package pl.sudra.service;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import pl.sudra.domain.Bill;
import pl.sudra.domain.Reservation;
import pl.sudra.repository.BillRepository;
import pl.sudra.repository.ReservationRepository;

import java.sql.Date;
import java.text.SimpleDateFormat;
import java.time.LocalDate;
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;
import java.time.temporal.ChronoUnit;
import java.util.List;
import java.util.Objects;

@Service("reservationService")
@Transactional
public class ReservationServiceImpl implements ReservationService {
    private final ReservationRepository reservationRepository;
    private final BillRepository billRepository;

    @Autowired
    public ReservationServiceImpl(ReservationRepository reservationRepository, BillRepository billRepository) {
        this.reservationRepository = reservationRepository;
        this.billRepository = billRepository;
    }

    @Override
    public void addReservation(Reservation reservation) {
        this.reservationRepository.save(reservation);
    }

    @Override
    public void editReservation(Reservation reservation) {
        this.reservationRepository.save(reservation);
    }

    @Override
    public List<Reservation> getReservations() {
        return this.reservationRepository.findAll();
    }

    @Override
    public void removeReservation(long id) {
        this.reservationRepository.deleteById(id);
    }

    @Override
    public Reservation getReservation(long id) {
        return this.reservationRepository.findReservationById(id);
    }

    @Override
    public void generateReservations(int n) {

    }

//    @Override
//    public void generateReservations(int n) {
////        Date today = new Date();
//        LocalDate today = LocalDate.now();
//        System.out.println("n: " + n);
//
//        Random random = new Random();
//
//        Calendar calendar = Calendar.getInstance();
//
//        for (int i = 0; i < n; i++) {
//            byte start_hour = (byte) (random.nextInt(23 - 7) + 7);
//            byte end_hour = (byte) (random.nextInt(24 - start_hour + 1) + start_hour + 1);
//
////            calendar.setTime(today);
////            calendar.add(Calendar.DAY_OF_YEAR, -1 + i);
////            System.out.println(calendar.getTime());
//
////            this.reservationRepository.save(
////                    new Reservation(
////                            (long) i,
////                            (long) (i % 2),
////                            (java.sql.Date) Date.valueOf(today.plusDays(-1 + i)),
////                            start_hour, end_hour
////                    ).setDate;
////            );
//        }
//    }

    @Override
    @Transactional
    public List<Reservation> findReservations(long boat_id, Date date) {
        return this.reservationRepository.findReservationsByBoatIdAndDate(boat_id, date);
    }

    @Override
    public Reservation findById(long id) {
        return this.reservationRepository.findById(id).get();
    }

    @Override
    public List<Reservation> findReservationsByUserId(Long user_id) {
        return this.reservationRepository.findReservationsByUserId(user_id);
    }

    // every hour at 0 minutes
//    @Scheduled(cron = "0 0 * * * *")
    @Scheduled(cron = "0 * * * * *")
    public void updateBill() {
        java.util.Date currentDate = new java.util.Date();
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
        String formattedDate = dateFormat.format(currentDate);
        LocalTime date_now = LocalTime.now();
        int hour_now = date_now.getHour();
//        System.out.println("Updating reservation's Bill: ");
//        System.out.println("Date: " + formattedDate);
//        System.out.println("Hour: " + hour_now);
        List<Reservation> reservations = reservationRepository.findAll();
        reservations.forEach(reservation -> {
//            System.out.println("Hour: " + hour_now);
//            System.out.println("Start: " + reservation.getStartHour());
//            System.out.println("End: " + reservation.getEndHour());
//            System.out.println("Date: " + reservation.getDate().toString());
//            System.out.println("Status: " + reservation.getBill().getStatus());

            if (formattedDate.equals(reservation.getDate().toString()) &&
                    hour_now == reservation.getStartHour() &&
                    Objects.equals(reservation.getBill().getStatus(), "Confirmed")) {
                System.out.println("Conf -> Act");
                reservation.getBill().setStatus("Active");
                reservationRepository.saveAndFlush(reservation);
            } else if (hour_now == reservation.getEndHour() &&
                    Objects.equals(reservation.getBill().getStatus(), "Active")) {
                System.out.println("Act -> Comp");
                reservation.getBill().setStatus("Completed");
                reservationRepository.saveAndFlush(reservation);
            }

//            LocalDate date1 = LocalDate.parse(bill.getIssueDate().toString());
//            LocalDate date2 = LocalDate.parse(LocalDate.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd")).toString());
//
//            System.out.println(date1.toString() + ">" + date2.toString());
//
//            if (ChronoUnit.DAYS.between(
//                    LocalDate.parse(bill.getIssueDate().toString()),
//                    LocalDate.parse(LocalDate.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd")).toString())) > 30
//                    && date1.isBefore(date2)) {
//                bill.setStatus("CANCELLED");
//                billRepository.saveAndFlush(bill);
//                System.out.println(bill.getId());
//            }
        });
    }
}