import java.util.*;
/**
 * Class Room - a room in an adventure game.
 *
 * This class is part of the "World of Zuul" application. 
 * "World of Zuul" is a very simple, text based adventure game.  
 *
 * A "Room" represents one location in the scenery of the game.  It is 
 * connected to other rooms via exits.  The exits are labelled north, 
 * east, south, west.  For each direction, the room stores a reference
 * to the neighboring room, or null if there is no exit in that direction.
 * 
 * @author  Michael Kölling and David J. Barnes
 * @version 2016.02.29
 */
public class Room 
{
    private String description;
    private HashMap<String,Room> rooms = new HashMap<>();
    
    private Food food;
    
    /**
     * Create a room described "description". Initially, it has
     * no exits. "description" is something like "a kitchen" or
     * "an open court yard".
     * @param description The room's description.
     */
    public Room(String description) 
    {
        this.description = description;
    }

    public void setFood(Food food){
        this.food = food;
    }
    
    public Food getfood(){
        return food;
    }
    
    public void removeFood(){
        this.food = null;
    }
    /**
     * Define the exits of this room.  Every direction either leads
     * to another room or is null (no exit there).
     * @param north The north exit.
     * @param east The east east.
     * @param south The south exit.
     * @param west The west exit.
     */
    public void setExits(Room north, Room east, Room south, Room west, Room up, Room down) {
        if(north != null) {
            this.rooms.put("north", north);
        }
        if(east != null) {
            this.rooms.put("east", east);
        }
        if(south != null) {
            this.rooms.put("south", south);
        }
        if(west != null) {
            this.rooms.put("west", west);
        }
        if(up != null) {
            this.rooms.put("up", up);
        }
        if(down != null) {
            this.rooms.put("down", down);
        }
    }
    
    public void serExit(String direction,Room room){
        rooms.put(direction, room);
    }
    
    /**
     * @return The description of the room.
     */
    public String getDescription()
    {
        return description;
    }
    
    public void cheakFood(){
        if(food != null){
            System.out.print("这个房间里有食物: ");
            System.out.println(this.food);
        }else{
            System.out.println("这个房间里没有食物。");
        }
    }   
    
    public void printExits(){
        System.out.print("通道: ");
        for (String str : rooms.keySet()){
            System.out.print(str + " ");
        }
        System.out.println();
    }
    public Room goNext(String direction){
        return rooms.get(direction);
    }
}