// Copyright 2024 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 retail

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

	longrunningpb "cloud.google.com/go/longrunning/autogen/longrunningpb"
	retailpb "cloud.google.com/go/retail/apiv2/retailpb"
	gax "github.com/googleapis/gax-go/v2"
	"google.golang.org/api/googleapi"
	"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/grpc/codes"
	"google.golang.org/protobuf/encoding/protojson"
	"google.golang.org/protobuf/proto"
)

var newCatalogClientHook clientHook

// CatalogCallOptions contains the retry settings for each method of CatalogClient.
type CatalogCallOptions struct {
	ListCatalogs            []gax.CallOption
	UpdateCatalog           []gax.CallOption
	SetDefaultBranch        []gax.CallOption
	GetDefaultBranch        []gax.CallOption
	GetCompletionConfig     []gax.CallOption
	UpdateCompletionConfig  []gax.CallOption
	GetAttributesConfig     []gax.CallOption
	UpdateAttributesConfig  []gax.CallOption
	AddCatalogAttribute     []gax.CallOption
	RemoveCatalogAttribute  []gax.CallOption
	ReplaceCatalogAttribute []gax.CallOption
	GetOperation            []gax.CallOption
	ListOperations          []gax.CallOption
}

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

func defaultCatalogCallOptions() *CatalogCallOptions {
	return &CatalogCallOptions{
		ListCatalogs: []gax.CallOption{
			gax.WithTimeout(5000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
					codes.DeadlineExceeded,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        5000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		UpdateCatalog: []gax.CallOption{
			gax.WithTimeout(5000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
					codes.DeadlineExceeded,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        5000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		SetDefaultBranch: []gax.CallOption{
			gax.WithTimeout(5000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
					codes.DeadlineExceeded,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        5000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		GetDefaultBranch: []gax.CallOption{
			gax.WithTimeout(5000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
					codes.DeadlineExceeded,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        5000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		GetCompletionConfig: []gax.CallOption{
			gax.WithTimeout(5000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
					codes.DeadlineExceeded,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        5000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		UpdateCompletionConfig: []gax.CallOption{
			gax.WithTimeout(5000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
					codes.DeadlineExceeded,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        5000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		GetAttributesConfig: []gax.CallOption{
			gax.WithTimeout(5000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
					codes.DeadlineExceeded,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        5000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		UpdateAttributesConfig: []gax.CallOption{
			gax.WithTimeout(5000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
					codes.DeadlineExceeded,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        5000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		AddCatalogAttribute: []gax.CallOption{
			gax.WithTimeout(5000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
					codes.DeadlineExceeded,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        5000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		RemoveCatalogAttribute: []gax.CallOption{
			gax.WithTimeout(5000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
					codes.DeadlineExceeded,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        5000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		ReplaceCatalogAttribute: []gax.CallOption{
			gax.WithTimeout(5000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
					codes.DeadlineExceeded,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        5000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		GetOperation: []gax.CallOption{},
		ListOperations: []gax.CallOption{
			gax.WithTimeout(300000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
					codes.DeadlineExceeded,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        300000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
	}
}

func defaultCatalogRESTCallOptions() *CatalogCallOptions {
	return &CatalogCallOptions{
		ListCatalogs: []gax.CallOption{
			gax.WithTimeout(5000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        5000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable,
					http.StatusGatewayTimeout)
			}),
		},
		UpdateCatalog: []gax.CallOption{
			gax.WithTimeout(5000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        5000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable,
					http.StatusGatewayTimeout)
			}),
		},
		SetDefaultBranch: []gax.CallOption{
			gax.WithTimeout(5000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        5000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable,
					http.StatusGatewayTimeout)
			}),
		},
		GetDefaultBranch: []gax.CallOption{
			gax.WithTimeout(5000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        5000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable,
					http.StatusGatewayTimeout)
			}),
		},
		GetCompletionConfig: []gax.CallOption{
			gax.WithTimeout(5000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        5000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable,
					http.StatusGatewayTimeout)
			}),
		},
		UpdateCompletionConfig: []gax.CallOption{
			gax.WithTimeout(5000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        5000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable,
					http.StatusGatewayTimeout)
			}),
		},
		GetAttributesConfig: []gax.CallOption{
			gax.WithTimeout(5000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        5000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable,
					http.StatusGatewayTimeout)
			}),
		},
		UpdateAttributesConfig: []gax.CallOption{
			gax.WithTimeout(5000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        5000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable,
					http.StatusGatewayTimeout)
			}),
		},
		AddCatalogAttribute: []gax.CallOption{
			gax.WithTimeout(5000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        5000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable,
					http.StatusGatewayTimeout)
			}),
		},
		RemoveCatalogAttribute: []gax.CallOption{
			gax.WithTimeout(5000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        5000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable,
					http.StatusGatewayTimeout)
			}),
		},
		ReplaceCatalogAttribute: []gax.CallOption{
			gax.WithTimeout(5000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        5000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable,
					http.StatusGatewayTimeout)
			}),
		},
		GetOperation: []gax.CallOption{},
		ListOperations: []gax.CallOption{
			gax.WithTimeout(300000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        300000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable,
					http.StatusGatewayTimeout)
			}),
		},
	}
}

