/**
 * A class to keep track of generated answer, the guess
 * and to score the guess in comparison to the answer
 * 
 * @author John Paxton augmented by Andrew Szatkowski
 * @version 1.0
 */

public class Row
{
    /**
     * Constructs an instance of the row class and initializes
     * the instance fields
     * 
     * @param       the number of pegs to be used
     */
    Row (int numberPegs)
    {
        guess = new int [ numberPegs ];
        answer = new int [ numberPegs ];
        black = 0;
        white = 0;
    }
    
    /**
     * Copies an array of values into the guess array
     * 
     * @param       the array of guessed values
     * 
     * Pre: a guess has been made and is in array form
     */
    public void recordGuess ( int [] colorsGuessed )
    {
        for (int i = 0; i < guess.length; i++)
        {
            guess[i] = colorsGuessed[i];
        }
    }
    
    /**
     * Copies an array of values into the answer array
     * 
     * @param       the array of the generated answer
     */
    public void recordAnswer ( int [] answer )
    {
        for (int i = 0; i < guess.length; i++ )
        {
            this.answer[i] = answer[i];
        }
    }
    
    /**
     * Scores the guess and determines the number of correct
     * colors in the correct positions, and the number of 
     * correct colors in the wrong positions.
     * 
     * pre: both guess and answer arrays have been filled
     */
    public void scoreGuess()
    {
        // reinitializes the counters to zero
        black = 0;
        white = 0;
        
        /**
         * looks for blacks and then negates the position
         */
        for (int i = 0; i < guess.length; i++)
        {
            if (guess[i] == answer[i])
            {
                black++;
                answer[i] = - answer[i];
            }
        }
        
        /**
         * looks for whites and then negates the position
         */
        for (int i = 0; i < guess.length; i++)
        {
            if (guess[i] != -answer[i])
            {
                for (int j = 0; j < answer.length; j++)
                {
                    if (guess[i] == answer[j])
                    {
                        white++;
                        answer[j] = -answer[j];
                        break;
                    }
                }
            }
        }
        
        /**
         * Reverses the negation of the previous loops
         */
        for (int i = 0; i < answer.length; i++)
        {
            if (answer[i] < 0)
            {
                answer[i] = -answer[i];
            }
        }
        
    }
    
    /**
     * Prints out the guess, followed by the results
     */
    public void print ()
    {
        System.out.print("Guess: ");
        for (int i = 0; i < guess.length; i++)
        {
            System.out.print (guess[i] + " ");
        }
        System.out.println("Black: " + black + " White: " + white);
    }
    
    /**
     * returns the number of blacks
     * 
     * @return      the number of blacks
     */
    public int getBlack()
    {
        return black;
    }
    
    /**
     * returns the number of whites
     * 
     * @return      the number of whites
     */
    public int getWhite()
    {
        return white;
    }
    
    /**
     * Determines if the game has been won and
     * returns a boolean value
     * 
     * @return      boolean that determines game over or not
     */
    public boolean done()
    {
        if(black == guess.length)
        {
            return true;
        }
        else
        {
            return false;
        }
    }
    
    // instance fields
    private int [] guess;
    private int [] answer;
    private int black;
    private int white;
    
}