// Copyright 2025 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// Code generated by protoc-gen-go_gapic. DO NOT EDIT.

package aiplatform

import (
	"context"
	"fmt"
	"log/slog"
	"math"
	"net/url"

	aiplatformpb "cloud.google.com/go/aiplatform/apiv1/aiplatformpb"
	iampb "cloud.google.com/go/iam/apiv1/iampb"
	"cloud.google.com/go/longrunning"
	lroauto "cloud.google.com/go/longrunning/autogen"
	longrunningpb "cloud.google.com/go/longrunning/autogen/longrunningpb"
	gax "github.com/googleapis/gax-go/v2"
	"google.golang.org/api/iterator"
	"google.golang.org/api/option"
	"google.golang.org/api/option/internaloption"
	gtransport "google.golang.org/api/transport/grpc"
	locationpb "google.golang.org/genproto/googleapis/cloud/location"
	"google.golang.org/grpc"
	"google.golang.org/protobuf/proto"
)

var newEndpointClientHook clientHook

// EndpointCallOptions contains the retry settings for each method of EndpointClient.
type EndpointCallOptions struct {
	CreateEndpoint            []gax.CallOption
	GetEndpoint               []gax.CallOption
	ListEndpoints             []gax.CallOption
	UpdateEndpoint            []gax.CallOption
	UpdateEndpointLongRunning []gax.CallOption
	DeleteEndpoint            []gax.CallOption
	DeployModel               []gax.CallOption
	UndeployModel             []gax.CallOption
	MutateDeployedModel       []gax.CallOption
	GetLocation               []gax.CallOption
	ListLocations             []gax.CallOption
	GetIamPolicy              []gax.CallOption
	SetIamPolicy              []gax.CallOption
	TestIamPermissions        []gax.CallOption
	CancelOperation           []gax.CallOption
	DeleteOperation           []gax.CallOption
	GetOperation              []gax.CallOption
	ListOperations            []gax.CallOption
	WaitOperation             []gax.CallOption
}

func defaultEndpointGRPCClientOptions() []option.ClientOption {
	return []option.ClientOption{
		internaloption.WithDefaultEndpoint("aiplatform.googleapis.com:443"),
		internaloption.WithDefaultEndpointTemplate("aiplatform.UNIVERSE_DOMAIN:443"),
		internaloption.WithDefaultMTLSEndpoint("aiplatform.mtls.googleapis.com:443"),
		internaloption.WithDefaultUniverseDomain("googleapis.com"),
		internaloption.WithDefaultAudience("https://aiplatform.googleapis.com/"),
		internaloption.WithDefaultScopes(DefaultAuthScopes()...),
		internaloption.EnableJwtWithScope(),
		internaloption.EnableNewAuthLibrary(),
		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
			grpc.MaxCallRecvMsgSize(math.MaxInt32))),
	}
}

func defaultEndpointCallOptions() *EndpointCallOptions {
	return &EndpointCallOptions{
		CreateEndpoint:            []gax.CallOption{},
		GetEndpoint:               []gax.CallOption{},
		ListEndpoints:             []gax.CallOption{},
		UpdateEndpoint:            []gax.CallOption{},
		UpdateEndpointLongRunning: []gax.CallOption{},
		DeleteEndpoint:            []gax.CallOption{},
		DeployModel:               []gax.CallOption{},
		UndeployModel:             []gax.CallOption{},
		MutateDeployedModel:       []gax.CallOption{},
		GetLocation:               []gax.CallOption{},
		ListLocations:             []gax.CallOption{},
		GetIamPolicy:              []gax.CallOption{},
		SetIamPolicy:              []gax.CallOption{},
		TestIamPermissions:        []gax.CallOption{},
		CancelOperation:           []gax.CallOption{},
		DeleteOperation:           []gax.CallOption{},
		GetOperation:              []gax.CallOption{},
		ListOperations:            []gax.CallOption{},
		WaitOperation:             []gax.CallOption{},
	}
}