// internalCatalogClient is an interface that defines the methods available from Vertex AI Search for Retail API.
type internalCatalogClient interface {
	Close() error
	setGoogleClientInfo(...string)
	Connection() *grpc.ClientConn
	ListCatalogs(context.Context, *retailpb.ListCatalogsRequest, ...gax.CallOption) *CatalogIterator
	UpdateCatalog(context.Context, *retailpb.UpdateCatalogRequest, ...gax.CallOption) (*retailpb.Catalog, error)
	SetDefaultBranch(context.Context, *retailpb.SetDefaultBranchRequest, ...gax.CallOption) error
	GetDefaultBranch(context.Context, *retailpb.GetDefaultBranchRequest, ...gax.CallOption) (*retailpb.GetDefaultBranchResponse, error)
	GetCompletionConfig(context.Context, *retailpb.GetCompletionConfigRequest, ...gax.CallOption) (*retailpb.CompletionConfig, error)
	UpdateCompletionConfig(context.Context, *retailpb.UpdateCompletionConfigRequest, ...gax.CallOption) (*retailpb.CompletionConfig, error)
	GetAttributesConfig(context.Context, *retailpb.GetAttributesConfigRequest, ...gax.CallOption) (*retailpb.AttributesConfig, error)
	UpdateAttributesConfig(context.Context, *retailpb.UpdateAttributesConfigRequest, ...gax.CallOption) (*retailpb.AttributesConfig, error)
	AddCatalogAttribute(context.Context, *retailpb.AddCatalogAttributeRequest, ...gax.CallOption) (*retailpb.AttributesConfig, error)
	RemoveCatalogAttribute(context.Context, *retailpb.RemoveCatalogAttributeRequest, ...gax.CallOption) (*retailpb.AttributesConfig, error)
	ReplaceCatalogAttribute(context.Context, *retailpb.ReplaceCatalogAttributeRequest, ...gax.CallOption) (*retailpb.AttributesConfig, error)
	GetOperation(context.Context, *longrunningpb.GetOperationRequest, ...gax.CallOption) (*longrunningpb.Operation, error)
	ListOperations(context.Context, *longrunningpb.ListOperationsRequest, ...gax.CallOption) *OperationIterator
}

// CatalogClient is a client for interacting with Vertex AI Search for Retail API.
// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
//
// Service for managing catalog configuration.
type CatalogClient struct {
	// The internal transport-dependent client.
	internalClient internalCatalogClient

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

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

// ListCatalogs lists all the Catalogs associated with
// the project.
func (c *CatalogClient) ListCatalogs(ctx context.Context, req *retailpb.ListCatalogsRequest, opts ...gax.CallOption) *CatalogIterator {
	return c.internalClient.ListCatalogs(ctx, req, opts...)
}

// UpdateCatalog updates the Catalogs.
func (c *CatalogClient) UpdateCatalog(ctx context.Context, req *retailpb.UpdateCatalogRequest, opts ...gax.CallOption) (*retailpb.Catalog, error) {
	return c.internalClient.UpdateCatalog(ctx, req, opts...)
}

// SetDefaultBranch set a specified branch id as default branch. API methods such as
// SearchService.Search,
// ProductService.GetProduct,
// ProductService.ListProducts
// will treat requests using “default_branch” to the actual branch id set as
// default.
//
// For example, if projects/*/locations/*/catalogs/*/branches/1 is set as
// default, setting
// SearchRequest.branch to
// projects/*/locations/*/catalogs/*/branches/default_branch is equivalent
// to setting
// SearchRequest.branch to
// projects/*/locations/*/catalogs/*/branches/1.
//
// Using multiple branches can be useful when developers would like
// to have a staging branch to test and verify for future usage. When it
// becomes ready, developers switch on the staging branch using this API while
// keeping using projects/*/locations/*/catalogs/*/branches/default_branch
// as SearchRequest.branch to
// route the traffic to this staging branch.
//
// CAUTION: If you have live predict/search traffic, switching the default
// branch could potentially cause outages if the ID space of the new branch is
// very different from the old one.
//
// More specifically:
//
//	PredictionService will only return product IDs from branch {newBranch}.
//
//	SearchService will only return product IDs from branch {newBranch}
//	(if branch is not explicitly set).
//
//	UserEventService will only join events with products from branch
//	{newBranch}.
func (c *CatalogClient) SetDefaultBranch(ctx context.Context, req *retailpb.SetDefaultBranchRequest, opts ...gax.CallOption) error {
	return c.internalClient.SetDefaultBranch(ctx, req, opts...)
}

