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


package ecs

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

// Returns a list of tasks. You can filter the results by cluster, task definition
// family, container instance, launch type, what IAM principal started the task, or
// by the desired status of the task.
//
// Recently stopped tasks might appear in the returned results.
func (c *Client) ListTasks(ctx context.Context, params *ListTasksInput, optFns ...func(*Options)) (*ListTasksOutput, error) {
	if params == nil { params = &ListTasksInput{} }
	
	result, metadata, err := c.invokeOperation(ctx, "ListTasks", params, optFns, c.addOperationListTasksMiddlewares)
	if err != nil { return nil, err }
	
	out := result.(*ListTasksOutput)
	out.ResultMetadata = metadata
	return out, nil
}

type ListTasksInput struct {
	
	// The short name or full Amazon Resource Name (ARN) of the cluster to use when
	// filtering the ListTasks results. If you do not specify a cluster, the default
	// cluster is assumed.
	Cluster *string
	
	// The container instance ID or full ARN of the container instance to use when
	// filtering the ListTasks results. Specifying a containerInstance limits the
	// results to tasks that belong to that container instance.
	ContainerInstance *string
	
	// The task desired status to use when filtering the ListTasks results. Specifying
	// a desiredStatus of STOPPED limits the results to tasks that Amazon ECS has set
	// the desired status to STOPPED . This can be useful for debugging tasks that
	// aren't starting properly or have died or finished. The default status filter is
	// RUNNING , which shows tasks that Amazon ECS has set the desired status to
	// RUNNING .
	//
	// Although you can filter results based on a desired status of PENDING , this
	// doesn't return any results. Amazon ECS never sets the desired status of a task
	// to that value (only a task's lastStatus may have a value of PENDING ).
	DesiredStatus types.DesiredStatus
	
	// The name of the task definition family to use when filtering the ListTasks
	// results. Specifying a family limits the results to tasks that belong to that
	// family.
	Family *string
	
	// The launch type to use when filtering the ListTasks results.
	LaunchType types.LaunchType
	
	// The maximum number of task results that ListTasks returned in paginated output.
	// When this parameter is used, ListTasks only returns maxResults results in a
	// single page along with a nextToken response element. The remaining results of
	// the initial request can be seen by sending another ListTasks request with the
	// returned nextToken value. This value can be between 1 and 100. If this
	// parameter isn't used, then ListTasks returns up to 100 results and a nextToken
	// value if applicable.
	MaxResults *int32
	
	// The nextToken value returned from a ListTasks request indicating that more
	// results are available to fulfill the request and further calls will be needed.
	// If maxResults was provided, it's possible the number of results to be fewer
	// than maxResults .
	//
	// This token should be treated as an opaque identifier that is only used to
	// retrieve the next items in a list and not for other programmatic purposes.
	NextToken *string
	
	// The name of the service to use when filtering the ListTasks results. Specifying
	// a serviceName limits the results to tasks that belong to that service.
	ServiceName *string
	
	// The startedBy value to filter the task results with. Specifying a startedBy
	// value limits the results to tasks that were started with that value.
	//
	// When you specify startedBy as the filter, it must be the only filter that you
	// use.
	StartedBy *string
	
	noSmithyDocumentSerde
}

type ListTasksOutput struct {
	
	// The nextToken value to include in a future ListTasks request. When the results
	// of a ListTasks request exceed maxResults , this value can be used to retrieve
	// the next page of results. This value is null when there are no more results to
	// return.
	NextToken *string
	
	// The list of task ARN entries for the ListTasks request.
	TaskArns []string
	
	// Metadata pertaining to the operation's result.
	ResultMetadata middleware.Metadata
	
	noSmithyDocumentSerde
}

func (c *Client) addOperationListTasksMiddlewares(stack *middleware.Stack, options Options) (err error) {
	if err := stack.Serialize.Add(&setOperationInputMiddleware{}, middleware.After); err != nil {
	    return err
	}
	err = stack.Serialize.Add(&awsAwsjson11_serializeOpListTasks{}, middleware.After)
	if err != nil { return err }
	err = stack.Deserialize.Add(&awsAwsjson11_deserializeOpListTasks{}, middleware.After)
	if err != nil { return err }
	if err := addProtocolFinalizerMiddlewares(stack, options, "ListTasks"); err != nil {
	    return fmt.Errorf("add protocol finalizers: %v", err)
	}
	
