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

package sesv2

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/sesv2/types"
	"github.com/aws/smithy-go/middleware"
	smithyhttp "github.com/aws/smithy-go/transport/http"
)

// Lists the email templates present in your Amazon SES account in the current
// Amazon Web Services Region. You can execute this operation no more than once per
// second.
func (c *Client) ListEmailTemplates(ctx context.Context, params *ListEmailTemplatesInput, optFns ...func(*Options)) (*ListEmailTemplatesOutput, error) {
	if params == nil {
		params = &ListEmailTemplatesInput{}
	}

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

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

// Represents a request to list the email templates present in your Amazon SES
// account in the current Amazon Web Services Region. For more information, see the
// Amazon SES Developer Guide
// (https://docs.aws.amazon.com/ses/latest/DeveloperGuide/send-personalized-email-api.html).
type ListEmailTemplatesInput struct {

	// A token returned from a previous call to ListEmailTemplates to indicate the
	// position in the list of email templates.
	NextToken *string

	// The number of results to show in a single call to ListEmailTemplates. If the
	// number of results is larger than the number you specified in this parameter,
	// then the response includes a NextToken element, which you can use to obtain
	// additional results. The value you specify has to be at least 1, and can be no
	// more than 10.
	PageSize *int32

	noSmithyDocumentSerde
}

// The following elements are returned by the service.
type ListEmailTemplatesOutput struct {

	// A token indicating that there are additional email templates available to be
	// listed. Pass this token to a subsequent ListEmailTemplates call to retrieve the
	// next 10 email templates.
	NextToken *string

	// An array the contains the name and creation time stamp for each template in your
	// Amazon SES account.
	TemplatesMetadata []types.EmailTemplateMetadata

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

	noSmithyDocumentSerde
}

func (c *Client) addOperationListEmailTemplatesMiddlewares(stack *middleware.Stack, options Options) (err error) {
	err = stack.Serialize.Add(&awsRestjson1_serializeOpListEmailTemplates{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsRestjson1_deserializeOpListEmailTemplates{}, 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_opListEmailTemplates(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
}

// ListEmailTemplatesAPIClient is a client that implements the ListEmailTemplates
// operation.
type ListEmailTemplatesAPIClient interface {
	ListEmailTemplates(context.Context, *ListEmailTemplatesInput, ...func(*Options)) (*ListEmailTemplatesOutput, error)
}

var _ ListEmailTemplatesAPIClient = (*Client)(nil)

// ListEmailTemplatesPaginatorOptions is the paginator options for
// ListEmailTemplates
type ListEmailTemplatesPaginatorOptions struct {
	// The number of results to show in a single call to ListEmailTemplates. If the
	// number of results is larger than the number you specified in this parameter,
	// then the response includes a NextToken element, which you can use to obtain
	// additional results. The value you specify has to be at least 1, and can be no
	// more than 10.
	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
}

// ListEmailTemplatesPaginator is a paginator for ListEmailTemplates
type ListEmailTemplatesPaginator struct {
	options   ListEmailTemplatesPaginatorOptions
	client    ListEmailTemplatesAPIClient
	params    *ListEmailTemplatesInput
	nextToken *string
	firstPage bool
}

// NewListEmailTemplatesPaginator returns a new ListEmailTemplatesPaginator
func NewListEmailTemplatesPaginator(client ListEmailTemplatesAPIClient, params *ListEmailTemplatesInput, optFns ...func(*ListEmailTemplatesPaginatorOptions)) *ListEmailTemplatesPaginator {
	if params == nil {
		params = &ListEmailTemplatesInput{}
	}

	options := ListEmailTemplatesPaginatorOptions{}
	if params.PageSize != nil {
		options.Limit = *params.PageSize
	}

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

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

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

// NextPage retrieves the next ListEmailTemplates page.
func (p *ListEmailTemplatesPaginator) NextPage(ctx context.Context, optFns ...func(*Options)) (*ListEmailTemplatesOutput, 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.PageSize = limit

	result, err := p.client.ListEmailTemplates(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_opListEmailTemplates(region string) *awsmiddleware.RegisterServiceMetadata {
	return &awsmiddleware.RegisterServiceMetadata{
		Region:        region,
		ServiceID:     ServiceID,
		SigningName:   "ses",
		OperationName: "ListEmailTemplates",
	}
}
