/*
Copyright 2018 The Kubernetes 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 options

import (
	"github.com/spf13/pflag"

	kubectrlmgrconfig "k8s.io/kubernetes/pkg/controller/apis/config"
)

// PodGCControllerOptions holds the PodGCController options.
type PodGCControllerOptions struct {
	*kubectrlmgrconfig.PodGCControllerConfiguration
}

// AddFlags adds flags related to PodGCController for controller manager to the specified FlagSet.
func (o *PodGCControllerOptions) AddFlags(fs *pflag.FlagSet) {
	if o == nil {
		return
	}

	fs.Int32Var(&o.TerminatedPodGCThreshold, "terminated-pod-gc-threshold", o.TerminatedPodGCThreshold, "Number of terminated pods that can exist before the terminated pod garbage collector starts deleting terminated pods. If <= 0, the terminated pod garbage collector is disabled.")
}

// ApplyTo fills up PodGCController config with options.
func (o *PodGCControllerOptions) ApplyTo(cfg *kubectrlmgrconfig.PodGCControllerConfiguration) error {
	if o == nil {
		return nil
	}

	cfg.TerminatedPodGCThreshold = o.TerminatedPodGCThreshold

	return nil
}

// Validate checks validation of PodGCControllerOptions.
func (o *PodGCControllerOptions) Validate() []error {
	if o == nil {
		return nil
	}

	errs := []error{}
	return errs
}