package job

import (
	"context"
	"log"
	"time"

	domusecase "haixun-backend/internal/model/job/domain/usecase"
)

type Reaper struct {
	jobs domusecase.UseCase
}

func NewReaper(jobs domusecase.UseCase) *Reaper {
	return &Reaper{jobs: jobs}
}

func (r *Reaper) Start(ctx context.Context, interval time.Duration) {
	if interval <= 0 {
		interval = 30 * time.Second
	}
	log.Printf("job reaper started: interval=%s", interval)
	ticker := time.NewTicker(interval)
	defer ticker.Stop()

	for {
		select {
		case <-ctx.Done():
			log.Printf("job reaper stopped")
			return
		case <-ticker.C:
			result, err := r.jobs.RunMaintenance(ctx)
			if err != nil {
				log.Printf("job reaper error: %v", err)
				continue
			}
			if result.EnqueuedPending > 0 || result.ReapedCancelGrace > 0 || result.ReapedExpiredLocks > 0 {
				log.Printf("job reaper: enqueued=%d cancel_grace=%d expired=%d",
					result.EnqueuedPending, result.ReapedCancelGrace, result.ReapedExpiredLocks)
			}
		}
	}
}