// Copyright 2022 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 livestream

import (
	"context"
	"fmt"
	"math"
	"net/url"
	"time"

	"cloud.google.com/go/longrunning"
	lroauto "cloud.google.com/go/longrunning/autogen"
	gax "github.com/googleapis/gax-go/v2"
	"google.golang.org/api/iterator"
	"google.golang.org/api/option"
	"google.golang.org/api/option/internaloption"
	gtransport "google.golang.org/api/transport/grpc"
	livestreampb "google.golang.org/genproto/googleapis/cloud/video/livestream/v1"
	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
	"google.golang.org/grpc"
	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/metadata"
	"google.golang.org/protobuf/proto"
)

var newClientHook clientHook

// CallOptions contains the retry settings for each method of Client.
type CallOptions struct {
	CreateChannel []gax.CallOption
	ListChannels  []gax.CallOption
	GetChannel    []gax.CallOption
	DeleteChannel []gax.CallOption
	UpdateChannel []gax.CallOption
	StartChannel  []gax.CallOption
	StopChannel   []gax.CallOption
	CreateInput   []gax.CallOption
	ListInputs    []gax.CallOption
	GetInput      []gax.CallOption
	DeleteInput   []gax.CallOption
	UpdateInput   []gax.CallOption
	CreateEvent   []gax.CallOption
	ListEvents    []gax.CallOption
	GetEvent      []gax.CallOption
	DeleteEvent   []gax.CallOption
}

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

func defaultCallOptions() *CallOptions {
	return &CallOptions{
		CreateChannel: []gax.CallOption{},
		ListChannels: []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,
				})
			}),
		},
		GetChannel: []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,
				})
			}),
		},
		DeleteChannel: []gax.CallOption{},
		UpdateChannel: []gax.CallOption{},
		StartChannel:  []gax.CallOption{},
		StopChannel:   []gax.CallOption{},
		CreateInput:   []gax.CallOption{},
		ListInputs: []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,
				})
			}),
		},
		GetInput: []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,
				})
			}),
		},
		DeleteInput: []gax.CallOption{},
		UpdateInput: []gax.CallOption{},
		CreateEvent: []gax.CallOption{},
		ListEvents: []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,
				})
			}),
		},
		GetEvent: []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,
				})
			}),
		},
		DeleteEvent: []gax.CallOption{},
	}
}

// internalClient is an interface that defines the methods availaible from Live Stream API.
type internalClient interface {
	Close() error
	setGoogleClientInfo(...string)
	Connection() *grpc.ClientConn
	CreateChannel(context.Context, *livestreampb.CreateChannelRequest, ...gax.CallOption) (*CreateChannelOperation, error)
	CreateChannelOperation(name string) *CreateChannelOperation
	ListChannels(context.Context, *livestreampb.ListChannelsRequest, ...gax.CallOption) *ChannelIterator
	GetChannel(context.Context, *livestreampb.GetChannelRequest, ...gax.CallOption) (*livestreampb.Channel, error)
	DeleteChannel(context.Context, *livestreampb.DeleteChannelRequest, ...gax.CallOption) (*DeleteChannelOperation, error)
	DeleteChannelOperation(name string) *DeleteChannelOperation
	UpdateChannel(context.Context, *livestreampb.UpdateChannelRequest, ...gax.CallOption) (*UpdateChannelOperation, error)
	UpdateChannelOperation(name string) *UpdateChannelOperation
	StartChannel(context.Context, *livestreampb.StartChannelRequest, ...gax.CallOption) (*StartChannelOperation, error)
	StartChannelOperation(name string) *StartChannelOperation
	StopChannel(context.Context, *livestreampb.StopChannelRequest, ...gax.CallOption) (*StopChannelOperation, error)
	StopChannelOperation(name string) *StopChannelOperation
	CreateInput(context.Context, *livestreampb.CreateInputRequest, ...gax.CallOption) (*CreateInputOperation, error)
	CreateInputOperation(name string) *CreateInputOperation
	ListInputs(context.Context, *livestreampb.ListInputsRequest, ...gax.CallOption) *InputIterator
	GetInput(context.Context, *livestreampb.GetInputRequest, ...gax.CallOption) (*livestreampb.Input, error)
	DeleteInput(context.Context, *livestreampb.DeleteInputRequest, ...gax.CallOption) (*DeleteInputOperation, error)
	DeleteInputOperation(name string) *DeleteInputOperation
	UpdateInput(context.Context, *livestreampb.UpdateInputRequest, ...gax.CallOption) (*UpdateInputOperation, error)
	UpdateInputOperation(name string) *UpdateInputOperation
	CreateEvent(context.Context, *livestreampb.CreateEventRequest, ...gax.CallOption) (*livestreampb.Event, error)
	ListEvents(context.Context, *livestreampb.ListEventsRequest, ...gax.CallOption) *EventIterator
	GetEvent(context.Context, *livestreampb.GetEventRequest, ...gax.CallOption) (*livestreampb.Event, error)
	DeleteEvent(context.Context, *livestreampb.DeleteEventRequest, ...gax.CallOption) error
}

