// 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 iap

import (
	"bytes"
	"context"
	"fmt"
	"log/slog"
	"math"
	"net/http"
	"net/url"
	"time"

	iampb "cloud.google.com/go/iam/apiv1/iampb"
	iappb "cloud.google.com/go/iap/apiv1/iappb"
	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"
	httptransport "google.golang.org/api/transport/http"
	"google.golang.org/grpc"
	"google.golang.org/protobuf/encoding/protojson"
	"google.golang.org/protobuf/proto"
)

var newIdentityAwareProxyAdminClientHook clientHook

// IdentityAwareProxyAdminCallOptions contains the retry settings for each method of IdentityAwareProxyAdminClient.
type IdentityAwareProxyAdminCallOptions struct {
	SetIamPolicy                   []gax.CallOption
	GetIamPolicy                   []gax.CallOption
	TestIamPermissions             []gax.CallOption
	GetIapSettings                 []gax.CallOption
	UpdateIapSettings              []gax.CallOption
	ValidateIapAttributeExpression []gax.CallOption
	ListTunnelDestGroups           []gax.CallOption
	CreateTunnelDestGroup          []gax.CallOption
	GetTunnelDestGroup             []gax.CallOption
	DeleteTunnelDestGroup          []gax.CallOption
	UpdateTunnelDestGroup          []gax.CallOption
}

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

func defaultIdentityAwareProxyAdminCallOptions() *IdentityAwareProxyAdminCallOptions {
	return &IdentityAwareProxyAdminCallOptions{
		SetIamPolicy: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
		},
		GetIamPolicy: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
		},
		TestIamPermissions: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
		},
		GetIapSettings: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
		},
		UpdateIapSettings: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
		},
		ValidateIapAttributeExpression: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
		},
		ListTunnelDestGroups: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
		},
		CreateTunnelDestGroup: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
		},
		GetTunnelDestGroup: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
		},
		DeleteTunnelDestGroup: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
		},
		UpdateTunnelDestGroup: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
		},
	}
}

func defaultIdentityAwareProxyAdminRESTCallOptions() *IdentityAwareProxyAdminCallOptions {
	return &IdentityAwareProxyAdminCallOptions{
		SetIamPolicy: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
		},
		GetIamPolicy: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
		},
		TestIamPermissions: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
		},
		GetIapSettings: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
		},
		UpdateIapSettings: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
		},
		ValidateIapAttributeExpression: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
		},
		ListTunnelDestGroups: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
		},
		CreateTunnelDestGroup: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
		},
		GetTunnelDestGroup: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
		},
		DeleteTunnelDestGroup: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
		},
		UpdateTunnelDestGroup: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
		},
	}
}

// internalIdentityAwareProxyAdminClient is an interface that defines the methods available from Cloud Identity-Aware Proxy API.
type internalIdentityAwareProxyAdminClient interface {
	Close() error
	setGoogleClientInfo(...string)
	Connection() *grpc.ClientConn
	SetIamPolicy(context.Context, *iampb.SetIamPolicyRequest, ...gax.CallOption) (*iampb.Policy, error)
	GetIamPolicy(context.Context, *iampb.GetIamPolicyRequest, ...gax.CallOption) (*iampb.Policy, error)
	TestIamPermissions(context.Context, *iampb.TestIamPermissionsRequest, ...gax.CallOption) (*iampb.TestIamPermissionsResponse, error)
	GetIapSettings(context.Context, *iappb.GetIapSettingsRequest, ...gax.CallOption) (*iappb.IapSettings, error)
	UpdateIapSettings(context.Context, *iappb.UpdateIapSettingsRequest, ...gax.CallOption) (*iappb.IapSettings, error)
	ValidateIapAttributeExpression(context.Context, *iappb.ValidateIapAttributeExpressionRequest, ...gax.CallOption) (*iappb.ValidateIapAttributeExpressionResponse, error)
	ListTunnelDestGroups(context.Context, *iappb.ListTunnelDestGroupsRequest, ...gax.CallOption) *TunnelDestGroupIterator
	CreateTunnelDestGroup(context.Context, *iappb.CreateTunnelDestGroupRequest, ...gax.CallOption) (*iappb.TunnelDestGroup, error)
	GetTunnelDestGroup(context.Context, *iappb.GetTunnelDestGroupRequest, ...gax.CallOption) (*iappb.TunnelDestGroup, error)
	DeleteTunnelDestGroup(context.Context, *iappb.DeleteTunnelDestGroupRequest, ...gax.CallOption) error
	UpdateTunnelDestGroup(context.Context, *iappb.UpdateTunnelDestGroupRequest, ...gax.CallOption) (*iappb.TunnelDestGroup, error)
}

