package businessLogic;

import java.util.Date;
import java.util.Vector;

import com.db4o.ObjectContainer;
import com.db4o.ObjectSet;

import dataAccess.DB4oManager;
import domain.Booking;
import domain.Offer;
import domain.Owner;
import domain.RuralHouse;
import exceptions.OfferCanNotBeBooked;

public final class BookingManager {

	private int bookingNumber = 0;
	dataAccess.DB4oManager dbMngr;

	private static BookingManager theBookingManager;

	public BookingManager() {
		try {
			this.dbMngr = DB4oManager.getInstance();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * This method returns the next Booking number
	 * 
	 * @return the book number
	 */
	public static int getNumber() {
		ObjectContainer db = DB4oManager.getContainer();
		BookingManager b = getInstance();
		b.bookingNumber++;
		db.store(b);
		db.commit();
		return b.bookingNumber;
	}

	/**
	 * This method returns the instance of the BookingManager class
	 * 
	 * @return the booking manager
	 */
	public static BookingManager getInstance() {
		ObjectContainer db = DB4oManager.getContainer();
		BookingManager b = new BookingManager();
		ObjectSet<BookingManager> result = db.queryByExample(b);
		if (!result.hasNext()) {
			theBookingManager = new BookingManager();
			db.store(theBookingManager);
			db.commit();
		} else
			theBookingManager = (BookingManager) result.next();
		return theBookingManager;
	}

	public void removeBooking(Booking B) {
		// TODO

	}


	/**
	 * This method creates a book with a corresponding parameters
	 * 
	 * @param First
	 *            day, last day, house number and telephone
	 * @return a book
	 */
	public Booking createBooking(RuralHouse ruralHouse, Date firstDate,
			Date lastDate, String bookTelephoneNumber)
			throws OfferCanNotBeBooked {

		return dbMngr.createBooking(ruralHouse, firstDate, lastDate,
				bookTelephoneNumber);
	}

}