package com.bayviewglen.zork;

import java.io.File;
import java.util.HashMap;
import java.util.Scanner;

/*
 * Author:  Michael Kolling.
 * Version: 1.0
 * Date:    July 1999
 * 
 * This class holds an enumeration of all command words known to the game.
 * It is used to recognise commands as they are typed in.
 *
 * This class is part of the "Zork" game.
 */
class CommandWords {
	// a constant array that holds all valid command words
	private static HashMap<String, String> m_words = new HashMap<String, String>();;
	/**
	 * Constructor - initialise the command words.
	 */
	public CommandWords() {
		// Import words from words.dat into HashMap
		try {
			Scanner in = new Scanner(new File("data/words.dat"));
			while(in.hasNext()){
				String text = in.nextLine();
				String[] textarr = text.split(",");
				m_words.put(textarr[0], textarr[1].substring(1));
			}
            in.close();
		}catch (Exception e) {
                  e.printStackTrace();
		}	
	}

	/**
	 * Check whether a given String is a valid command word. Return true if it
	 * is, false if it isn't.
	 **/
	// Check if given string is verb or direction
	public static boolean isCommand(String aString) {
		try {
			return (m_words.get(aString).equals("verb") || m_words.get(aString).equals("direction"));
		}catch(Exception e) {
			return false;
		}
	}
	// Check if given string is direction
	public static boolean isDirection(String aString) {
		return m_words.get(aString).equals("direction");
	}

	/*
	 * Print all valid commands to System.out.
	 */
	public void showAll() {
		for (String i : m_words.keySet()) {
			if(m_words.get(i).equals("verb")){
				System.out.print(i + "  ");
			}
		}
		System.out.println();
	}
}