package backend;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;

public class AutoPlayer {
	
	
	/**
	 * returns the best Move to try on provided board for active player
	 * @param board
	 * @return
	 */
	public Move computeBestMove(Board board) {
	        List<Move> allPossibleMoves = new ArrayList<>();
	        boolean isWhiteTurn = board.isTurnWhite();

	        for (Piece piece : board.getPieces()) {
	            if (piece.isWhite() == isWhiteTurn) {
	                board.userTouch(piece.getX(), piece.getY()); // triggers highlighting

	                for (int newX = 0; newX < board.getWidth(); newX++) {
	                    for (int newY = 0; newY < board.getHeight(); newY++) {
	                        if (board.isHighlighted(newX, newY)) {
	                            allPossibleMoves.add(new Move(piece.getX(), piece.getY(), newX, newY, piece));
	                        }
	                    }
	                }
	            }
	        }

	        if (allPossibleMoves.isEmpty()) return null;

	        Random rand = new Random();
	        return allPossibleMoves.get(rand.nextInt(allPossibleMoves.size()));
	    }
	}