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

package autoscaling

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

//	We strongly recommend that all Auto Scaling groups use launch templates to
//
// ensure full functionality for Amazon EC2 Auto Scaling and Amazon EC2.
//
// Updates the configuration for the specified Auto Scaling group.
//
// To update an Auto Scaling group, specify the name of the group and the property
// that you want to change. Any properties that you don't specify are not changed
// by this update request. The new settings take effect on any scaling activities
// after this call returns.
//
// If you associate a new launch configuration or template with an Auto Scaling
// group, all new instances will get the updated configuration. Existing instances
// continue to run with the configuration that they were originally launched with.
// When you update a group to specify a mixed instances policy instead of a launch
// configuration or template, existing instances may be replaced to match the new
// purchasing options that you specified in the policy. For example, if the group
// currently has 100% On-Demand capacity and the policy specifies 50% Spot
// capacity, this means that half of your instances will be gradually terminated
// and relaunched as Spot Instances. When replacing instances, Amazon EC2 Auto
// Scaling launches new instances before terminating the old ones, so that updating
// your group does not compromise the performance or availability of your
// application.
//
// Note the following about changing DesiredCapacity , MaxSize , or MinSize :
//
//   - If a scale-in activity occurs as a result of a new DesiredCapacity value
//     that is lower than the current size of the group, the Auto Scaling group uses
//     its termination policy to determine which instances to terminate.
//
//   - If you specify a new value for MinSize without specifying a value for
//     DesiredCapacity , and the new MinSize is larger than the current size of the
//     group, this sets the group's DesiredCapacity to the new MinSize value.
//
//   - If you specify a new value for MaxSize without specifying a value for
//     DesiredCapacity , and the new MaxSize is smaller than the current size of the
//     group, this sets the group's DesiredCapacity to the new MaxSize value.
//
// To see which properties have been set, call the [DescribeAutoScalingGroups] API. To view the scaling
// policies for an Auto Scaling group, call the [DescribePolicies]API. If the group has scaling
// policies, you can update them by calling the [PutScalingPolicy]API.
//
// [DescribeAutoScalingGroups]: https://docs.aws.amazon.com/autoscaling/ec2/APIReference/API_DescribeAutoScalingGroups.html
// [DescribePolicies]: https://docs.aws.amazon.com/autoscaling/ec2/APIReference/API_DescribePolicies.html
// [PutScalingPolicy]: https://docs.aws.amazon.com/autoscaling/ec2/APIReference/API_PutScalingPolicy.html
func (c *Client) UpdateAutoScalingGroup(ctx context.Context, params *UpdateAutoScalingGroupInput, optFns ...func(*Options)) (*UpdateAutoScalingGroupOutput, error) {
	if params == nil {
		params = &UpdateAutoScalingGroupInput{}
	}

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

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

type UpdateAutoScalingGroupInput struct {

	// The name of the Auto Scaling group.
	//
	// This member is required.
	AutoScalingGroupName *string

	//  The instance capacity distribution across Availability Zones.
	AvailabilityZoneDistribution *types.AvailabilityZoneDistribution

	//  The policy for Availability Zone impairment.
	AvailabilityZoneImpairmentPolicy *types.AvailabilityZoneImpairmentPolicy

	// One or more Availability Zones for the group.
	AvailabilityZones []string

	// Enables or disables Capacity Rebalancing. If Capacity Rebalancing is disabled,
	// proactive replacement of at-risk Spot Instances does not occur. For more
	// information, see [Capacity Rebalancing in Auto Scaling to replace at-risk Spot Instances]in the Amazon EC2 Auto Scaling User Guide.
	//
	// To suspend rebalancing across Availability Zones, use the [SuspendProcesses] API.
	//
	// [SuspendProcesses]: https://docs.aws.amazon.com/autoscaling/ec2/APIReference/API_SuspendedProcess.html
	// [Capacity Rebalancing in Auto Scaling to replace at-risk Spot Instances]: https://docs.aws.amazon.com/autoscaling/ec2/userguide/ec2-auto-scaling-capacity-rebalancing.html
	CapacityRebalance *bool

	//  The capacity reservation specification for the Auto Scaling group.
	CapacityReservationSpecification *types.CapacityReservationSpecification

	// Reserved.
	Context *string

	//  Only needed if you use simple scaling policies.
	//
	// The amount of time, in seconds, between one scaling activity ending and another
	// one starting due to simple scaling policies. For more information, see [Scaling cooldowns for Amazon EC2 Auto Scaling]in the
	// Amazon EC2 Auto Scaling User Guide.
	//
	// [Scaling cooldowns for Amazon EC2 Auto Scaling]: https://docs.aws.amazon.com/autoscaling/ec2/userguide/ec2-auto-scaling-scaling-cooldowns.html
	DefaultCooldown *int32