// internalEndpointClient is an interface that defines the methods available from Vertex AI API.
type internalEndpointClient interface {
	Close() error
	setGoogleClientInfo(...string)
	Connection() *grpc.ClientConn
	CreateEndpoint(context.Context, *aiplatformpb.CreateEndpointRequest, ...gax.CallOption) (*CreateEndpointOperation, error)
	CreateEndpointOperation(name string) *CreateEndpointOperation
	GetEndpoint(context.Context, *aiplatformpb.GetEndpointRequest, ...gax.CallOption) (*aiplatformpb.Endpoint, error)
	ListEndpoints(context.Context, *aiplatformpb.ListEndpointsRequest, ...gax.CallOption) *EndpointIterator
	UpdateEndpoint(context.Context, *aiplatformpb.UpdateEndpointRequest, ...gax.CallOption) (*aiplatformpb.Endpoint, error)
	UpdateEndpointLongRunning(context.Context, *aiplatformpb.UpdateEndpointLongRunningRequest, ...gax.CallOption) (*UpdateEndpointLongRunningOperation, error)
	UpdateEndpointLongRunningOperation(name string) *UpdateEndpointLongRunningOperation
	DeleteEndpoint(context.Context, *aiplatformpb.DeleteEndpointRequest, ...gax.CallOption) (*DeleteEndpointOperation, error)
	DeleteEndpointOperation(name string) *DeleteEndpointOperation
	DeployModel(context.Context, *aiplatformpb.DeployModelRequest, ...gax.CallOption) (*DeployModelOperation, error)
	DeployModelOperation(name string) *DeployModelOperation
	UndeployModel(context.Context, *aiplatformpb.UndeployModelRequest, ...gax.CallOption) (*UndeployModelOperation, error)
	UndeployModelOperation(name string) *UndeployModelOperation
	MutateDeployedModel(context.Context, *aiplatformpb.MutateDeployedModelRequest, ...gax.CallOption) (*MutateDeployedModelOperation, error)
	MutateDeployedModelOperation(name string) *MutateDeployedModelOperation
	GetLocation(context.Context, *locationpb.GetLocationRequest, ...gax.CallOption) (*locationpb.Location, error)
	ListLocations(context.Context, *locationpb.ListLocationsRequest, ...gax.CallOption) *LocationIterator
	GetIamPolicy(context.Context, *iampb.GetIamPolicyRequest, ...gax.CallOption) (*iampb.Policy, error)
	SetIamPolicy(context.Context, *iampb.SetIamPolicyRequest, ...gax.CallOption) (*iampb.Policy, error)
	TestIamPermissions(context.Context, *iampb.TestIamPermissionsRequest, ...gax.CallOption) (*iampb.TestIamPermissionsResponse, error)
	CancelOperation(context.Context, *longrunningpb.CancelOperationRequest, ...gax.CallOption) error
	DeleteOperation(context.Context, *longrunningpb.DeleteOperationRequest, ...gax.CallOption) error
	GetOperation(context.Context, *longrunningpb.GetOperationRequest, ...gax.CallOption) (*longrunningpb.Operation, error)
	ListOperations(context.Context, *longrunningpb.ListOperationsRequest, ...gax.CallOption) *OperationIterator
	WaitOperation(context.Context, *longrunningpb.WaitOperationRequest, ...gax.CallOption) (*longrunningpb.Operation, error)
}

// EndpointClient is a client for interacting with Vertex AI API.
// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
//
// A service for managing Vertex AI’s Endpoints.
type EndpointClient struct {
	// The internal transport-dependent client.
	internalClient internalEndpointClient

	// The call options for this service.
	CallOptions *EndpointCallOptions

	// LROClient is used internally to handle long-running operations.
	// It is exposed so that its CallOptions can be modified if required.
	// Users should not Close this client.
	LROClient *lroauto.OperationsClient
}

// Wrapper methods routed to the internal client.

// Close closes the connection to the API service. The user should invoke this when
// the client is no longer required.
func (c *EndpointClient) Close() error {
	return c.internalClient.Close()
}

// setGoogleClientInfo sets the name and version of the application in
// the `x-goog-api-client` header passed on each request. Intended for
// use by Google-written clients.
func (c *EndpointClient) setGoogleClientInfo(keyval ...string) {
	c.internalClient.setGoogleClientInfo(keyval...)
}

// Connection returns a connection to the API service.
//
// Deprecated: Connections are now pooled so this method does not always
// return the same resource.
func (c *EndpointClient) Connection() *grpc.ClientConn {
	return c.internalClient.Connection()
}

// CreateEndpoint creates an Endpoint.
func (c *EndpointClient) CreateEndpoint(ctx context.Context, req *aiplatformpb.CreateEndpointRequest, opts ...gax.CallOption) (*CreateEndpointOperation, error) {
	return c.internalClient.CreateEndpoint(ctx, req, opts...)
}