// GetDefaultBranch get which branch is currently default branch set by
// CatalogService.SetDefaultBranch
// method under a specified parent catalog.
func (c *CatalogClient) GetDefaultBranch(ctx context.Context, req *retailpb.GetDefaultBranchRequest, opts ...gax.CallOption) (*retailpb.GetDefaultBranchResponse, error) {
	return c.internalClient.GetDefaultBranch(ctx, req, opts...)
}

// GetCompletionConfig gets a CompletionConfig.
func (c *CatalogClient) GetCompletionConfig(ctx context.Context, req *retailpb.GetCompletionConfigRequest, opts ...gax.CallOption) (*retailpb.CompletionConfig, error) {
	return c.internalClient.GetCompletionConfig(ctx, req, opts...)
}

// UpdateCompletionConfig updates the CompletionConfigs.
func (c *CatalogClient) UpdateCompletionConfig(ctx context.Context, req *retailpb.UpdateCompletionConfigRequest, opts ...gax.CallOption) (*retailpb.CompletionConfig, error) {
	return c.internalClient.UpdateCompletionConfig(ctx, req, opts...)
}

// GetAttributesConfig gets an AttributesConfig.
func (c *CatalogClient) GetAttributesConfig(ctx context.Context, req *retailpb.GetAttributesConfigRequest, opts ...gax.CallOption) (*retailpb.AttributesConfig, error) {
	return c.internalClient.GetAttributesConfig(ctx, req, opts...)
}

// UpdateAttributesConfig updates the AttributesConfig.
//
// The catalog attributes in the request will be updated in the catalog, or
// inserted if they do not exist. Existing catalog attributes not included in
// the request will remain unchanged. Attributes that are assigned to
// products, but do not exist at the catalog level, are always included in the
// response. The product attribute is assigned default values for missing
// catalog attribute fields, e.g., searchable and dynamic facetable options.
func (c *CatalogClient) UpdateAttributesConfig(ctx context.Context, req *retailpb.UpdateAttributesConfigRequest, opts ...gax.CallOption) (*retailpb.AttributesConfig, error) {
	return c.internalClient.UpdateAttributesConfig(ctx, req, opts...)
}

// AddCatalogAttribute adds the specified
// CatalogAttribute to the
// AttributesConfig.
//
// If the CatalogAttribute to add
// already exists, an ALREADY_EXISTS error is returned.
func (c *CatalogClient) AddCatalogAttribute(ctx context.Context, req *retailpb.AddCatalogAttributeRequest, opts ...gax.CallOption) (*retailpb.AttributesConfig, error) {
	return c.internalClient.AddCatalogAttribute(ctx, req, opts...)
}

// RemoveCatalogAttribute removes the specified
// CatalogAttribute from the
// AttributesConfig.
//
// If the CatalogAttribute to
// remove does not exist, a NOT_FOUND error is returned.
func (c *CatalogClient) RemoveCatalogAttribute(ctx context.Context, req *retailpb.RemoveCatalogAttributeRequest, opts ...gax.CallOption) (*retailpb.AttributesConfig, error) {
	return c.internalClient.RemoveCatalogAttribute(ctx, req, opts...)
}

// ReplaceCatalogAttribute replaces the specified
// CatalogAttribute in the
// AttributesConfig by updating the
// catalog attribute with the same
// CatalogAttribute.key.
//
// If the CatalogAttribute to
// replace does not exist, a NOT_FOUND error is returned.
func (c *CatalogClient) ReplaceCatalogAttribute(ctx context.Context, req *retailpb.ReplaceCatalogAttributeRequest, opts ...gax.CallOption) (*retailpb.AttributesConfig, error) {
	return c.internalClient.ReplaceCatalogAttribute(ctx, req, opts...)
}

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

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

	// Points back to the CallOptions field of the containing CatalogClient
	CallOptions **CatalogCallOptions

