// 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"
	"errors"
	"fmt"
	"io"
	"math"
	"net/http"
	"net/url"
	"time"

	generativelanguagepb "cloud.google.com/go/ai/generativelanguage/apiv1beta/generativelanguagepb"
	gax "github.com/googleapis/gax-go/v2"
	"google.golang.org/api/googleapi"
	"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/grpc/metadata"
	"google.golang.org/protobuf/encoding/protojson"
)

var newGenerativeClientHook clientHook

// GenerativeCallOptions contains the retry settings for each method of GenerativeClient.
type GenerativeCallOptions struct {
	GenerateContent       []gax.CallOption
	GenerateAnswer        []gax.CallOption
	StreamGenerateContent []gax.CallOption
	EmbedContent          []gax.CallOption
	BatchEmbedContents    []gax.CallOption
	CountTokens           []gax.CallOption
}

func defaultGenerativeGRPCClientOptions() []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 defaultGenerativeCallOptions() *GenerativeCallOptions {
	return &GenerativeCallOptions{
		GenerateContent: []gax.CallOption{
			gax.WithTimeout(600000 * 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,
				})
			}),
		},
		GenerateAnswer: []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,
				})
			}),
		},
		StreamGenerateContent: []gax.CallOption{
			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,
				})
			}),
		},
		EmbedContent: []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,
				})
			}),
		},
		BatchEmbedContents: []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,
				})
			}),
		},
		CountTokens: []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 defaultGenerativeRESTCallOptions() *GenerativeCallOptions {
	return &GenerativeCallOptions{
		GenerateContent: []gax.CallOption{
			gax.WithTimeout(600000 * 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)
			}),
		},
		GenerateAnswer: []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)
			}),
		},
		StreamGenerateContent: []gax.CallOption{
			gax.WithTimeout(600000 * 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)
			}),
		},
		EmbedContent: []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)
			}),
		},
		BatchEmbedContents: []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)
			}),
		},
		CountTokens: []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)
			}),
		},
	}
}

// internalGenerativeClient is an interface that defines the methods available from Generative Language API.
type internalGenerativeClient interface {
	Close() error
	setGoogleClientInfo(...string)
	Connection() *grpc.ClientConn
	GenerateContent(context.Context, *generativelanguagepb.GenerateContentRequest, ...gax.CallOption) (*generativelanguagepb.GenerateContentResponse, error)
	GenerateAnswer(context.Context, *generativelanguagepb.GenerateAnswerRequest, ...gax.CallOption) (*generativelanguagepb.GenerateAnswerResponse, error)
	StreamGenerateContent(context.Context, *generativelanguagepb.GenerateContentRequest, ...gax.CallOption) (generativelanguagepb.GenerativeService_StreamGenerateContentClient, error)
	EmbedContent(context.Context, *generativelanguagepb.EmbedContentRequest, ...gax.CallOption) (*generativelanguagepb.EmbedContentResponse, error)
	BatchEmbedContents(context.Context, *generativelanguagepb.BatchEmbedContentsRequest, ...gax.CallOption) (*generativelanguagepb.BatchEmbedContentsResponse, error)
	CountTokens(context.Context, *generativelanguagepb.CountTokensRequest, ...gax.CallOption) (*generativelanguagepb.CountTokensResponse, error)
}

// GenerativeClient 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.
//
// API for using Large Models that generate multimodal content and have
// additional capabilities beyond text generation.
type GenerativeClient struct {
	// The internal transport-dependent client.
	internalClient internalGenerativeClient

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

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

// GenerateContent generates a response from the model given an input
// GenerateContentRequest.
//
// Input capabilities differ between models, including tuned models. See the
// model guide (at https://ai.google.dev/models/gemini) and
// tuning guide (at https://ai.google.dev/docs/model_tuning_guidance) for
// details.
func (c *GenerativeClient) GenerateContent(ctx context.Context, req *generativelanguagepb.GenerateContentRequest, opts ...gax.CallOption) (*generativelanguagepb.GenerateContentResponse, error) {
	return c.internalClient.GenerateContent(ctx, req, opts...)
}

// GenerateAnswer generates a grounded answer from the model given an input
// GenerateAnswerRequest.
func (c *GenerativeClient) GenerateAnswer(ctx context.Context, req *generativelanguagepb.GenerateAnswerRequest, opts ...gax.CallOption) (*generativelanguagepb.GenerateAnswerResponse, error) {
	return c.internalClient.GenerateAnswer(ctx, req, opts...)
}

// StreamGenerateContent generates a streamed response from the model given an input
// GenerateContentRequest.
func (c *GenerativeClient) StreamGenerateContent(ctx context.Context, req *generativelanguagepb.GenerateContentRequest, opts ...gax.CallOption) (generativelanguagepb.GenerativeService_StreamGenerateContentClient, error) {
	return c.internalClient.StreamGenerateContent(ctx, req, opts...)
}

