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

package route53resolver

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/route53resolver/types"
	"github.com/aws/smithy-go/middleware"
	smithyhttp "github.com/aws/smithy-go/transport/http"
)

// Retrieves the firewall configurations that you have defined. DNS Firewall uses
// the configurations to manage firewall behavior for your VPCs. A single call
// might return only a partial list of the configurations. For information, see
// MaxResults.
func (c *Client) ListFirewallConfigs(ctx context.Context, params *ListFirewallConfigsInput, optFns ...func(*Options)) (*ListFirewallConfigsOutput, error) {
	if params == nil {
		params = &ListFirewallConfigsInput{}
	}

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

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

type ListFirewallConfigsInput struct {

	// The maximum number of objects that you want Resolver to return for this request.
	// If more objects are available, in the response, Resolver provides a NextToken
	// value that you can use in a subsequent call to get the next batch of objects. If
	// you don't specify a value for MaxResults, Resolver returns up to 100 objects.
	MaxResults *int32

	// For the first call to this list request, omit this value. When you request a
	// list of objects, Resolver returns at most the number of objects specified in
	// MaxResults. If more objects are available for retrieval, Resolver returns a
	// NextToken value in the response. To retrieve the next batch of objects, use the
	// token that was returned for the prior request in your next request.
	NextToken *string

	noSmithyDocumentSerde
}

type ListFirewallConfigsOutput struct {

	// The configurations for the firewall behavior provided by DNS Firewall for VPCs
	// from Amazon Virtual Private Cloud (Amazon VPC).
	FirewallConfigs []types.FirewallConfig

	// If objects are still available for retrieval, Resolver returns this token in the
	// response. To retrieve the next batch of objects, provide this token in your next
	// request.
	NextToken *string

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

	noSmithyDocumentSerde
}

func (c *Client) addOperationListFirewallConfigsMiddlewares(stack *middleware.Stack, options Options) (err error) {
	err = stack.Serialize.Add(&awsAwsjson11_serializeOpListFirewallConfigs{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsAwsjson11_deserializeOpListFirewallConfigs{}, 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); 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_opListFirewallConfigs(options.Region), middleware.Before); 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
}

// ListFirewallConfigsAPIClient is a client that implements the ListFirewallConfigs
// operation.
type ListFirewallConfigsAPIClient interface {
	ListFirewallConfigs(context.Context, *ListFirewallConfigsInput, ...func(*Options)) (*ListFirewallConfigsOutput, error)
}

var _ ListFirewallConfigsAPIClient = (*Client)(nil)

// ListFirewallConfigsPaginatorOptions is the paginator options for
// ListFirewallConfigs
type ListFirewallConfigsPaginatorOptions struct {
	// The maximum number of objects that you want Resolver to return for this request.
	// If more objects are available, in the response, Resolver provides a NextToken
	// value that you can use in a subsequent call to get the next batch of objects. If
	// you don't specify a value for MaxResults, Resolver returns up to 100 objects.
	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
}

// ListFirewallConfigsPaginator is a paginator for ListFirewallConfigs
type ListFirewallConfigsPaginator struct {
	options   ListFirewallConfigsPaginatorOptions
	client    ListFirewallConfigsAPIClient
	params    *ListFirewallConfigsInput
	nextToken *string
	firstPage bool
}

// NewListFirewallConfigsPaginator returns a new ListFirewallConfigsPaginator
func NewListFirewallConfigsPaginator(client ListFirewallConfigsAPIClient, params *ListFirewallConfigsInput, optFns ...func(*ListFirewallConfigsPaginatorOptions)) *ListFirewallConfigsPaginator {
	if params == nil {
		params = &ListFirewallConfigsInput{}
	}

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

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

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

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

// NextPage retrieves the next ListFirewallConfigs page.
func (p *ListFirewallConfigsPaginator) NextPage(ctx context.Context, optFns ...func(*Options)) (*ListFirewallConfigsOutput, 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.ListFirewallConfigs(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_opListFirewallConfigs(region string) *awsmiddleware.RegisterServiceMetadata {
	return &awsmiddleware.RegisterServiceMetadata{
		Region:        region,
		ServiceID:     ServiceID,
		SigningName:   "route53resolver",
		OperationName: "ListFirewallConfigs",
	}
}
