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

package resourceexplorer2

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

// Lists the Amazon resource names (ARNs) (https://docs.aws.amazon.com/general/latest/gr/aws-arns-and-namespaces.html)
// of the views available in the Amazon Web Services Region in which you call this
// operation. Always check the NextToken response parameter for a null value when
// calling a paginated operation. These operations can occasionally return an empty
// set of results even when there are more results available. The NextToken
// response parameter value is null only when there are no more results to display.
func (c *Client) ListViews(ctx context.Context, params *ListViewsInput, optFns ...func(*Options)) (*ListViewsOutput, error) {
	if params == nil {
		params = &ListViewsInput{}
	}

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

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

type ListViewsInput struct {

	// The maximum number of results that you want included on each page of the
	// response. If you do not include this parameter, it defaults to a value
	// appropriate to the operation. If additional items exist beyond those included in
	// the current response, the NextToken response element is present and has a value
	// (is not null). Include that value as the NextToken request parameter in the
	// next call to the operation to get the next part of the results. An API operation
	// can return fewer results than the maximum even when there are more results
	// available. You should check NextToken after every operation to ensure that you
	// receive all of the results.
	MaxResults *int32

	// The parameter for receiving additional results if you receive a NextToken
	// response in a previous request. A NextToken response indicates that more output
	// is available. Set this parameter to the value of the previous call's NextToken
	// response to indicate where the output should continue from.
	NextToken *string

	noSmithyDocumentSerde
}

type ListViewsOutput struct {

	// If present, indicates that more output is available than is included in the
	// current response. Use this value in the NextToken request parameter in a
	// subsequent call to the operation to get the next part of the output. You should
	// repeat this until the NextToken response element comes back as null .
	NextToken *string

	// The list of views available in the Amazon Web Services Region in which you
	// called this operation.
	Views []string

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

	noSmithyDocumentSerde
}

func (c *Client) addOperationListViewsMiddlewares(stack *middleware.Stack, options Options) (err error) {
	err = stack.Serialize.Add(&awsRestjson1_serializeOpListViews{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsRestjson1_deserializeOpListViews{}, 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_opListViews(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
}

// ListViewsAPIClient is a client that implements the ListViews operation.
type ListViewsAPIClient interface {
	ListViews(context.Context, *ListViewsInput, ...func(*Options)) (*ListViewsOutput, error)
}

var _ ListViewsAPIClient = (*Client)(nil)

// ListViewsPaginatorOptions is the paginator options for ListViews
type ListViewsPaginatorOptions struct {
	// The maximum number of results that you want included on each page of the
	// response. If you do not include this parameter, it defaults to a value
	// appropriate to the operation. If additional items exist beyond those included in
	// the current response, the NextToken response element is present and has a value
	// (is not null). Include that value as the NextToken request parameter in the
	// next call to the operation to get the next part of the results. An API operation
	// can return fewer results than the maximum even when there are more results
	// available. You should check NextToken after every operation to ensure that you
	// receive all of the results.
	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
}

// ListViewsPaginator is a paginator for ListViews
type ListViewsPaginator struct {
	options   ListViewsPaginatorOptions
	client    ListViewsAPIClient
	params    *ListViewsInput
	nextToken *string
	firstPage bool
}

// NewListViewsPaginator returns a new ListViewsPaginator
func NewListViewsPaginator(client ListViewsAPIClient, params *ListViewsInput, optFns ...func(*ListViewsPaginatorOptions)) *ListViewsPaginator {
	if params == nil {
		params = &ListViewsInput{}
	}

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

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

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

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

// NextPage retrieves the next ListViews page.
func (p *ListViewsPaginator) NextPage(ctx context.Context, optFns ...func(*Options)) (*ListViewsOutput, 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.ListViews(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_opListViews(region string) *awsmiddleware.RegisterServiceMetadata {
	return &awsmiddleware.RegisterServiceMetadata{
		Region:        region,
		ServiceID:     ServiceID,
		SigningName:   "resource-explorer-2",
		OperationName: "ListViews",
	}
}