namespace TicTacToe {
    public class Grid {
        private readonly Player[,] _field;
        private const int GRIDSIZE = 3;
        public bool GameOver => IsGameOver();

        private bool IsGameOver() {
            for (var x = 0; x < GRIDSIZE; x++)
                for (var y = 0; y < GRIDSIZE; y++)
                    if (IsFieldEmpty(x, y))
                        return false;
            return true;
        }

        private bool IsFieldEmpty(int x, int y) {
            return _field[x, y] == Player.Empty;
        }

        public Grid() {
            _field = new Player[GRIDSIZE, GRIDSIZE];
        }

        public bool PickSpot() {
        }
    }
}