	// The gRPC API client.
	catalogClient retailpb.CatalogServiceClient

	operationsClient longrunningpb.OperationsClient

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

// NewCatalogClient creates a new catalog service client based on gRPC.
// The returned client must be Closed when it is done being used to clean up its underlying connections.
//
// Service for managing catalog configuration.
func NewCatalogClient(ctx context.Context, opts ...option.ClientOption) (*CatalogClient, error) {
	clientOpts := defaultCatalogGRPCClientOptions()
	if newCatalogClientHook != nil {
		hookOpts, err := newCatalogClientHook(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 := CatalogClient{CallOptions: defaultCatalogCallOptions()}

	c := &catalogGRPCClient{
		connPool:         connPool,
		catalogClient:    retailpb.NewCatalogServiceClient(connPool),
		CallOptions:      &client.CallOptions,
		operationsClient: longrunningpb.NewOperationsClient(connPool),
	}
	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 *catalogGRPCClient) 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 *catalogGRPCClient) setGoogleClientInfo(keyval ...string) {
	kv := append([]string{"gl-go", gax.GoVersion}, keyval...)
	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
	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 *catalogGRPCClient) Close() error {
	return c.connPool.Close()
}

// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
type catalogRESTClient 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 CatalogClient
	CallOptions **CatalogCallOptions
}

// NewCatalogRESTClient creates a new catalog service rest client.
//
// Service for managing catalog configuration.
func NewCatalogRESTClient(ctx context.Context, opts ...option.ClientOption) (*CatalogClient, error) {
	clientOpts := append(defaultCatalogRESTClientOptions(), opts...)
	httpClient, endpoint, err := httptransport.NewClient(ctx, clientOpts...)
	if err != nil {
		return nil, err
	}

	callOpts := defaultCatalogRESTCallOptions()
	c := &catalogRESTClient{
		endpoint:    endpoint,
		httpClient:  httpClient,
		CallOptions: &callOpts,
	}
	c.setGoogleClientInfo()

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

func defaultCatalogRESTClientOptions() []option.ClientOption {
	return []option.ClientOption{
		internaloption.WithDefaultEndpoint("https://retail.googleapis.com"),
		internaloption.WithDefaultEndpointTemplate("https://retail.UNIVERSE_DOMAIN"),
		internaloption.WithDefaultMTLSEndpoint("https://retail.mtls.googleapis.com"),
		internaloption.WithDefaultUniverseDomain("googleapis.com"),
		internaloption.WithDefaultAudience("https://retail.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 *catalogRESTClient) setGoogleClientInfo(keyval ...string) {
	kv := append([]string{"gl-go", gax.GoVersion}, keyval...)
	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
	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 *catalogRESTClient) 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 *catalogRESTClient) Connection() *grpc.ClientConn {
	return nil
}
func (c *catalogGRPCClient) ListCatalogs(ctx context.Context, req *retailpb.ListCatalogsRequest, opts ...gax.CallOption) *CatalogIterator {
	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).ListCatalogs[0:len((*c.CallOptions).ListCatalogs):len((*c.CallOptions).ListCatalogs)], opts...)
	it := &CatalogIterator{}
	req = proto.Clone(req).(*retailpb.ListCatalogsRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*retailpb.Catalog, string, error) {
		resp := &retailpb.ListCatalogsResponse{}
		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 = c.catalogClient.ListCatalogs(ctx, req, settings.GRPC...)
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

		it.Response = resp
		return resp.GetCatalogs(), 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 *catalogGRPCClient) UpdateCatalog(ctx context.Context, req *retailpb.UpdateCatalogRequest, opts ...gax.CallOption) (*retailpb.Catalog, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "catalog.name", url.QueryEscape(req.GetCatalog().GetName()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).UpdateCatalog[0:len((*c.CallOptions).UpdateCatalog):len((*c.CallOptions).UpdateCatalog)], opts...)
	var resp *retailpb.Catalog
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.catalogClient.UpdateCatalog(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *catalogGRPCClient) SetDefaultBranch(ctx context.Context, req *retailpb.SetDefaultBranchRequest, opts ...gax.CallOption) error {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "catalog", url.QueryEscape(req.GetCatalog()))}

