// 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 resourcemanager

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"
	resourcemanagerpb "google.golang.org/genproto/googleapis/cloud/resourcemanager/v3"
	iampb "google.golang.org/genproto/googleapis/iam/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 newTagKeysClientHook clientHook

// TagKeysCallOptions contains the retry settings for each method of TagKeysClient.
type TagKeysCallOptions struct {
	ListTagKeys        []gax.CallOption
	GetTagKey          []gax.CallOption
	CreateTagKey       []gax.CallOption
	UpdateTagKey       []gax.CallOption
	DeleteTagKey       []gax.CallOption
	GetIamPolicy       []gax.CallOption
	SetIamPolicy       []gax.CallOption
	TestIamPermissions []gax.CallOption
}

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

func defaultTagKeysCallOptions() *TagKeysCallOptions {
	return &TagKeysCallOptions{
		ListTagKeys: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		GetTagKey: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		CreateTagKey: []gax.CallOption{},
		UpdateTagKey: []gax.CallOption{},
		DeleteTagKey: []gax.CallOption{},
		GetIamPolicy: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		SetIamPolicy:       []gax.CallOption{},
		TestIamPermissions: []gax.CallOption{},
	}
}

// internalTagKeysClient is an interface that defines the methods availaible from Cloud Resource Manager API.
type internalTagKeysClient interface {
	Close() error
	setGoogleClientInfo(...string)
	Connection() *grpc.ClientConn
	ListTagKeys(context.Context, *resourcemanagerpb.ListTagKeysRequest, ...gax.CallOption) *TagKeyIterator
	GetTagKey(context.Context, *resourcemanagerpb.GetTagKeyRequest, ...gax.CallOption) (*resourcemanagerpb.TagKey, error)
	CreateTagKey(context.Context, *resourcemanagerpb.CreateTagKeyRequest, ...gax.CallOption) (*CreateTagKeyOperation, error)
	CreateTagKeyOperation(name string) *CreateTagKeyOperation
	UpdateTagKey(context.Context, *resourcemanagerpb.UpdateTagKeyRequest, ...gax.CallOption) (*UpdateTagKeyOperation, error)
	UpdateTagKeyOperation(name string) *UpdateTagKeyOperation
	DeleteTagKey(context.Context, *resourcemanagerpb.DeleteTagKeyRequest, ...gax.CallOption) (*DeleteTagKeyOperation, error)
	DeleteTagKeyOperation(name string) *DeleteTagKeyOperation
	GetIamPolicy(context.Context, *iampb.GetIamPolicyRequest, ...gax.CallOption) (*iampb.Policy, error)
	SetIamPolicy(context.Context, *iampb.SetIamPolicyRequest, ...gax.CallOption) (*iampb.Policy, error)
	TestIamPermissions(context.Context, *iampb.TestIamPermissionsRequest, ...gax.CallOption) (*iampb.TestIamPermissionsResponse, error)
}

// TagKeysClient is a client for interacting with Cloud Resource Manager API.
// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
//
// Allow users to create and manage tag keys.
type TagKeysClient struct {
	// The internal transport-dependent client.
	internalClient internalTagKeysClient

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

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

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

// ListTagKeys lists all TagKeys for a parent resource.
func (c *TagKeysClient) ListTagKeys(ctx context.Context, req *resourcemanagerpb.ListTagKeysRequest, opts ...gax.CallOption) *TagKeyIterator {
	return c.internalClient.ListTagKeys(ctx, req, opts...)
}

// GetTagKey retrieves a TagKey. This method will return PERMISSION_DENIED if the
// key does not exist or the user does not have permission to view it.
func (c *TagKeysClient) GetTagKey(ctx context.Context, req *resourcemanagerpb.GetTagKeyRequest, opts ...gax.CallOption) (*resourcemanagerpb.TagKey, error) {
	return c.internalClient.GetTagKey(ctx, req, opts...)
}

// CreateTagKey creates a new TagKey. If another request with the same parameters is
// sent while the original request is in process, the second request
// will receive an error. A maximum of 300 TagKeys can exist under a parent at
// any given time.
func (c *TagKeysClient) CreateTagKey(ctx context.Context, req *resourcemanagerpb.CreateTagKeyRequest, opts ...gax.CallOption) (*CreateTagKeyOperation, error) {
	return c.internalClient.CreateTagKey(ctx, req, opts...)
}

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

// UpdateTagKey updates the attributes of the TagKey resource.
func (c *TagKeysClient) UpdateTagKey(ctx context.Context, req *resourcemanagerpb.UpdateTagKeyRequest, opts ...gax.CallOption) (*UpdateTagKeyOperation, error) {
	return c.internalClient.UpdateTagKey(ctx, req, opts...)
}

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

// DeleteTagKey deletes a TagKey. The TagKey cannot be deleted if it has any child
// TagValues.
func (c *TagKeysClient) DeleteTagKey(ctx context.Context, req *resourcemanagerpb.DeleteTagKeyRequest, opts ...gax.CallOption) (*DeleteTagKeyOperation, error) {
	return c.internalClient.DeleteTagKey(ctx, req, opts...)
}