// Client is a client for interacting with Live Stream API.
// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
//
// Using Live Stream API, you can generate live streams in the various
// renditions and streaming formats. The streaming format include HTTP Live
// Streaming (HLS) and Dynamic Adaptive Streaming over HTTP (DASH). You can send
// a source stream in the various ways, including Real-Time Messaging
// Protocol (RTMP) and Secure Reliable Transport (SRT).
type Client struct {
	// The internal transport-dependent client.
	internalClient internalClient

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

	// 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 *Client) 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 *Client) setGoogleClientInfo(keyval ...string) {
	c.internalClient.setGoogleClientInfo(keyval...)
}

// Connection returns a connection to the API service.
//
// Deprecated.
func (c *Client) Connection() *grpc.ClientConn {
	return c.internalClient.Connection()
}

// CreateChannel creates a channel with the provided unique ID in the specified
// region.
func (c *Client) CreateChannel(ctx context.Context, req *livestreampb.CreateChannelRequest, opts ...gax.CallOption) (*CreateChannelOperation, error) {
	return c.internalClient.CreateChannel(ctx, req, opts...)
}

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

// ListChannels returns a list of all channels in the specified region.
func (c *Client) ListChannels(ctx context.Context, req *livestreampb.ListChannelsRequest, opts ...gax.CallOption) *ChannelIterator {
	return c.internalClient.ListChannels(ctx, req, opts...)
}

// GetChannel returns the specified channel.
func (c *Client) GetChannel(ctx context.Context, req *livestreampb.GetChannelRequest, opts ...gax.CallOption) (*livestreampb.Channel, error) {
	return c.internalClient.GetChannel(ctx, req, opts...)
}

// DeleteChannel deletes the specified channel.
func (c *Client) DeleteChannel(ctx context.Context, req *livestreampb.DeleteChannelRequest, opts ...gax.CallOption) (*DeleteChannelOperation, error) {
	return c.internalClient.DeleteChannel(ctx, req, opts...)
}

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

// UpdateChannel updates the specified channel.
func (c *Client) UpdateChannel(ctx context.Context, req *livestreampb.UpdateChannelRequest, opts ...gax.CallOption) (*UpdateChannelOperation, error) {
	return c.internalClient.UpdateChannel(ctx, req, opts...)
}

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

// StartChannel starts the specified channel. Part of the video pipeline will be created
// only when the StartChannel request is received by the server.
func (c *Client) StartChannel(ctx context.Context, req *livestreampb.StartChannelRequest, opts ...gax.CallOption) (*StartChannelOperation, error) {
	return c.internalClient.StartChannel(ctx, req, opts...)
}

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

// StopChannel stops the specified channel. Part of the video pipeline will be released
// when the StopChannel request is received by the server.
func (c *Client) StopChannel(ctx context.Context, req *livestreampb.StopChannelRequest, opts ...gax.CallOption) (*StopChannelOperation, error) {
	return c.internalClient.StopChannel(ctx, req, opts...)
}

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

// CreateInput creates an input with the provided unique ID in the specified region.
func (c *Client) CreateInput(ctx context.Context, req *livestreampb.CreateInputRequest, opts ...gax.CallOption) (*CreateInputOperation, error) {
	return c.internalClient.CreateInput(ctx, req, opts...)
}

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

// ListInputs returns a list of all inputs in the specified region.
func (c *Client) ListInputs(ctx context.Context, req *livestreampb.ListInputsRequest, opts ...gax.CallOption) *InputIterator {
	return c.internalClient.ListInputs(ctx, req, opts...)
}

// GetInput returns the specified input.
func (c *Client) GetInput(ctx context.Context, req *livestreampb.GetInputRequest, opts ...gax.CallOption) (*livestreampb.Input, error) {
	return c.internalClient.GetInput(ctx, req, opts...)
}

// DeleteInput deletes the specified input.
func (c *Client) DeleteInput(ctx context.Context, req *livestreampb.DeleteInputRequest, opts ...gax.CallOption) (*DeleteInputOperation, error) {
	return c.internalClient.DeleteInput(ctx, req, opts...)
}

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

// UpdateInput updates the specified input.
func (c *Client) UpdateInput(ctx context.Context, req *livestreampb.UpdateInputRequest, opts ...gax.CallOption) (*UpdateInputOperation, error) {
	return c.internalClient.UpdateInput(ctx, req, opts...)
}

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

// CreateEvent creates an event with the provided unique ID in the specified channel.
func (c *Client) CreateEvent(ctx context.Context, req *livestreampb.CreateEventRequest, opts ...gax.CallOption) (*livestreampb.Event, error) {
	return c.internalClient.CreateEvent(ctx, req, opts...)
}

// ListEvents returns a list of all events in the specified channel.
func (c *Client) ListEvents(ctx context.Context, req *livestreampb.ListEventsRequest, opts ...gax.CallOption) *EventIterator {
	return c.internalClient.ListEvents(ctx, req, opts...)
}