// IdentityAwareProxyAdminClient is a client for interacting with Cloud Identity-Aware Proxy API.
// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
//
// APIs for Identity-Aware Proxy Admin configurations.
type IdentityAwareProxyAdminClient struct {
	// The internal transport-dependent client.
	internalClient internalIdentityAwareProxyAdminClient

	// The call options for this service.
	CallOptions *IdentityAwareProxyAdminCallOptions
}

// 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 *IdentityAwareProxyAdminClient) 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 *IdentityAwareProxyAdminClient) 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 *IdentityAwareProxyAdminClient) Connection() *grpc.ClientConn {
	return c.internalClient.Connection()
}

// SetIamPolicy sets the access control policy for an Identity-Aware Proxy protected
// resource. Replaces any existing policy.
// More information about managing access via IAP can be found at:
// https://cloud.google.com/iap/docs/managing-access#managing_access_via_the_api (at https://cloud.google.com/iap/docs/managing-access#managing_access_via_the_api)
func (c *IdentityAwareProxyAdminClient) SetIamPolicy(ctx context.Context, req *iampb.SetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error) {
	return c.internalClient.SetIamPolicy(ctx, req, opts...)
}

// GetIamPolicy gets the access control policy for an Identity-Aware Proxy protected
// resource.
// More information about managing access via IAP can be found at:
// https://cloud.google.com/iap/docs/managing-access#managing_access_via_the_api (at https://cloud.google.com/iap/docs/managing-access#managing_access_via_the_api)
func (c *IdentityAwareProxyAdminClient) GetIamPolicy(ctx context.Context, req *iampb.GetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error) {
	return c.internalClient.GetIamPolicy(ctx, req, opts...)
}

// TestIamPermissions returns permissions that a caller has on the Identity-Aware Proxy protected
// resource.
// More information about managing access via IAP can be found at:
// https://cloud.google.com/iap/docs/managing-access#managing_access_via_the_api (at https://cloud.google.com/iap/docs/managing-access#managing_access_via_the_api)
func (c *IdentityAwareProxyAdminClient) TestIamPermissions(ctx context.Context, req *iampb.TestIamPermissionsRequest, opts ...gax.CallOption) (*iampb.TestIamPermissionsResponse, error) {
	return c.internalClient.TestIamPermissions(ctx, req, opts...)
}

// GetIapSettings gets the IAP settings on a particular IAP protected resource.
func (c *IdentityAwareProxyAdminClient) GetIapSettings(ctx context.Context, req *iappb.GetIapSettingsRequest, opts ...gax.CallOption) (*iappb.IapSettings, error) {
	return c.internalClient.GetIapSettings(ctx, req, opts...)
}

// UpdateIapSettings updates the IAP settings on a particular IAP protected resource. It
// replaces all fields unless the update_mask is set.
func (c *IdentityAwareProxyAdminClient) UpdateIapSettings(ctx context.Context, req *iappb.UpdateIapSettingsRequest, opts ...gax.CallOption) (*iappb.IapSettings, error) {
	return c.internalClient.UpdateIapSettings(ctx, req, opts...)
}

// ValidateIapAttributeExpression validates that a given CEL expression conforms to IAP restrictions.
func (c *IdentityAwareProxyAdminClient) ValidateIapAttributeExpression(ctx context.Context, req *iappb.ValidateIapAttributeExpressionRequest, opts ...gax.CallOption) (*iappb.ValidateIapAttributeExpressionResponse, error) {
	return c.internalClient.ValidateIapAttributeExpression(ctx, req, opts...)
}

// ListTunnelDestGroups lists the existing TunnelDestGroups. To group across all locations, use a
// - as the location ID. For example:
// /v1/projects/123/iap_tunnel/locations/-/destGroups
func (c *IdentityAwareProxyAdminClient) ListTunnelDestGroups(ctx context.Context, req *iappb.ListTunnelDestGroupsRequest, opts ...gax.CallOption) *TunnelDestGroupIterator {
	return c.internalClient.ListTunnelDestGroups(ctx, req, opts...)
}

// CreateTunnelDestGroup creates a new TunnelDestGroup.
func (c *IdentityAwareProxyAdminClient) CreateTunnelDestGroup(ctx context.Context, req *iappb.CreateTunnelDestGroupRequest, opts ...gax.CallOption) (*iappb.TunnelDestGroup, error) {
	return c.internalClient.CreateTunnelDestGroup(ctx, req, opts...)
}

// GetTunnelDestGroup retrieves an existing TunnelDestGroup.
func (c *IdentityAwareProxyAdminClient) GetTunnelDestGroup(ctx context.Context, req *iappb.GetTunnelDestGroupRequest, opts ...gax.CallOption) (*iappb.TunnelDestGroup, error) {
	return c.internalClient.GetTunnelDestGroup(ctx, req, opts...)
}