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

// GetIamPolicy gets the access control policy for a TagKey. The returned policy may be
// empty if no such policy or resource exists. The resource field should
// be the TagKey’s resource name. For example, “tagKeys/1234”.
// The caller must have
// cloudresourcemanager.googleapis.com/tagKeys.getIamPolicy permission on
// the specified TagKey.
func (c *TagKeysClient) GetIamPolicy(ctx context.Context, req *iampb.GetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error) {
	return c.internalClient.GetIamPolicy(ctx, req, opts...)
}

// SetIamPolicy sets the access control policy on a TagKey, replacing any existing
// policy. The resource field should be the TagKey’s resource name.
// For example, “tagKeys/1234”.
// The caller must have resourcemanager.tagKeys.setIamPolicy permission
// on the identified tagValue.
func (c *TagKeysClient) SetIamPolicy(ctx context.Context, req *iampb.SetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error) {
	return c.internalClient.SetIamPolicy(ctx, req, opts...)
}

// TestIamPermissions returns permissions that a caller has on the specified TagKey.
// The resource field should be the TagKey’s resource name.
// For example, “tagKeys/1234”.
//
// There are no permissions required for making this API call.
func (c *TagKeysClient) TestIamPermissions(ctx context.Context, req *iampb.TestIamPermissionsRequest, opts ...gax.CallOption) (*iampb.TestIamPermissionsResponse, error) {
	return c.internalClient.TestIamPermissions(ctx, req, opts...)
}

// tagKeysGRPCClient is a client for interacting with Cloud Resource Manager API over gRPC transport.
//
// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
type tagKeysGRPCClient 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 TagKeysClient
	CallOptions **TagKeysCallOptions

	// The gRPC API client.
	tagKeysClient resourcemanagerpb.TagKeysClient

	// 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
}

// NewTagKeysClient creates a new tag keys client based on gRPC.
// The returned client must be Closed when it is done being used to clean up its underlying connections.
//
// Allow users to create and manage tag keys.
func NewTagKeysClient(ctx context.Context, opts ...option.ClientOption) (*TagKeysClient, error) {
	clientOpts := defaultTagKeysGRPCClientOptions()
	if newTagKeysClientHook != nil {
		hookOpts, err := newTagKeysClientHook(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 := TagKeysClient{CallOptions: defaultTagKeysCallOptions()}

	c := &tagKeysGRPCClient{
		connPool:         connPool,
		disableDeadlines: disableDeadlines,
		tagKeysClient:    resourcemanagerpb.NewTagKeysClient(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 *tagKeysGRPCClient) 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 *tagKeysGRPCClient) 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 *tagKeysGRPCClient) Close() error {
	return c.connPool.Close()
}

func (c *tagKeysGRPCClient) ListTagKeys(ctx context.Context, req *resourcemanagerpb.ListTagKeysRequest, opts ...gax.CallOption) *TagKeyIterator {
	ctx = insertMetadata(ctx, c.xGoogMetadata)
	opts = append((*c.CallOptions).ListTagKeys[0:len((*c.CallOptions).ListTagKeys):len((*c.CallOptions).ListTagKeys)], opts...)
	it := &TagKeyIterator{}
	req = proto.Clone(req).(*resourcemanagerpb.ListTagKeysRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*resourcemanagerpb.TagKey, string, error) {
		resp := &resourcemanagerpb.ListTagKeysResponse{}
		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.tagKeysClient.ListTagKeys(ctx, req, settings.GRPC...)
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

		it.Response = resp
		return resp.GetTagKeys(), 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 *tagKeysGRPCClient) GetTagKey(ctx context.Context, req *resourcemanagerpb.GetTagKeyRequest, opts ...gax.CallOption) (*resourcemanagerpb.TagKey, 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).GetTagKey[0:len((*c.CallOptions).GetTagKey):len((*c.CallOptions).GetTagKey)], opts...)
	var resp *resourcemanagerpb.TagKey
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.tagKeysClient.GetTagKey(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *tagKeysGRPCClient) CreateTagKey(ctx context.Context, req *resourcemanagerpb.CreateTagKeyRequest, opts ...gax.CallOption) (*CreateTagKeyOperation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 60000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	ctx = insertMetadata(ctx, c.xGoogMetadata)
	opts = append((*c.CallOptions).CreateTagKey[0:len((*c.CallOptions).CreateTagKey):len((*c.CallOptions).CreateTagKey)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.tagKeysClient.CreateTagKey(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &CreateTagKeyOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *tagKeysGRPCClient) UpdateTagKey(ctx context.Context, req *resourcemanagerpb.UpdateTagKeyRequest, opts ...gax.CallOption) (*UpdateTagKeyOperation, 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", "tag_key.name", url.QueryEscape(req.GetTagKey().GetName())))
	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).UpdateTagKey[0:len((*c.CallOptions).UpdateTagKey):len((*c.CallOptions).UpdateTagKey)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.tagKeysClient.UpdateTagKey(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &UpdateTagKeyOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *tagKeysGRPCClient) DeleteTagKey(ctx context.Context, req *resourcemanagerpb.DeleteTagKeyRequest, opts ...gax.CallOption) (*DeleteTagKeyOperation, 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).DeleteTagKey[0:len((*c.CallOptions).DeleteTagKey):len((*c.CallOptions).DeleteTagKey)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.tagKeysClient.DeleteTagKey(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &DeleteTagKeyOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *tagKeysGRPCClient) GetIamPolicy(ctx context.Context, req *iampb.GetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, 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", "resource", url.QueryEscape(req.GetResource())))
	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
	var resp *iampb.Policy
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.tagKeysClient.GetIamPolicy(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *tagKeysGRPCClient) SetIamPolicy(ctx context.Context, req *iampb.SetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, 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", "resource", url.QueryEscape(req.GetResource())))
	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
	var resp *iampb.Policy
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.tagKeysClient.SetIamPolicy(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *tagKeysGRPCClient) TestIamPermissions(ctx context.Context, req *iampb.TestIamPermissionsRequest, opts ...gax.CallOption) (*iampb.TestIamPermissionsResponse, error) {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
	var resp *iampb.TestIamPermissionsResponse
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.tagKeysClient.TestIamPermissions(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

