/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package flight;

import client.FlightServiceCallback;
import common.Constants;
import common.CreditCard;
import common.InvalidCreditCardException;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.osoa.sca.annotations.Callback;
import org.osoa.sca.annotations.Property;
import org.osoa.sca.annotations.Scope;
import org.osoa.sca.annotations.Service;

@Service(FlightService.class)
@Scope("COMPOSITE")
public class FlightServiceImpl implements FlightService {

    @Callback
    protected FlightServiceCallback callback;
    private FlightBD bd;
    private int sleepBookTime;
    private int sleepPaymentTime;
    private String behavior;

    public FlightServiceImpl() {
        bd = FlightBD.getInstance();
        sleepBookTime = 0;
        sleepPaymentTime = 0;
        behavior = Constants.NORMAL;
    }

    public void book(int flightNumber) {
        new Thread(new BookThread(flightNumber)).start();
    }

    public void pay(int flightNumber, int ticketNumber, CreditCard creditCard) {
        new Thread(new PayThread(flightNumber, ticketNumber, creditCard)).start();
    }

    public String getBehavior() {
        return behavior;
    }

    @Property(name = "behavior", required = false)
    public void setBehavior(String behavior) {
        this.behavior = behavior.toUpperCase();
    }

    public int getSleepBookTime() {
        return sleepBookTime;
    }

    @Property(name = "sleepBookTime", required = false)
    public void setSleepBookTime(int sleepBookTime) {
        this.sleepBookTime = sleepBookTime;
    }

    public int getSleepPaymentTime() {
        return sleepPaymentTime;
    }

    @Property(name = "sleepPaymentTime", required = false)
    public void setSleepPaymentTime(int sleepPaymentTime) {
        this.sleepPaymentTime = sleepPaymentTime;
    }

    private class BookThread implements Runnable {

        private int flightNumber;

        BookThread(int flightNumber) {
            this.flightNumber = flightNumber;
        }

        public void run() {
            //Extra time to book
            try {
                Thread.sleep(sleepBookTime);
            } catch (InterruptedException ex) {
                Logger.getLogger(FlightServiceImpl.class.getName()).log(Level.SEVERE, null, ex);
            }

            //NORMAL behavior
            if (behavior.equals(Constants.NORMAL) || behavior.equals(Constants.EXCEPTIONAL_PAYMENT)) {

                Flight flight = bd.get(flightNumber);
                int ticketNumber = flight.addTicket();

                if (ticketNumber == -1) {
                    callback.throwsFlightException(new UnavailableFlightException());
                    return;
                }
                callback.confirmFlightBook(ticketNumber);
            } 
            
            //EXCEPTIONAL_BOOK behavior
            else if (behavior.equals(Constants.EXCEPTIONAL_BOOK)) {
                callback.throwsFlightException(new UnavailableFlightException());
            }
        }
    }

    private class PayThread implements Runnable {

        private int flightNumber;
        private int ticketNumber;
        private CreditCard creditCard;

        public PayThread(int flightNumber, int ticketNumber, CreditCard creditCard) {
            this.flightNumber = flightNumber;
            this.ticketNumber = ticketNumber;
            this.creditCard = creditCard;
        }

        public void run() {
            //Extra time to pay
            try {
                Thread.sleep(sleepPaymentTime);
            } catch (InterruptedException ex) {
                Logger.getLogger(FlightServiceImpl.class.getName()).log(Level.SEVERE, null, ex);
            }

            //NORMAL behavior
            if (behavior.equals(Constants.NORMAL)) {
                
                if (!verifyCreditCard(creditCard)) {
                    Flight flight = bd.get(flightNumber);
                    flight.removeTicket(ticketNumber);

                    callback.throwsFlightException(new InvalidCreditCardException());
                    return;
                }
                callback.confirmFlightPayment(ticketNumber);
            }
            
            //EXCEPTIONAL_PAYMENT behavior
            else if(behavior.equals(Constants.EXCEPTIONAL_PAYMENT)) {
                callback.throwsFlightException(new InvalidCreditCardException());
            }
        }

        private boolean verifyCreditCard(CreditCard creditCard) {
//            Random r = new Random(creditCard.getVerificationNumber());
//            return r.nextBoolean();
            return true;
        }
    }
}