// DeleteTunnelDestGroup deletes a TunnelDestGroup.
func (c *IdentityAwareProxyAdminClient) DeleteTunnelDestGroup(ctx context.Context, req *iappb.DeleteTunnelDestGroupRequest, opts ...gax.CallOption) error {
	return c.internalClient.DeleteTunnelDestGroup(ctx, req, opts...)
}

// UpdateTunnelDestGroup updates a TunnelDestGroup.
func (c *IdentityAwareProxyAdminClient) UpdateTunnelDestGroup(ctx context.Context, req *iappb.UpdateTunnelDestGroupRequest, opts ...gax.CallOption) (*iappb.TunnelDestGroup, error) {
	return c.internalClient.UpdateTunnelDestGroup(ctx, req, opts...)
}

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

	// Points back to the CallOptions field of the containing IdentityAwareProxyAdminClient
	CallOptions **IdentityAwareProxyAdminCallOptions

	// The gRPC API client.
	identityAwareProxyAdminClient iappb.IdentityAwareProxyAdminServiceClient

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

	logger *slog.Logger
}

// NewIdentityAwareProxyAdminClient creates a new identity aware proxy admin service client based on gRPC.
// The returned client must be Closed when it is done being used to clean up its underlying connections.
//
// APIs for Identity-Aware Proxy Admin configurations.
func NewIdentityAwareProxyAdminClient(ctx context.Context, opts ...option.ClientOption) (*IdentityAwareProxyAdminClient, error) {
	clientOpts := defaultIdentityAwareProxyAdminGRPCClientOptions()
	if newIdentityAwareProxyAdminClientHook != nil {
		hookOpts, err := newIdentityAwareProxyAdminClientHook(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 := IdentityAwareProxyAdminClient{CallOptions: defaultIdentityAwareProxyAdminCallOptions()}

	c := &identityAwareProxyAdminGRPCClient{
		connPool:                      connPool,
		identityAwareProxyAdminClient: iappb.NewIdentityAwareProxyAdminServiceClient(connPool),
		CallOptions:                   &client.CallOptions,
		logger:                        internaloption.GetLogger(opts),
	}
	c.setGoogleClientInfo()

	client.internalClient = c

	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 *identityAwareProxyAdminGRPCClient) 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 *identityAwareProxyAdminGRPCClient) 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 *identityAwareProxyAdminGRPCClient) Close() error {
	return c.connPool.Close()
}

// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
type identityAwareProxyAdminRESTClient struct {
	// The http endpoint to connect to.
	endpoint string

	// The http client.
	httpClient *http.Client

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

	// Points back to the CallOptions field of the containing IdentityAwareProxyAdminClient
	CallOptions **IdentityAwareProxyAdminCallOptions

	logger *slog.Logger
}

// NewIdentityAwareProxyAdminRESTClient creates a new identity aware proxy admin service rest client.
//
// APIs for Identity-Aware Proxy Admin configurations.
func NewIdentityAwareProxyAdminRESTClient(ctx context.Context, opts ...option.ClientOption) (*IdentityAwareProxyAdminClient, error) {
	clientOpts := append(defaultIdentityAwareProxyAdminRESTClientOptions(), opts...)
	httpClient, endpoint, err := httptransport.NewClient(ctx, clientOpts...)
	if err != nil {
		return nil, err
	}

	callOpts := defaultIdentityAwareProxyAdminRESTCallOptions()
	c := &identityAwareProxyAdminRESTClient{
		endpoint:    endpoint,
		httpClient:  httpClient,
		CallOptions: &callOpts,
		logger:      internaloption.GetLogger(opts),
	}
	c.setGoogleClientInfo()

	return &IdentityAwareProxyAdminClient{internalClient: c, CallOptions: callOpts}, nil
}

func defaultIdentityAwareProxyAdminRESTClientOptions() []option.ClientOption {
	return []option.ClientOption{
		internaloption.WithDefaultEndpoint("https://iap.googleapis.com"),
		internaloption.WithDefaultEndpointTemplate("https://iap.UNIVERSE_DOMAIN"),
		internaloption.WithDefaultMTLSEndpoint("https://iap.mtls.googleapis.com"),
		internaloption.WithDefaultUniverseDomain("googleapis.com"),
		internaloption.WithDefaultAudience("https://iap.googleapis.com/"),
		internaloption.WithDefaultScopes(DefaultAuthScopes()...),
		internaloption.EnableNewAuthLibrary(),
	}
}

// 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 *identityAwareProxyAdminRESTClient) setGoogleClientInfo(keyval ...string) {
	kv := append([]string{"gl-go", gax.GoVersion}, keyval...)
	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN", "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 *identityAwareProxyAdminRESTClient) Close() error {
	// Replace httpClient with nil to force cleanup.
	c.httpClient = nil
	return nil
}