// CreateEndpointOperation returns a new CreateEndpointOperation from a given name.
// The name must be that of a previously created CreateEndpointOperation, possibly from a different process.
func (c *EndpointClient) CreateEndpointOperation(name string) *CreateEndpointOperation {
	return c.internalClient.CreateEndpointOperation(name)
}

// GetEndpoint gets an Endpoint.
func (c *EndpointClient) GetEndpoint(ctx context.Context, req *aiplatformpb.GetEndpointRequest, opts ...gax.CallOption) (*aiplatformpb.Endpoint, error) {
	return c.internalClient.GetEndpoint(ctx, req, opts...)
}

// ListEndpoints lists Endpoints in a Location.
func (c *EndpointClient) ListEndpoints(ctx context.Context, req *aiplatformpb.ListEndpointsRequest, opts ...gax.CallOption) *EndpointIterator {
	return c.internalClient.ListEndpoints(ctx, req, opts...)
}

// UpdateEndpoint updates an Endpoint.
func (c *EndpointClient) UpdateEndpoint(ctx context.Context, req *aiplatformpb.UpdateEndpointRequest, opts ...gax.CallOption) (*aiplatformpb.Endpoint, error) {
	return c.internalClient.UpdateEndpoint(ctx, req, opts...)
}

// UpdateEndpointLongRunning updates an Endpoint with a long running operation.
func (c *EndpointClient) UpdateEndpointLongRunning(ctx context.Context, req *aiplatformpb.UpdateEndpointLongRunningRequest, opts ...gax.CallOption) (*UpdateEndpointLongRunningOperation, error) {
	return c.internalClient.UpdateEndpointLongRunning(ctx, req, opts...)
}

// UpdateEndpointLongRunningOperation returns a new UpdateEndpointLongRunningOperation from a given name.
// The name must be that of a previously created UpdateEndpointLongRunningOperation, possibly from a different process.
func (c *EndpointClient) UpdateEndpointLongRunningOperation(name string) *UpdateEndpointLongRunningOperation {
	return c.internalClient.UpdateEndpointLongRunningOperation(name)
}

// DeleteEndpoint deletes an Endpoint.
func (c *EndpointClient) DeleteEndpoint(ctx context.Context, req *aiplatformpb.DeleteEndpointRequest, opts ...gax.CallOption) (*DeleteEndpointOperation, error) {
	return c.internalClient.DeleteEndpoint(ctx, req, opts...)
}

// DeleteEndpointOperation returns a new DeleteEndpointOperation from a given name.
// The name must be that of a previously created DeleteEndpointOperation, possibly from a different process.
func (c *EndpointClient) DeleteEndpointOperation(name string) *DeleteEndpointOperation {
	return c.internalClient.DeleteEndpointOperation(name)
}

// DeployModel deploys a Model into this Endpoint, creating a DeployedModel within it.
func (c *EndpointClient) DeployModel(ctx context.Context, req *aiplatformpb.DeployModelRequest, opts ...gax.CallOption) (*DeployModelOperation, error) {
	return c.internalClient.DeployModel(ctx, req, opts...)
}

// DeployModelOperation returns a new DeployModelOperation from a given name.
// The name must be that of a previously created DeployModelOperation, possibly from a different process.
func (c *EndpointClient) DeployModelOperation(name string) *DeployModelOperation {
	return c.internalClient.DeployModelOperation(name)
}

// UndeployModel undeploys a Model from an Endpoint, removing a DeployedModel from it, and
// freeing all resources it’s using.
func (c *EndpointClient) UndeployModel(ctx context.Context, req *aiplatformpb.UndeployModelRequest, opts ...gax.CallOption) (*UndeployModelOperation, error) {
	return c.internalClient.UndeployModel(ctx, req, opts...)
}

// UndeployModelOperation returns a new UndeployModelOperation from a given name.
// The name must be that of a previously created UndeployModelOperation, possibly from a different process.
func (c *EndpointClient) UndeployModelOperation(name string) *UndeployModelOperation {
	return c.internalClient.UndeployModelOperation(name)
}

// MutateDeployedModel updates an existing deployed model. Updatable fields include
// min_replica_count, max_replica_count, required_replica_count,
// autoscaling_metric_specs, disable_container_logging (v1 only), and
// enable_container_logging (v1beta1 only).
func (c *EndpointClient) MutateDeployedModel(ctx context.Context, req *aiplatformpb.MutateDeployedModelRequest, opts ...gax.CallOption) (*MutateDeployedModelOperation, error) {
	return c.internalClient.MutateDeployedModel(ctx, req, opts...)
}

