// 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 generativelanguage

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

	generativelanguagepb "cloud.google.com/go/ai/generativelanguage/apiv1beta/generativelanguagepb"
	"cloud.google.com/go/longrunning"
	lroauto "cloud.google.com/go/longrunning/autogen"
	longrunningpb "cloud.google.com/go/longrunning/autogen/longrunningpb"
	gax "github.com/googleapis/gax-go/v2"
	"google.golang.org/api/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 newModelClientHook clientHook

// ModelCallOptions contains the retry settings for each method of ModelClient.
type ModelCallOptions struct {
	GetModel         []gax.CallOption
	ListModels       []gax.CallOption
	GetTunedModel    []gax.CallOption
	ListTunedModels  []gax.CallOption
	CreateTunedModel []gax.CallOption
	UpdateTunedModel []gax.CallOption
	DeleteTunedModel []gax.CallOption
}

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

func defaultModelCallOptions() *ModelCallOptions {
	return &ModelCallOptions{
		GetModel: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		ListModels: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		GetTunedModel: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		ListTunedModels: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		CreateTunedModel: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		UpdateTunedModel: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		DeleteTunedModel: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
	}
}

func defaultModelRESTCallOptions() *ModelCallOptions {
	return &ModelCallOptions{
		GetModel: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable)
			}),
		},
		ListModels: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable)
			}),
		},
		GetTunedModel: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable)
			}),
		},
		ListTunedModels: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable)
			}),
		},
		CreateTunedModel: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable)
			}),
		},
		UpdateTunedModel: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable)
			}),
		},
		DeleteTunedModel: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable)
			}),
		},
	}
}

// internalModelClient is an interface that defines the methods available from Generative Language API.
type internalModelClient interface {
	Close() error
	setGoogleClientInfo(...string)
	Connection() *grpc.ClientConn
	GetModel(context.Context, *generativelanguagepb.GetModelRequest, ...gax.CallOption) (*generativelanguagepb.Model, error)
	ListModels(context.Context, *generativelanguagepb.ListModelsRequest, ...gax.CallOption) *ModelIterator
	GetTunedModel(context.Context, *generativelanguagepb.GetTunedModelRequest, ...gax.CallOption) (*generativelanguagepb.TunedModel, error)
	ListTunedModels(context.Context, *generativelanguagepb.ListTunedModelsRequest, ...gax.CallOption) *TunedModelIterator
	CreateTunedModel(context.Context, *generativelanguagepb.CreateTunedModelRequest, ...gax.CallOption) (*CreateTunedModelOperation, error)
	CreateTunedModelOperation(name string) *CreateTunedModelOperation
	UpdateTunedModel(context.Context, *generativelanguagepb.UpdateTunedModelRequest, ...gax.CallOption) (*generativelanguagepb.TunedModel, error)
	DeleteTunedModel(context.Context, *generativelanguagepb.DeleteTunedModelRequest, ...gax.CallOption) error
}

// ModelClient is a client for interacting with Generative Language API.
// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
//
// Provides methods for getting metadata information about Generative Models.
type ModelClient struct {
	// The internal transport-dependent client.
	internalClient internalModelClient

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

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

// Wrapper methods routed to the internal client.

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

// GetModel gets information about a specific Model.
func (c *ModelClient) GetModel(ctx context.Context, req *generativelanguagepb.GetModelRequest, opts ...gax.CallOption) (*generativelanguagepb.Model, error) {
	return c.internalClient.GetModel(ctx, req, opts...)
}

// ListModels lists models available through the API.
func (c *ModelClient) ListModels(ctx context.Context, req *generativelanguagepb.ListModelsRequest, opts ...gax.CallOption) *ModelIterator {
	return c.internalClient.ListModels(ctx, req, opts...)
}

