs
        ]

        # Send the request.
        response = rpc(request, retry=retry, timeout=timeout, metadata=metadata,)

        # Done; return the response.
        return response

    def recreate_instances(
        self,
        request: compute.RecreateInstancesInstanceGroupManagerRequest = None,
        *,
        project: str = None,
        zone: str = None,
        instance_group_manager: str = None,
        instance_group_managers_recreate_instances_request_resource: compute.InstanceGroupManagersRecreateInstancesRequest = None,
        retry: retries.Retry = gapic_v1.method.DEFAULT,
        timeout: float = None,
        metadata: Sequence[Tuple[str, str]] = (),
    ) -> compute.Operation:
        r"""Flags the specified instances in the managed instance
        group to be immediately recreated. The instances are
        deleted and recreated using the current instance
        template for the managed instance group. This operation
        is marked as DONE when the flag is set even if the
        instances have not yet been recreated. You must
        separately verify the status of the recreating action
        with the listmanagedinstances method.  If the group is
        part of a backend service that has enabled connection
        draining, it can take up to 60 seconds after the
        connection draining duration has elapsed before the VM
        instance is removed or deleted.
        You can specify a maximum of 1000 instances with this
        method per request.

        Args:
            request (google.cloud.compute_v1.types.RecreateInstancesInstanceGroupManagerRequest):
                The request object. A request message for
                InstanceGroupManagers.RecreateInstances. See the method
                description for details.
            project (str):
                Project ID for this request.
                This corresponds to the ``project`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            zone (str):
                The name of the zone where the
                managed instance group is located.

                This corresponds to the ``zone`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            instance_group_manager (str):
                The name of the managed instance
                group.

                This corresponds to the ``instance_group_manager`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            instance_group_managers_recreate_instances_request_resource (google.cloud.compute_v1.types.InstanceGroupManagersRecreateInstancesRequest):
                The body resource for this request
                This corresponds to the ``instance_group_managers_recreate_instances_request_resource`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.

            retry (google.api_core.retry.Retry): Designation of what errors, if any,
                should be retried.
            timeout (float): The timeout for this request.
            metadata (Sequence[Tuple[str, str]]): Strings which should be
                sent along with the request as metadata.

        Returns:
            google.cloud.compute_v1.types.Operation:
                Represents an Operation resource.

                   Google Compute Engine has three Operation resources:

                   -  [Global](/compute/docs/reference/rest/{$api_version}/globalOperations)
                      \*
                      [Regional](/compute/docs/reference/rest/{$api_version}/regionOperations)
                      \*
                      [Zonal](/compute/docs/reference/rest/{$api_version}/zoneOperations)

                   You can use an operation resource to manage
                   asynchronous API requests. For more information, read
                   Handling API responses.

                   Operations can be global, regional or zonal. - For
                   global operations, use the globalOperations resource.
                   - For regional operations, use the regionOperations
                   resource. - For zonal operations, use the
                   zonalOperations resource.

                   For more information, read Global, Regional, and
                   Zonal Resources. (== resource_for
                   {$api_version}.globalOperations ==) (== resource_for
                   {$api_version}.regionOperations ==) (== resource_for
                   {$api_version}.zoneOperations ==)

        """
        # Create or coerce a protobuf request object.
        # Sanity check: If we got a request object, we should *not* have
        # gotten any keyword arguments that map to the request.
        has_flattened_params = any(
            [
                project,
                zone,
                instance_group_manager,
                instance_group_managers_recreate_instances_request_resource,
            ]
        )
        if request is not None and has_flattened_params:
            raise ValueError(
                "If the `request` argument is set, then none of "
                "the individual field arguments should be set."
            )

        # Minor optimization to avoid making a copy if the user passes
        # in a compute.RecreateInstancesInstanceGroupManagerRequest.
        # There's no risk of modifying the input as we've already verified
        # there are no flattened fields.
        if not isinstance(
            request, compute.RecreateInstancesInstanceGroupManagerRequest
        ):
            request = compute.RecreateInstancesInstanceGroupManagerRequest(request)

            # If we have keyword arguments corresponding to fields on the
            # request, apply these.

            if project is not None:
                request.project = project
            if zone is not None:
                request.zone = zone
            if instance_group_manager is not None:
                request.instance_group_manager = instance_group_manager
            if instance_group_managers_recreate_instances_request_resource is not None:
                request.instance_group_managers_recreate_instances_request_resource = (
                    instance_group_managers_recreate_instances_request_resource
                )

        # Wrap the RPC method; this adds retry and timeout information,
        # and friendly error handling.
        rpc = self._transport._wrapped_methods[self._transport.recreate_instances]

