/*
Copyright 2019 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 kubernetes

import (
	"k8s.io/client-go/informers"
	clientset "k8s.io/client-go/kubernetes"
	"k8s.io/client-go/tools/cache"
)

const (
	// Default QPS for clients to the API server
	defaultClientQPS = float32(100)
	// Max QPS for client to the API server
	maxClientQPS = float32(1000)
	// Min QPS for client to the API server
	minClientQPS = float32(5)
	// Default Burst for client to the API server
	defaultClientBurst = 100
	// Max Burst for client to the API server
	maxClientBurst = 1000
	// Min Burst for client to the API server
	minClientBurst = 5
	// Kind for virtualmachine resources
	virtualMachineKind = "virtualmachines"
	// Kind for cnsfileaccessconfig resources
	cnsfileaccessconfigKind = "cnsfileaccessconfigs"
)

// InformerManager is a service that notifies subscribers about changes
// to well-defined information in the Kubernetes API server.
type InformerManager struct {
	// k8s client
	client clientset.Interface
	// main shared informer factory
	informerFactory informers.SharedInformerFactory
	// main signal
	stopCh (<-chan struct{})

	// node informer
	nodeInformer cache.SharedInformer

	// ConfigMap informer
	configMapInformer cache.SharedInformer
	// Function to determine if configMapInformer has been synced
	configMapSynced cache.InformerSynced

	// PV informer
	pvInformer cache.SharedInformer
	// Function to determine if pvInformer has been synced
	pvSynced cache.InformerSynced

	// PVC informer
	pvcInformer cache.SharedInformer
	// Function to determine if pvcInformer has been synced
	pvcSynced cache.InformerSynced

	// namespaceInformer informer
	namespaceInformer cache.SharedInformer
	// Function to determine if namespaceInformer has been synced
	namespaceSynced cache.InformerSynced

	// Pod informer
	podInformer cache.SharedInformer
	// Function to determine if podInformer has been synced
	podSynced cache.InformerSynced
}