// MutateDeployedModelOperation returns a new MutateDeployedModelOperation from a given name.
// The name must be that of a previously created MutateDeployedModelOperation, possibly from a different process.
func (c *EndpointClient) MutateDeployedModelOperation(name string) *MutateDeployedModelOperation {
	return c.internalClient.MutateDeployedModelOperation(name)
}

// GetLocation gets information about a location.
func (c *EndpointClient) GetLocation(ctx context.Context, req *locationpb.GetLocationRequest, opts ...gax.CallOption) (*locationpb.Location, error) {
	return c.internalClient.GetLocation(ctx, req, opts...)
}

// ListLocations lists information about the supported locations for this service.
func (c *EndpointClient) ListLocations(ctx context.Context, req *locationpb.ListLocationsRequest, opts ...gax.CallOption) *LocationIterator {
	return c.internalClient.ListLocations(ctx, req, opts...)
}

// GetIamPolicy gets the access control policy for a resource. Returns an empty policy
// if the resource exists and does not have a policy set.
func (c *EndpointClient) GetIamPolicy(ctx context.Context, req *iampb.GetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error) {
	return c.internalClient.GetIamPolicy(ctx, req, opts...)
}

// SetIamPolicy sets the access control policy on the specified resource. Replaces
// any existing policy.
//
// Can return NOT_FOUND, INVALID_ARGUMENT, and PERMISSION_DENIED
// errors.
func (c *EndpointClient) SetIamPolicy(ctx context.Context, req *iampb.SetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error) {
	return c.internalClient.SetIamPolicy(ctx, req, opts...)
}

// TestIamPermissions returns permissions that a caller has on the specified resource. If the
// resource does not exist, this will return an empty set of
// permissions, not a NOT_FOUND error.
//
// Note: This operation is designed to be used for building
// permission-aware UIs and command-line tools, not for authorization
// checking. This operation may “fail open” without warning.
func (c *EndpointClient) TestIamPermissions(ctx context.Context, req *iampb.TestIamPermissionsRequest, opts ...gax.CallOption) (*iampb.TestIamPermissionsResponse, error) {
	return c.internalClient.TestIamPermissions(ctx, req, opts...)
}

// CancelOperation is a utility method from google.longrunning.Operations.
func (c *EndpointClient) CancelOperation(ctx context.Context, req *longrunningpb.CancelOperationRequest, opts ...gax.CallOption) error {
	return c.internalClient.CancelOperation(ctx, req, opts...)
}

// DeleteOperation is a utility method from google.longrunning.Operations.
func (c *EndpointClient) DeleteOperation(ctx context.Context, req *longrunningpb.DeleteOperationRequest, opts ...gax.CallOption) error {
	return c.internalClient.DeleteOperation(ctx, req, opts...)
}

// GetOperation is a utility method from google.longrunning.Operations.
func (c *EndpointClient) GetOperation(ctx context.Context, req *longrunningpb.GetOperationRequest, opts ...gax.CallOption) (*longrunningpb.Operation, error) {
	return c.internalClient.GetOperation(ctx, req, opts...)
}

// ListOperations is a utility method from google.longrunning.Operations.
func (c *EndpointClient) ListOperations(ctx context.Context, req *longrunningpb.ListOperationsRequest, opts ...gax.CallOption) *OperationIterator {
	return c.internalClient.ListOperations(ctx, req, opts...)
}

// WaitOperation is a utility method from google.longrunning.Operations.
func (c *EndpointClient) WaitOperation(ctx context.Context, req *longrunningpb.WaitOperationRequest, opts ...gax.CallOption) (*longrunningpb.Operation, error) {
	return c.internalClient.WaitOperation(ctx, req, opts...)
}

// endpointGRPCClient is a client for interacting with Vertex AI API over gRPC transport.
//
// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
type endpointGRPCClient struct {
	// Connection pool of gRPC connections to the service.
	connPool gtransport.ConnPool

	// Points back to the CallOptions field of the containing EndpointClient
	CallOptions **EndpointCallOptions

