package handlers

import (
	"log/slog"
	"strconv"
	"strings"
	"time"
)

func StartDailyCleanup(app *App) {
	loc, _ := time.LoadLocation("Europe/Budapest")

	go func() {
		for {
			// read finalize_time from DB (default "10:30")
			t := app.getSetting("finalize_time", "10:30")

			// parse "HH:MM"
			parts := strings.Split(t, ":")
			hour, _ := strconv.Atoi(parts[0])
			minute, _ := strconv.Atoi(parts[1])

			now := time.Now().In(loc)
			next := time.Date(now.Year(), now.Month(), now.Day(), hour, minute, 0, 0, loc)
			if !next.After(now) {
				next = next.Add(24 * time.Hour)
			}

			slog.Info("Next finalize scheduled", "time", next)

			timer := time.NewTimer(time.Until(next))

			select {
			case <-timer.C:
				if err := finalizeOrders(app); err != nil {
					slog.Error("Daily finalize failed", "error", err)
				} else {
					slog.Info("Orders finalized", "time", time.Now().In(loc))
				}
			case <-app.FinalizeUpdate:
				slog.Info("Finalize time updated, recalculating...")
				timer.Stop()
			}
		}
	}()
}