// EmbedContent generates an embedding from the model given an input Content.
func (c *GenerativeClient) EmbedContent(ctx context.Context, req *generativelanguagepb.EmbedContentRequest, opts ...gax.CallOption) (*generativelanguagepb.EmbedContentResponse, error) {
	return c.internalClient.EmbedContent(ctx, req, opts...)
}

// BatchEmbedContents generates multiple embeddings from the model given input text in a
// synchronous call.
func (c *GenerativeClient) BatchEmbedContents(ctx context.Context, req *generativelanguagepb.BatchEmbedContentsRequest, opts ...gax.CallOption) (*generativelanguagepb.BatchEmbedContentsResponse, error) {
	return c.internalClient.BatchEmbedContents(ctx, req, opts...)
}

// CountTokens runs a model’s tokenizer on input content and returns the token count.
func (c *GenerativeClient) CountTokens(ctx context.Context, req *generativelanguagepb.CountTokensRequest, opts ...gax.CallOption) (*generativelanguagepb.CountTokensResponse, error) {
	return c.internalClient.CountTokens(ctx, req, opts...)
}

// generativeGRPCClient 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 generativeGRPCClient struct {
	// Connection pool of gRPC connections to the service.
	connPool gtransport.ConnPool

	// Points back to the CallOptions field of the containing GenerativeClient
	CallOptions **GenerativeCallOptions

	// The gRPC API client.
	generativeClient generativelanguagepb.GenerativeServiceClient

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

// NewGenerativeClient creates a new generative service client based on gRPC.
// The returned client must be Closed when it is done being used to clean up its underlying connections.
//
// API for using Large Models that generate multimodal content and have
// additional capabilities beyond text generation.
func NewGenerativeClient(ctx context.Context, opts ...option.ClientOption) (*GenerativeClient, error) {
	clientOpts := defaultGenerativeGRPCClientOptions()
	if newGenerativeClientHook != nil {
		hookOpts, err := newGenerativeClientHook(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 := GenerativeClient{CallOptions: defaultGenerativeCallOptions()}

	c := &generativeGRPCClient{
		connPool:         connPool,
		generativeClient: generativelanguagepb.NewGenerativeServiceClient(connPool),
		CallOptions:      &client.CallOptions,
	}
	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 *generativeGRPCClient) 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 *generativeGRPCClient) 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 *generativeGRPCClient) Close() error {
	return c.connPool.Close()
}

// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
type generativeRESTClient 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 GenerativeClient
	CallOptions **GenerativeCallOptions
}

// NewGenerativeRESTClient creates a new generative service rest client.
//
// API for using Large Models that generate multimodal content and have
// additional capabilities beyond text generation.
func NewGenerativeRESTClient(ctx context.Context, opts ...option.ClientOption) (*GenerativeClient, error) {
	clientOpts := append(defaultGenerativeRESTClientOptions(), opts...)
	httpClient, endpoint, err := httptransport.NewClient(ctx, clientOpts...)
	if err != nil {
		return nil, err
	}

	callOpts := defaultGenerativeRESTCallOptions()
	c := &generativeRESTClient{
		endpoint:    endpoint,
		httpClient:  httpClient,
		CallOptions: &callOpts,
	}
	c.setGoogleClientInfo()

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

func defaultGenerativeRESTClientOptions() []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 *generativeRESTClient) 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 *generativeRESTClient) 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 *generativeRESTClient) Connection() *grpc.ClientConn {
	return nil
}
func (c *generativeGRPCClient) GenerateContent(ctx context.Context, req *generativelanguagepb.GenerateContentRequest, opts ...gax.CallOption) (*generativelanguagepb.GenerateContentResponse, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "model", url.QueryEscape(req.GetModel()))}

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

func (c *generativeGRPCClient) GenerateAnswer(ctx context.Context, req *generativelanguagepb.GenerateAnswerRequest, opts ...gax.CallOption) (*generativelanguagepb.GenerateAnswerResponse, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "model", url.QueryEscape(req.GetModel()))}

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

func (c *generativeGRPCClient) StreamGenerateContent(ctx context.Context, req *generativelanguagepb.GenerateContentRequest, opts ...gax.CallOption) (generativelanguagepb.GenerativeService_StreamGenerateContentClient, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "model", url.QueryEscape(req.GetModel()))}

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

func (c *generativeGRPCClient) EmbedContent(ctx context.Context, req *generativelanguagepb.EmbedContentRequest, opts ...gax.CallOption) (*generativelanguagepb.EmbedContentResponse, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "model", url.QueryEscape(req.GetModel()))}

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

func (c *generativeGRPCClient) BatchEmbedContents(ctx context.Context, req *generativelanguagepb.BatchEmbedContentsRequest, opts ...gax.CallOption) (*generativelanguagepb.BatchEmbedContentsResponse, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "model", url.QueryEscape(req.GetModel()))}

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

func (c *generativeGRPCClient) CountTokens(ctx context.Context, req *generativelanguagepb.CountTokensRequest, opts ...gax.CallOption) (*generativelanguagepb.CountTokensResponse, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "model", url.QueryEscape(req.GetModel()))}