	// The gRPC API client.
	endpointClient aiplatformpb.EndpointServiceClient

	// LROClient is used internally to handle long-running operations.
	// It is exposed so that its CallOptions can be modified if required.
	// Users should not Close this client.
	LROClient **lroauto.OperationsClient

	operationsClient longrunningpb.OperationsClient

	iamPolicyClient iampb.IAMPolicyClient

	locationsClient locationpb.LocationsClient

	// The x-goog-* metadata to be sent with each request.
	xGoogHeaders []string

	logger *slog.Logger
}

// NewEndpointClient creates a new endpoint service client based on gRPC.
// The returned client must be Closed when it is done being used to clean up its underlying connections.
//
// A service for managing Vertex AI’s Endpoints.
func NewEndpointClient(ctx context.Context, opts ...option.ClientOption) (*EndpointClient, error) {
	clientOpts := defaultEndpointGRPCClientOptions()
	if newEndpointClientHook != nil {
		hookOpts, err := newEndpointClientHook(ctx, clientHookParams{})
		if err != nil {
			return nil, err
		}
		clientOpts = append(clientOpts, hookOpts...)
	}

	connPool, err := gtransport.DialPool(ctx, append(clientOpts, opts...)...)
	if err != nil {
		return nil, err
	}
	client := EndpointClient{CallOptions: defaultEndpointCallOptions()}

	c := &endpointGRPCClient{
		connPool:         connPool,
		endpointClient:   aiplatformpb.NewEndpointServiceClient(connPool),
		CallOptions:      &client.CallOptions,
		logger:           internaloption.GetLogger(opts),
		operationsClient: longrunningpb.NewOperationsClient(connPool),
		iamPolicyClient:  iampb.NewIAMPolicyClient(connPool),
		locationsClient:  locationpb.NewLocationsClient(connPool),
	}
	c.setGoogleClientInfo()

	client.internalClient = c

	client.LROClient, err = lroauto.NewOperationsClient(ctx, gtransport.WithConnPool(connPool))
	if err != nil {
		// This error "should not happen", since we are just reusing old connection pool
		// and never actually need to dial.
		// If this does happen, we could leak connp. However, we cannot close conn:
		// If the user invoked the constructor with option.WithGRPCConn,
		// we would close a connection that's still in use.
		// TODO: investigate error conditions.
		return nil, err
	}
	c.LROClient = &client.LROClient
	return &client, nil
}

// Connection returns a connection to the API service.
//
// Deprecated: Connections are now pooled so this method does not always
// return the same resource.
func (c *endpointGRPCClient) Connection() *grpc.ClientConn {
	return c.connPool.Conn()
}

// setGoogleClientInfo sets the name and version of the application in
// the `x-goog-api-client` header passed on each request. Intended for
// use by Google-written clients.
func (c *endpointGRPCClient) setGoogleClientInfo(keyval ...string) {
	kv := append([]string{"gl-go", gax.GoVersion}, keyval...)
	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version, "pb", protoVersion)
	c.xGoogHeaders = []string{
		"x-goog-api-client", gax.XGoogHeader(kv...),
	}
}

// Close closes the connection to the API service. The user should invoke this when
// the client is no longer required.
func (c *endpointGRPCClient) Close() error {
	return c.connPool.Close()
}

func (c *endpointGRPCClient) CreateEndpoint(ctx context.Context, req *aiplatformpb.CreateEndpointRequest, opts ...gax.CallOption) (*CreateEndpointOperation, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).CreateEndpoint[0:len((*c.CallOptions).CreateEndpoint):len((*c.CallOptions).CreateEndpoint)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = executeRPC(ctx, c.endpointClient.CreateEndpoint, req, settings.GRPC, c.logger, "CreateEndpoint")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &CreateEndpointOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *endpointGRPCClient) GetEndpoint(ctx context.Context, req *aiplatformpb.GetEndpointRequest, opts ...gax.CallOption) (*aiplatformpb.Endpoint, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).GetEndpoint[0:len((*c.CallOptions).GetEndpoint):len((*c.CallOptions).GetEndpoint)], opts...)
	var resp *aiplatformpb.Endpoint
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = executeRPC(ctx, c.endpointClient.GetEndpoint, req, settings.GRPC, c.logger, "GetEndpoint")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *endpointGRPCClient) ListEndpoints(ctx context.Context, req *aiplatformpb.ListEndpointsRequest, opts ...gax.CallOption) *EndpointIterator {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).ListEndpoints[0:len((*c.CallOptions).ListEndpoints):len((*c.CallOptions).ListEndpoints)], opts...)
	it := &EndpointIterator{}
	req = proto.Clone(req).(*aiplatformpb.ListEndpointsRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*aiplatformpb.Endpoint, string, error) {
		resp := &aiplatformpb.ListEndpointsResponse{}
		if pageToken != "" {
			req.PageToken = pageToken
		}
		if pageSize > math.MaxInt32 {
			req.PageSize = math.MaxInt32
		} else if pageSize != 0 {
			req.PageSize = int32(pageSize)
		}
		err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
			var err error
			resp, err = executeRPC(ctx, c.endpointClient.ListEndpoints, req, settings.GRPC, c.logger, "ListEndpoints")
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

