package server

import (
	"context"
	"log/slog"
	"time"
)

const defaultReminderPollInterval = 15 * time.Minute

func (s *Server) startNotificationReminderLoop() {
	if s == nil || s.notifySvc == nil || !s.notifySvc.Available() {
		return
	}
	s.reminderStop = make(chan struct{})
	go func() {
		ticker := time.NewTicker(defaultReminderPollInterval)
		defer ticker.Stop()
		s.runStageAdvanceReminders(context.Background())
		for {
			select {
			case <-s.reminderStop:
				return
			case <-ticker.C:
				s.runStageAdvanceReminders(context.Background())
			}
		}
	}()
}

func (s *Server) runStageAdvanceReminders(ctx context.Context) {
	if s.notifySvc == nil || !s.notifySvc.Available() {
		return
	}
	n, err := s.notifySvc.ProcessStageAdvanceReminders(ctx)
	if err != nil {
		slog.Warn("stage advance reminder scan failed", "error", err)
		return
	}
	if n > 0 {
		slog.Info("stage advance 24h reminders sent", "count", n)
	}
}