v1alpha1

type ImpersonateConfig struct {
	TargetServiceAccount string `json:"targetServiceAccount"`

	// +kubebuilder:validation:Optional
	Delegates []string `json:"delegates,omitempty"`
}

type InstanceState string

type ScaleTargetRef struct {
	// +kubebuilder:validation:MinLength=1
	ProjectID *string `json:"projectId"`

	// +kubebuilder:validation:MinLength=1
	InstanceID *string `json:"instanceId"`
}

type ServiceAccountSecretRef struct {
	// +kubebuilder:validation:MinLength=1
	Name *string `json:"name"`

	Namespace *string `json:"namespace,omitempty"`

	// +kubebuilder:validation:MinLength=1
	Key *string `json:"key"`
}

type SpannerAutoscaler struct {
	metav1.TypeMeta   `json:",inline"`
	metav1.ObjectMeta `json:"metadata,omitempty"`

	Spec   SpannerAutoscalerSpec   `json:"spec,omitempty"`
	Status SpannerAutoscalerStatus `json:"status,omitempty"`
}

type SpannerAutoscalerList struct {
	metav1.TypeMeta `json:",inline"`
	metav1.ListMeta `json:"metadata,omitempty"`
	Items           []SpannerAutoscaler `json:"items"`
}

type SpannerAutoscalerSpec struct {
	// target reference for scaling.
	ScaleTargetRef ScaleTargetRef `json:"scaleTargetRef"`

	// +kubebuilder:validation:Optional
	// reference for service account secret.
	// If not specified, use ADC of the controller.
	ServiceAccountSecretRef *ServiceAccountSecretRef `json:"serviceAccountSecretRef"`

	// +kubebuilder:validation:Optional
	ImpersonateConfig *ImpersonateConfig `json:"impersonateConfig,omitempty"`

	// +kubebuilder:validation:Minimum=1
	// +kubebuilder:validation:Optional
	// lower limit for the number of nodes that can be set by the autoscaler.
	MinNodes *int32 `json:"minNodes,omitempty"`

	// +kubebuilder:validation:Minimum=1
	// +kubebuilder:validation:Optional
	// upper limit for the number of nodes that can be set by the autoscaler.
	// It cannot be smaller than MinNodes.
	MaxNodes *int32 `json:"maxNodes,omitempty"`

	// +kubebuilder:validation:Minimum=100
	// +kubebuilder:validation:MultipleOf=100
	// +kubebuilder:validation:Optional
	// lower limit for the number of nodes that can be set by the autoscaler.
	MinProcessingUnits *int32 `json:"minProcessingUnits,omitempty"`

	// +kubebuilder:validation:Minimum=100
	// +kubebuilder:validation:MultipleOf=100
	// +kubebuilder:validation:Optional
	// upper limit for the number of nodes that can be set by the autoscaler.
	// It cannot be smaller than minProcessingUnits.
	MaxProcessingUnits *int32 `json:"maxProcessingUnits,omitempty"`

	// +kubebuilder:validation:Minimum=1
	// +kubebuilder:validation:Optional
	// upper limit for the number of nodes when autoscaler scaledown.
	MaxScaleDownNodes *int32 `json:"maxScaleDownNodes"`

	// target average CPU utilization for Spanner.
	TargetCPUUtilization TargetCPUUtilization `json:"targetCPUUtilization"`
}

type SpannerAutoscalerStatus struct {
	// last time the SpannerAutoscaler scaled the number of Spanner nodes.
	// used by the autoscaler to control how often the number of nodes is changed.
	LastScaleTime *metav1.Time `json:"lastScaleTime,omitempty"`

	// last time the SpannerAutoscaler synced the Spanner status.
	LastSyncTime *metav1.Time `json:"lastSyncTime,omitempty"`

	// current number of nodes of Spanner managed by this autoscaler.
	CurrentNodes *int32 `json:"currentNodes,omitempty"`

	// current number of nodes of Spanner managed by this autoscaler.
	CurrentProcessingUnits *int32 `json:"currentProcessingUnits,omitempty"`

	// desired number of nodes of Spanner managed by this autoscaler.
	DesiredNodes *int32 `json:"desiredNodes,omitempty"`

	// desired number of nodes of Spanner managed by this autoscaler.
	DesiredProcessingUnits *int32 `json:"desiredProcessingUnits,omitempty"`

	// +kubebuilder:validation:Type=string
	InstanceState InstanceState `json:"instanceState"`

	// current average CPU utilization for high priority task, represented as a percentage.
	CurrentHighPriorityCPUUtilization *int32 `json:"currentHighPriorityCPUUtilization,omitempty"`
}

type TargetCPUUtilization struct {
	// +kubebuilder:validation:Minimum=0
	// +kubebuilder:validation:Maximum=100
	// fraction of the requested CPU that should be utilized/used,
	// e.g. 70 means that 70% of the requested CPU should be in use.
	HighPriority *int32 `json:"highPriority"`
}