// GetEvent returns the specified event.
func (c *Client) GetEvent(ctx context.Context, req *livestreampb.GetEventRequest, opts ...gax.CallOption) (*livestreampb.Event, error) {
	return c.internalClient.GetEvent(ctx, req, opts...)
}

// DeleteEvent deletes the specified event.
func (c *Client) DeleteEvent(ctx context.Context, req *livestreampb.DeleteEventRequest, opts ...gax.CallOption) error {
	return c.internalClient.DeleteEvent(ctx, req, opts...)
}

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

	// flag to opt out of default deadlines via GOOGLE_API_GO_EXPERIMENTAL_DISABLE_DEFAULT_DEADLINE
	disableDeadlines bool

	// Points back to the CallOptions field of the containing Client
	CallOptions **CallOptions

	// The gRPC API client.
	client livestreampb.LivestreamServiceClient

	// 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.
	xGoogMetadata metadata.MD
}

// NewClient creates a new livestream service client based on gRPC.
// The returned client must be Closed when it is done being used to clean up its underlying connections.
//
// Using Live Stream API, you can generate live streams in the various
// renditions and streaming formats. The streaming format include HTTP Live
// Streaming (HLS) and Dynamic Adaptive Streaming over HTTP (DASH). You can send
// a source stream in the various ways, including Real-Time Messaging
// Protocol (RTMP) and Secure Reliable Transport (SRT).
func NewClient(ctx context.Context, opts ...option.ClientOption) (*Client, error) {
	clientOpts := defaultGRPCClientOptions()
	if newClientHook != nil {
		hookOpts, err := newClientHook(ctx, clientHookParams{})
		if err != nil {
			return nil, err
		}
		clientOpts = append(clientOpts, hookOpts...)
	}

	disableDeadlines, err := checkDisableDeadlines()
	if err != nil {
		return nil, err
	}

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

	c := &gRPCClient{
		connPool:         connPool,
		disableDeadlines: disableDeadlines,
		client:           livestreampb.NewLivestreamServiceClient(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.
func (c *gRPCClient) 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 *gRPCClient) setGoogleClientInfo(keyval ...string) {
	kv := append([]string{"gl-go", versionGo()}, keyval...)
	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
	c.xGoogMetadata = metadata.Pairs("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 *gRPCClient) Close() error {
	return c.connPool.Close()
}

func (c *gRPCClient) CreateChannel(ctx context.Context, req *livestreampb.CreateChannelRequest, opts ...gax.CallOption) (*CreateChannelOperation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 60000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).CreateChannel[0:len((*c.CallOptions).CreateChannel):len((*c.CallOptions).CreateChannel)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.CreateChannel(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &CreateChannelOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *gRPCClient) ListChannels(ctx context.Context, req *livestreampb.ListChannelsRequest, opts ...gax.CallOption) *ChannelIterator {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).ListChannels[0:len((*c.CallOptions).ListChannels):len((*c.CallOptions).ListChannels)], opts...)
	it := &ChannelIterator{}
	req = proto.Clone(req).(*livestreampb.ListChannelsRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*livestreampb.Channel, string, error) {
		resp := &livestreampb.ListChannelsResponse{}
		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.client.ListChannels(ctx, req, settings.GRPC...)
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

		it.Response = resp
		return resp.GetChannels(), 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 *gRPCClient) GetChannel(ctx context.Context, req *livestreampb.GetChannelRequest, opts ...gax.CallOption) (*livestreampb.Channel, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 60000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).GetChannel[0:len((*c.CallOptions).GetChannel):len((*c.CallOptions).GetChannel)], opts...)
	var resp *livestreampb.Channel
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.GetChannel(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *gRPCClient) DeleteChannel(ctx context.Context, req *livestreampb.DeleteChannelRequest, opts ...gax.CallOption) (*DeleteChannelOperation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 60000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).DeleteChannel[0:len((*c.CallOptions).DeleteChannel):len((*c.CallOptions).DeleteChannel)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.DeleteChannel(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &DeleteChannelOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *gRPCClient) UpdateChannel(ctx context.Context, req *livestreampb.UpdateChannelRequest, opts ...gax.CallOption) (*UpdateChannelOperation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 60000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "channel.name", url.QueryEscape(req.GetChannel().GetName())))
	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).UpdateChannel[0:len((*c.CallOptions).UpdateChannel):len((*c.CallOptions).UpdateChannel)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.UpdateChannel(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &UpdateChannelOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *gRPCClient) StartChannel(ctx context.Context, req *livestreampb.StartChannelRequest, opts ...gax.CallOption) (*StartChannelOperation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 60000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).StartChannel[0:len((*c.CallOptions).StartChannel):len((*c.CallOptions).StartChannel)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.StartChannel(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &StartChannelOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *gRPCClient) StopChannel(ctx context.Context, req *livestreampb.StopChannelRequest, opts ...gax.CallOption) (*StopChannelOperation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 60000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).StopChannel[0:len((*c.CallOptions).StopChannel):len((*c.CallOptions).StopChannel)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.StopChannel(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &StopChannelOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *gRPCClient) CreateInput(ctx context.Context, req *livestreampb.CreateInputRequest, opts ...gax.CallOption) (*CreateInputOperation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 60000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).CreateInput[0:len((*c.CallOptions).CreateInput):len((*c.CallOptions).CreateInput)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.CreateInput(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &CreateInputOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *gRPCClient) ListInputs(ctx context.Context, req *livestreampb.ListInputsRequest, opts ...gax.CallOption) *InputIterator {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).ListInputs[0:len((*c.CallOptions).ListInputs):len((*c.CallOptions).ListInputs)], opts...)
	it := &InputIterator{}
	req = proto.Clone(req).(*livestreampb.ListInputsRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*livestreampb.Input, string, error) {
		resp := &livestreampb.ListInputsResponse{}
		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.client.ListInputs(ctx, req, settings.GRPC...)
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