        # Send the request.
        response = rpc(request, retry=retry, timeout=timeout, metadata=metadata,)

        # Done; return the response.
        return response

    def resize(
        self,
        request: compute.ResizeInstanceGroupManagerRequest = None,
        *,
        project: str = None,
        zone: str = None,
        instance_group_manager: str = None,
        size: int = None,
        retry: retries.Retry = gapic_v1.method.DEFAULT,
        timeout: float = None,
        metadata: Sequence[Tuple[str, str]] = (),
    ) -> compute.Operation:
        r"""Resizes the managed instance group. If you increase
        the size, the group creates new instances using the
        current instance template. If you decrease the size, the
        group deletes instances. The resize operation is marked
        DONE when the resize actions are scheduled even if the
        group has not yet added or deleted any instances. You
        must separately verify the status of the creating or
        deleting actions with the listmanagedinstances method.
        When resizing down, the instance group arbitrarily
        chooses the order in which VMs are deleted. The group
        takes into account some VM attributes when making the
        selection including:
        + The status of the VM instance. + The health of the VM
        instance. + The instance template version the VM is
        based on. + For regional managed instance groups, the
        location of the VM instance.
        This list is subject to change.

        If the group is part of a backend service that has
        enabled connection draining, it can take up to 60
        seconds after the connection draining duration has
        elapsed before the VM instance is removed or deleted.

        Args:
            request (google.cloud.compute_v1.types.ResizeInstanceGroupManagerRequest):
                The request object. A request message for
                InstanceGroupManagers.Resize. See the method description
                for details.
            project (str):
                Project ID for this request.
                This corresponds to the ``project`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            zone (str):
                The name of the zone where the
                managed instance group is located.

                This corresponds to the ``zone`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            instance_group_manager (str):
                The name of the managed instance
                group.

                This corresponds to the ``instance_group_manager`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            size (int):
                The number of running instances that
                the managed instance group should
                maintain at any given time. The group
                automatically adds or removes instances
                to maintain the number of instances
                specified by this parameter.

                This corresponds to the ``size`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.

            retry (google.api_core.retry.Retry): Designation of what errors, if any,
                should be retried.
            timeout (float): The timeout for this request.
            metadata (Sequence[Tuple[str, str]]): Strings which should be
                sent along with the request as metadata.

        Returns:
            google.cloud.compute_v1.types.Operation:
                Represents an Operation resource.

                   Google Compute Engine has three Operation resources:

                   -  [Global](/compute/docs/reference/rest/{$api_version}/globalOperations)
                      \*
                      [Regional](/compute/docs/reference/rest/{$api_version}/regionOperations)
                      \*
                      [Zonal](/compute/docs/reference/rest/{$api_version}/zoneOperations)

                   You can use an operation resource to manage
                   asynchronous API requests. For more information, read
                   Handling API responses.

                   Operations can be global, regional or zonal. - For
                   global operations, use the globalOperations resource.
                   - For regional operations, use the regionOperations
                   resource. - For zonal operations, use the
                   zonalOperations resource.

                   For more information, read Global, Regional, and
                   Zonal Resources. (== resource_for
                   {$api_version}.globalOperations ==) (== resource_for
                   {$api_version}.regionOperations ==) (== resource_for
                   {$api_version}.zoneOperations ==)

        """
        # Create or coerce a protobuf request object.
        # Sanity check: If we got a request object, we should *not* have
        # gotten any keyword arguments that map to the request.
        has_flattened_params = any([project, zone, instance_group_manager, size])
        if request is not None and has_flattened_params:
            raise ValueError(
                "If the `request` argument is set, then none of "
                "the individual field arguments should be set."
            )

        # Minor optimization to avoid making a copy if the user passes
        # in a compute.ResizeInstanceGroupManagerRequest.
        # There's no risk of modifying the input as we've already verified
        # there are no flattened fields.
        if not isinstance(request, compute.ResizeInstanceGroupManagerRequest):
            request = compute.ResizeInstanceGroupManagerRequest(request)

            # If we have keyword arguments corresponding to fields on the
            # request, apply these.

            if project is not None:
                request.project = project
            if zone is not None:
                request.zone = zone
            if instance_group_manager is not None:
                request.instance_group_manager = instance_group_manager
            if size is not None:
                request.size = size

        # Wrap the RPC method; this adds retry and timeout information,
        # and friendly error handling.
        rpc = self._transport._wrapped_methods[self._transport.resize]

