package businessLogic;

import java.rmi.RemoteException;
import java.rmi.server.UnicastRemoteObject;
import java.util.Date;
import java.util.Vector;

import javax.mail.MessagingException;

import com.db4o.ObjectContainer;
import com.db4o.ObjectSet;
import common.BookingInterface;

import dataAccess.DB4oManager;
import domain.Booking;
import domain.Client;
import domain.RuralHouse;
import exceptions.OfferCanNotBeBooked;



public final class BookingManager extends UnicastRemoteObject implements BookingInterface {

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	private int bookingNumber = 0;
	dataAccess.DB4oManager dbMngr;

	private static BookingManager theBookingManager;

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

	/**
	 * This method returns the next Booking number
	 * 
	 * @return the book number
	 */

    public int getNumber() throws RemoteException{
		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
	 * @throws RemoteException 
	 */

	public BookingManager getInstance() throws RemoteException  {
		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 denyBooking(Booking b) throws RemoteException{
				this.dbMngr.removeBooking(b);
				try {
					MailManager.getInstance().Send(b.getClient().getMailAccount(), "Your booking has not been accepted","We are sorry");
				} catch (MessagingException e) {
					e.printStackTrace();
				}
	}


	public void acceptBooking(Booking b) throws RemoteException{
		b.getOffer().setBooked(true);
		b.getOffer().getBookings().clear();
		b.getOffer().getBookings().add(b);
		this.dbMngr.acceptBooking(b.getOffer());
		try {
			MailManager.getInstance().Send(b.getClient().getMailAccount(), "Your booking has been accepted","Here should be the bill");
		} catch (MessagingException e) {
			e.printStackTrace();
		}
		
	}
	/**
	 * This method creates a book with a corresponding parameters
	 * 
	 * @param First
	 *            day, last day, house number and telephone
	 * @return a book
	 */
	public Vector<Booking> createBooking(RuralHouse ruralHouse, Date firstDate,
			Date lastDate, Client client)
			throws OfferCanNotBeBooked,RemoteException {

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

}