		it.Response = resp
		return resp.GetInputs(), 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 *gRPCClient) GetInput(ctx context.Context, req *livestreampb.GetInputRequest, opts ...gax.CallOption) (*livestreampb.Input, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 60000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).GetInput[0:len((*c.CallOptions).GetInput):len((*c.CallOptions).GetInput)], opts...)
	var resp *livestreampb.Input
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.GetInput(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *gRPCClient) DeleteInput(ctx context.Context, req *livestreampb.DeleteInputRequest, opts ...gax.CallOption) (*DeleteInputOperation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 60000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).DeleteInput[0:len((*c.CallOptions).DeleteInput):len((*c.CallOptions).DeleteInput)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.DeleteInput(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &DeleteInputOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *gRPCClient) UpdateInput(ctx context.Context, req *livestreampb.UpdateInputRequest, opts ...gax.CallOption) (*UpdateInputOperation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 60000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "input.name", url.QueryEscape(req.GetInput().GetName())))
	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).UpdateInput[0:len((*c.CallOptions).UpdateInput):len((*c.CallOptions).UpdateInput)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.UpdateInput(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &UpdateInputOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *gRPCClient) CreateEvent(ctx context.Context, req *livestreampb.CreateEventRequest, opts ...gax.CallOption) (*livestreampb.Event, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 60000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).CreateEvent[0:len((*c.CallOptions).CreateEvent):len((*c.CallOptions).CreateEvent)], opts...)
	var resp *livestreampb.Event
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.CreateEvent(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *gRPCClient) ListEvents(ctx context.Context, req *livestreampb.ListEventsRequest, opts ...gax.CallOption) *EventIterator {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).ListEvents[0:len((*c.CallOptions).ListEvents):len((*c.CallOptions).ListEvents)], opts...)
	it := &EventIterator{}
	req = proto.Clone(req).(*livestreampb.ListEventsRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*livestreampb.Event, string, error) {
		resp := &livestreampb.ListEventsResponse{}
		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.client.ListEvents(ctx, req, settings.GRPC...)
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

		it.Response = resp
		return resp.GetEvents(), 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 *gRPCClient) GetEvent(ctx context.Context, req *livestreampb.GetEventRequest, opts ...gax.CallOption) (*livestreampb.Event, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 60000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).GetEvent[0:len((*c.CallOptions).GetEvent):len((*c.CallOptions).GetEvent)], opts...)
	var resp *livestreampb.Event
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.GetEvent(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *gRPCClient) DeleteEvent(ctx context.Context, req *livestreampb.DeleteEventRequest, opts ...gax.CallOption) error {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 60000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).DeleteEvent[0:len((*c.CallOptions).DeleteEvent):len((*c.CallOptions).DeleteEvent)], opts...)
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		_, err = c.client.DeleteEvent(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	return err
}

// CreateChannelOperation manages a long-running operation from CreateChannel.
type CreateChannelOperation struct {
	lro *longrunning.Operation
}

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

// Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
//
// See documentation of Poll for error-handling information.
func (op *CreateChannelOperation) Wait(ctx context.Context, opts ...gax.CallOption) (*livestreampb.Channel, error) {
	var resp livestreampb.Channel
	if err := op.lro.WaitWithInterval(ctx, &resp, time.Minute, opts...); err != nil {
		return nil, err
	}
	return &resp, nil
}

// Poll fetches the latest state of the long-running operation.
//
// Poll also fetches the latest metadata, which can be retrieved by Metadata.
//
// If Poll fails, the error is returned and op is unmodified. If Poll succeeds and
// the operation has completed with failure, the error is returned and op.Done will return true.
// If Poll succeeds and the operation has completed successfully,
// op.Done will return true, and the response of the operation is returned.
// If Poll succeeds and the operation has not completed, the returned response and error are both nil.
func (op *CreateChannelOperation) Poll(ctx context.Context, opts ...gax.CallOption) (*livestreampb.Channel, error) {
	var resp livestreampb.Channel
	if err := op.lro.Poll(ctx, &resp, opts...); err != nil {
		return nil, err
	}
	if !op.Done() {
		return nil, nil
	}
	return &resp, nil
}

