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

package swf

import (
	"context"
	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/swf/types"
	"github.com/aws/smithy-go/middleware"
	smithyhttp "github.com/aws/smithy-go/transport/http"
)

// Returns the estimated number of activity tasks in the specified task list. The
// count returned is an approximation and isn't guaranteed to be exact. If you
// specify a task list that no activity task was ever scheduled in then 0 is
// returned. Access Control You can use IAM policies to control this action's
// access to Amazon SWF resources as follows:
//   - Use a Resource element with the domain name to limit the action to only
//     specified domains.
//   - Use an Action element to allow or deny permission to call this action.
//   - Constrain the taskList.name parameter by using a Condition element with the
//     swf:taskList.name key to allow the action to access only certain task lists.
//
// If the caller doesn't have sufficient permissions to invoke the action, or the
// parameter values fall outside the specified constraints, the action fails. The
// associated event attribute's cause parameter is set to OPERATION_NOT_PERMITTED .
// For details and example IAM policies, see Using IAM to Manage Access to Amazon
// SWF Workflows (https://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dev-iam.html)
// in the Amazon SWF Developer Guide.
func (c *Client) CountPendingActivityTasks(ctx context.Context, params *CountPendingActivityTasksInput, optFns ...func(*Options)) (*CountPendingActivityTasksOutput, error) {
	if params == nil {
		params = &CountPendingActivityTasksInput{}
	}

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

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

type CountPendingActivityTasksInput struct {

	// The name of the domain that contains the task list.
	//
	// This member is required.
	Domain *string

	// The name of the task list.
	//
	// This member is required.
	TaskList *types.TaskList

	noSmithyDocumentSerde
}

// Contains the count of tasks in a task list.
type CountPendingActivityTasksOutput struct {

	// The number of tasks in the task list.
	//
	// This member is required.
	Count int32

	// If set to true, indicates that the actual count was more than the maximum
	// supported by this API and the count returned is the truncated value.
	Truncated bool

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

	noSmithyDocumentSerde
}

func (c *Client) addOperationCountPendingActivityTasksMiddlewares(stack *middleware.Stack, options Options) (err error) {
	err = stack.Serialize.Add(&awsAwsjson10_serializeOpCountPendingActivityTasks{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsAwsjson10_deserializeOpCountPendingActivityTasks{}, 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 = addOpCountPendingActivityTasksValidationMiddleware(stack); err != nil {
		return err
	}
	if err = stack.Initialize.Add(newServiceMetadataMiddleware_opCountPendingActivityTasks(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
}

func newServiceMetadataMiddleware_opCountPendingActivityTasks(region string) *awsmiddleware.RegisterServiceMetadata {
	return &awsmiddleware.RegisterServiceMetadata{
		Region:        region,
		ServiceID:     ServiceID,
		SigningName:   "swf",
		OperationName: "CountPendingActivityTasks",
	}
}