import java.io.*;
import java.util.StringTokenizer;  // maybe to break down the input.
/**
 *
 *    MastermindTester.java
 *
 *    Implements a tester in the Mastermind game.
 *
 
 javadoc format
 
 *    @version      1.0   Feb 15, 1997
 *    @author       Kwok-Bun Yue
 *    @see          http://ricis.cl.uh.edu/~yue/s97/4931/index.html
 *
 **/

class MastermindTester {

    // constants
    final static int NUM_SLOTS   = 4;
    final static int NUM_COLORS  = 6;
    final static int MAX_GUESSES = 30;

	// Create an input stream for the standard input.
    static DataInputStream dis = new DataInputStream(System.in);

	// main program body.
	
    public static void main(String[] args) throws IOException {

		// Create a new Mastermind game.
        Mastermind mastermind = new Mastermind(NUM_SLOTS,
                                               NUM_COLORS,
                                               MAX_GUESSES);;

        int[] guess;	// current guess made
        int[] hints = new int[2];
		//  hints of the guess: hints[0]: # of ox. hints[1]: # of cows.

        while (true) {
            //  play one game: one game per iteration of the while loop.

            System.out.println("\nWelcome to a new mastermind game.\n");
            while (true) {
			    //   get one guess from the player.
                guess = getPlayerGuess(NUM_SLOTS, NUM_COLORS);
                mastermind.makeGuess(guess, hints);

                System.out.println("Current guess and hint history:\n\n");
                mastermind.printHistory();

                if (mastermind.gameWon()) {
                    System.out.println("Congratulation! You won! \n\n");
                    break;
                }
                else if (mastermind.gameOver()) {
                    System.out.println("Sorry! Maximum number of guesses reached!");
                    break;
                }
            }
            if (! moreGame()) break;
            mastermind.newGame();
			
			// The class Mastermind must provide a constructor, makeGuess,
			//  printHistory, gameWon, gameOver and newGame.
        }
    }

	// helper methods.
    static int[] getPlayerGuess(int numSlots, int numColors)
            throws IOException {
        int[] result = new int[numSlots];
        String inLine;
        StringTokenizer st;
        System.out.println("Please supply the colors of each slot of your guess:\n");
        for (int i=0; i < numSlots; i++) {
			// get the guess for one slot.
            System.out.print("The (integer) color of slot " + (i+1));
            System.out.print(" [1 to " + numColors + "]: ");
            System.out.flush();
			//get the string input, convert to an integer and store in the
			// current result element.
            st = new StringTokenizer(dis.readLine());
            result[i] = Integer.parseInt(st.nextToken());
        }
        System.out.println();
        return result;
    }

    static boolean moreGame() throws IOException {
        while (true) {
           System.out.println("Do you want to play another game? [y/n]");
           String inLine = dis.readLine();
           if (inLine.charAt(0) == 'y' || inLine.charAt(0) == 'Y')
               return true;
           if (inLine.charAt(0) == 'n' || inLine.charAt(0) == 'N')
               return false;
        }
    }

}