        # Send the request.
        response = rpc(request, retry=retry, timeout=timeout, metadata=metadata,)

        # Done; return the response.
        return response

    def set_instance_template(
        self,
        request: compute.SetInstanceTemplateInstanceGroupManagerRequest = None,
        *,
        project: str = None,
        zone: str = None,
        instance_group_manager: str = None,
        instance_group_managers_set_instance_template_request_resource: compute.InstanceGroupManagersSetInstanceTemplateRequest = None,
        retry: retries.Retry = gapic_v1.method.DEFAULT,
        timeout: float = None,
        metadata: Sequence[Tuple[str, str]] = (),
    ) -> compute.Operation:
        r"""Specifies the instance template to use when creating
        new instances in this group. The templates for existing
        instances in the group do not change unless you run
        recreateInstances, run applyUpdatesToInstances, or set
        the group's updatePolicy.type to PROACTIVE.

        Args:
            request (google.cloud.compute_v1.types.SetInstanceTemplateInstanceGroupManagerRequest):
                The request object. A request message for
                InstanceGroupManagers.SetInstanceTemplate. See the
                method description for details.
            project (str):
                Project ID for this request.
                This corresponds to the ``project`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            zone (str):
                The name of the zone where the
                managed instance group is located.

                This corresponds to the ``zone`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            instance_group_manager (str):
                The name of the managed instance
                group.

                This corresponds to the ``instance_group_manager`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            instance_group_managers_set_instance_template_request_resource (google.cloud.compute_v1.types.InstanceGroupManagersSetInstanceTemplateRequest):
                The body resource for this request
                This corresponds to the ``instance_group_managers_set_instance_template_request_resource`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.

            retry (google.api_core.retry.Retry): Designation of what errors, if any,
                should be retried.
            timeout (float): The timeout for this request.
            metadata (Sequence[Tuple[str, str]]): Strings which should be
                sent along with the request as metadata.

        Returns:
            google.cloud.compute_v1.types.Operation:
                Represents an Operation resource.

                   Google Compute Engine has three Operation resources:

                   -  [Global](/compute/docs/reference/rest/{$api_version}/globalOperations)
                      \*
                      [Regional](/compute/docs/reference/rest/{$api_version}/regionOperations)
                      \*
                      [Zonal](/compute/docs/reference/rest/{$api_version}/zoneOperations)

                   You can use an operation resource to manage
                   asynchronous API requests. For more information, read
                   Handling API responses.

                   Operations can be global, regional or zonal. - For
                   global operations, use the globalOperations resource.
                   - For regional operations, use the regionOperations
                   resource. - For zonal operations, use the
                   zonalOperations resource.

                   For more information, read Global, Regional, and
                   Zonal Resources. (== resource_for
                   {$api_version}.globalOperations ==) (== resource_for
                   {$api_version}.regionOperations ==) (== resource_for
                   {$api_version}.zoneOperations ==)

        """
        # Create or coerce a protobuf request object.
        # Sanity check: If we got a request object, we should *not* have
        # gotten any keyword arguments that map to the request.
        has_flattened_params = any(
            [
                project,
                zone,
                instance_group_manager,
                instance_group_managers_set_instance_template_request_resource,
            ]
        )
        if request is not None and has_flattened_params:
            raise ValueError(
                "If the `request` argument is set, then none of "
                "the individual field arguments should be set."
            )

        # Minor optimization to avoid making a copy if the user passes
        # in a compute.SetInstanceTemplateInstanceGroupManagerRequest.
        # There's no risk of modifying the input as we've already verified
        # there are no flattened fields.
        if not isinstance(
            request, compute.SetInstanceTemplateInstanceGroupManagerRequest
        ):
            request = compute.SetInstanceTemplateInstanceGroupManagerRequest(request)

            # If we have keyword arguments corresponding to fields on the
            # request, apply these.

            if project is not None:
                request.project = project
            if zone is not None:
                request.zone = zone
            if instance_group_manager is not None:
                request.instance_group_manager = instance_group_manager
            if (
                instance_group_managers_set_instance_template_request_resource
                is not None
            ):
                request.instance_group_managers_set_instance_template_request_resource = (
                    instance_group_managers_set_instance_template_request_resource
                )

        # Wrap the RPC method; this adds retry and timeout information,
        # and friendly error handling.
        rpc = self._transport._wrapped_methods[self._transport.set_instance_template]

