/*
 Copyright 2023 The Volcano Authors.

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at

     http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
*/

package features

import (
	"k8s.io/apimachinery/pkg/util/runtime"
	utilfeature "k8s.io/apiserver/pkg/util/feature"
	"k8s.io/component-base/featuregate"
)

const (
	// WorkLoadSupport can cache and operate **K8s native resource**, Deployment/Replicas/ReplicationController/StatefulSet resources currently.
	WorkLoadSupport featuregate.Feature = "WorkLoadSupport"

	// VolcanoJobSupport can identify and schedule volcano job.
	VolcanoJobSupport featuregate.Feature = "VolcanoJobSupport"

	// PodDisruptionBudgetsSupport can cache and support PodDisruptionBudgets
	PodDisruptionBudgetsSupport featuregate.Feature = "PodDisruptionBudgetsSupport"

	// QueueCommandSync supports queue command sync.
	QueueCommandSync featuregate.Feature = "QueueCommandSync"

	// PriorityClass to provide the capacity of preemption at pod group level.
	PriorityClass featuregate.Feature = "PriorityClass"

	// CSIStorage is a legacy Volcano feature gate name. Scheduler cache registration of
	// CSIDriver / CSIStorageCapacity informers is controlled by --csi-storage only.
	CSIStorage featuregate.Feature = "CSIStorage"

	// ResourceTopology supports resources like cpu/memory topology aware.
	ResourceTopology featuregate.Feature = "ResourceTopology"

	// CronVolcanoJobSupport can identify and schedule volcano cronjob.
	CronVolcanoJobSupport featuregate.Feature = "CronVolcanoJobSupport"

	// SchedulingGatesQueueAdmission uses Kubernetes schedulingGates to delay
	// setting the Unschedulable condition on pods until the queue has enough
	// capacity, preventing cluster autoscalers from triggering unnecessary
	// scale-ups for pods that are simply waiting for queue admission.
	SchedulingGatesQueueAdmission featuregate.Feature = "SchedulingGatesQueueAdmission"
)

func init() {
	runtime.Must(utilfeature.DefaultMutableFeatureGate.Add(defaultVolcanoFeatureGates))
}

var defaultVolcanoFeatureGates = map[featuregate.Feature]featuregate.FeatureSpec{
	WorkLoadSupport:             {Default: true, PreRelease: featuregate.Alpha},
	VolcanoJobSupport:           {Default: true, PreRelease: featuregate.Alpha},
	PodDisruptionBudgetsSupport: {Default: true, PreRelease: featuregate.Alpha},
	QueueCommandSync:            {Default: true, PreRelease: featuregate.Alpha},
	PriorityClass:               {Default: true, PreRelease: featuregate.Alpha},
	// CSIStorage default is kept for compatibility; cache CSI informers use --csi-storage.
	CSIStorage:                    {Default: false, PreRelease: featuregate.Alpha},
	ResourceTopology:              {Default: true, PreRelease: featuregate.Alpha},
	CronVolcanoJobSupport:         {Default: true, PreRelease: featuregate.Alpha},
	SchedulingGatesQueueAdmission: {Default: false, PreRelease: featuregate.Alpha},
}