		it.Response = resp
		return resp.GetEndpoints(), resp.GetNextPageToken(), nil
	}
	fetch := func(pageSize int, pageToken string) (string, error) {
		items, nextPageToken, err := it.InternalFetch(pageSize, pageToken)
		if err != nil {
			return "", err
		}
		it.items = append(it.items, items...)
		return nextPageToken, nil
	}

	it.pageInfo, it.nextFunc = iterator.NewPageInfo(fetch, it.bufLen, it.takeBuf)
	it.pageInfo.MaxSize = int(req.GetPageSize())
	it.pageInfo.Token = req.GetPageToken()

	return it
}

func (c *endpointGRPCClient) UpdateEndpoint(ctx context.Context, req *aiplatformpb.UpdateEndpointRequest, opts ...gax.CallOption) (*aiplatformpb.Endpoint, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "endpoint.name", url.QueryEscape(req.GetEndpoint().GetName()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).UpdateEndpoint[0:len((*c.CallOptions).UpdateEndpoint):len((*c.CallOptions).UpdateEndpoint)], opts...)
	var resp *aiplatformpb.Endpoint
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = executeRPC(ctx, c.endpointClient.UpdateEndpoint, req, settings.GRPC, c.logger, "UpdateEndpoint")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *endpointGRPCClient) UpdateEndpointLongRunning(ctx context.Context, req *aiplatformpb.UpdateEndpointLongRunningRequest, opts ...gax.CallOption) (*UpdateEndpointLongRunningOperation, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "endpoint.name", url.QueryEscape(req.GetEndpoint().GetName()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).UpdateEndpointLongRunning[0:len((*c.CallOptions).UpdateEndpointLongRunning):len((*c.CallOptions).UpdateEndpointLongRunning)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = executeRPC(ctx, c.endpointClient.UpdateEndpointLongRunning, req, settings.GRPC, c.logger, "UpdateEndpointLongRunning")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &UpdateEndpointLongRunningOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *endpointGRPCClient) DeleteEndpoint(ctx context.Context, req *aiplatformpb.DeleteEndpointRequest, opts ...gax.CallOption) (*DeleteEndpointOperation, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).DeleteEndpoint[0:len((*c.CallOptions).DeleteEndpoint):len((*c.CallOptions).DeleteEndpoint)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = executeRPC(ctx, c.endpointClient.DeleteEndpoint, req, settings.GRPC, c.logger, "DeleteEndpoint")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &DeleteEndpointOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *endpointGRPCClient) DeployModel(ctx context.Context, req *aiplatformpb.DeployModelRequest, opts ...gax.CallOption) (*DeployModelOperation, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "endpoint", url.QueryEscape(req.GetEndpoint()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).DeployModel[0:len((*c.CallOptions).DeployModel):len((*c.CallOptions).DeployModel)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = executeRPC(ctx, c.endpointClient.DeployModel, req, settings.GRPC, c.logger, "DeployModel")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &DeployModelOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *endpointGRPCClient) UndeployModel(ctx context.Context, req *aiplatformpb.UndeployModelRequest, opts ...gax.CallOption) (*UndeployModelOperation, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "endpoint", url.QueryEscape(req.GetEndpoint()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).UndeployModel[0:len((*c.CallOptions).UndeployModel):len((*c.CallOptions).UndeployModel)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = executeRPC(ctx, c.endpointClient.UndeployModel, req, settings.GRPC, c.logger, "UndeployModel")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &UndeployModelOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *endpointGRPCClient) MutateDeployedModel(ctx context.Context, req *aiplatformpb.MutateDeployedModelRequest, opts ...gax.CallOption) (*MutateDeployedModelOperation, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "endpoint", url.QueryEscape(req.GetEndpoint()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).MutateDeployedModel[0:len((*c.CallOptions).MutateDeployedModel):len((*c.CallOptions).MutateDeployedModel)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = executeRPC(ctx, c.endpointClient.MutateDeployedModel, req, settings.GRPC, c.logger, "MutateDeployedModel")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &MutateDeployedModelOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *endpointGRPCClient) GetLocation(ctx context.Context, req *locationpb.GetLocationRequest, opts ...gax.CallOption) (*locationpb.Location, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).GetLocation[0:len((*c.CallOptions).GetLocation):len((*c.CallOptions).GetLocation)], opts...)
	var resp *locationpb.Location
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = executeRPC(ctx, c.locationsClient.GetLocation, req, settings.GRPC, c.logger, "GetLocation")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *endpointGRPCClient) ListLocations(ctx context.Context, req *locationpb.ListLocationsRequest, opts ...gax.CallOption) *LocationIterator {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).ListLocations[0:len((*c.CallOptions).ListLocations):len((*c.CallOptions).ListLocations)], opts...)
	it := &LocationIterator{}
	req = proto.Clone(req).(*locationpb.ListLocationsRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*locationpb.Location, string, error) {
		resp := &locationpb.ListLocationsResponse{}
		if pageToken != "" {
			req.PageToken = pageToken
		}
		if pageSize > math.MaxInt32 {
			req.PageSize = math.MaxInt32
		} else if pageSize != 0 {
			req.PageSize = int32(pageSize)
		}
		err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
			var err error
			resp, err = executeRPC(ctx, c.locationsClient.ListLocations, req, settings.GRPC, c.logger, "ListLocations")
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

