// 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 kms

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

	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"
	kmspb "google.golang.org/genproto/googleapis/cloud/kms/v1"
	iampb "google.golang.org/genproto/googleapis/iam/v1"
	"google.golang.org/grpc"
	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/metadata"
	"google.golang.org/protobuf/proto"
)

var newEkmClientHook clientHook

// EkmCallOptions contains the retry settings for each method of EkmClient.
type EkmCallOptions struct {
	ListEkmConnections  []gax.CallOption
	GetEkmConnection    []gax.CallOption
	CreateEkmConnection []gax.CallOption
	UpdateEkmConnection []gax.CallOption
	GetIamPolicy        []gax.CallOption
	SetIamPolicy        []gax.CallOption
	TestIamPermissions  []gax.CallOption
}

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

func defaultEkmCallOptions() *EkmCallOptions {
	return &EkmCallOptions{
		ListEkmConnections: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
					codes.DeadlineExceeded,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		GetEkmConnection: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
					codes.DeadlineExceeded,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		CreateEkmConnection: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
					codes.DeadlineExceeded,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		UpdateEkmConnection: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
					codes.DeadlineExceeded,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		GetIamPolicy:       []gax.CallOption{},
		SetIamPolicy:       []gax.CallOption{},
		TestIamPermissions: []gax.CallOption{},
	}
}

// internalEkmClient is an interface that defines the methods availaible from Cloud Key Management Service (KMS) API.
type internalEkmClient interface {
	Close() error
	setGoogleClientInfo(...string)
	Connection() *grpc.ClientConn
	ListEkmConnections(context.Context, *kmspb.ListEkmConnectionsRequest, ...gax.CallOption) *EkmConnectionIterator
	GetEkmConnection(context.Context, *kmspb.GetEkmConnectionRequest, ...gax.CallOption) (*kmspb.EkmConnection, error)
	CreateEkmConnection(context.Context, *kmspb.CreateEkmConnectionRequest, ...gax.CallOption) (*kmspb.EkmConnection, error)
	UpdateEkmConnection(context.Context, *kmspb.UpdateEkmConnectionRequest, ...gax.CallOption) (*kmspb.EkmConnection, error)
	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)
}

// EkmClient is a client for interacting with Cloud Key Management Service (KMS) API.
// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
//
// Google Cloud Key Management EKM Service
//
// Manages external cryptographic keys and operations using those keys.
// Implements a REST model with the following objects:
//
//   EkmConnection
type EkmClient struct {
	// The internal transport-dependent client.
	internalClient internalEkmClient

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

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

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

// ListEkmConnections lists EkmConnections.
func (c *EkmClient) ListEkmConnections(ctx context.Context, req *kmspb.ListEkmConnectionsRequest, opts ...gax.CallOption) *EkmConnectionIterator {
	return c.internalClient.ListEkmConnections(ctx, req, opts...)
}

// GetEkmConnection returns metadata for a given
// EkmConnection.
func (c *EkmClient) GetEkmConnection(ctx context.Context, req *kmspb.GetEkmConnectionRequest, opts ...gax.CallOption) (*kmspb.EkmConnection, error) {
	return c.internalClient.GetEkmConnection(ctx, req, opts...)
}

// CreateEkmConnection creates a new EkmConnection in a given
// Project and Location.
func (c *EkmClient) CreateEkmConnection(ctx context.Context, req *kmspb.CreateEkmConnectionRequest, opts ...gax.CallOption) (*kmspb.EkmConnection, error) {
	return c.internalClient.CreateEkmConnection(ctx, req, opts...)
}

// UpdateEkmConnection updates an EkmConnection's metadata.
func (c *EkmClient) UpdateEkmConnection(ctx context.Context, req *kmspb.UpdateEkmConnectionRequest, opts ...gax.CallOption) (*kmspb.EkmConnection, error) {
	return c.internalClient.UpdateEkmConnection(ctx, req, opts...)
}

// GetIamPolicy gets the access control policy for a resource. Returns an empty policy
// if the resource exists and does not have a policy set.
func (c *EkmClient) 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 the specified resource. Replaces
// any existing policy.
//
// Can return NOT_FOUND, INVALID_ARGUMENT, and PERMISSION_DENIED
// errors.
func (c *EkmClient) 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 resource. If the
// resource does not exist, this will return an empty set of
// permissions, not a NOT_FOUND error.
//
// Note: This operation is designed to be used for building
// permission-aware UIs and command-line tools, not for authorization
// checking. This operation may “fail open” without warning.
func (c *EkmClient) TestIamPermissions(ctx context.Context, req *iampb.TestIamPermissionsRequest, opts ...gax.CallOption) (*iampb.TestIamPermissionsResponse, error) {
	return c.internalClient.TestIamPermissions(ctx, req, opts...)
}

// ekmGRPCClient is a client for interacting with Cloud Key Management Service (KMS) API over gRPC transport.
//
// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
type ekmGRPCClient 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 EkmClient
	CallOptions **EkmCallOptions

