import java.io.BufferedReader;
import java.io.IOException;
/**
 * Keeps track of the history of the game and well as the clearing
 * the screen and prompting the user to play again
 * 
 * @author Andrew Szatkowski 
 * @version 1.0
 */
public class Mastermind
{
    /**
     * Constructs an instance of the class initializing
     * all instance fields to default values
     * 
     * @param       the total number of turns allowed the player
     */
    public Mastermind(int turns)
    {
        guess = new String[turns];
        resultBlack = new int[turns];
        resultWhite = new int[turns];
    }
    
    /**
     * Clears the terminal window
     */
    public void clearScreen()
    {
        System.out.print('\u000C');
    }
    
    /**
     * Stores the guess history into an array
     * 
     * @param       the current turn the player is on
     *              the guess the player made
     */
    public void setGuessHistory(int location, String input)
    {
        guess[location] = input;
    }
    
    /**
     * Stores the number of blacks each guess scored
     * 
     * @param       the current turn the player is on
     *              the number of blacks scored
     */
    public void setBlackHistory(int location, int black)
    {
        resultBlack[location] = black;
    }
    
    /**
     * Stores the number of whites each guess scored
     * 
     * @param       the current turn the player is on
     *              the number of whites scored
     */
    public void setWhiteHistory(int location, int white)
    {
        resultWhite[location] = white;
    }
    
    /**
     * Prints out the history up to the players turn
     * 
     * @param       the current turn
     */
    public void printHistory(int round)
    {
        for(int i=0; i<round; i++)
        {
            System.out.println("Guess " + (i+1) + ": " + guess[i] + "   Blacks: " + resultBlack[i] + " Whites: " + resultWhite[i]);
        }
    }
    
    /**
     * Resets the history arrays to zero
     */
    public void resetHistory()
    {
        for(int i=0; i<guess.length; i++)
        {
            guess[i] = " ";
            resultBlack[i] = 0;
            resultWhite[i] = 0;
        }
    }
    
    /**
     * Prompts the user to play again
     * 
     * @param       the buffered reader
     * @returns     a true or false value
     * 
     * Pre: the game has run through at least once
     */
    public boolean playAgain(BufferedReader in) throws IOException
    {
        System.out.println("Will you play again? (yes or no)");
        again = in.readLine();
        if (again.equals("yes"))
        {
            return true;
        }
        else
        {
            return false;
        }
    }
    
    // instance fields
    private String again;
    private String [] guess;
    private int [] resultBlack;
    private int [] resultWhite;
}