// Connection returns a connection to the API service.
//
// Deprecated: This method always returns nil.
func (c *identityAwareProxyAdminRESTClient) Connection() *grpc.ClientConn {
	return nil
}
func (c *identityAwareProxyAdminGRPCClient) 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.identityAwareProxyAdminClient.SetIamPolicy, req, settings.GRPC, c.logger, "SetIamPolicy")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *identityAwareProxyAdminGRPCClient) 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.identityAwareProxyAdminClient.GetIamPolicy, req, settings.GRPC, c.logger, "GetIamPolicy")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *identityAwareProxyAdminGRPCClient) 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.identityAwareProxyAdminClient.TestIamPermissions, req, settings.GRPC, c.logger, "TestIamPermissions")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *identityAwareProxyAdminGRPCClient) GetIapSettings(ctx context.Context, req *iappb.GetIapSettingsRequest, opts ...gax.CallOption) (*iappb.IapSettings, 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).GetIapSettings[0:len((*c.CallOptions).GetIapSettings):len((*c.CallOptions).GetIapSettings)], opts...)
	var resp *iappb.IapSettings
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = executeRPC(ctx, c.identityAwareProxyAdminClient.GetIapSettings, req, settings.GRPC, c.logger, "GetIapSettings")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *identityAwareProxyAdminGRPCClient) UpdateIapSettings(ctx context.Context, req *iappb.UpdateIapSettingsRequest, opts ...gax.CallOption) (*iappb.IapSettings, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "iap_settings.name", url.QueryEscape(req.GetIapSettings().GetName()))}

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

func (c *identityAwareProxyAdminGRPCClient) ValidateIapAttributeExpression(ctx context.Context, req *iappb.ValidateIapAttributeExpressionRequest, opts ...gax.CallOption) (*iappb.ValidateIapAttributeExpressionResponse, 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).ValidateIapAttributeExpression[0:len((*c.CallOptions).ValidateIapAttributeExpression):len((*c.CallOptions).ValidateIapAttributeExpression)], opts...)
	var resp *iappb.ValidateIapAttributeExpressionResponse
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = executeRPC(ctx, c.identityAwareProxyAdminClient.ValidateIapAttributeExpression, req, settings.GRPC, c.logger, "ValidateIapAttributeExpression")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *identityAwareProxyAdminGRPCClient) ListTunnelDestGroups(ctx context.Context, req *iappb.ListTunnelDestGroupsRequest, opts ...gax.CallOption) *TunnelDestGroupIterator {
	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).ListTunnelDestGroups[0:len((*c.CallOptions).ListTunnelDestGroups):len((*c.CallOptions).ListTunnelDestGroups)], opts...)
	it := &TunnelDestGroupIterator{}
	req = proto.Clone(req).(*iappb.ListTunnelDestGroupsRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*iappb.TunnelDestGroup, string, error) {
		resp := &iappb.ListTunnelDestGroupsResponse{}
		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.identityAwareProxyAdminClient.ListTunnelDestGroups, req, settings.GRPC, c.logger, "ListTunnelDestGroups")
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

		it.Response = resp
		return resp.GetTunnelDestGroups(), 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 *identityAwareProxyAdminGRPCClient) CreateTunnelDestGroup(ctx context.Context, req *iappb.CreateTunnelDestGroupRequest, opts ...gax.CallOption) (*iappb.TunnelDestGroup, 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).CreateTunnelDestGroup[0:len((*c.CallOptions).CreateTunnelDestGroup):len((*c.CallOptions).CreateTunnelDestGroup)], opts...)
	var resp *iappb.TunnelDestGroup
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = executeRPC(ctx, c.identityAwareProxyAdminClient.CreateTunnelDestGroup, req, settings.GRPC, c.logger, "CreateTunnelDestGroup")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *identityAwareProxyAdminGRPCClient) GetTunnelDestGroup(ctx context.Context, req *iappb.GetTunnelDestGroupRequest, opts ...gax.CallOption) (*iappb.TunnelDestGroup, 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).GetTunnelDestGroup[0:len((*c.CallOptions).GetTunnelDestGroup):len((*c.CallOptions).GetTunnelDestGroup)], opts...)
	var resp *iappb.TunnelDestGroup
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = executeRPC(ctx, c.identityAwareProxyAdminClient.GetTunnelDestGroup, req, settings.GRPC, c.logger, "GetTunnelDestGroup")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *identityAwareProxyAdminGRPCClient) DeleteTunnelDestGroup(ctx context.Context, req *iappb.DeleteTunnelDestGroupRequest, 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).DeleteTunnelDestGroup[0:len((*c.CallOptions).DeleteTunnelDestGroup):len((*c.CallOptions).DeleteTunnelDestGroup)], opts...)
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		_, err = executeRPC(ctx, c.identityAwareProxyAdminClient.DeleteTunnelDestGroup, req, settings.GRPC, c.logger, "DeleteTunnelDestGroup")
		return err
	}, opts...)
	return err
}

func (c *identityAwareProxyAdminGRPCClient) UpdateTunnelDestGroup(ctx context.Context, req *iappb.UpdateTunnelDestGroupRequest, opts ...gax.CallOption) (*iappb.TunnelDestGroup, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "tunnel_dest_group.name", url.QueryEscape(req.GetTunnelDestGroup().GetName()))}