// GetTunedModel gets information about a specific TunedModel.
func (c *ModelClient) GetTunedModel(ctx context.Context, req *generativelanguagepb.GetTunedModelRequest, opts ...gax.CallOption) (*generativelanguagepb.TunedModel, error) {
	return c.internalClient.GetTunedModel(ctx, req, opts...)
}

// ListTunedModels lists tuned models owned by the user.
func (c *ModelClient) ListTunedModels(ctx context.Context, req *generativelanguagepb.ListTunedModelsRequest, opts ...gax.CallOption) *TunedModelIterator {
	return c.internalClient.ListTunedModels(ctx, req, opts...)
}

// CreateTunedModel creates a tuned model.
// Intermediate tuning progress (if any) is accessed through the
// [google.longrunning.Operations] service.
//
// Status and results can be accessed through the Operations service.
// Example:
// GET /v1/tunedModels/az2mb0bpw6i/operations/000-111-222
func (c *ModelClient) CreateTunedModel(ctx context.Context, req *generativelanguagepb.CreateTunedModelRequest, opts ...gax.CallOption) (*CreateTunedModelOperation, error) {
	return c.internalClient.CreateTunedModel(ctx, req, opts...)
}

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

// UpdateTunedModel updates a tuned model.
func (c *ModelClient) UpdateTunedModel(ctx context.Context, req *generativelanguagepb.UpdateTunedModelRequest, opts ...gax.CallOption) (*generativelanguagepb.TunedModel, error) {
	return c.internalClient.UpdateTunedModel(ctx, req, opts...)
}

// DeleteTunedModel deletes a tuned model.
func (c *ModelClient) DeleteTunedModel(ctx context.Context, req *generativelanguagepb.DeleteTunedModelRequest, opts ...gax.CallOption) error {
	return c.internalClient.DeleteTunedModel(ctx, req, opts...)
}

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

	// Points back to the CallOptions field of the containing ModelClient
	CallOptions **ModelCallOptions

	// The gRPC API client.
	modelClient generativelanguagepb.ModelServiceClient

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

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

// NewModelClient creates a new model service client based on gRPC.
// The returned client must be Closed when it is done being used to clean up its underlying connections.
//
// Provides methods for getting metadata information about Generative Models.
func NewModelClient(ctx context.Context, opts ...option.ClientOption) (*ModelClient, error) {
	clientOpts := defaultModelGRPCClientOptions()
	if newModelClientHook != nil {
		hookOpts, err := newModelClientHook(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 := ModelClient{CallOptions: defaultModelCallOptions()}

	c := &modelGRPCClient{
		connPool:    connPool,
		modelClient: generativelanguagepb.NewModelServiceClient(connPool),
		CallOptions: &client.CallOptions,
	}
	c.setGoogleClientInfo()

	client.internalClient = c

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

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

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

	// The http client.
	httpClient *http.Client

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

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

	// Points back to the CallOptions field of the containing ModelClient
	CallOptions **ModelCallOptions
}

// NewModelRESTClient creates a new model service rest client.
//
// Provides methods for getting metadata information about Generative Models.
func NewModelRESTClient(ctx context.Context, opts ...option.ClientOption) (*ModelClient, error) {
	clientOpts := append(defaultModelRESTClientOptions(), opts...)
	httpClient, endpoint, err := httptransport.NewClient(ctx, clientOpts...)
	if err != nil {
		return nil, err
	}

	callOpts := defaultModelRESTCallOptions()
	c := &modelRESTClient{
		endpoint:    endpoint,
		httpClient:  httpClient,
		CallOptions: &callOpts,
	}
	c.setGoogleClientInfo()

	lroOpts := []option.ClientOption{
		option.WithHTTPClient(httpClient),
		option.WithEndpoint(endpoint),
	}
	opClient, err := lroauto.NewOperationsRESTClient(ctx, lroOpts...)
	if err != nil {
		return nil, err
	}
	c.LROClient = &opClient