		it.Response = resp
		return resp.GetLocations(), resp.GetNextPageToken(), nil
	}
	fetch := func(pageSize int, pageToken string) (string, error) {
		items, nextPageToken, err := it.InternalFetch(pageSize, pageToken)
		if err != nil {
			return "", err
		}
		it.items = append(it.items, items...)
		return nextPageToken, nil
	}

	it.pageInfo, it.nextFunc = iterator.NewPageInfo(fetch, it.bufLen, it.takeBuf)
	it.pageInfo.MaxSize = int(req.GetPageSize())
	it.pageInfo.Token = req.GetPageToken()

	return it
}

func (c *endpointGRPCClient) GetIamPolicy(ctx context.Context, req *iampb.GetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
	var resp *iampb.Policy
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = executeRPC(ctx, c.iamPolicyClient.GetIamPolicy, req, settings.GRPC, c.logger, "GetIamPolicy")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *endpointGRPCClient) SetIamPolicy(ctx context.Context, req *iampb.SetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
	var resp *iampb.Policy
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = executeRPC(ctx, c.iamPolicyClient.SetIamPolicy, req, settings.GRPC, c.logger, "SetIamPolicy")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *endpointGRPCClient) TestIamPermissions(ctx context.Context, req *iampb.TestIamPermissionsRequest, opts ...gax.CallOption) (*iampb.TestIamPermissionsResponse, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
	var resp *iampb.TestIamPermissionsResponse
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = executeRPC(ctx, c.iamPolicyClient.TestIamPermissions, req, settings.GRPC, c.logger, "TestIamPermissions")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *endpointGRPCClient) CancelOperation(ctx context.Context, req *longrunningpb.CancelOperationRequest, opts ...gax.CallOption) error {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).CancelOperation[0:len((*c.CallOptions).CancelOperation):len((*c.CallOptions).CancelOperation)], opts...)
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		_, err = executeRPC(ctx, c.operationsClient.CancelOperation, req, settings.GRPC, c.logger, "CancelOperation")
		return err
	}, opts...)
	return err
}

func (c *endpointGRPCClient) DeleteOperation(ctx context.Context, req *longrunningpb.DeleteOperationRequest, opts ...gax.CallOption) error {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).DeleteOperation[0:len((*c.CallOptions).DeleteOperation):len((*c.CallOptions).DeleteOperation)], opts...)
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		_, err = executeRPC(ctx, c.operationsClient.DeleteOperation, req, settings.GRPC, c.logger, "DeleteOperation")
		return err
	}, opts...)
	return err
}