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

// SetIamPolicy sets the access control policy for an Identity-Aware Proxy protected
// resource. Replaces any existing policy.
// More information about managing access via IAP can be found at:
// https://cloud.google.com/iap/docs/managing-access#managing_access_via_the_api (at https://cloud.google.com/iap/docs/managing-access#managing_access_via_the_api)
func (c *identityAwareProxyAdminRESTClient) SetIamPolicy(ctx context.Context, req *iampb.SetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	jsonReq, err := m.Marshal(req)
	if err != nil {
		return nil, err
	}

	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v1/%v:setIamPolicy", req.GetResource())

	params := url.Values{}
	params.Add("$alt", "json;enum-encoding=int")

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource()))}

	hds = append(c.xGoogHeaders, hds...)
	hds = append(hds, "Content-Type", "application/json")
	headers := gax.BuildHeaders(ctx, hds...)
	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	resp := &iampb.Policy{}
	e := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		if settings.Path != "" {
			baseUrl.Path = settings.Path
		}
		httpReq, err := http.NewRequest("POST", baseUrl.String(), bytes.NewReader(jsonReq))
		if err != nil {
			return err
		}
		httpReq = httpReq.WithContext(ctx)
		httpReq.Header = headers

		buf, err := executeHTTPRequest(ctx, c.httpClient, httpReq, c.logger, jsonReq, "SetIamPolicy")
		if err != nil {
			return err
		}

		if err := unm.Unmarshal(buf, resp); err != nil {
			return err
		}

		return nil
	}, opts...)
	if e != nil {
		return nil, e
	}
	return resp, nil
}

// GetIamPolicy gets the access control policy for an Identity-Aware Proxy protected
// resource.
// More information about managing access via IAP can be found at:
// https://cloud.google.com/iap/docs/managing-access#managing_access_via_the_api (at https://cloud.google.com/iap/docs/managing-access#managing_access_via_the_api)
func (c *identityAwareProxyAdminRESTClient) GetIamPolicy(ctx context.Context, req *iampb.GetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	jsonReq, err := m.Marshal(req)
	if err != nil {
		return nil, err
	}

	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v1/%v:getIamPolicy", req.GetResource())

	params := url.Values{}
	params.Add("$alt", "json;enum-encoding=int")

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource()))}

	hds = append(c.xGoogHeaders, hds...)
	hds = append(hds, "Content-Type", "application/json")
	headers := gax.BuildHeaders(ctx, hds...)
	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	resp := &iampb.Policy{}
	e := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		if settings.Path != "" {
			baseUrl.Path = settings.Path
		}
		httpReq, err := http.NewRequest("POST", baseUrl.String(), bytes.NewReader(jsonReq))
		if err != nil {
			return err
		}
		httpReq = httpReq.WithContext(ctx)
		httpReq.Header = headers

		buf, err := executeHTTPRequest(ctx, c.httpClient, httpReq, c.logger, jsonReq, "GetIamPolicy")
		if err != nil {
			return err
		}

		if err := unm.Unmarshal(buf, resp); err != nil {
			return err
		}

		return nil
	}, opts...)
	if e != nil {
		return nil, e
	}
	return resp, nil
}

// TestIamPermissions returns permissions that a caller has on the Identity-Aware Proxy protected
// resource.
// More information about managing access via IAP can be found at:
// https://cloud.google.com/iap/docs/managing-access#managing_access_via_the_api (at https://cloud.google.com/iap/docs/managing-access#managing_access_via_the_api)
func (c *identityAwareProxyAdminRESTClient) TestIamPermissions(ctx context.Context, req *iampb.TestIamPermissionsRequest, opts ...gax.CallOption) (*iampb.TestIamPermissionsResponse, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	jsonReq, err := m.Marshal(req)
	if err != nil {
		return nil, err
	}

	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v1/%v:testIamPermissions", req.GetResource())

	params := url.Values{}
	params.Add("$alt", "json;enum-encoding=int")