	// The amount of time, in seconds, until a new instance is considered to have
	// finished initializing and resource consumption to become stable after it enters
	// the InService state.
	//
	// During an instance refresh, Amazon EC2 Auto Scaling waits for the warm-up
	// period after it replaces an instance before it moves on to replacing the next
	// instance. Amazon EC2 Auto Scaling also waits for the warm-up period before
	// aggregating the metrics for new instances with existing instances in the Amazon
	// CloudWatch metrics that are used for scaling, resulting in more reliable usage
	// data. For more information, see [Set the default instance warmup for an Auto Scaling group]in the Amazon EC2 Auto Scaling User Guide.
	//
	// To manage various warm-up settings at the group level, we recommend that you
	// set the default instance warmup, even if it is set to 0 seconds. To remove a
	// value that you previously set, include the property but specify -1 for the
	// value. However, we strongly recommend keeping the default instance warmup
	// enabled by specifying a value of 0 or other nominal value.
	//
	// [Set the default instance warmup for an Auto Scaling group]: https://docs.aws.amazon.com/autoscaling/ec2/userguide/ec2-auto-scaling-default-instance-warmup.html
	DefaultInstanceWarmup *int32

	// The desired capacity is the initial capacity of the Auto Scaling group after
	// this operation completes and the capacity it attempts to maintain. This number
	// must be greater than or equal to the minimum size of the group and less than or
	// equal to the maximum size of the group.
	DesiredCapacity *int32

	// The unit of measurement for the value specified for desired capacity. Amazon
	// EC2 Auto Scaling supports DesiredCapacityType for attribute-based instance type
	// selection only. For more information, see [Create a mixed instances group using attribute-based instance type selection]in the Amazon EC2 Auto Scaling User
	// Guide.
	//
	// By default, Amazon EC2 Auto Scaling specifies units , which translates into
	// number of instances.
	//
	// Valid values: units | vcpu | memory-mib
	//
	// [Create a mixed instances group using attribute-based instance type selection]: https://docs.aws.amazon.com/autoscaling/ec2/userguide/create-mixed-instances-group-attribute-based-instance-type-selection.html
	DesiredCapacityType *string

	// The amount of time, in seconds, that Amazon EC2 Auto Scaling waits before
	// checking the health status of an EC2 instance that has come into service and
	// marking it unhealthy due to a failed health check. This is useful if your
	// instances do not immediately pass their health checks after they enter the
	// InService state. For more information, see [Set the health check grace period for an Auto Scaling group] in the Amazon EC2 Auto Scaling User
	// Guide.
	//
	// [Set the health check grace period for an Auto Scaling group]: https://docs.aws.amazon.com/autoscaling/ec2/userguide/health-check-grace-period.html
	HealthCheckGracePeriod *int32

	// A comma-separated value string of one or more health check types.
	//
	// The valid values are EC2 , EBS , ELB , and VPC_LATTICE . EC2 is the default
	// health check and cannot be disabled. For more information, see [Health checks for instances in an Auto Scaling group]in the Amazon
	// EC2 Auto Scaling User Guide.
	//
	// Only specify EC2 if you must clear a value that was previously set.
	//
	// [Health checks for instances in an Auto Scaling group]: https://docs.aws.amazon.com/autoscaling/ec2/userguide/ec2-auto-scaling-health-checks.html
	HealthCheckType *string

	// An instance maintenance policy. For more information, see [Set instance maintenance policy] in the Amazon EC2
	// Auto Scaling User Guide.
	//
	// [Set instance maintenance policy]: https://docs.aws.amazon.com/autoscaling/ec2/userguide/ec2-auto-scaling-instance-maintenance-policy.html
	InstanceMaintenancePolicy *types.InstanceMaintenancePolicy

	// The name of the launch configuration. If you specify LaunchConfigurationName in
	// your update request, you can't specify LaunchTemplate or MixedInstancesPolicy .
	LaunchConfigurationName *string

	// The launch template and version to use to specify the updates. If you specify
	// LaunchTemplate in your update request, you can't specify LaunchConfigurationName
	// or MixedInstancesPolicy .
	LaunchTemplate *types.LaunchTemplateSpecification

	// The maximum amount of time, in seconds, that an instance can be in service. The
	// default is null. If specified, the value must be either 0 or a number equal to
	// or greater than 86,400 seconds (1 day). To clear a previously set value, specify
	// a new value of 0. For more information, see [Replacing Auto Scaling instances based on maximum instance lifetime]in the Amazon EC2 Auto Scaling User
	// Guide.
	//
	// [Replacing Auto Scaling instances based on maximum instance lifetime]: https://docs.aws.amazon.com/autoscaling/ec2/userguide/asg-max-instance-lifetime.html
	MaxInstanceLifetime *int32

