/// <summary>
/// Set up a game.
/// </summary>
/// <param name="setup">The numbers in this game, as a two dimensional array.</param>
public Game(int?[,] setup)
{
for (int i = 0; i < 9; i++)
{
for (int j = 0; j < 9; j++)
{
Tile tile = new Tile(setup[i, j]);
tile.XIndex = i;
tile.YIndex = j;
_tiles[i, j] = tile;
}
}
for (int i = 0; i < 9; i++)
{
_rows[i] = new TileCollection(GetRow(_tiles, i));
_columns[i] = new TileCollection(GetColumn(_tiles, i));
foreach (Tile tile in _rows[i].Tiles)
tile.Row = _rows[i];
foreach (Tile tile in _columns[i].Tiles)
tile.Column = _columns[i];
}
for (int i = 0; i < 3; i++)
{
for (int j = 0; j < 3; j++)
{
int index = i * 3 + j;
_squares[index] = new TileCollection(GetSquare(_tiles, i, j));
foreach (Tile tile in _squares[index].Tiles)
tile.Square = _squares[index];
}
}
}
private static IEnumerable<Tile> GetRow(Tile[,] tiles, int rowIndex)
{
for (int i = 0; i < 9; i++)
yield return tiles[rowIndex, i];
}
private static IEnumerable<Tile> GetSquare(Tile[,] tiles, int vertIndex, int horzIndex)
{
int startRow = vertIndex * 3;
int startColumn = horzIndex * 3;
for (int i = startRow; i < startRow + 3; i++)
{
for (int j = startColumn; j < startColumn + 3; j++)
{
yield return tiles[i, j];
}
}
}
private static IEnumerable<Tile> GetColumn(Tile[,] tiles, int colIndex)
{
for (int i = 0; i < 9; i++)
yield return tiles[i, colIndex];
}