	if err = addlegacyEndpointContextSetter(stack, options); err != nil {
	return err
	}
	if err = addSetLoggerMiddleware(stack, options); err != nil {
	return err
	}
	if err = addClientRequestID(stack); err != nil {
	return err
	}
	if err = addComputeContentLength(stack); err != nil {
	return err
	}
	if err = addResolveEndpointMiddleware(stack, options); err != nil {
	return err
	}
	if err = addComputePayloadSHA256(stack); err != nil {
	return err
	}
	if err = addRetry(stack, options); err != nil {
	return err
	}
	if err = addRawResponseToMetadata(stack); err != nil {
	return err
	}
	if err = addRecordResponseTiming(stack); err != nil {
	return err
	}
	if err = addSpanRetryLoop(stack, options); 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 = addSetLegacyContextSigningOptionsMiddleware(stack); err != nil {
	return err
	}
	if err = addTimeOffsetBuild(stack, c); err != nil {
	return err
	}
	if err = addUserAgentRetryMode(stack, options); err != nil {
	return err
	}
	if err = stack.Initialize.Add(newServiceMetadataMiddleware_opListTasks(options.Region, ), middleware.Before); err != nil {
	return err
	}
	if err = 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
	}
	if err = addDisableHTTPSMiddleware(stack, options); err != nil {
	return err
	}
	if err = addSpanInitializeStart(stack); err != nil {
	return err
	}
	if err = addSpanInitializeEnd(stack); err != nil {
	return err
	}
	if err = addSpanBuildRequestStart(stack); err != nil {
	return err
	}
	if err = addSpanBuildRequestEnd(stack); err != nil {
	return err
	}
	return nil
}

// ListTasksPaginatorOptions is the paginator options for ListTasks
type ListTasksPaginatorOptions struct {
	// The maximum number of task results that ListTasks returned in paginated output.
	// When this parameter is used, ListTasks only returns maxResults results in a
	// single page along with a nextToken response element. The remaining results of
	// the initial request can be seen by sending another ListTasks request with the
	// returned nextToken value. This value can be between 1 and 100. If this
	// parameter isn't used, then ListTasks returns up to 100 results and a nextToken
	// value if applicable.
	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
}

// ListTasksPaginator is a paginator for ListTasks
type ListTasksPaginator struct {
    options ListTasksPaginatorOptions
    client ListTasksAPIClient
    params *ListTasksInput
    nextToken *string
    firstPage bool
}

// NewListTasksPaginator returns a new ListTasksPaginator
func NewListTasksPaginator(client ListTasksAPIClient, params *ListTasksInput, optFns ...func(*ListTasksPaginatorOptions)) *ListTasksPaginator {
	if params == nil {
	    params = &ListTasksInput{}
	}
	
	options := ListTasksPaginatorOptions{}
	if params.MaxResults != nil {
		options.Limit = *params.MaxResults
	}
	
	for _, fn := range optFns {
	    fn(&options)
	}
	
	return &ListTasksPaginator{
	    options: options,
	    client: client,
	    params: params,
	    firstPage: true,
	    nextToken: params.NextToken,
	}
}

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

// NextPage retrieves the next ListTasks page.
func (p *ListTasksPaginator) NextPage(ctx context.Context, optFns ...func(*Options)) (*ListTasksOutput, 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
	
	optFns = append([]func(*Options) {
	    addIsPaginatorUserAgent,
	}, optFns...)
	result, err := p.client.ListTasks(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
}

// ListTasksAPIClient is a client that implements the ListTasks operation.
type ListTasksAPIClient interface {
	ListTasks(context.Context, *ListTasksInput, ...func(*Options)) (*ListTasksOutput, error)
}

var _ ListTasksAPIClient = (*Client)(nil)

func newServiceMetadataMiddleware_opListTasks(region string) *awsmiddleware.RegisterServiceMetadata {
	 return &awsmiddleware.RegisterServiceMetadata{
	Region: region,
	ServiceID: ServiceID,
	OperationName: "ListTasks",
	}
}