func (c *endpointGRPCClient) GetOperation(ctx context.Context, req *longrunningpb.GetOperationRequest, opts ...gax.CallOption) (*longrunningpb.Operation, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).GetOperation[0:len((*c.CallOptions).GetOperation):len((*c.CallOptions).GetOperation)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = executeRPC(ctx, c.operationsClient.GetOperation, req, settings.GRPC, c.logger, "GetOperation")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *endpointGRPCClient) ListOperations(ctx context.Context, req *longrunningpb.ListOperationsRequest, opts ...gax.CallOption) *OperationIterator {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).ListOperations[0:len((*c.CallOptions).ListOperations):len((*c.CallOptions).ListOperations)], opts...)
	it := &OperationIterator{}
	req = proto.Clone(req).(*longrunningpb.ListOperationsRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*longrunningpb.Operation, string, error) {
		resp := &longrunningpb.ListOperationsResponse{}
		if pageToken != "" {
			req.PageToken = pageToken
		}
		if pageSize > math.MaxInt32 {
			req.PageSize = math.MaxInt32
		} else if pageSize != 0 {
			req.PageSize = int32(pageSize)
		}
		err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
			var err error
			resp, err = executeRPC(ctx, c.operationsClient.ListOperations, req, settings.GRPC, c.logger, "ListOperations")
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

		it.Response = resp
		return resp.GetOperations(), resp.GetNextPageToken(), nil
	}
	fetch := func(pageSize int, pageToken string) (string, error) {
		items, nextPageToken, err := it.InternalFetch(pageSize, pageToken)
		if err != nil {
			return "", err
		}
		it.items = append(it.items, items...)
		return nextPageToken, nil
	}

	it.pageInfo, it.nextFunc = iterator.NewPageInfo(fetch, it.bufLen, it.takeBuf)
	it.pageInfo.MaxSize = int(req.GetPageSize())
	it.pageInfo.Token = req.GetPageToken()

	return it
}

func (c *endpointGRPCClient) WaitOperation(ctx context.Context, req *longrunningpb.WaitOperationRequest, opts ...gax.CallOption) (*longrunningpb.Operation, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).WaitOperation[0:len((*c.CallOptions).WaitOperation):len((*c.CallOptions).WaitOperation)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = executeRPC(ctx, c.operationsClient.WaitOperation, req, settings.GRPC, c.logger, "WaitOperation")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

// CreateEndpointOperation returns a new CreateEndpointOperation from a given name.
// The name must be that of a previously created CreateEndpointOperation, possibly from a different process.
func (c *endpointGRPCClient) CreateEndpointOperation(name string) *CreateEndpointOperation {
	return &CreateEndpointOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, &longrunningpb.Operation{Name: name}),
	}
}

// DeleteEndpointOperation returns a new DeleteEndpointOperation from a given name.
// The name must be that of a previously created DeleteEndpointOperation, possibly from a different process.
func (c *endpointGRPCClient) DeleteEndpointOperation(name string) *DeleteEndpointOperation {
	return &DeleteEndpointOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, &longrunningpb.Operation{Name: name}),
	}
}

// DeployModelOperation returns a new DeployModelOperation from a given name.
// The name must be that of a previously created DeployModelOperation, possibly from a different process.
func (c *endpointGRPCClient) DeployModelOperation(name string) *DeployModelOperation {
	return &DeployModelOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, &longrunningpb.Operation{Name: name}),
	}
}

// MutateDeployedModelOperation returns a new MutateDeployedModelOperation from a given name.
// The name must be that of a previously created MutateDeployedModelOperation, possibly from a different process.
func (c *endpointGRPCClient) MutateDeployedModelOperation(name string) *MutateDeployedModelOperation {
	return &MutateDeployedModelOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, &longrunningpb.Operation{Name: name}),
	}
}

// UndeployModelOperation returns a new UndeployModelOperation from a given name.
// The name must be that of a previously created UndeployModelOperation, possibly from a different process.
func (c *endpointGRPCClient) UndeployModelOperation(name string) *UndeployModelOperation {
	return &UndeployModelOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, &longrunningpb.Operation{Name: name}),
	}
}

// UpdateEndpointLongRunningOperation returns a new UpdateEndpointLongRunningOperation from a given name.
// The name must be that of a previously created UpdateEndpointLongRunningOperation, possibly from a different process.
func (c *endpointGRPCClient) UpdateEndpointLongRunningOperation(name string) *UpdateEndpointLongRunningOperation {
	return &UpdateEndpointLongRunningOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, &longrunningpb.Operation{Name: name}),
	}
}
