package rep

import (
	"log"
	"time"
)

func (rep *Replicator) runWALGC() {
	defer rep.done.Done()

	ticker := time.NewTicker(time.Minute)
	defer ticker.Stop()

	for {
		select {
		case <-ticker.C:
			state := rep.getState()
			before := time.Now().Unix() - rep.conf.WALSegMaxAgeSec
			if err := rep.wal.DeleteBefore(before, state.SeqNum); err != nil {
				log.Printf("[WAL-GC] failed to delete wal segments: %v", err)
			}
		// OK
		case <-rep.stop:
			log.Print("[WAL-GC] Stopped")
			return
		}
	}
}