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

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

// 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 *modelRESTClient) 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 *modelRESTClient) 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 *modelRESTClient) Connection() *grpc.ClientConn {
	return nil
}
func (c *modelGRPCClient) GetModel(ctx context.Context, req *generativelanguagepb.GetModelRequest, opts ...gax.CallOption) (*generativelanguagepb.Model, 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).GetModel[0:len((*c.CallOptions).GetModel):len((*c.CallOptions).GetModel)], opts...)
	var resp *generativelanguagepb.Model
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.modelClient.GetModel(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *modelGRPCClient) ListModels(ctx context.Context, req *generativelanguagepb.ListModelsRequest, opts ...gax.CallOption) *ModelIterator {
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, c.xGoogHeaders...)
	opts = append((*c.CallOptions).ListModels[0:len((*c.CallOptions).ListModels):len((*c.CallOptions).ListModels)], opts...)
	it := &ModelIterator{}
	req = proto.Clone(req).(*generativelanguagepb.ListModelsRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*generativelanguagepb.Model, string, error) {
		resp := &generativelanguagepb.ListModelsResponse{}
		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.modelClient.ListModels(ctx, req, settings.GRPC...)
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

		it.Response = resp
		return resp.GetModels(), 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 *modelGRPCClient) GetTunedModel(ctx context.Context, req *generativelanguagepb.GetTunedModelRequest, opts ...gax.CallOption) (*generativelanguagepb.TunedModel, 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).GetTunedModel[0:len((*c.CallOptions).GetTunedModel):len((*c.CallOptions).GetTunedModel)], opts...)
	var resp *generativelanguagepb.TunedModel
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.modelClient.GetTunedModel(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *modelGRPCClient) ListTunedModels(ctx context.Context, req *generativelanguagepb.ListTunedModelsRequest, opts ...gax.CallOption) *TunedModelIterator {
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, c.xGoogHeaders...)
	opts = append((*c.CallOptions).ListTunedModels[0:len((*c.CallOptions).ListTunedModels):len((*c.CallOptions).ListTunedModels)], opts...)
	it := &TunedModelIterator{}
	req = proto.Clone(req).(*generativelanguagepb.ListTunedModelsRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*generativelanguagepb.TunedModel, string, error) {
		resp := &generativelanguagepb.ListTunedModelsResponse{}
		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.modelClient.ListTunedModels(ctx, req, settings.GRPC...)
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

		it.Response = resp
		return resp.GetTunedModels(), 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 *modelGRPCClient) CreateTunedModel(ctx context.Context, req *generativelanguagepb.CreateTunedModelRequest, opts ...gax.CallOption) (*CreateTunedModelOperation, error) {
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, c.xGoogHeaders...)
	opts = append((*c.CallOptions).CreateTunedModel[0:len((*c.CallOptions).CreateTunedModel):len((*c.CallOptions).CreateTunedModel)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.modelClient.CreateTunedModel(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &CreateTunedModelOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *modelGRPCClient) UpdateTunedModel(ctx context.Context, req *generativelanguagepb.UpdateTunedModelRequest, opts ...gax.CallOption) (*generativelanguagepb.TunedModel, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "tuned_model.name", url.QueryEscape(req.GetTunedModel().GetName()))}

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

func (c *modelGRPCClient) DeleteTunedModel(ctx context.Context, req *generativelanguagepb.DeleteTunedModelRequest, 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).DeleteTunedModel[0:len((*c.CallOptions).DeleteTunedModel):len((*c.CallOptions).DeleteTunedModel)], opts...)
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		_, err = c.modelClient.DeleteTunedModel(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	return err
}

// GetModel gets information about a specific Model.
func (c *modelRESTClient) GetModel(ctx context.Context, req *generativelanguagepb.GetModelRequest, opts ...gax.CallOption) (*generativelanguagepb.Model, error) {
	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v1beta/%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).GetModel[0:len((*c.CallOptions).GetModel):len((*c.CallOptions).GetModel)], opts...)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	resp := &generativelanguagepb.Model{}
	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
}

