// 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"
)

// Starts an Amazon EBS-backed instance that you've previously stopped.
//
// Instances that use Amazon EBS volumes as their root devices can be quickly
// stopped and started. When an instance is stopped, the compute resources are
// released and you are not billed for instance usage. However, your root partition
// Amazon EBS volume remains and continues to persist your data, and you are
// charged for Amazon EBS volume usage. You can restart your instance at any time.
// Every time you start your instance, Amazon EC2 charges a one-minute minimum for
// instance usage, and thereafter charges per second for instance usage.
//
// Before stopping an instance, make sure it is in a state from which it can be
// restarted. Stopping an instance does not preserve data stored in RAM.
//
// Performing this operation on an instance that uses an instance store as its
// root device returns an error.
//
// If you attempt to start a T3 instance with host tenancy and the unlimited CPU
// credit option, the request fails. The unlimited CPU credit option is not
// supported on Dedicated Hosts. Before you start the instance, either change its
// CPU credit option to standard , or change its tenancy to default or dedicated .
//
// For more information, see [Stop and start Amazon EC2 instances] in the Amazon EC2 User Guide.
//
// [Stop and start Amazon EC2 instances]: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/Stop_Start.html
func (c *Client) StartInstances(ctx context.Context, params *StartInstancesInput, optFns ...func(*Options)) (*StartInstancesOutput, error) {
	if params == nil {
		params = &StartInstancesInput{}
	}

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

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

type StartInstancesInput struct {

	// The IDs of the instances.
	//
	// This member is required.
	InstanceIds []string

	// Reserved.
	AdditionalInfo *string

	// Checks whether you have the required permissions for the operation, 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

	noSmithyDocumentSerde
}

type StartInstancesOutput struct {

	// Information about the started instances.
	StartingInstances []types.InstanceStateChange

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

	noSmithyDocumentSerde
}

func (c *Client) addOperationStartInstancesMiddlewares(stack *middleware.Stack, options Options) (err error) {
	if err := stack.Serialize.Add(&setOperationInputMiddleware{}, middleware.After); err != nil {
		return err
	}
	err = stack.Serialize.Add(&awsEc2query_serializeOpStartInstances{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsEc2query_deserializeOpStartInstances{}, middleware.After)
	if err != nil {
		return err
	}
	if err := addProtocolFinalizerMiddlewares(stack, options, "StartInstances"); 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 = addOpStartInstancesValidationMiddleware(stack); err != nil {
		return err
	}
	if err = stack.Initialize.Add(newServiceMetadataMiddleware_opStartInstances(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_opStartInstances(region string) *awsmiddleware.RegisterServiceMetadata {
	return &awsmiddleware.RegisterServiceMetadata{
		Region:        region,
		ServiceID:     ServiceID,
		OperationName: "StartInstances",
	}
}