package outbox

import (
	"context"
	"time"

	"github.com/jackc/pgx/v5/pgxpool"
	"github.com/prometheus/client_golang/prometheus"
)

func RegisterMetrics(pool *pgxpool.Pool) {
	for _, status := range []string{"pending", "processing", "dead"} {
		status := status
		prometheus.MustRegister(prometheus.NewGaugeFunc(prometheus.GaugeOpts{
			Namespace: "voice_platform",
			Subsystem: "outbox",
			Name:      "events",
			Help:      "Current outbox event count by status.",
			ConstLabels: prometheus.Labels{
				"status": status,
			},
		}, func() float64 {
			ctx, cancel := context.WithTimeout(context.Background(), time.Second)
			defer cancel()
			var count float64
			if err := pool.QueryRow(ctx, "SELECT count(*)::float8 FROM outbox_event WHERE status = $1", status).Scan(&count); err != nil {
				return 0
			}
			return count
		}))
	}
}