import java.util.Arrays;
public class Bsp08 {

    public static void main(String[] args) {

        Train t1 = new Train ("ICE1", "Salzburg", "Linz", new int[] {20, 30, 50, 36, 42});
        Train t2 = new Train ("RJ0", "Linz", "Wien", new int[] {50, 30, 10});
        Train[] trains = {
          t1,
          t2,
          new Train ("NJ1", "Klagenfurt", "Wien", new int[] {60, 60, 20}),
        };

        //Direktverbindung
        Train[] route1 = oneStopTrip(trains, "Linz", "Wien");
        for (Train tr: route1)
            System.out.println (tr);
        // RJ0: From Linz, To Wien, Total seats: 90, Reserved seats: 0

        //Umstieg
        Train[] route2 = oneStopTrip(trains, "Salzburg", "Wien");
        for (Train tr: route2)
            System.out.println (tr);
        // ICE1: From Salzburg, To Linz, Total seats: 178, Reserved seats: 0
        // RJ0: From Linz, To Wien, Total seats: 90, Reserved seats: 0


        //keine zuge vorhanden; gibt leeres Array zuruck {Exception fix}
        Train[] trains2 = {};
        Train[] route3 = oneStopTrip(trains2, "Salzburg", "Wien");
        for (Train tr: route3)
            System.out.println (tr);


    }

    public static Train[] oneStopTrip (Train[] trains, String fromPlace, String toPlace) {
        Train[] reTrains = new Train[2];
        Train[] direktVerbin = new Train[1];

        //Check Parameters
        if(trains == null || fromPlace==null || toPlace==null){
            return reTrains;
        }

        //suche nach Direktverbindung
        for(int i = 0; i < trains.length; i++){
            if(trains[i].getDeparture().equals(fromPlace) && trains[i].getDestination().equals(toPlace)){
                direktVerbin[0] = trains[i];
                return direktVerbin;
            }
        }

        //suche nach Verbidnung mit nur einen Zwischenumstieg
        for(int i = 0; i < trains.length; i++) {
            //Suche zug der am gesuchten Ort losfährt
            if(trains[i].getDeparture().equals(fromPlace)) {
                //Suche Anschlusszug
                for(int j = 0; j < trains.length; j++){
                    if(trains[i].getDestination().equals(trains[j].getDeparture()) && trains[j].getDestination().equals(toPlace)){
                        reTrains[0] = trains[i];
                        reTrains[1] = trains[j];
                        break;
                    }
                }
            }
        }
        return reTrains;
    }

}