// Metadata returns metadata associated with the long-running operation.
// Metadata itself does not contact the server, but Poll does.
// To get the latest metadata, call this method after a successful call to Poll.
// If the metadata is not available, the returned metadata and error are both nil.
func (op *CreateChannelOperation) Metadata() (*livestreampb.OperationMetadata, error) {
	var meta livestreampb.OperationMetadata
	if err := op.lro.Metadata(&meta); err == longrunning.ErrNoMetadata {
		return nil, nil
	} else if err != nil {
		return nil, err
	}
	return &meta, nil
}

// Done reports whether the long-running operation has completed.
func (op *CreateChannelOperation) Done() bool {
	return op.lro.Done()
}

// Name returns the name of the long-running operation.
// The name is assigned by the server and is unique within the service from which the operation is created.
func (op *CreateChannelOperation) Name() string {
	return op.lro.Name()
}

// CreateInputOperation manages a long-running operation from CreateInput.
type CreateInputOperation struct {
	lro *longrunning.Operation
}

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

// Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
//
// See documentation of Poll for error-handling information.
func (op *CreateInputOperation) Wait(ctx context.Context, opts ...gax.CallOption) (*livestreampb.Input, error) {
	var resp livestreampb.Input
	if err := op.lro.WaitWithInterval(ctx, &resp, time.Minute, opts...); err != nil {
		return nil, err
	}
	return &resp, nil
}

// Poll fetches the latest state of the long-running operation.
//
// Poll also fetches the latest metadata, which can be retrieved by Metadata.
//
// If Poll fails, the error is returned and op is unmodified. If Poll succeeds and
// the operation has completed with failure, the error is returned and op.Done will return true.
// If Poll succeeds and the operation has completed successfully,
// op.Done will return true, and the response of the operation is returned.
// If Poll succeeds and the operation has not completed, the returned response and error are both nil.
func (op *CreateInputOperation) Poll(ctx context.Context, opts ...gax.CallOption) (*livestreampb.Input, error) {
	var resp livestreampb.Input
	if err := op.lro.Poll(ctx, &resp, opts...); err != nil {
		return nil, err
	}
	if !op.Done() {
		return nil, nil
	}
	return &resp, nil
}

// Metadata returns metadata associated with the long-running operation.
// Metadata itself does not contact the server, but Poll does.
// To get the latest metadata, call this method after a successful call to Poll.
// If the metadata is not available, the returned metadata and error are both nil.
func (op *CreateInputOperation) Metadata() (*livestreampb.OperationMetadata, error) {
	var meta livestreampb.OperationMetadata
	if err := op.lro.Metadata(&meta); err == longrunning.ErrNoMetadata {
		return nil, nil
	} else if err != nil {
		return nil, err
	}
	return &meta, nil
}

// Done reports whether the long-running operation has completed.
func (op *CreateInputOperation) Done() bool {
	return op.lro.Done()
}

// Name returns the name of the long-running operation.
// The name is assigned by the server and is unique within the service from which the operation is created.
func (op *CreateInputOperation) Name() string {
	return op.lro.Name()
}

// DeleteChannelOperation manages a long-running operation from DeleteChannel.
type DeleteChannelOperation struct {
	lro *longrunning.Operation
}

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

// Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
//
// See documentation of Poll for error-handling information.
func (op *DeleteChannelOperation) Wait(ctx context.Context, opts ...gax.CallOption) error {
	return op.lro.WaitWithInterval(ctx, nil, time.Minute, opts...)
}

// Poll fetches the latest state of the long-running operation.
//
// Poll also fetches the latest metadata, which can be retrieved by Metadata.
//
// If Poll fails, the error is returned and op is unmodified. If Poll succeeds and
// the operation has completed with failure, the error is returned and op.Done will return true.
// If Poll succeeds and the operation has completed successfully,
// op.Done will return true, and the response of the operation is returned.
// If Poll succeeds and the operation has not completed, the returned response and error are both nil.
func (op *DeleteChannelOperation) Poll(ctx context.Context, opts ...gax.CallOption) error {
	return op.lro.Poll(ctx, nil, opts...)
}

// Metadata returns metadata associated with the long-running operation.
// Metadata itself does not contact the server, but Poll does.
// To get the latest metadata, call this method after a successful call to Poll.
// If the metadata is not available, the returned metadata and error are both nil.
func (op *DeleteChannelOperation) Metadata() (*livestreampb.OperationMetadata, error) {
	var meta livestreampb.OperationMetadata
	if err := op.lro.Metadata(&meta); err == longrunning.ErrNoMetadata {
		return nil, nil
	} else if err != nil {
		return nil, err
	}
	return &meta, nil
}

// Done reports whether the long-running operation has completed.
func (op *DeleteChannelOperation) Done() bool {
	return op.lro.Done()
}

// Name returns the name of the long-running operation.
// The name is assigned by the server and is unique within the service from which the operation is created.
func (op *DeleteChannelOperation) Name() string {
	return op.lro.Name()
}

// DeleteInputOperation manages a long-running operation from DeleteInput.
type DeleteInputOperation struct {
	lro *longrunning.Operation
}