	// The gRPC API client.
	ekmClient kmspb.EkmServiceClient

	iamPolicyClient iampb.IAMPolicyClient

	// The x-goog-* metadata to be sent with each request.
	xGoogMetadata metadata.MD
}

// NewEkmClient creates a new ekm service client based on gRPC.
// The returned client must be Closed when it is done being used to clean up its underlying connections.
//
// Google Cloud Key Management EKM Service
//
// Manages external cryptographic keys and operations using those keys.
// Implements a REST model with the following objects:
//
//   EkmConnection
func NewEkmClient(ctx context.Context, opts ...option.ClientOption) (*EkmClient, error) {
	clientOpts := defaultEkmGRPCClientOptions()
	if newEkmClientHook != nil {
		hookOpts, err := newEkmClientHook(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 := EkmClient{CallOptions: defaultEkmCallOptions()}

	c := &ekmGRPCClient{
		connPool:         connPool,
		disableDeadlines: disableDeadlines,
		ekmClient:        kmspb.NewEkmServiceClient(connPool),
		CallOptions:      &client.CallOptions,
		iamPolicyClient:  iampb.NewIAMPolicyClient(connPool),
	}
	c.setGoogleClientInfo()

	client.internalClient = c

	return &client, nil
}

// Connection returns a connection to the API service.
//
// Deprecated.
func (c *ekmGRPCClient) 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 *ekmGRPCClient) setGoogleClientInfo(keyval ...string) {
	kv := append([]string{"gl-go", versionGo()}, keyval...)
	kv = append(kv, "gapic", getVersionClient(), "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 *ekmGRPCClient) Close() error {
	return c.connPool.Close()
}

func (c *ekmGRPCClient) ListEkmConnections(ctx context.Context, req *kmspb.ListEkmConnectionsRequest, opts ...gax.CallOption) *EkmConnectionIterator {
	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).ListEkmConnections[0:len((*c.CallOptions).ListEkmConnections):len((*c.CallOptions).ListEkmConnections)], opts...)
	it := &EkmConnectionIterator{}
	req = proto.Clone(req).(*kmspb.ListEkmConnectionsRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*kmspb.EkmConnection, string, error) {
		resp := &kmspb.ListEkmConnectionsResponse{}
		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.ekmClient.ListEkmConnections(ctx, req, settings.GRPC...)
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

		it.Response = resp
		return resp.GetEkmConnections(), 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 *ekmGRPCClient) GetEkmConnection(ctx context.Context, req *kmspb.GetEkmConnectionRequest, opts ...gax.CallOption) (*kmspb.EkmConnection, 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).GetEkmConnection[0:len((*c.CallOptions).GetEkmConnection):len((*c.CallOptions).GetEkmConnection)], opts...)
	var resp *kmspb.EkmConnection
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.ekmClient.GetEkmConnection(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *ekmGRPCClient) CreateEkmConnection(ctx context.Context, req *kmspb.CreateEkmConnectionRequest, opts ...gax.CallOption) (*kmspb.EkmConnection, 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).CreateEkmConnection[0:len((*c.CallOptions).CreateEkmConnection):len((*c.CallOptions).CreateEkmConnection)], opts...)
	var resp *kmspb.EkmConnection
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.ekmClient.CreateEkmConnection(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *ekmGRPCClient) UpdateEkmConnection(ctx context.Context, req *kmspb.UpdateEkmConnectionRequest, opts ...gax.CallOption) (*kmspb.EkmConnection, 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", "ekm_connection.name", url.QueryEscape(req.GetEkmConnection().GetName())))

	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).UpdateEkmConnection[0:len((*c.CallOptions).UpdateEkmConnection):len((*c.CallOptions).UpdateEkmConnection)], opts...)
	var resp *kmspb.EkmConnection
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.ekmClient.UpdateEkmConnection(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *ekmGRPCClient) GetIamPolicy(ctx context.Context, req *iampb.GetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error) {
	ctx = insertMetadata(ctx, c.xGoogMetadata)
	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.iamPolicyClient.GetIamPolicy(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *ekmGRPCClient) SetIamPolicy(ctx context.Context, req *iampb.SetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error) {
	ctx = insertMetadata(ctx, c.xGoogMetadata)
	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.iamPolicyClient.SetIamPolicy(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *ekmGRPCClient) TestIamPermissions(ctx context.Context, req *iampb.TestIamPermissionsRequest, opts ...gax.CallOption) (*iampb.TestIamPermissionsResponse, error) {
	ctx = insertMetadata(ctx, c.xGoogMetadata)
	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.iamPolicyClient.TestIamPermissions(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

// EkmConnectionIterator manages a stream of *kmspb.EkmConnection.
type EkmConnectionIterator struct {
	items    []*kmspb.EkmConnection
	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 []*kmspb.EkmConnection, nextPageToken string, err error)
}

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

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

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