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

func (c *catalogGRPCClient) GetDefaultBranch(ctx context.Context, req *retailpb.GetDefaultBranchRequest, opts ...gax.CallOption) (*retailpb.GetDefaultBranchResponse, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "catalog", url.QueryEscape(req.GetCatalog()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).GetDefaultBranch[0:len((*c.CallOptions).GetDefaultBranch):len((*c.CallOptions).GetDefaultBranch)], opts...)
	var resp *retailpb.GetDefaultBranchResponse
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.catalogClient.GetDefaultBranch(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *catalogGRPCClient) GetCompletionConfig(ctx context.Context, req *retailpb.GetCompletionConfigRequest, opts ...gax.CallOption) (*retailpb.CompletionConfig, 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).GetCompletionConfig[0:len((*c.CallOptions).GetCompletionConfig):len((*c.CallOptions).GetCompletionConfig)], opts...)
	var resp *retailpb.CompletionConfig
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.catalogClient.GetCompletionConfig(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *catalogGRPCClient) UpdateCompletionConfig(ctx context.Context, req *retailpb.UpdateCompletionConfigRequest, opts ...gax.CallOption) (*retailpb.CompletionConfig, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "completion_config.name", url.QueryEscape(req.GetCompletionConfig().GetName()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).UpdateCompletionConfig[0:len((*c.CallOptions).UpdateCompletionConfig):len((*c.CallOptions).UpdateCompletionConfig)], opts...)
	var resp *retailpb.CompletionConfig
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.catalogClient.UpdateCompletionConfig(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *catalogGRPCClient) GetAttributesConfig(ctx context.Context, req *retailpb.GetAttributesConfigRequest, opts ...gax.CallOption) (*retailpb.AttributesConfig, 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).GetAttributesConfig[0:len((*c.CallOptions).GetAttributesConfig):len((*c.CallOptions).GetAttributesConfig)], opts...)
	var resp *retailpb.AttributesConfig
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.catalogClient.GetAttributesConfig(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *catalogGRPCClient) UpdateAttributesConfig(ctx context.Context, req *retailpb.UpdateAttributesConfigRequest, opts ...gax.CallOption) (*retailpb.AttributesConfig, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "attributes_config.name", url.QueryEscape(req.GetAttributesConfig().GetName()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).UpdateAttributesConfig[0:len((*c.CallOptions).UpdateAttributesConfig):len((*c.CallOptions).UpdateAttributesConfig)], opts...)
	var resp *retailpb.AttributesConfig
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.catalogClient.UpdateAttributesConfig(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *catalogGRPCClient) AddCatalogAttribute(ctx context.Context, req *retailpb.AddCatalogAttributeRequest, opts ...gax.CallOption) (*retailpb.AttributesConfig, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "attributes_config", url.QueryEscape(req.GetAttributesConfig()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).AddCatalogAttribute[0:len((*c.CallOptions).AddCatalogAttribute):len((*c.CallOptions).AddCatalogAttribute)], opts...)
	var resp *retailpb.AttributesConfig
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.catalogClient.AddCatalogAttribute(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *catalogGRPCClient) RemoveCatalogAttribute(ctx context.Context, req *retailpb.RemoveCatalogAttributeRequest, opts ...gax.CallOption) (*retailpb.AttributesConfig, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "attributes_config", url.QueryEscape(req.GetAttributesConfig()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).RemoveCatalogAttribute[0:len((*c.CallOptions).RemoveCatalogAttribute):len((*c.CallOptions).RemoveCatalogAttribute)], opts...)
	var resp *retailpb.AttributesConfig
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.catalogClient.RemoveCatalogAttribute(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *catalogGRPCClient) ReplaceCatalogAttribute(ctx context.Context, req *retailpb.ReplaceCatalogAttributeRequest, opts ...gax.CallOption) (*retailpb.AttributesConfig, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "attributes_config", url.QueryEscape(req.GetAttributesConfig()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).ReplaceCatalogAttribute[0:len((*c.CallOptions).ReplaceCatalogAttribute):len((*c.CallOptions).ReplaceCatalogAttribute)], opts...)
	var resp *retailpb.AttributesConfig
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.catalogClient.ReplaceCatalogAttribute(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *catalogGRPCClient) 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 = c.operationsClient.GetOperation(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *catalogGRPCClient) 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 = c.operationsClient.ListOperations(ctx, req, settings.GRPC...)
			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
}

// ListCatalogs lists all the Catalogs associated with
// the project.
func (c *catalogRESTClient) ListCatalogs(ctx context.Context, req *retailpb.ListCatalogsRequest, opts ...gax.CallOption) *CatalogIterator {
	it := &CatalogIterator{}
	req = proto.Clone(req).(*retailpb.ListCatalogsRequest)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	it.InternalFetch = func(pageSize int, pageToken string) ([]*retailpb.Catalog, string, error) {
		resp := &retailpb.ListCatalogsResponse{}
		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("/v2/%v/catalogs", 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

			httpRsp, err := c.httpClient.Do(httpReq)
			if err != nil {
				return err
			}
			defer httpRsp.Body.Close()

			if err = googleapi.CheckResponse(httpRsp); err != nil {
				return err
			}

			buf, err := io.ReadAll(httpRsp.Body)
			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.GetCatalogs(), 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
}

