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

package ec2

import (
	"context"
	"fmt"
	awsmiddleware "github.com/aws/aws-sdk-go-v2/aws/middleware"
	"github.com/aws/aws-sdk-go-v2/service/ec2/types"
	"github.com/aws/smithy-go/middleware"
	smithyhttp "github.com/aws/smithy-go/transport/http"
)

// Describes the running instances for the specified EC2 Fleet.
//
// Currently, DescribeFleetInstances does not support fleets of type instant .
// Instead, use DescribeFleets , specifying the instant fleet ID in the request.
//
// For more information, see [Describe your EC2 Fleet] in the Amazon EC2 User Guide.
//
// [Describe your EC2 Fleet]: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/manage-ec2-fleet.html#monitor-ec2-fleet
func (c *Client) DescribeFleetInstances(ctx context.Context, params *DescribeFleetInstancesInput, optFns ...func(*Options)) (*DescribeFleetInstancesOutput, error) {
	if params == nil {
		params = &DescribeFleetInstancesInput{}
	}

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

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

type DescribeFleetInstancesInput struct {

	// The ID of the EC2 Fleet.
	//
	// This member is required.
	FleetId *string

	// Checks whether you have the required permissions for the action, without
	// actually making the request, and provides an error response. If you have the
	// required permissions, the error response is DryRunOperation . Otherwise, it is
	// UnauthorizedOperation .
	DryRun *bool

	// The filters.
	//
	//   - instance-type - The instance type.
	Filters []types.Filter

	// The maximum number of items to return for this request. To get the next page of
	// items, make another request with the token returned in the output. For more
	// information, see [Pagination].
	//
	// [Pagination]: https://docs.aws.amazon.com/AWSEC2/latest/APIReference/Query-Requests.html#api-pagination
	MaxResults *int32

	// The token returned from a previous paginated request. Pagination continues from
	// the end of the items returned by the previous request.
	NextToken *string

	noSmithyDocumentSerde
}

type DescribeFleetInstancesOutput struct {

	// The running instances. This list is refreshed periodically and might be out of
	// date.
	ActiveInstances []types.ActiveInstance

	// The ID of the EC2 Fleet.
	FleetId *string

	// The token to include in another request to get the next page of items. This
	// value is null when there are no more items to return.
	NextToken *string

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

	noSmithyDocumentSerde
}

func (c *Client) addOperationDescribeFleetInstancesMiddlewares(stack *middleware.Stack, options Options) (err error) {
	if err := stack.Serialize.Add(&setOperationInputMiddleware{}, middleware.After); err != nil {
		return err
	}
	err = stack.Serialize.Add(&awsEc2query_serializeOpDescribeFleetInstances{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsEc2query_deserializeOpDescribeFleetInstances{}, middleware.After)
	if err != nil {
		return err
	}
	if err := addProtocolFinalizerMiddlewares(stack, options, "DescribeFleetInstances"); 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, c); 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 = addUserAgentRetryMode(stack, options); err != nil {
		return err
	}
	if err = addCredentialSource(stack, options); err != nil {
		return err
	}
	if err = addOpDescribeFleetInstancesValidationMiddleware(stack); err != nil {
		return err
	}
	if err = stack.Initialize.Add(newServiceMetadataMiddleware_opDescribeFleetInstances(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 = addInterceptBeforeRetryLoop(stack, options); err != nil {
		return err
	}
	if err = addInterceptAttempt(stack, options); err != nil {
		return err
	}
	if err = addInterceptors(stack, options); err != nil {
		return err
	}
	return nil
}

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