        # Send the request.
        response = rpc(request, retry=retry, timeout=timeout, metadata=metadata,)

        # Done; return the response.
        return response

    def set_target_pools(
        self,
        request: compute.SetTargetPoolsInstanceGroupManagerRequest = None,
        *,
        project: str = None,
        zone: str = None,
        instance_group_manager: str = None,
        instance_group_managers_set_target_pools_request_resource: compute.InstanceGroupManagersSetTargetPoolsRequest = None,
        retry: retries.Retry = gapic_v1.method.DEFAULT,
        timeout: float = None,
        metadata: Sequence[Tuple[str, str]] = (),
    ) -> compute.Operation:
        r"""Modifies the target pools to which all instances in
        this managed instance group are assigned. The target
        pools automatically apply to all of the instances in the
        managed instance group. This operation is marked DONE
        when you make the request even if the instances have not
        yet been added to their target pools. The change might
        take some time to apply to all of the instances in the
        group depending on the size of the group.

        Args:
            request (google.cloud.compute_v1.types.SetTargetPoolsInstanceGroupManagerRequest):
                The request object. A request message for
                InstanceGroupManagers.SetTargetPools. See the method
                description for details.
            project (str):
                Project ID for this request.
                This corresponds to the ``project`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            zone (str):
                The name of the zone where the
                managed instance group is located.

                This corresponds to the ``zone`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            instance_group_manager (str):
                The name of the managed instance
                group.

                This corresponds to the ``instance_group_manager`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            instance_group_managers_set_target_pools_request_resource (google.cloud.compute_v1.types.InstanceGroupManagersSetTargetPoolsRequest):
                The body resource for this request
                This corresponds to the ``instance_group_managers_set_target_pools_request_resource`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.

            retry (google.api_core.retry.Retry): Designation of what errors, if any,
                should be retried.
            timeout (float): The timeout for this request.
            metadata (Sequence[Tuple[str, str]]): Strings which should be
                sent along with the request as metadata.

        Returns:
            google.cloud.compute_v1.types.Operation:
                Represents an Operation resource.

                   Google Compute Engine has three Operation resources:

                   -  [Global](/compute/docs/reference/rest/{$api_version}/globalOperations)
                      \*
                      [Regional](/compute/docs/reference/rest/{$api_version}/regionOperations)
                      \*
                      [Zonal](/compute/docs/reference/rest/{$api_version}/zoneOperations)

                   You can use an operation resource to manage
                   asynchronous API requests. For more information, read
                   Handling API responses.

                   Operations can be global, regional or zonal. - For
                   global operations, use the globalOperations resource.
                   - For regional operations, use the regionOperations
                   resource. - For zonal operations, use the
                   zonalOperations resource.

                   For more information, read Global, Regional, and
                   Zonal Resources. (== resource_for
                   {$api_version}.globalOperations ==) (== resource_for
                   {$api_version}.regionOperations ==) (== resource_for
                   {$api_version}.zoneOperations ==)

        """
        # Create or coerce a protobuf request object.
        # Sanity check: If we got a request object, we should *not* have
        # gotten any keyword arguments that map to the request.
        has_flattened_params = any(
            [
                project,
                zone,
                instance_group_manager,
                instance_group_managers_set_target_pools_request_resource,
            ]
        )
        if request is not None and has_flattened_params:
            raise ValueError(
                "If the `request` argument is set, then none of "
                "the individual field arguments should be set."
            )

        # Minor optimization to avoid making a copy if the user passes
        # in a compute.SetTargetPoolsInstanceGroupManagerRequest.
        # There's no risk of modifying the input as we've already verified
        # there are no flattened fields.
        if not isinstance(request, compute.SetTargetPoolsInstanceGroupManagerRequest):
            request = compute.SetTargetPoolsInstanceGroupManagerRequest(request)

            # If we have keyword arguments corresponding to fields on the
            # request, apply these.

            if project is not None:
                request.project = project
            if zone is not None:
                request.zone = zone
            if instance_group_manager is not None:
                request.instance_group_manager = instance_group_manager
            if instance_group_managers_set_target_pools_request_resource is not None:
                request.instance_group_managers_set_target_pools_request_resource = (
                    instance_group_managers_set_target_pools_request_resource
                )

        # Wrap the RPC method; this adds retry and timeout information,
        # and friendly error handling.
        rpc = self._transport._wrapped_methods[self._transport.set_target_pools]

        # Send the request.
        response = rpc(request, retry=retry, timeout=timeout, metadata=metadata,)

        # Done; return the response.
        return response

    def update_per_instance_configs(
        self,
        request: compute.UpdatePerInstanceConfigsInstanceGroupManagerRequest = None,
        *,
        project: str = None,
        zone: str = None,
        instance_group_manager: str = None,
        instance_group_managers_update_per_instance_configs_req_resource: compute.InstanceGroupManagersUpdatePerInstanceConfigsReq = None,
        retry: retries.Retry = gapic_v1.method.DEFAULT,
        timeout: float = None,
        metadata: Sequence[Tuple[str, str]] = (),
    ) -> compute.Operation:
        r"""Inserts or updates per-instance configs for the
        managed instance group. perInstanceConfig.name serves as
        a key used to distinguish whether to perform insert or
        patch.