// UpdateCatalog updates the Catalogs.
func (c *catalogRESTClient) UpdateCatalog(ctx context.Context, req *retailpb.UpdateCatalogRequest, opts ...gax.CallOption) (*retailpb.Catalog, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	body := req.GetCatalog()
	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("/v2/%v", req.GetCatalog().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", "catalog.name", url.QueryEscape(req.GetCatalog().GetName()))}

	hds = append(c.xGoogHeaders, hds...)
	hds = append(hds, "Content-Type", "application/json")
	headers := gax.BuildHeaders(ctx, hds...)
	opts = append((*c.CallOptions).UpdateCatalog[0:len((*c.CallOptions).UpdateCatalog):len((*c.CallOptions).UpdateCatalog)], opts...)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	resp := &retailpb.Catalog{}
	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

		httpRsp, err := c.httpClient.Do(httpReq)
		if err != nil {
			return err
		}
		defer httpRsp.Body.Close()

		if err = googleapi.CheckResponse(httpRsp); err != nil {
			return err
		}

		buf, err := io.ReadAll(httpRsp.Body)
		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
}

// SetDefaultBranch set a specified branch id as default branch. API methods such as
// SearchService.Search,
// ProductService.GetProduct,
// ProductService.ListProducts
// will treat requests using “default_branch” to the actual branch id set as
// default.
//
// For example, if projects/*/locations/*/catalogs/*/branches/1 is set as
// default, setting
// SearchRequest.branch to
// projects/*/locations/*/catalogs/*/branches/default_branch is equivalent
// to setting
// SearchRequest.branch to
// projects/*/locations/*/catalogs/*/branches/1.
//
// Using multiple branches can be useful when developers would like
// to have a staging branch to test and verify for future usage. When it
// becomes ready, developers switch on the staging branch using this API while
// keeping using projects/*/locations/*/catalogs/*/branches/default_branch
// as SearchRequest.branch to
// route the traffic to this staging branch.
//
// CAUTION: If you have live predict/search traffic, switching the default
// branch could potentially cause outages if the ID space of the new branch is
// very different from the old one.
//
// More specifically:
//
//	PredictionService will only return product IDs from branch {newBranch}.
//
//	SearchService will only return product IDs from branch {newBranch}
//	(if branch is not explicitly set).
//
//	UserEventService will only join events with products from branch
//	{newBranch}.
func (c *catalogRESTClient) SetDefaultBranch(ctx context.Context, req *retailpb.SetDefaultBranchRequest, opts ...gax.CallOption) error {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	jsonReq, err := m.Marshal(req)
	if err != nil {
		return err
	}

	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return err
	}
	baseUrl.Path += fmt.Sprintf("/v2/%v:setDefaultBranch", req.GetCatalog())

	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", "catalog", url.QueryEscape(req.GetCatalog()))}

	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("POST", baseUrl.String(), bytes.NewReader(jsonReq))
		if err != nil {
			return err
		}
		httpReq = httpReq.WithContext(ctx)
		httpReq.Header = headers

		httpRsp, err := c.httpClient.Do(httpReq)
		if err != nil {
			return err
		}
		defer httpRsp.Body.Close()

		// Returns nil if there is no error, otherwise wraps
		// the response code and body into a non-nil error
		return googleapi.CheckResponse(httpRsp)
	}, opts...)
}

// GetDefaultBranch get which branch is currently default branch set by
// CatalogService.SetDefaultBranch
// method under a specified parent catalog.
func (c *catalogRESTClient) GetDefaultBranch(ctx context.Context, req *retailpb.GetDefaultBranchRequest, opts ...gax.CallOption) (*retailpb.GetDefaultBranchResponse, error) {
	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v2/%v:getDefaultBranch", req.GetCatalog())

	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", "catalog", url.QueryEscape(req.GetCatalog()))}

	hds = append(c.xGoogHeaders, hds...)
	hds = append(hds, "Content-Type", "application/json")
	headers := gax.BuildHeaders(ctx, hds...)
	opts = append((*c.CallOptions).GetDefaultBranch[0:len((*c.CallOptions).GetDefaultBranch):len((*c.CallOptions).GetDefaultBranch)], opts...)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	resp := &retailpb.GetDefaultBranchResponse{}
	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

		httpRsp, err := c.httpClient.Do(httpReq)
		if err != nil {
			return err
		}
		defer httpRsp.Body.Close()

		if err = googleapi.CheckResponse(httpRsp); err != nil {
			return err
		}

		buf, err := io.ReadAll(httpRsp.Body)
		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
}

// GetCompletionConfig gets a CompletionConfig.
func (c *catalogRESTClient) GetCompletionConfig(ctx context.Context, req *retailpb.GetCompletionConfigRequest, opts ...gax.CallOption) (*retailpb.CompletionConfig, error) {
	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v2/%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).GetCompletionConfig[0:len((*c.CallOptions).GetCompletionConfig):len((*c.CallOptions).GetCompletionConfig)], opts...)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	resp := &retailpb.CompletionConfig{}
	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

		httpRsp, err := c.httpClient.Do(httpReq)
		if err != nil {
			return err
		}
		defer httpRsp.Body.Close()

		if err = googleapi.CheckResponse(httpRsp); err != nil {
			return err
		}

		buf, err := io.ReadAll(httpRsp.Body)
		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
}