// ListModels lists models available through the API.
func (c *modelRESTClient) ListModels(ctx context.Context, req *generativelanguagepb.ListModelsRequest, opts ...gax.CallOption) *ModelIterator {
	it := &ModelIterator{}
	req = proto.Clone(req).(*generativelanguagepb.ListModelsRequest)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	it.InternalFetch = func(pageSize int, pageToken string) ([]*generativelanguagepb.Model, string, error) {
		resp := &generativelanguagepb.ListModelsResponse{}
		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("/v1beta/models")

		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.GetModels(), 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
}

// GetTunedModel gets information about a specific TunedModel.
func (c *modelRESTClient) GetTunedModel(ctx context.Context, req *generativelanguagepb.GetTunedModelRequest, opts ...gax.CallOption) (*generativelanguagepb.TunedModel, error) {
	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v1beta/%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).GetTunedModel[0:len((*c.CallOptions).GetTunedModel):len((*c.CallOptions).GetTunedModel)], opts...)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	resp := &generativelanguagepb.TunedModel{}
	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
}

// ListTunedModels lists tuned models owned by the user.
func (c *modelRESTClient) ListTunedModels(ctx context.Context, req *generativelanguagepb.ListTunedModelsRequest, opts ...gax.CallOption) *TunedModelIterator {
	it := &TunedModelIterator{}
	req = proto.Clone(req).(*generativelanguagepb.ListTunedModelsRequest)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	it.InternalFetch = func(pageSize int, pageToken string) ([]*generativelanguagepb.TunedModel, string, error) {
		resp := &generativelanguagepb.ListTunedModelsResponse{}
		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("/v1beta/tunedModels")

		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.GetTunedModels(), 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
}

// CreateTunedModel creates a tuned model.
// Intermediate tuning progress (if any) is accessed through the
// [google.longrunning.Operations] service.
//
// Status and results can be accessed through the Operations service.
// Example:
// GET /v1/tunedModels/az2mb0bpw6i/operations/000-111-222
func (c *modelRESTClient) CreateTunedModel(ctx context.Context, req *generativelanguagepb.CreateTunedModelRequest, opts ...gax.CallOption) (*CreateTunedModelOperation, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	body := req.GetTunedModel()
	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("/v1beta/tunedModels")

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

	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...)
	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("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
	}

	override := fmt.Sprintf("/v1beta/%s", resp.GetName())
	return &CreateTunedModelOperation{
		lro:      longrunning.InternalNewOperation(*c.LROClient, resp),
		pollPath: override,
	}, nil
}

// UpdateTunedModel updates a tuned model.
func (c *modelRESTClient) UpdateTunedModel(ctx context.Context, req *generativelanguagepb.UpdateTunedModelRequest, opts ...gax.CallOption) (*generativelanguagepb.TunedModel, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	body := req.GetTunedModel()
	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("/v1beta/%v", req.GetTunedModel().GetName())

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

	baseUrl.RawQuery = params.Encode()

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

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

// DeleteTunedModel deletes a tuned model.
func (c *modelRESTClient) DeleteTunedModel(ctx context.Context, req *generativelanguagepb.DeleteTunedModelRequest, opts ...gax.CallOption) error {
	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return err
	}
	baseUrl.Path += fmt.Sprintf("/v1beta/%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

		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...)
}

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

// CreateTunedModelOperation returns a new CreateTunedModelOperation from a given name.
// The name must be that of a previously created CreateTunedModelOperation, possibly from a different process.
func (c *modelRESTClient) CreateTunedModelOperation(name string) *CreateTunedModelOperation {
	override := fmt.Sprintf("/v1beta/%s", name)
	return &CreateTunedModelOperation{
		lro:      longrunning.InternalNewOperation(*c.LROClient, &longrunningpb.Operation{Name: name}),
		pollPath: override,
	}
}