package sessionmetrics

import (
	"github.com/prometheus/client_golang/prometheus"
	"github.com/prometheus/client_golang/prometheus/promauto"
)

type Operation string

const (
	Validation    Operation = "validation"
	CurrentLogout Operation = "current_logout"
	AllLogout     Operation = "all_logout"
)

type Outcome string

const (
	Active          Outcome = "active"
	Succeeded       Outcome = "succeeded"
	AlreadyInactive Outcome = "already_inactive"
	MissingIdentity Outcome = "missing_identity"
	StorageError    Outcome = "storage_error"
)

var lifecycle = promauto.NewCounterVec(prometheus.CounterOpts{
	Namespace: "sendico",
	Subsystem: "auth",
	Name:      "session_lifecycle_total",
	Help:      "Session validation and logout outcomes.",
}, []string{"operation", "outcome"})

func Observe(operation Operation, outcome Outcome) {
	lifecycle.WithLabelValues(string(operation), string(outcome)).Inc()
}