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

// CreateTagKeyOperation returns a new CreateTagKeyOperation from a given name.
// The name must be that of a previously created CreateTagKeyOperation, possibly from a different process.
func (c *tagKeysGRPCClient) CreateTagKeyOperation(name string) *CreateTagKeyOperation {
	return &CreateTagKeyOperation{
		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 *CreateTagKeyOperation) Wait(ctx context.Context, opts ...gax.CallOption) (*resourcemanagerpb.TagKey, error) {
	var resp resourcemanagerpb.TagKey
	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 *CreateTagKeyOperation) Poll(ctx context.Context, opts ...gax.CallOption) (*resourcemanagerpb.TagKey, error) {
	var resp resourcemanagerpb.TagKey
	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 *CreateTagKeyOperation) Metadata() (*resourcemanagerpb.CreateTagKeyMetadata, error) {
	var meta resourcemanagerpb.CreateTagKeyMetadata
	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 *CreateTagKeyOperation) 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 *CreateTagKeyOperation) Name() string {
	return op.lro.Name()
}

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

// DeleteTagKeyOperation returns a new DeleteTagKeyOperation from a given name.
// The name must be that of a previously created DeleteTagKeyOperation, possibly from a different process.
func (c *tagKeysGRPCClient) DeleteTagKeyOperation(name string) *DeleteTagKeyOperation {
	return &DeleteTagKeyOperation{
		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 *DeleteTagKeyOperation) Wait(ctx context.Context, opts ...gax.CallOption) (*resourcemanagerpb.TagKey, error) {
	var resp resourcemanagerpb.TagKey
	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 *DeleteTagKeyOperation) Poll(ctx context.Context, opts ...gax.CallOption) (*resourcemanagerpb.TagKey, error) {
	var resp resourcemanagerpb.TagKey
	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 *DeleteTagKeyOperation) Metadata() (*resourcemanagerpb.DeleteTagKeyMetadata, error) {
	var meta resourcemanagerpb.DeleteTagKeyMetadata
	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 *DeleteTagKeyOperation) 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 *DeleteTagKeyOperation) Name() string {
	return op.lro.Name()
}

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

// UpdateTagKeyOperation returns a new UpdateTagKeyOperation from a given name.
// The name must be that of a previously created UpdateTagKeyOperation, possibly from a different process.
func (c *tagKeysGRPCClient) UpdateTagKeyOperation(name string) *UpdateTagKeyOperation {
	return &UpdateTagKeyOperation{
		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 *UpdateTagKeyOperation) Wait(ctx context.Context, opts ...gax.CallOption) (*resourcemanagerpb.TagKey, error) {
	var resp resourcemanagerpb.TagKey
	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 *UpdateTagKeyOperation) Poll(ctx context.Context, opts ...gax.CallOption) (*resourcemanagerpb.TagKey, error) {
	var resp resourcemanagerpb.TagKey
	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 *UpdateTagKeyOperation) Metadata() (*resourcemanagerpb.UpdateTagKeyMetadata, error) {
	var meta resourcemanagerpb.UpdateTagKeyMetadata
	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 *UpdateTagKeyOperation) 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 *UpdateTagKeyOperation) Name() string {
	return op.lro.Name()
}

// TagKeyIterator manages a stream of *resourcemanagerpb.TagKey.
type TagKeyIterator struct {
	items    []*resourcemanagerpb.TagKey
	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 []*resourcemanagerpb.TagKey, nextPageToken string, err error)
}

// PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
func (it *TagKeyIterator) 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 *TagKeyIterator) Next() (*resourcemanagerpb.TagKey, error) {
	var item *resourcemanagerpb.TagKey
	if err := it.nextFunc(); err != nil {
		return item, err
	}
	item = it.items[0]
	it.items = it.items[1:]
	return item, nil
}

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

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