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource()))}

	hds = append(c.xGoogHeaders, hds...)
	hds = append(hds, "Content-Type", "application/json")
	headers := gax.BuildHeaders(ctx, hds...)
	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	resp := &iampb.TestIamPermissionsResponse{}
	e := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		if settings.Path != "" {
			baseUrl.Path = settings.Path
		}
		httpReq, err := http.NewRequest("POST", baseUrl.String(), bytes.NewReader(jsonReq))
		if err != nil {
			return err
		}
		httpReq = httpReq.WithContext(ctx)
		httpReq.Header = headers

		buf, err := executeHTTPRequest(ctx, c.httpClient, httpReq, c.logger, jsonReq, "TestIamPermissions")
		if err != nil {
			return err
		}

		if err := unm.Unmarshal(buf, resp); err != nil {
			return err
		}

		return nil
	}, opts...)
	if e != nil {
		return nil, e
	}
	return resp, nil
}

// GetIapSettings gets the IAP settings on a particular IAP protected resource.
func (c *identityAwareProxyAdminRESTClient) GetIapSettings(ctx context.Context, req *iappb.GetIapSettingsRequest, opts ...gax.CallOption) (*iappb.IapSettings, error) {
	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v1/%v:iapSettings", req.GetName())

	params := url.Values{}
	params.Add("$alt", "json;enum-encoding=int")

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName()))}

	hds = append(c.xGoogHeaders, hds...)
	hds = append(hds, "Content-Type", "application/json")
	headers := gax.BuildHeaders(ctx, hds...)
	opts = append((*c.CallOptions).GetIapSettings[0:len((*c.CallOptions).GetIapSettings):len((*c.CallOptions).GetIapSettings)], opts...)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	resp := &iappb.IapSettings{}
	e := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		if settings.Path != "" {
			baseUrl.Path = settings.Path
		}
		httpReq, err := http.NewRequest("GET", baseUrl.String(), nil)
		if err != nil {
			return err
		}
		httpReq = httpReq.WithContext(ctx)
		httpReq.Header = headers

		buf, err := executeHTTPRequest(ctx, c.httpClient, httpReq, c.logger, nil, "GetIapSettings")
		if err != nil {
			return err
		}

		if err := unm.Unmarshal(buf, resp); err != nil {
			return err
		}

		return nil
	}, opts...)
	if e != nil {
		return nil, e
	}
	return resp, nil
}

// UpdateIapSettings updates the IAP settings on a particular IAP protected resource. It
// replaces all fields unless the update_mask is set.
func (c *identityAwareProxyAdminRESTClient) UpdateIapSettings(ctx context.Context, req *iappb.UpdateIapSettingsRequest, opts ...gax.CallOption) (*iappb.IapSettings, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	body := req.GetIapSettings()
	jsonReq, err := m.Marshal(body)
	if err != nil {
		return nil, err
	}

	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v1/%v:iapSettings", req.GetIapSettings().GetName())

	params := url.Values{}
	params.Add("$alt", "json;enum-encoding=int")
	if req.GetUpdateMask() != nil {
		field, err := protojson.Marshal(req.GetUpdateMask())
		if err != nil {
			return nil, err
		}
		params.Add("updateMask", string(field[1:len(field)-1]))
	}

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "iap_settings.name", url.QueryEscape(req.GetIapSettings().GetName()))}

	hds = append(c.xGoogHeaders, hds...)
	hds = append(hds, "Content-Type", "application/json")
	headers := gax.BuildHeaders(ctx, hds...)
	opts = append((*c.CallOptions).UpdateIapSettings[0:len((*c.CallOptions).UpdateIapSettings):len((*c.CallOptions).UpdateIapSettings)], opts...)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	resp := &iappb.IapSettings{}
	e := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		if settings.Path != "" {
			baseUrl.Path = settings.Path
		}
		httpReq, err := http.NewRequest("PATCH", baseUrl.String(), bytes.NewReader(jsonReq))
		if err != nil {
			return err
		}
		httpReq = httpReq.WithContext(ctx)
		httpReq.Header = headers

		buf, err := executeHTTPRequest(ctx, c.httpClient, httpReq, c.logger, jsonReq, "UpdateIapSettings")
		if err != nil {
			return err
		}

		if err := unm.Unmarshal(buf, resp); err != nil {
			return err
		}

		return nil
	}, opts...)
	if e != nil {
		return nil, e
	}
	return resp, nil
}

// ValidateIapAttributeExpression validates that a given CEL expression conforms to IAP restrictions.
func (c *identityAwareProxyAdminRESTClient) ValidateIapAttributeExpression(ctx context.Context, req *iappb.ValidateIapAttributeExpressionRequest, opts ...gax.CallOption) (*iappb.ValidateIapAttributeExpressionResponse, error) {
	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v1/%v:validateAttributeExpression", req.GetName())

	params := url.Values{}
	params.Add("$alt", "json;enum-encoding=int")
	params.Add("expression", fmt.Sprintf("%v", req.GetExpression()))