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

// Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
//
// See documentation of Poll for error-handling information.
func (op *DeleteInputOperation) Wait(ctx context.Context, opts ...gax.CallOption) error {
	return op.lro.WaitWithInterval(ctx, nil, time.Minute, opts...)
}

// Poll fetches the latest state of the long-running operation.
//
// Poll also fetches the latest metadata, which can be retrieved by Metadata.
//
// If Poll fails, the error is returned and op is unmodified. If Poll succeeds and
// the operation has completed with failure, the error is returned and op.Done will return true.
// If Poll succeeds and the operation has completed successfully,
// op.Done will return true, and the response of the operation is returned.
// If Poll succeeds and the operation has not completed, the returned response and error are both nil.
func (op *DeleteInputOperation) Poll(ctx context.Context, opts ...gax.CallOption) error {
	return op.lro.Poll(ctx, nil, opts...)
}

// Metadata returns metadata associated with the long-running operation.
// Metadata itself does not contact the server, but Poll does.
// To get the latest metadata, call this method after a successful call to Poll.
// If the metadata is not available, the returned metadata and error are both nil.
func (op *DeleteInputOperation) Metadata() (*livestreampb.OperationMetadata, error) {
	var meta livestreampb.OperationMetadata
	if err := op.lro.Metadata(&meta); err == longrunning.ErrNoMetadata {
		return nil, nil
	} else if err != nil {
		return nil, err
	}
	return &meta, nil
}

// Done reports whether the long-running operation has completed.
func (op *DeleteInputOperation) Done() bool {
	return op.lro.Done()
}

// Name returns the name of the long-running operation.
// The name is assigned by the server and is unique within the service from which the operation is created.
func (op *DeleteInputOperation) Name() string {
	return op.lro.Name()
}

// StartChannelOperation manages a long-running operation from StartChannel.
type StartChannelOperation struct {
	lro *longrunning.Operation
}

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

// Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
//
// See documentation of Poll for error-handling information.
func (op *StartChannelOperation) Wait(ctx context.Context, opts ...gax.CallOption) (*livestreampb.ChannelOperationResponse, error) {
	var resp livestreampb.ChannelOperationResponse
	if err := op.lro.WaitWithInterval(ctx, &resp, time.Minute, opts...); err != nil {
		return nil, err
	}
	return &resp, nil
}

// Poll fetches the latest state of the long-running operation.
//
// Poll also fetches the latest metadata, which can be retrieved by Metadata.
//
// If Poll fails, the error is returned and op is unmodified. If Poll succeeds and
// the operation has completed with failure, the error is returned and op.Done will return true.
// If Poll succeeds and the operation has completed successfully,
// op.Done will return true, and the response of the operation is returned.
// If Poll succeeds and the operation has not completed, the returned response and error are both nil.
func (op *StartChannelOperation) Poll(ctx context.Context, opts ...gax.CallOption) (*livestreampb.ChannelOperationResponse, error) {
	var resp livestreampb.ChannelOperationResponse
	if err := op.lro.Poll(ctx, &resp, opts...); err != nil {
		return nil, err
	}
	if !op.Done() {
		return nil, nil
	}
	return &resp, nil
}

// Metadata returns metadata associated with the long-running operation.
// Metadata itself does not contact the server, but Poll does.
// To get the latest metadata, call this method after a successful call to Poll.
// If the metadata is not available, the returned metadata and error are both nil.
func (op *StartChannelOperation) Metadata() (*livestreampb.OperationMetadata, error) {
	var meta livestreampb.OperationMetadata
	if err := op.lro.Metadata(&meta); err == longrunning.ErrNoMetadata {
		return nil, nil
	} else if err != nil {
		return nil, err
	}
	return &meta, nil
}

// Done reports whether the long-running operation has completed.
func (op *StartChannelOperation) Done() bool {
	return op.lro.Done()
}

// Name returns the name of the long-running operation.
// The name is assigned by the server and is unique within the service from which the operation is created.
func (op *StartChannelOperation) Name() string {
	return op.lro.Name()
}

// StopChannelOperation manages a long-running operation from StopChannel.
type StopChannelOperation struct {
	lro *longrunning.Operation
}

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

// Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
//
// See documentation of Poll for error-handling information.
func (op *StopChannelOperation) Wait(ctx context.Context, opts ...gax.CallOption) (*livestreampb.ChannelOperationResponse, error) {
	var resp livestreampb.ChannelOperationResponse
	if err := op.lro.WaitWithInterval(ctx, &resp, time.Minute, opts...); err != nil {
		return nil, err
	}
	return &resp, nil
}