// UpdateCompletionConfig updates the CompletionConfigs.
func (c *catalogRESTClient) UpdateCompletionConfig(ctx context.Context, req *retailpb.UpdateCompletionConfigRequest, opts ...gax.CallOption) (*retailpb.CompletionConfig, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	body := req.GetCompletionConfig()
	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("/v2/%v", req.GetCompletionConfig().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", "completion_config.name", url.QueryEscape(req.GetCompletionConfig().GetName()))}

	hds = append(c.xGoogHeaders, hds...)
	hds = append(hds, "Content-Type", "application/json")
	headers := gax.BuildHeaders(ctx, hds...)
	opts = append((*c.CallOptions).UpdateCompletionConfig[0:len((*c.CallOptions).UpdateCompletionConfig):len((*c.CallOptions).UpdateCompletionConfig)], opts...)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	resp := &retailpb.CompletionConfig{}
	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

		httpRsp, err := c.httpClient.Do(httpReq)
		if err != nil {
			return err
		}
		defer httpRsp.Body.Close()

		if err = googleapi.CheckResponse(httpRsp); err != nil {
			return err
		}

		buf, err := io.ReadAll(httpRsp.Body)
		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
}

// GetAttributesConfig gets an AttributesConfig.
func (c *catalogRESTClient) GetAttributesConfig(ctx context.Context, req *retailpb.GetAttributesConfigRequest, opts ...gax.CallOption) (*retailpb.AttributesConfig, error) {
	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v2/%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).GetAttributesConfig[0:len((*c.CallOptions).GetAttributesConfig):len((*c.CallOptions).GetAttributesConfig)], opts...)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	resp := &retailpb.AttributesConfig{}
	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

		httpRsp, err := c.httpClient.Do(httpReq)
		if err != nil {
			return err
		}
		defer httpRsp.Body.Close()

		if err = googleapi.CheckResponse(httpRsp); err != nil {
			return err
		}

		buf, err := io.ReadAll(httpRsp.Body)
		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
}

// UpdateAttributesConfig updates the AttributesConfig.
//
// The catalog attributes in the request will be updated in the catalog, or
// inserted if they do not exist. Existing catalog attributes not included in
// the request will remain unchanged. Attributes that are assigned to
// products, but do not exist at the catalog level, are always included in the
// response. The product attribute is assigned default values for missing
// catalog attribute fields, e.g., searchable and dynamic facetable options.
func (c *catalogRESTClient) UpdateAttributesConfig(ctx context.Context, req *retailpb.UpdateAttributesConfigRequest, opts ...gax.CallOption) (*retailpb.AttributesConfig, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	body := req.GetAttributesConfig()
	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("/v2/%v", req.GetAttributesConfig().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", "attributes_config.name", url.QueryEscape(req.GetAttributesConfig().GetName()))}

	hds = append(c.xGoogHeaders, hds...)
	hds = append(hds, "Content-Type", "application/json")
	headers := gax.BuildHeaders(ctx, hds...)
	opts = append((*c.CallOptions).UpdateAttributesConfig[0:len((*c.CallOptions).UpdateAttributesConfig):len((*c.CallOptions).UpdateAttributesConfig)], opts...)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	resp := &retailpb.AttributesConfig{}
	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

		httpRsp, err := c.httpClient.Do(httpReq)
		if err != nil {
			return err
		}
		defer httpRsp.Body.Close()

		if err = googleapi.CheckResponse(httpRsp); err != nil {
			return err
		}

		buf, err := io.ReadAll(httpRsp.Body)
		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
}

// AddCatalogAttribute adds the specified
// CatalogAttribute to the
// AttributesConfig.
//
// If the CatalogAttribute to add
// already exists, an ALREADY_EXISTS error is returned.
func (c *catalogRESTClient) AddCatalogAttribute(ctx context.Context, req *retailpb.AddCatalogAttributeRequest, opts ...gax.CallOption) (*retailpb.AttributesConfig, 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("/v2/%v:addCatalogAttribute", req.GetAttributesConfig())

	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", "attributes_config", url.QueryEscape(req.GetAttributesConfig()))}

	hds = append(c.xGoogHeaders, hds...)
	hds = append(hds, "Content-Type", "application/json")
	headers := gax.BuildHeaders(ctx, hds...)
	opts = append((*c.CallOptions).AddCatalogAttribute[0:len((*c.CallOptions).AddCatalogAttribute):len((*c.CallOptions).AddCatalogAttribute)], opts...)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	resp := &retailpb.AttributesConfig{}
	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

		httpRsp, err := c.httpClient.Do(httpReq)
		if err != nil {
			return err
		}
		defer httpRsp.Body.Close()

		if err = googleapi.CheckResponse(httpRsp); err != nil {
			return err
		}

		buf, err := io.ReadAll(httpRsp.Body)
		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
}

