public class Game 
{
    private Parser parser;
    private Room currentRoom;
        
    public Game() 
    {
        createRooms();
        parser = new Parser();
    }

    private void createRooms()
    {
        Room outside, theatre, pub, lab, office;
      
        // create the rooms
        outside = new Room("outside the main entrance of the university");
        theatre = new Room("in a lecture theatre");
        pub = new Room("in the campus pub");
        lab = new Room("in a computing lab");
        office = new Room("in the computing admin office");
        
        // initialise room exits
        outside.setExit("east", theatre);
        outside.setExit("south", lab);
        outside.setExit("west", pub);

        theatre.setExit("west", outside);

        pub.setExit("east", outside);

        lab.setExit("north", outside);
        lab.setExit("east", office);

        office.setExit("west", lab);

        currentRoom = outside;  // start game outside
    }

    public void play() 
    {            
        printWelcome();

        // Enter the main command loop.  Here we repeatedly read commands and
        // execute them until the game is over.
                
        boolean finished = false;
        while (! finished) {
            Command command = parser.getCommand();
            finished = processCommand(command);
        }
        System.out.println("Thank you for playing.  Good bye.");
    }

    private void printWelcome()
    {
        System.out.println();
        System.out.println("Welcome to the World of Zuul!");
        System.out.println("World of Zuul is a new, incredibly boring adventure game.");
        System.out.println("Type 'help' if you need help.");
        System.out.println();
        System.out.println(currentRoom.getLongDescription());
    }

    public boolean processCommand(Command command) 
    {
        boolean wantToQuit = false;

        if(command.isUnknown()) {
            System.out.println("I don't know what you mean...");
            return false;
        }

        String commandWord = command.getCommandWord();
        if (commandWord.equals("help")) {
            printHelp();
        }
        else if (commandWord.equals("go")) {
            goRoom(command);
        }
        else if (commandWord.equals("quit")) {
            wantToQuit = quit(command);
        }
        // else command not recognised.
        return wantToQuit;
    }

    private void printHelp() 
    {
        System.out.println("You are lost. You are alone. You wander");
        System.out.println("around at the university.");
        System.out.println();
        System.out.println("Your command words are:");
        parser.showCommands();
    }

    private void goRoom(Command command) 
    {
        if(!command.hasSecondWord()) {
            // if there is no second word, we don't know where to go...
            System.out.println("Go where?");
            return;
        }

        String direction = command.getSecondWord(); 

        // Try to leave current room.
        Room nextRoom = currentRoom.getExit(direction);

        if (nextRoom == null) {
            System.out.println("There is no door!");
        }
        else {
            currentRoom = nextRoom;
            System.out.println(currentRoom.getLongDescription());
        }
    }

    private boolean quit(Command command) 
    {
        if(command.hasSecondWord()) {
            System.out.println("Quit what?");
            return false;
        }
        else {
            return true;  // signal that we want to quit
        }
    }
}

public class Player 
{
    private Room currentRoom;
        
    public Game() 
    {
        createRooms();
    }

    private void createRooms()
    {
        Room outside, theatre, pub, lab, office;
      
        // create the rooms
        outside = new Room("outside the main entrance of the university");
        theatre = new Room("in a lecture theatre");
        pub = new Room("in the campus pub");
        lab = new Room("in a computing lab");
        office = new Room("in the computing admin office");
        
        // initialise room exits
        outside.setExit("east", theatre);
        outside.setExit("south", lab);
        outside.setExit("west", pub);

        theatre.setExit("west", outside);

        pub.setExit("east", outside);

        lab.setExit("north", outside);
        lab.setExit("east", office);

        office.setExit("west", lab);

        currentRoom = outside;  // start game outside
    }

    public void move(String direction) 
    {
        // Try to leave current room.
        Room nextRoom = currentRoom.getExit(direction);

        if (nextRoom == null) {
            System.out.println("There is no door!");
        }
        else {
            currentRoom = nextRoom;
            System.out.println(currentRoom.getLongDescription());
        }
    }
}