EasyAI.java

/**
* EasyAI.java
*
* @author Deep Patel
*
* REMARKS: This class implements the easy AI which just implements
* random valid chess moves 
*/

import java.util.Random;

public class EasyAI implements ChessPlayer {
    //Constructor
    EasyAI(){}

     /**
   * This method is used to make a move by the easy ai which just make a 
   * random valid move on the board
   *
   * Parameters:
   * Board board - The method take in the current state of the board to validate the move
   * Move move - The method takes in the last move made by the player
   *
   * Returns the move to be made by the AI
   */
    public Move makeMove(Move move, Board board) {
        Move m = null;
        boolean isVal = false;
        //Generate moves until valid move is acquired
        while (!isVal) {
            int fromR = generateRandomInt();
            int fromC = generateRandomInt();
            Piece p = board.getBox(fromR, fromC).getPiece();
            if(p != null && !p.getWhosePiece()){
                int toR = generateRandomInt();
                int toC = generateRandomInt();
                if(board.getBox(toR, toC).getPiece() == null){
                    m = new Move(fromR+1, fromC+1, toR+1, toC+1, false, false);
                    if (p instanceof Pawn) {
                        ((Pawn) p).setTurn(false);
                    }
                    isVal = p.isValidMove(board, m);
                }else if(board.getBox(toR, toC).getPiece().getWhosePiece()){
                    m = new Move(fromR+1, fromC+1, toR+1, toC+1, false, false);
                    if (p instanceof Pawn) {
                        ((Pawn) p).setTurn(false);
                    }
                    isVal = p.isValidMove(board, m);
                }
            }
        }
        m.setPiece(move.getPiece());
        return m;
    }

    //Generates a random integer from 0 to 7
    private int generateRandomInt(){
        Random rand = new Random();
        return rand.nextInt(8);
    }
}