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

package migrationhub

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

// Lists all, or filtered by resource name, migration tasks associated with the
// user account making this call. This API has the following traits:
//   - Can show a summary list of the most recent migration tasks.
//   - Can show a summary list of migration tasks associated with a given
//     discovered resource.
//   - Lists migration tasks in a paginated interface.
func (c *Client) ListMigrationTasks(ctx context.Context, params *ListMigrationTasksInput, optFns ...func(*Options)) (*ListMigrationTasksOutput, error) {
	if params == nil {
		params = &ListMigrationTasksInput{}
	}

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

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

type ListMigrationTasksInput struct {

	// Value to specify how many results are returned per page.
	MaxResults *int32

	// If a NextToken was returned by a previous call, there are more results
	// available. To retrieve the next page of results, make the call again using the
	// returned token in NextToken .
	NextToken *string

	// Filter migration tasks by discovered resource name.
	ResourceName *string

	noSmithyDocumentSerde
}

type ListMigrationTasksOutput struct {

	// Lists the migration task's summary which includes: MigrationTaskName ,
	// ProgressPercent , ProgressUpdateStream , Status , and the UpdateDateTime for
	// each task.
	MigrationTaskSummaryList []types.MigrationTaskSummary

	// If there are more migration tasks than the max result, return the next token to
	// be passed to the next call as a bookmark of where to start from.
	NextToken *string

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

	noSmithyDocumentSerde
}

func (c *Client) addOperationListMigrationTasksMiddlewares(stack *middleware.Stack, options Options) (err error) {
	err = stack.Serialize.Add(&awsAwsjson11_serializeOpListMigrationTasks{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsAwsjson11_deserializeOpListMigrationTasks{}, 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_opListMigrationTasks(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
}

// ListMigrationTasksAPIClient is a client that implements the ListMigrationTasks
// operation.
type ListMigrationTasksAPIClient interface {
	ListMigrationTasks(context.Context, *ListMigrationTasksInput, ...func(*Options)) (*ListMigrationTasksOutput, error)
}

var _ ListMigrationTasksAPIClient = (*Client)(nil)

// ListMigrationTasksPaginatorOptions is the paginator options for
// ListMigrationTasks
type ListMigrationTasksPaginatorOptions struct {
	// Value to specify how many results are returned per page.
	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
}

// ListMigrationTasksPaginator is a paginator for ListMigrationTasks
type ListMigrationTasksPaginator struct {
	options   ListMigrationTasksPaginatorOptions
	client    ListMigrationTasksAPIClient
	params    *ListMigrationTasksInput
	nextToken *string
	firstPage bool
}

// NewListMigrationTasksPaginator returns a new ListMigrationTasksPaginator
func NewListMigrationTasksPaginator(client ListMigrationTasksAPIClient, params *ListMigrationTasksInput, optFns ...func(*ListMigrationTasksPaginatorOptions)) *ListMigrationTasksPaginator {
	if params == nil {
		params = &ListMigrationTasksInput{}
	}

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

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

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

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

// NextPage retrieves the next ListMigrationTasks page.
func (p *ListMigrationTasksPaginator) NextPage(ctx context.Context, optFns ...func(*Options)) (*ListMigrationTasksOutput, 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.ListMigrationTasks(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_opListMigrationTasks(region string) *awsmiddleware.RegisterServiceMetadata {
	return &awsmiddleware.RegisterServiceMetadata{
		Region:        region,
		ServiceID:     ServiceID,
		SigningName:   "mgh",
		OperationName: "ListMigrationTasks",
	}
}