        Args:
            request (google.cloud.compute_v1.types.UpdatePerInstanceConfigsInstanceGroupManagerRequest):
                The request object. A request message for
                InstanceGroupManagers.UpdatePerInstanceConfigs. See the
                method description for details.
            project (str):
                Project ID for this request.
                This corresponds to the ``project`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            zone (str):
                The name of the zone where the
                managed instance group is located. It
                should conform to RFC1035.

                This corresponds to the ``zone`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            instance_group_manager (str):
                The name of the managed instance
                group. It should conform to RFC1035.

                This corresponds to the ``instance_group_manager`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.
            instance_group_managers_update_per_instance_configs_req_resource (google.cloud.compute_v1.types.InstanceGroupManagersUpdatePerInstanceConfigsReq):
                The body resource for this request
                This corresponds to the ``instance_group_managers_update_per_instance_configs_req_resource`` field
                on the ``request`` instance; if ``request`` is provided, this
                should not be set.

            retry (google.api_core.retry.Retry): Designation of what errors, if any,
                should be retried.
            timeout (float): The timeout for this request.
            metadata (Sequence[Tuple[str, str]]): Strings which should be
                sent along with the request as metadata.

        Returns:
            google.cloud.compute_v1.types.Operation:
                Represents an Operation resource.

                   Google Compute Engine has three Operation resources:

                   -  [Global](/compute/docs/reference/rest/{$api_version}/globalOperations)
                      \*
                      [Regional](/compute/docs/reference/rest/{$api_version}/regionOperations)
                      \*
                      [Zonal](/compute/docs/reference/rest/{$api_version}/zoneOperations)

                   You can use an operation resource to manage
                   asynchronous API requests. For more information, read
                   Handling API responses.

                   Operations can be global, regional or zonal. - For
                   global operations, use the globalOperations resource.
                   - For regional operations, use the regionOperations
                   resource. - For zonal operations, use the
                   zonalOperations resource.

                   For more information, read Global, Regional, and
                   Zonal Resources. (== resource_for
                   {$api_version}.globalOperations ==) (== resource_for
                   {$api_version}.regionOperations ==) (== resource_for
                   {$api_version}.zoneOperations ==)

        """
        # Create or coerce a protobuf request object.
        # Sanity check: If we got a request object, we should *not* have
        # gotten any keyword arguments that map to the request.
        has_flattened_params = any(
            [
                project,
                zone,
                instance_group_manager,
                instance_group_managers_update_per_instance_configs_req_resource,
            ]
        )
        if request is not None and has_flattened_params:
            raise ValueError(
                "If the `request` argument is set, then none of "
                "the individual field arguments should be set."
            )

        # Minor optimization to avoid making a copy if the user passes
        # in a compute.UpdatePerInstanceConfigsInstanceGroupManagerRequest.
        # There's no risk of modifying the input as we've already verified
        # there are no flattened fields.
        if not isinstance(
            request, compute.UpdatePerInstanceConfigsInstanceGroupManagerRequest
        ):
            request = compute.UpdatePerInstanceConfigsInstanceGroupManagerRequest(
                request
            )

            # If we have keyword arguments corresponding to fields on the
            # request, apply these.

            if project is not None:
                request.project = project
            if zone is not None:
                request.zone = zone
            if instance_group_manager is not None:
                request.instance_group_manager = instance_group_manager
            if (
                instance_group_managers_update_per_instance_configs_req_resource
                is not None
            ):
                request.instance_group_managers_update_per_instance_configs_req_resource = (
                    instance_group_managers_update_per_instance_configs_req_resource
                )

        # Wrap the RPC method; this adds retry and timeout information,
        # and friendly error handling.
        rpc = self._transport._wrapped_methods[
            self._transport.update_per_instance_configs
        ]

        # Send the request.
        response = rpc(request, retry=retry, timeout=timeout, metadata=metadata,)

        # Done; return the response.
        return response


try:
    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
        gapic_version=pkg_resources.get_distribution("google-cloud-compute",).version,
    )
except pkg_resources.DistributionNotFound:
    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo()


__all__ = ("InstanceGroupManagersClient",)
