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package com.brettonw.game;

public class Move {

    private int x;
    private int y;

    public Move (int x, int y) throws InvalidMoveException {
        if ((x >= 0) && (x < Board.DIMENSION) && (y >= 0) && (y < Board.DIMENSION)) {
            this.x = x;
            this.y = y;
        } else {
            throw new InvalidMoveException (x, y);
        }
    }

    public int getX () {
        return x;
    }

    public int getY () {
        return y;
    }

    public int getOffset () {
        return (y * Board.DIMENSION) + x;
    }

    @Override
    public String toString () {
        return "(" + x + ", " + y + ")";
    }

    @Override
    public boolean equals (Object obj) {
        boolean result = obj instanceof  Move;
        Move move = (Move) obj;
        result &= (getOffset () == move.getOffset ());
        return result;
    }

    @Override
    public int hashCode () {
        return getOffset ();
    }
}