// Code generated by smithy-go-codegen DO NOT EDIT.

package paymentcryptography

import (
	"context"
	"fmt"
	awsmiddleware "github.com/aws/aws-sdk-go-v2/aws/middleware"
	"github.com/aws/aws-sdk-go-v2/aws/signer/v4"
	"github.com/aws/aws-sdk-go-v2/service/paymentcryptography/types"
	"github.com/aws/smithy-go/middleware"
	smithyhttp "github.com/aws/smithy-go/transport/http"
)

// Lists the keys in the caller's Amazon Web Services account and Amazon Web
// Services Region. You can filter the list of keys. This is a paginated operation,
// which means that each response might contain only a subset of all the keys. When
// the response contains only a subset of keys, it includes a NextToken value. Use
// this value in a subsequent ListKeys request to get more keys. When you receive
// a response with no NextToken (or an empty or null value), that means there are
// no more keys to get. Cross-account use: This operation can't be used across
// different Amazon Web Services accounts. Related operations:
//   - CreateKey
//   - DeleteKey
//   - GetKey
func (c *Client) ListKeys(ctx context.Context, params *ListKeysInput, optFns ...func(*Options)) (*ListKeysOutput, error) {
	if params == nil {
		params = &ListKeysInput{}
	}

	result, metadata, err := c.invokeOperation(ctx, "ListKeys", params, optFns, c.addOperationListKeysMiddlewares)
	if err != nil {
		return nil, err
	}

	out := result.(*ListKeysOutput)
	out.ResultMetadata = metadata
	return out, nil
}

type ListKeysInput struct {

	// The key state of the keys you want to list.
	KeyState types.KeyState

	// Use this parameter to specify the maximum number of items to return. When this
	// value is present, Amazon Web Services Payment Cryptography does not return more
	// than the specified number of items, but it might return fewer.
	MaxResults *int32

	// Use this parameter in a subsequent request after you receive a response with
	// truncated results. Set it to the value of NextToken from the truncated response
	// you just received.
	NextToken *string

	noSmithyDocumentSerde
}

type ListKeysOutput struct {

	// The list of keys created within the caller's Amazon Web Services account and
	// Amazon Web Services Region.
	//
	// This member is required.
	Keys []types.KeySummary

	// The token for the next set of results, or an empty or null value if there are
	// no more results.
	NextToken *string

	// Metadata pertaining to the operation's result.
	ResultMetadata middleware.Metadata

	noSmithyDocumentSerde
}

func (c *Client) addOperationListKeysMiddlewares(stack *middleware.Stack, options Options) (err error) {
	err = stack.Serialize.Add(&awsAwsjson10_serializeOpListKeys{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsAwsjson10_deserializeOpListKeys{}, middleware.After)
	if err != nil {
		return err
	}
	if err = addSetLoggerMiddleware(stack, options); err != nil {
		return err
	}
	if err = awsmiddleware.AddClientRequestIDMiddleware(stack); err != nil {
		return err
	}
	if err = smithyhttp.AddComputeContentLengthMiddleware(stack); err != nil {
		return err
	}
	if err = addResolveEndpointMiddleware(stack, options); err != nil {
		return err
	}
	if err = v4.AddComputePayloadSHA256Middleware(stack); err != nil {
		return err
	}
	if err = addRetryMiddlewares(stack, options); err != nil {
		return err
	}
	if err = addHTTPSignerV4Middleware(stack, options); err != nil {
		return err
	}
	if err = awsmiddleware.AddRawResponseToMetadata(stack); err != nil {
		return err
	}
	if err = awsmiddleware.AddRecordResponseTiming(stack); err != nil {
		return err
	}
	if err = addClientUserAgent(stack, options); err != nil {
		return err
	}
	if err = smithyhttp.AddErrorCloseResponseBodyMiddleware(stack); err != nil {
		return err
	}
	if err = smithyhttp.AddCloseResponseBodyMiddleware(stack); err != nil {
		return err
	}
	if err = stack.Initialize.Add(newServiceMetadataMiddleware_opListKeys(options.Region), middleware.Before); err != nil {
		return err
	}
	if err = awsmiddleware.AddRecursionDetection(stack); err != nil {
		return err
	}
	if err = addRequestIDRetrieverMiddleware(stack); err != nil {
		return err
	}
	if err = addResponseErrorMiddleware(stack); err != nil {
		return err
	}
	if err = addRequestResponseLogging(stack, options); err != nil {
		return err
	}
	return nil
}

// ListKeysAPIClient is a client that implements the ListKeys operation.
type ListKeysAPIClient interface {
	ListKeys(context.Context, *ListKeysInput, ...func(*Options)) (*ListKeysOutput, error)
}

var _ ListKeysAPIClient = (*Client)(nil)

// ListKeysPaginatorOptions is the paginator options for ListKeys
type ListKeysPaginatorOptions struct {
	// Use this parameter to specify the maximum number of items to return. When this
	// value is present, Amazon Web Services Payment Cryptography does not return more
	// than the specified number of items, but it might return fewer.
	Limit int32

	// Set to true if pagination should stop if the service returns a pagination token
	// that matches the most recent token provided to the service.
	StopOnDuplicateToken bool
}

// ListKeysPaginator is a paginator for ListKeys
type ListKeysPaginator struct {
	options   ListKeysPaginatorOptions
	client    ListKeysAPIClient
	params    *ListKeysInput
	nextToken *string
	firstPage bool
}

// NewListKeysPaginator returns a new ListKeysPaginator
func NewListKeysPaginator(client ListKeysAPIClient, params *ListKeysInput, optFns ...func(*ListKeysPaginatorOptions)) *ListKeysPaginator {
	if params == nil {
		params = &ListKeysInput{}
	}

	options := ListKeysPaginatorOptions{}
	if params.MaxResults != nil {
		options.Limit = *params.MaxResults
	}

	for _, fn := range optFns {
		fn(&options)
	}

	return &ListKeysPaginator{
		options:   options,
		client:    client,
		params:    params,
		firstPage: true,
		nextToken: params.NextToken,
	}
}

// HasMorePages returns a boolean indicating whether more pages are available
func (p *ListKeysPaginator) HasMorePages() bool {
	return p.firstPage || (p.nextToken != nil && len(*p.nextToken) != 0)
}

// NextPage retrieves the next ListKeys page.
func (p *ListKeysPaginator) NextPage(ctx context.Context, optFns ...func(*Options)) (*ListKeysOutput, error) {
	if !p.HasMorePages() {
		return nil, fmt.Errorf("no more pages available")
	}

	params := *p.params
	params.NextToken = p.nextToken

	var limit *int32
	if p.options.Limit > 0 {
		limit = &p.options.Limit
	}
	params.MaxResults = limit

	result, err := p.client.ListKeys(ctx, &params, optFns...)
	if err != nil {
		return nil, err
	}
	p.firstPage = false

	prevToken := p.nextToken
	p.nextToken = result.NextToken

	if p.options.StopOnDuplicateToken &&
		prevToken != nil &&
		p.nextToken != nil &&
		*prevToken == *p.nextToken {
		p.nextToken = nil
	}

	return result, nil
}

func newServiceMetadataMiddleware_opListKeys(region string) *awsmiddleware.RegisterServiceMetadata {
	return &awsmiddleware.RegisterServiceMetadata{
		Region:        region,
		ServiceID:     ServiceID,
		SigningName:   "payment-cryptography",
		OperationName: "ListKeys",
	}
}