// RemoveCatalogAttribute removes the specified
// CatalogAttribute from the
// AttributesConfig.
//
// If the CatalogAttribute to
// remove does not exist, a NOT_FOUND error is returned.
func (c *catalogRESTClient) RemoveCatalogAttribute(ctx context.Context, req *retailpb.RemoveCatalogAttributeRequest, opts ...gax.CallOption) (*retailpb.AttributesConfig, 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("/v2/%v:removeCatalogAttribute", req.GetAttributesConfig())

	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", "attributes_config", url.QueryEscape(req.GetAttributesConfig()))}

	hds = append(c.xGoogHeaders, hds...)
	hds = append(hds, "Content-Type", "application/json")
	headers := gax.BuildHeaders(ctx, hds...)
	opts = append((*c.CallOptions).RemoveCatalogAttribute[0:len((*c.CallOptions).RemoveCatalogAttribute):len((*c.CallOptions).RemoveCatalogAttribute)], opts...)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	resp := &retailpb.AttributesConfig{}
	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

		httpRsp, err := c.httpClient.Do(httpReq)
		if err != nil {
			return err
		}
		defer httpRsp.Body.Close()

		if err = googleapi.CheckResponse(httpRsp); err != nil {
			return err
		}

		buf, err := io.ReadAll(httpRsp.Body)
		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
}

// ReplaceCatalogAttribute replaces the specified
// CatalogAttribute in the
// AttributesConfig by updating the
// catalog attribute with the same
// CatalogAttribute.key.
//
// If the CatalogAttribute to
// replace does not exist, a NOT_FOUND error is returned.
func (c *catalogRESTClient) ReplaceCatalogAttribute(ctx context.Context, req *retailpb.ReplaceCatalogAttributeRequest, opts ...gax.CallOption) (*retailpb.AttributesConfig, 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("/v2/%v:replaceCatalogAttribute", req.GetAttributesConfig())

	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", "attributes_config", url.QueryEscape(req.GetAttributesConfig()))}

	hds = append(c.xGoogHeaders, hds...)
	hds = append(hds, "Content-Type", "application/json")
	headers := gax.BuildHeaders(ctx, hds...)
	opts = append((*c.CallOptions).ReplaceCatalogAttribute[0:len((*c.CallOptions).ReplaceCatalogAttribute):len((*c.CallOptions).ReplaceCatalogAttribute)], opts...)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	resp := &retailpb.AttributesConfig{}
	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

		httpRsp, err := c.httpClient.Do(httpReq)
		if err != nil {
			return err
		}
		defer httpRsp.Body.Close()

		if err = googleapi.CheckResponse(httpRsp); err != nil {
			return err
		}

		buf, err := io.ReadAll(httpRsp.Body)
		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
}

// GetOperation is a utility method from google.longrunning.Operations.
func (c *catalogRESTClient) GetOperation(ctx context.Context, req *longrunningpb.GetOperationRequest, opts ...gax.CallOption) (*longrunningpb.Operation, error) {
	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v2/%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).GetOperation[0:len((*c.CallOptions).GetOperation):len((*c.CallOptions).GetOperation)], opts...)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	resp := &longrunningpb.Operation{}
	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

		httpRsp, err := c.httpClient.Do(httpReq)
		if err != nil {
			return err
		}
		defer httpRsp.Body.Close()

		if err = googleapi.CheckResponse(httpRsp); err != nil {
			return err
		}

		buf, err := io.ReadAll(httpRsp.Body)
		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
}

// ListOperations is a utility method from google.longrunning.Operations.
func (c *catalogRESTClient) ListOperations(ctx context.Context, req *longrunningpb.ListOperationsRequest, opts ...gax.CallOption) *OperationIterator {
	it := &OperationIterator{}
	req = proto.Clone(req).(*longrunningpb.ListOperationsRequest)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	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)
		}
		baseUrl, err := url.Parse(c.endpoint)
		if err != nil {
			return nil, "", err
		}
		baseUrl.Path += fmt.Sprintf("/v2/%v/operations", req.GetName())

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

			httpRsp, err := c.httpClient.Do(httpReq)
			if err != nil {
				return err
			}
			defer httpRsp.Body.Close()

			if err = googleapi.CheckResponse(httpRsp); err != nil {
				return err
			}

			buf, err := io.ReadAll(httpRsp.Body)
			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.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
}
