/*
Copyright 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 terminator

import (
	opmetrics "github.com/awslabs/operatorpkg/metrics"
	"github.com/prometheus/client_golang/prometheus"
	crmetrics "sigs.k8s.io/controller-runtime/pkg/metrics"

	"sigs.k8s.io/karpenter/pkg/metrics"
)

const (
	// CodeLabel for eviction request
	CodeLabel = "code"
	// ReasonLabel for pod draining
	ReasonLabel = "reason"
)

var NodesEvictionRequestsTotal = opmetrics.NewPrometheusCounter(
	crmetrics.Registry,
	prometheus.CounterOpts{
		Namespace: metrics.Namespace,
		Subsystem: metrics.NodeSubsystem,
		Name:      "eviction_requests_total",
		Help:      "The total number of eviction requests made by Karpenter",
	},
	[]string{CodeLabel},
)

var PodsDrainedTotal = opmetrics.NewPrometheusCounter(
	crmetrics.Registry,
	prometheus.CounterOpts{
		Namespace: metrics.Namespace,
		Subsystem: metrics.PodSubsystem,
		Name:      "drained_total",
		Help:      "The total number of pods drained during node termination by Karpenter, labeled by reason",
	},
	[]string{ReasonLabel},
)