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

// GenerateContent generates a response from the model given an input
// GenerateContentRequest.
//
// Input capabilities differ between models, including tuned models. See the
// model guide (at https://ai.google.dev/models/gemini) and
// tuning guide (at https://ai.google.dev/docs/model_tuning_guidance) for
// details.
func (c *generativeRESTClient) GenerateContent(ctx context.Context, req *generativelanguagepb.GenerateContentRequest, opts ...gax.CallOption) (*generativelanguagepb.GenerateContentResponse, 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("/v1beta/%v:generateContent", req.GetModel())

	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", "model", url.QueryEscape(req.GetModel()))}

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

// GenerateAnswer generates a grounded answer from the model given an input
// GenerateAnswerRequest.
func (c *generativeRESTClient) GenerateAnswer(ctx context.Context, req *generativelanguagepb.GenerateAnswerRequest, opts ...gax.CallOption) (*generativelanguagepb.GenerateAnswerResponse, 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("/v1beta/%v:generateAnswer", req.GetModel())

	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", "model", url.QueryEscape(req.GetModel()))}

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

// StreamGenerateContent generates a streamed response from the model given an input
// GenerateContentRequest.
func (c *generativeRESTClient) StreamGenerateContent(ctx context.Context, req *generativelanguagepb.GenerateContentRequest, opts ...gax.CallOption) (generativelanguagepb.GenerativeService_StreamGenerateContentClient, 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("/v1beta/%v:streamGenerateContent", req.GetModel())

	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", "model", url.QueryEscape(req.GetModel()))}

	hds = append(c.xGoogHeaders, hds...)
	hds = append(hds, "Content-Type", "application/json")
	headers := gax.BuildHeaders(ctx, hds...)
	var streamClient *streamGenerateContentRESTClient
	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
		}

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

		streamClient = &streamGenerateContentRESTClient{
			ctx:    ctx,
			md:     metadata.MD(httpRsp.Header),
			stream: gax.NewProtoJSONStreamReader(httpRsp.Body, (&generativelanguagepb.GenerateContentResponse{}).ProtoReflect().Type()),
		}
		return nil
	}, opts...)

	return streamClient, e
}

// streamGenerateContentRESTClient is the stream client used to consume the server stream created by
// the REST implementation of StreamGenerateContent.
type streamGenerateContentRESTClient struct {
	ctx    context.Context
	md     metadata.MD
	stream *gax.ProtoJSONStream
}

func (c *streamGenerateContentRESTClient) Recv() (*generativelanguagepb.GenerateContentResponse, error) {
	if err := c.ctx.Err(); err != nil {
		defer c.stream.Close()
		return nil, err
	}
	msg, err := c.stream.Recv()
	if err != nil {
		defer c.stream.Close()
		return nil, err
	}
	res := msg.(*generativelanguagepb.GenerateContentResponse)
	return res, nil
}

func (c *streamGenerateContentRESTClient) Header() (metadata.MD, error) {
	return c.md, nil
}

func (c *streamGenerateContentRESTClient) Trailer() metadata.MD {
	return c.md
}

func (c *streamGenerateContentRESTClient) CloseSend() error {
	// This is a no-op to fulfill the interface.
	return errors.New("this method is not implemented for a server-stream")
}

func (c *streamGenerateContentRESTClient) Context() context.Context {
	return c.ctx
}

func (c *streamGenerateContentRESTClient) SendMsg(m interface{}) error {
	// This is a no-op to fulfill the interface.
	return errors.New("this method is not implemented for a server-stream")
}

func (c *streamGenerateContentRESTClient) RecvMsg(m interface{}) error {
	// This is a no-op to fulfill the interface.
	return errors.New("this method is not implemented, use Recv")
}

// EmbedContent generates an embedding from the model given an input Content.
func (c *generativeRESTClient) EmbedContent(ctx context.Context, req *generativelanguagepb.EmbedContentRequest, opts ...gax.CallOption) (*generativelanguagepb.EmbedContentResponse, 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("/v1beta/%v:embedContent", req.GetModel())

	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", "model", url.QueryEscape(req.GetModel()))}

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

// BatchEmbedContents generates multiple embeddings from the model given input text in a
// synchronous call.
func (c *generativeRESTClient) BatchEmbedContents(ctx context.Context, req *generativelanguagepb.BatchEmbedContentsRequest, opts ...gax.CallOption) (*generativelanguagepb.BatchEmbedContentsResponse, 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("/v1beta/%v:batchEmbedContents", req.GetModel())

	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", "model", url.QueryEscape(req.GetModel()))}

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

// CountTokens runs a model’s tokenizer on input content and returns the token count.
func (c *generativeRESTClient) CountTokens(ctx context.Context, req *generativelanguagepb.CountTokensRequest, opts ...gax.CallOption) (*generativelanguagepb.CountTokensResponse, 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("/v1beta/%v:countTokens", req.GetModel())

	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", "model", url.QueryEscape(req.GetModel()))}

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