// Poll fetches the latest state of the long-running operation.
//
// Poll also fetches the latest metadata, which can be retrieved by Metadata.
//
// If Poll fails, the error is returned and op is unmodified. If Poll succeeds and
// the operation has completed with failure, the error is returned and op.Done will return true.
// If Poll succeeds and the operation has completed successfully,
// op.Done will return true, and the response of the operation is returned.
// If Poll succeeds and the operation has not completed, the returned response and error are both nil.
func (op *StopChannelOperation) Poll(ctx context.Context, opts ...gax.CallOption) (*livestreampb.ChannelOperationResponse, error) {
	var resp livestreampb.ChannelOperationResponse
	if err := op.lro.Poll(ctx, &resp, opts...); err != nil {
		return nil, err
	}
	if !op.Done() {
		return nil, nil
	}
	return &resp, nil
}

// Metadata returns metadata associated with the long-running operation.
// Metadata itself does not contact the server, but Poll does.
// To get the latest metadata, call this method after a successful call to Poll.
// If the metadata is not available, the returned metadata and error are both nil.
func (op *StopChannelOperation) Metadata() (*livestreampb.OperationMetadata, error) {
	var meta livestreampb.OperationMetadata
	if err := op.lro.Metadata(&meta); err == longrunning.ErrNoMetadata {
		return nil, nil
	} else if err != nil {
		return nil, err
	}
	return &meta, nil
}

// Done reports whether the long-running operation has completed.
func (op *StopChannelOperation) Done() bool {
	return op.lro.Done()
}

// Name returns the name of the long-running operation.
// The name is assigned by the server and is unique within the service from which the operation is created.
func (op *StopChannelOperation) Name() string {
	return op.lro.Name()
}

// UpdateChannelOperation manages a long-running operation from UpdateChannel.
type UpdateChannelOperation struct {
	lro *longrunning.Operation
}

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

// Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
//
// See documentation of Poll for error-handling information.
func (op *UpdateChannelOperation) Wait(ctx context.Context, opts ...gax.CallOption) (*livestreampb.Channel, error) {
	var resp livestreampb.Channel
	if err := op.lro.WaitWithInterval(ctx, &resp, time.Minute, opts...); err != nil {
		return nil, err
	}
	return &resp, nil
}

// Poll fetches the latest state of the long-running operation.
//
// Poll also fetches the latest metadata, which can be retrieved by Metadata.
//
// If Poll fails, the error is returned and op is unmodified. If Poll succeeds and
// the operation has completed with failure, the error is returned and op.Done will return true.
// If Poll succeeds and the operation has completed successfully,
// op.Done will return true, and the response of the operation is returned.
// If Poll succeeds and the operation has not completed, the returned response and error are both nil.
func (op *UpdateChannelOperation) Poll(ctx context.Context, opts ...gax.CallOption) (*livestreampb.Channel, error) {
	var resp livestreampb.Channel
	if err := op.lro.Poll(ctx, &resp, opts...); err != nil {
		return nil, err
	}
	if !op.Done() {
		return nil, nil
	}
	return &resp, nil
}

// Metadata returns metadata associated with the long-running operation.
// Metadata itself does not contact the server, but Poll does.
// To get the latest metadata, call this method after a successful call to Poll.
// If the metadata is not available, the returned metadata and error are both nil.
func (op *UpdateChannelOperation) Metadata() (*livestreampb.OperationMetadata, error) {
	var meta livestreampb.OperationMetadata
	if err := op.lro.Metadata(&meta); err == longrunning.ErrNoMetadata {
		return nil, nil
	} else if err != nil {
		return nil, err
	}
	return &meta, nil
}

// Done reports whether the long-running operation has completed.
func (op *UpdateChannelOperation) Done() bool {
	return op.lro.Done()
}

// Name returns the name of the long-running operation.
// The name is assigned by the server and is unique within the service from which the operation is created.
func (op *UpdateChannelOperation) Name() string {
	return op.lro.Name()
}

// UpdateInputOperation manages a long-running operation from UpdateInput.
type UpdateInputOperation struct {
	lro *longrunning.Operation
}

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

// Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
//
// See documentation of Poll for error-handling information.
func (op *UpdateInputOperation) Wait(ctx context.Context, opts ...gax.CallOption) (*livestreampb.Input, error) {
	var resp livestreampb.Input
	if err := op.lro.WaitWithInterval(ctx, &resp, time.Minute, opts...); err != nil {
		return nil, err
	}
	return &resp, nil
}

// Poll fetches the latest state of the long-running operation.
//
// Poll also fetches the latest metadata, which can be retrieved by Metadata.
//
// If Poll fails, the error is returned and op is unmodified. If Poll succeeds and
// the operation has completed with failure, the error is returned and op.Done will return true.
// If Poll succeeds and the operation has completed successfully,
// op.Done will return true, and the response of the operation is returned.
// If Poll succeeds and the operation has not completed, the returned response and error are both nil.
func (op *UpdateInputOperation) Poll(ctx context.Context, opts ...gax.CallOption) (*livestreampb.Input, error) {
	var resp livestreampb.Input
	if err := op.lro.Poll(ctx, &resp, opts...); err != nil {
		return nil, err
	}
	if !op.Done() {
		return nil, nil
	}
	return &resp, nil
}

