driver

type LBAttributes struct {
	IdleTimeout        int
	DeletionProtection bool
	AccessLogsEnabled  bool
	AccessLogsBucket   string
}

type LBConfig struct {
	Name    string
	Type    string // "application", "network"
	Scheme  string // "internet-facing", "internal"
	Subnets []string
	Tags    map[string]string
}

type LBInfo struct {
	ID      string
	ARN     string
	Name    string
	Type    string
	Scheme  string
	State   string
	DNSName string
	Subnets []string
	Tags    map[string]string
}

type ListenerConfig struct {
	LBARN          string
	Protocol       string
	Port           int
	TargetGroupARN string
}

type ListenerInfo struct {
	ARN            string
	LBARN          string
	Protocol       string
	Port           int
	TargetGroupARN string
}

type LoadBalancer interface {
	CreateLoadBalancer(ctx context.Context, config LBConfig) (*LBInfo, error)
	DeleteLoadBalancer(ctx context.Context, arn string) error
	DescribeLoadBalancers(ctx context.Context, arns []string) ([]LBInfo, error)

	CreateTargetGroup(ctx context.Context, config TargetGroupConfig) (*TargetGroupInfo, error)
	DeleteTargetGroup(ctx context.Context, arn string) error
	DescribeTargetGroups(ctx context.Context, arns []string) ([]TargetGroupInfo, error)

	CreateListener(ctx context.Context, config ListenerConfig) (*ListenerInfo, error)
	DeleteListener(ctx context.Context, arn string) error
	DescribeListeners(ctx context.Context, lbARN string) ([]ListenerInfo, error)

	CreateRule(ctx context.Context, config RuleConfig) (*RuleInfo, error)
	DeleteRule(ctx context.Context, ruleARN string) error
	DescribeRules(ctx context.Context, listenerARN string) ([]RuleInfo, error)

	ModifyListener(ctx context.Context, input ModifyListenerInput) error

	GetLBAttributes(ctx context.Context, lbARN string) (*LBAttributes, error)
	PutLBAttributes(ctx context.Context, lbARN string, attrs LBAttributes) error

	RegisterTargets(ctx context.Context, targetGroupARN string, targets []Target) error
	DeregisterTargets(ctx context.Context, targetGroupARN string, targets []Target) error
	DescribeTargetHealth(ctx context.Context, targetGroupARN string) ([]TargetHealth, error)
	SetTargetHealth(ctx context.Context, targetGroupARN string, targetID string, state string) error
}

type ModifyListenerInput struct {
	ListenerARN    string
	Port           int
	Protocol       string
	DefaultActions []RuleAction
}

type RuleAction struct {
	Type           string // "forward"
	TargetGroupARN string
}

type RuleCondition struct {
	Field  string // "path-pattern" or "host-header"
	Values []string
}

type RuleConfig struct {
	ListenerARN string
	Priority    int
	Conditions  []RuleCondition
	Actions     []RuleAction
}

type RuleInfo struct {
	ARN         string
	ListenerARN string
	Priority    int
	Conditions  []RuleCondition
	Actions     []RuleAction
	IsDefault   bool
}

type Target struct {
	ID   string
	Port int
}

type TargetGroupConfig struct {
	Name       string
	Protocol   string
	Port       int
	VPCID      string
	HealthPath string
	Tags       map[string]string
}

type TargetGroupInfo struct {
	ID         string
	ARN        string
	Name       string
	Protocol   string
	Port       int
	VPCID      string
	HealthPath string
	Tags       map[string]string
}

type TargetHealth struct {
	Target Target
	State  string // "healthy", "unhealthy", "draining", "initial"
	Reason string
}