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName()))}

	hds = append(c.xGoogHeaders, hds...)
	hds = append(hds, "Content-Type", "application/json")
	headers := gax.BuildHeaders(ctx, hds...)
	opts = append((*c.CallOptions).ValidateIapAttributeExpression[0:len((*c.CallOptions).ValidateIapAttributeExpression):len((*c.CallOptions).ValidateIapAttributeExpression)], opts...)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	resp := &iappb.ValidateIapAttributeExpressionResponse{}
	e := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		if settings.Path != "" {
			baseUrl.Path = settings.Path
		}
		httpReq, err := http.NewRequest("POST", baseUrl.String(), nil)
		if err != nil {
			return err
		}
		httpReq = httpReq.WithContext(ctx)
		httpReq.Header = headers

		buf, err := executeHTTPRequest(ctx, c.httpClient, httpReq, c.logger, nil, "ValidateIapAttributeExpression")
		if err != nil {
			return err
		}

		if err := unm.Unmarshal(buf, resp); err != nil {
			return err
		}

		return nil
	}, opts...)
	if e != nil {
		return nil, e
	}
	return resp, nil
}

// ListTunnelDestGroups lists the existing TunnelDestGroups. To group across all locations, use a
// - as the location ID. For example:
// /v1/projects/123/iap_tunnel/locations/-/destGroups
func (c *identityAwareProxyAdminRESTClient) ListTunnelDestGroups(ctx context.Context, req *iappb.ListTunnelDestGroupsRequest, opts ...gax.CallOption) *TunnelDestGroupIterator {
	it := &TunnelDestGroupIterator{}
	req = proto.Clone(req).(*iappb.ListTunnelDestGroupsRequest)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	it.InternalFetch = func(pageSize int, pageToken string) ([]*iappb.TunnelDestGroup, string, error) {
		resp := &iappb.ListTunnelDestGroupsResponse{}
		if pageToken != "" {
			req.PageToken = pageToken
		}
		if pageSize > math.MaxInt32 {
			req.PageSize = math.MaxInt32
		} else if pageSize != 0 {
			req.PageSize = int32(pageSize)
		}
		baseUrl, err := url.Parse(c.endpoint)
		if err != nil {
			return nil, "", err
		}
		baseUrl.Path += fmt.Sprintf("/v1/%v/destGroups", req.GetParent())

		params := url.Values{}
		params.Add("$alt", "json;enum-encoding=int")
		if req.GetPageSize() != 0 {
			params.Add("pageSize", fmt.Sprintf("%v", req.GetPageSize()))
		}
		if req.GetPageToken() != "" {
			params.Add("pageToken", fmt.Sprintf("%v", req.GetPageToken()))
		}

		baseUrl.RawQuery = params.Encode()

		// Build HTTP headers from client and context metadata.
		hds := append(c.xGoogHeaders, "Content-Type", "application/json")
		headers := gax.BuildHeaders(ctx, hds...)
		e := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
			if settings.Path != "" {
				baseUrl.Path = settings.Path
			}
			httpReq, err := http.NewRequest("GET", baseUrl.String(), nil)
			if err != nil {
				return err
			}
			httpReq.Header = headers

			buf, err := executeHTTPRequest(ctx, c.httpClient, httpReq, c.logger, nil, "ListTunnelDestGroups")
			if err != nil {
				return err
			}
			if err := unm.Unmarshal(buf, resp); err != nil {
				return err
			}

			return nil
		}, opts...)
		if e != nil {
			return nil, "", e
		}
		it.Response = resp
		return resp.GetTunnelDestGroups(), 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
}

// CreateTunnelDestGroup creates a new TunnelDestGroup.
func (c *identityAwareProxyAdminRESTClient) CreateTunnelDestGroup(ctx context.Context, req *iappb.CreateTunnelDestGroupRequest, opts ...gax.CallOption) (*iappb.TunnelDestGroup, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	body := req.GetTunnelDestGroup()
	jsonReq, err := m.Marshal(body)
	if err != nil {
		return nil, err
	}

	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v1/%v/destGroups", req.GetParent())

	params := url.Values{}
	params.Add("$alt", "json;enum-encoding=int")
	params.Add("tunnelDestGroupId", fmt.Sprintf("%v", req.GetTunnelDestGroupId()))

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent()))}

	hds = append(c.xGoogHeaders, hds...)
	hds = append(hds, "Content-Type", "application/json")
	headers := gax.BuildHeaders(ctx, hds...)
	opts = append((*c.CallOptions).CreateTunnelDestGroup[0:len((*c.CallOptions).CreateTunnelDestGroup):len((*c.CallOptions).CreateTunnelDestGroup)], opts...)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	resp := &iappb.TunnelDestGroup{}
	e := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		if settings.Path != "" {
			baseUrl.Path = settings.Path
		}
		httpReq, err := http.NewRequest("POST", baseUrl.String(), bytes.NewReader(jsonReq))
		if err != nil {
			return err
		}
		httpReq = httpReq.WithContext(ctx)
		httpReq.Header = headers

		buf, err := executeHTTPRequest(ctx, c.httpClient, httpReq, c.logger, jsonReq, "CreateTunnelDestGroup")
		if err != nil {
			return err
		}

		if err := unm.Unmarshal(buf, resp); err != nil {
			return err
		}

		return nil
	}, opts...)
	if e != nil {
		return nil, e
	}
	return resp, nil
}

// GetTunnelDestGroup retrieves an existing TunnelDestGroup.
func (c *identityAwareProxyAdminRESTClient) GetTunnelDestGroup(ctx context.Context, req *iappb.GetTunnelDestGroupRequest, opts ...gax.CallOption) (*iappb.TunnelDestGroup, error) {
	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v1/%v", req.GetName())

	params := url.Values{}
	params.Add("$alt", "json;enum-encoding=int")