// Metadata returns metadata associated with the long-running operation.
// Metadata itself does not contact the server, but Poll does.
// To get the latest metadata, call this method after a successful call to Poll.
// If the metadata is not available, the returned metadata and error are both nil.
func (op *UpdateInputOperation) Metadata() (*livestreampb.OperationMetadata, error) {
	var meta livestreampb.OperationMetadata
	if err := op.lro.Metadata(&meta); err == longrunning.ErrNoMetadata {
		return nil, nil
	} else if err != nil {
		return nil, err
	}
	return &meta, nil
}

// Done reports whether the long-running operation has completed.
func (op *UpdateInputOperation) Done() bool {
	return op.lro.Done()
}

// Name returns the name of the long-running operation.
// The name is assigned by the server and is unique within the service from which the operation is created.
func (op *UpdateInputOperation) Name() string {
	return op.lro.Name()
}

// ChannelIterator manages a stream of *livestreampb.Channel.
type ChannelIterator struct {
	items    []*livestreampb.Channel
	pageInfo *iterator.PageInfo
	nextFunc func() error

	// Response is the raw response for the current page.
	// It must be cast to the RPC response type.
	// Calling Next() or InternalFetch() updates this value.
	Response interface{}

	// InternalFetch is for use by the Google Cloud Libraries only.
	// It is not part of the stable interface of this package.
	//
	// InternalFetch returns results from a single call to the underlying RPC.
	// The number of results is no greater than pageSize.
	// If there are no more results, nextPageToken is empty and err is nil.
	InternalFetch func(pageSize int, pageToken string) (results []*livestreampb.Channel, nextPageToken string, err error)
}

// PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
func (it *ChannelIterator) PageInfo() *iterator.PageInfo {
	return it.pageInfo
}

// Next returns the next result. Its second return value is iterator.Done if there are no more
// results. Once Next returns Done, all subsequent calls will return Done.
func (it *ChannelIterator) Next() (*livestreampb.Channel, error) {
	var item *livestreampb.Channel
	if err := it.nextFunc(); err != nil {
		return item, err
	}
	item = it.items[0]
	it.items = it.items[1:]
	return item, nil
}

func (it *ChannelIterator) bufLen() int {
	return len(it.items)
}

func (it *ChannelIterator) takeBuf() interface{} {
	b := it.items
	it.items = nil
	return b
}

// EventIterator manages a stream of *livestreampb.Event.
type EventIterator struct {
	items    []*livestreampb.Event
	pageInfo *iterator.PageInfo
	nextFunc func() error

	// Response is the raw response for the current page.
	// It must be cast to the RPC response type.
	// Calling Next() or InternalFetch() updates this value.
	Response interface{}

	// InternalFetch is for use by the Google Cloud Libraries only.
	// It is not part of the stable interface of this package.
	//
	// InternalFetch returns results from a single call to the underlying RPC.
	// The number of results is no greater than pageSize.
	// If there are no more results, nextPageToken is empty and err is nil.
	InternalFetch func(pageSize int, pageToken string) (results []*livestreampb.Event, nextPageToken string, err error)
}

// PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
func (it *EventIterator) PageInfo() *iterator.PageInfo {
	return it.pageInfo
}

// Next returns the next result. Its second return value is iterator.Done if there are no more
// results. Once Next returns Done, all subsequent calls will return Done.
func (it *EventIterator) Next() (*livestreampb.Event, error) {
	var item *livestreampb.Event
	if err := it.nextFunc(); err != nil {
		return item, err
	}
	item = it.items[0]
	it.items = it.items[1:]
	return item, nil
}

func (it *EventIterator) bufLen() int {
	return len(it.items)
}

func (it *EventIterator) takeBuf() interface{} {
	b := it.items
	it.items = nil
	return b
}

// InputIterator manages a stream of *livestreampb.Input.
type InputIterator struct {
	items    []*livestreampb.Input
	pageInfo *iterator.PageInfo
	nextFunc func() error

	// Response is the raw response for the current page.
	// It must be cast to the RPC response type.
	// Calling Next() or InternalFetch() updates this value.
	Response interface{}

	// InternalFetch is for use by the Google Cloud Libraries only.
	// It is not part of the stable interface of this package.
	//
	// InternalFetch returns results from a single call to the underlying RPC.
	// The number of results is no greater than pageSize.
	// If there are no more results, nextPageToken is empty and err is nil.
	InternalFetch func(pageSize int, pageToken string) (results []*livestreampb.Input, nextPageToken string, err error)
}

// PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
func (it *InputIterator) PageInfo() *iterator.PageInfo {
	return it.pageInfo
}

// Next returns the next result. Its second return value is iterator.Done if there are no more
// results. Once Next returns Done, all subsequent calls will return Done.
func (it *InputIterator) Next() (*livestreampb.Input, error) {
	var item *livestreampb.Input
	if err := it.nextFunc(); err != nil {
		return item, err
	}
	item = it.items[0]
	it.items = it.items[1:]
	return item, nil
}

func (it *InputIterator) bufLen() int {
	return len(it.items)
}

func (it *InputIterator) takeBuf() interface{} {
	b := it.items
	it.items = nil
	return b
}