	// The maximum size of the Auto Scaling group.
	//
	// With a mixed instances policy that uses instance weighting, Amazon EC2 Auto
	// Scaling may need to go above MaxSize to meet your capacity requirements. In
	// this event, Amazon EC2 Auto Scaling will never go above MaxSize by more than
	// your largest instance weight (weights that define how many units each instance
	// contributes to the desired capacity of the group).
	MaxSize *int32

	// The minimum size of the Auto Scaling group.
	MinSize *int32

	// The mixed instances policy. For more information, see [Auto Scaling groups with multiple instance types and purchase options] in the Amazon EC2 Auto
	// Scaling User Guide.
	//
	// [Auto Scaling groups with multiple instance types and purchase options]: https://docs.aws.amazon.com/autoscaling/ec2/userguide/ec2-auto-scaling-mixed-instances-groups.html
	MixedInstancesPolicy *types.MixedInstancesPolicy

	// Indicates whether newly launched instances are protected from termination by
	// Amazon EC2 Auto Scaling when scaling in. For more information about preventing
	// instances from terminating on scale in, see [Use instance scale-in protection]in the Amazon EC2 Auto Scaling User
	// Guide.
	//
	// [Use instance scale-in protection]: https://docs.aws.amazon.com/autoscaling/ec2/userguide/ec2-auto-scaling-instance-protection.html
	NewInstancesProtectedFromScaleIn *bool

	// The name of an existing placement group into which to launch your instances. To
	// remove the placement group setting, pass an empty string for placement-group .
	// For more information about placement groups, see [Placement groups]in the Amazon EC2 User Guide
	// for Linux Instances.
	//
	// A cluster placement group is a logical grouping of instances within a single
	// Availability Zone. You cannot specify multiple Availability Zones and a cluster
	// placement group.
	//
	// [Placement groups]: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/placement-groups.html
	PlacementGroup *string

	// The Amazon Resource Name (ARN) of the service-linked role that the Auto Scaling
	// group uses to call other Amazon Web Services on your behalf. For more
	// information, see [Service-linked roles]in the Amazon EC2 Auto Scaling User Guide.
	//
	// [Service-linked roles]: https://docs.aws.amazon.com/autoscaling/ec2/userguide/autoscaling-service-linked-role.html
	ServiceLinkedRoleARN *string

	//  If you enable zonal shift with cross-zone disabled load balancers, capacity
	// could become imbalanced across Availability Zones. To skip the validation,
	// specify true . For more information, see [Auto Scaling group zonal shift] in the Amazon EC2 Auto Scaling User
	// Guide.
	//
	// [Auto Scaling group zonal shift]: https://docs.aws.amazon.com/autoscaling/ec2/userguide/ec2-auto-scaling-zonal-shift.html
	SkipZonalShiftValidation *bool

	// A policy or a list of policies that are used to select the instances to
	// terminate. The policies are executed in the order that you list them. For more
	// information, see [Configure termination policies for Amazon EC2 Auto Scaling]in the Amazon EC2 Auto Scaling User Guide.
	//
	// Valid values: Default | AllocationStrategy | ClosestToNextInstanceHour |
	// NewestInstance | OldestInstance | OldestLaunchConfiguration |
	// OldestLaunchTemplate |
	// arn:aws:lambda:region:account-id:function:my-function:my-alias
	//
	// [Configure termination policies for Amazon EC2 Auto Scaling]: https://docs.aws.amazon.com/autoscaling/ec2/userguide/ec2-auto-scaling-termination-policies.html
	TerminationPolicies []string

	// A comma-separated list of subnet IDs for a virtual private cloud (VPC). If you
	// specify VPCZoneIdentifier with AvailabilityZones , the subnets that you specify
	// must reside in those Availability Zones.
	VPCZoneIdentifier *string

	noSmithyDocumentSerde
}

type UpdateAutoScalingGroupOutput struct {
	// Metadata pertaining to the operation's result.
	ResultMetadata middleware.Metadata

	noSmithyDocumentSerde
}

func (c *Client) addOperationUpdateAutoScalingGroupMiddlewares(stack *middleware.Stack, options Options) (err error) {
	if err := stack.Serialize.Add(&setOperationInputMiddleware{}, middleware.After); err != nil {
		return err
	}
	err = stack.Serialize.Add(&awsAwsquery_serializeOpUpdateAutoScalingGroup{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsAwsquery_deserializeOpUpdateAutoScalingGroup{}, middleware.After)
	if err != nil {
		return err
	}
	if err := addProtocolFinalizerMiddlewares(stack, options, "UpdateAutoScalingGroup"); 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 = addCredentialSource(stack, options); err != nil {
		return err
	}
	if err = addOpUpdateAutoScalingGroupValidationMiddleware(stack); err != nil {
		return err
	}
	if err = stack.Initialize.Add(newServiceMetadataMiddleware_opUpdateAutoScalingGroup(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
}

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