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 
{
    public String description;
    private HashMap<String,Room> rooms = new HashMap<>();
    private HashMap<String,Food> foods = new HashMap<>();
    public Evil evil;
    public Extra extra;
    
    //private HashMap<String,Food> foods = new HashMap<>();
    //up down east south north west
    // public Room northExit;
    // public Room southExit;
    // public Room eastExit;
    // public Room westExit;

    /**
     * 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 boolean check() {
        return !foods.isEmpty();
    }
    public void putFood(Food food) 
    {
        if(foods.get(food.getName())==null){
            this.foods.put(food.getName(),food);
        }
    }
    public void setEvil(Evil evil)
    {
        this.evil = evil;
    }
    
    public Evil getEvil() {
        return evil;
    }

    public void removeEvil(Evil evil){        
        this.evil = null;
    }
    public void setExtra(Extra extra)
    {
        this.extra = extra;
    }
    public void checkExtra() {
        if(extra != null){
            System.out.println("这个房间有周边。");
            this.extra = extra;
        }
    }
    public void removeExtra(Extra extra){        
        this.extra = null;
    }
    public Extra getExtra() {
        return extra;
    }
    public void checkEvil() {
        if(evil != null){
            System.out.println("这个房间有黑粉！");
            this.evil = evil;
        }
    }
    public Food getFood(String name) {
        return foods.get(name);
    }
    public void removeFood(String name) {
        Food f = foods.remove(name);
        if(f == null){
            System.out.println("没有此食物" +name);
        }
    }
    public void checkFood() {
        if(!foods.isEmpty()){
            System.out.print("这个房间有食物：");
            for(String name : foods.keySet()){
                System.out.print(name + " ");
            }
            System.out.println();
        }
        else{
            System.out.println("这个房间没有食物。");
        }
    }
    /**
     * 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 setExit(String direction, Room room){
        this.rooms.put(direction,room);
    }
    public void printExits() {
        System.out.println("你可以选择走向: ");
        for( String str : rooms.keySet()){
            System.out.print(str + " ");
        }
        System.out.println();
    }
    public Room goNext(String direction) {
        return this.rooms.get(direction);
    } 
    /**
     * @return The description of the room.
     */
    public String getDescription()
    {
        return description;
    }

}