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName()))}

	hds = append(c.xGoogHeaders, hds...)
	hds = append(hds, "Content-Type", "application/json")
	headers := gax.BuildHeaders(ctx, hds...)
	opts = append((*c.CallOptions).GetTunnelDestGroup[0:len((*c.CallOptions).GetTunnelDestGroup):len((*c.CallOptions).GetTunnelDestGroup)], opts...)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	resp := &iappb.TunnelDestGroup{}
	e := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		if settings.Path != "" {
			baseUrl.Path = settings.Path
		}
		httpReq, err := http.NewRequest("GET", baseUrl.String(), nil)
		if err != nil {
			return err
		}
		httpReq = httpReq.WithContext(ctx)
		httpReq.Header = headers

		buf, err := executeHTTPRequest(ctx, c.httpClient, httpReq, c.logger, nil, "GetTunnelDestGroup")
		if err != nil {
			return err
		}

		if err := unm.Unmarshal(buf, resp); err != nil {
			return err
		}

		return nil
	}, opts...)
	if e != nil {
		return nil, e
	}
	return resp, nil
}

// DeleteTunnelDestGroup deletes a TunnelDestGroup.
func (c *identityAwareProxyAdminRESTClient) DeleteTunnelDestGroup(ctx context.Context, req *iappb.DeleteTunnelDestGroupRequest, opts ...gax.CallOption) error {
	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return err
	}
	baseUrl.Path += fmt.Sprintf("/v1/%v", req.GetName())

	params := url.Values{}
	params.Add("$alt", "json;enum-encoding=int")

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName()))}

	hds = append(c.xGoogHeaders, hds...)
	hds = append(hds, "Content-Type", "application/json")
	headers := gax.BuildHeaders(ctx, hds...)
	return gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		if settings.Path != "" {
			baseUrl.Path = settings.Path
		}
		httpReq, err := http.NewRequest("DELETE", baseUrl.String(), nil)
		if err != nil {
			return err
		}
		httpReq = httpReq.WithContext(ctx)
		httpReq.Header = headers

		_, err = executeHTTPRequest(ctx, c.httpClient, httpReq, c.logger, nil, "DeleteTunnelDestGroup")
		return err
	}, opts...)
}

// UpdateTunnelDestGroup updates a TunnelDestGroup.
func (c *identityAwareProxyAdminRESTClient) UpdateTunnelDestGroup(ctx context.Context, req *iappb.UpdateTunnelDestGroupRequest, opts ...gax.CallOption) (*iappb.TunnelDestGroup, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	body := req.GetTunnelDestGroup()
	jsonReq, err := m.Marshal(body)
	if err != nil {
		return nil, err
	}

	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v1/%v", req.GetTunnelDestGroup().GetName())

	params := url.Values{}
	params.Add("$alt", "json;enum-encoding=int")
	if req.GetUpdateMask() != nil {
		field, err := protojson.Marshal(req.GetUpdateMask())
		if err != nil {
			return nil, err
		}
		params.Add("updateMask", string(field[1:len(field)-1]))
	}

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "tunnel_dest_group.name", url.QueryEscape(req.GetTunnelDestGroup().GetName()))}

	hds = append(c.xGoogHeaders, hds...)
	hds = append(hds, "Content-Type", "application/json")
	headers := gax.BuildHeaders(ctx, hds...)
	opts = append((*c.CallOptions).UpdateTunnelDestGroup[0:len((*c.CallOptions).UpdateTunnelDestGroup):len((*c.CallOptions).UpdateTunnelDestGroup)], opts...)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	resp := &iappb.TunnelDestGroup{}
	e := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		if settings.Path != "" {
			baseUrl.Path = settings.Path
		}
		httpReq, err := http.NewRequest("PATCH", baseUrl.String(), bytes.NewReader(jsonReq))
		if err != nil {
			return err
		}
		httpReq = httpReq.WithContext(ctx)
		httpReq.Header = headers

		buf, err := executeHTTPRequest(ctx, c.httpClient, httpReq, c.logger, jsonReq, "UpdateTunnelDestGroup")
		if err != nil {
			return err
		}

		if err := unm.Unmarshal(buf, resp); err != nil {
			return err
		}

		return nil
	}, opts...)
	if e != nil {
		return nil, e
	}
	return resp, nil
}
