/**
 * This class is part of the "World of Zuul" application. 
 * "World of Zuul" is a very simple, text based adventure game.  
 * 
 * This class holds an enumeration of all command words known to the game.
 * It is used to recognise commands as they are typed in.
 *
 * @author  Michael Kölling and David J. Barnes
 * @version 2016.02.29
 */

public class CommandWords
{
    // a constant array that holds all valid command words


    /**
     * Constructor - initialise the command words.S
     */
    public CommandWords()
    {
        // nothing to do at the moment...
    }
    
    public static String getAllWords(String aString){
        CommandWord[] validCommands = CommandWord.values();
        String result=" ";
        for(int i=0;i<validCommands.length;i++){
                result += validCommands[i].isSameWord(aString)+ " ";        
        }
        return result;
    }
    
    /**
     * Check whether a given String is a valid command word. 
     * @return true if a given string is a valid command,
     * false if it isn't.
     */
    public boolean isCommand(String aString)
    {
        CommandWord[] validCommands = CommandWord.values();
        for(int i = 0; i < validCommands.length; i++) {
            if(validCommands[i].isSameWord(aString))
                return true;
        }
        // if we get here, the string was not found in the commands
        return false;
    }
    
    public static String allCommandWords(){
        CommandWord[] words = CommandWord.values();
        String result= "";
        for(CommandWord w: words){
            result += w.getCommandWord() + " ";
        }
        return result;
    }
}