/// <summary>
/// Open given tile
/// Change closed status of userdBoard to Empty or Numerical
/// Recursive function - open all empty cells adjacent to given empty cell
/// </summary>
/// <param name="userBoard">The board on which it will open the tile</param>
/// <param name="position">Tile coordinates to open</param>
/// <returns>State of open tile </returns>
public Cell Open(ref Board userBoard, Tuple <int, int> position)
{
int x = position.Item1;
int y = position.Item2;
if (isFirstMove)
{
isFirstMove = false;
GenerateMineField(width, height, mineNumber, position);
}
if (board.getBoard()[x][y].cell == Cell.EMPTY)
{
for (int i = -1; i <= 1; i++)
{
//check the horizontal range of board
if (x + i >= 0 && x + i < width)
{
for (int j = -1; j <= 1; j++)
{
//check the vertical range of board and tile state
if (y + j >= 0 && y + j < height && userBoard.getBoard()[x + i][y + j].cell == Cell.CLOSED)
{
//check if empty cell if so open function call itself again with the position of adjacent empty cell
//open numerical cell adjacent to empty cell
if (board.getBoard()[x + i][y + j].cell == Cell.EMPTY)
{
userBoard.getBoard()[x][y] = board.getBoard()[x][y];
Tuple <int, int> newPosition = new Tuple <int, int>(x + i, y + j);
Open(ref userBoard, newPosition);
}
else
{
userBoard.getBoard()[x + i][y + j] = board.getBoard()[x + i][y + j];
}
}
}
}
}
}
//if cell is the mine, return mine and the end of the game
else if (board.getBoard()[x][y].cell == Cell.MINE)
{
userBoard.getBoard()[x][y] = board.getBoard()[x][y];;
return(userBoard.getBoard()[x][y].cell);
}
else
{
//open numerical cell
userBoard.getBoard()[x][y] = board.getBoard()[x][y];
}
return(userBoard.getBoard()[x][y].cell);
}
/// <summary>
/// Set numerical values of tiles based on number of adjacent mines
/// </summary>
/// <param name="board">Board game</param>
/// <param name="x">Horizontal mine position</param>
/// <param name="y">Vertical mine position</param>
private void SetAdjacentCells(ref Board board, int x, int y)
{
for (int i = -1; i <= 1; i++)
{
//check the horizontal range of adjacent cell
if (x + i >= 0 && x + i < width)
{
for (int j = -1; j <= 1; j++)
{
//check the verticle range of adjacent cell if cell state is not a mine
if (y + j >= 0 && y + j < height && board.getBoard()[x + i][y + j].cell != Cell.MINE)
{
board.getBoard()[x + i][y + j].cell += 1;
}
}
}
}
}
/// <summary>
/// Search revealed tiles and flag obvious mines
/// </summary>
public void SearchRevealedTilesAndFlagObviousMines()
{
for (int i = 0; i < width; i++)
{
for (int j = 0; j < height; j++)
{
//enter if it is opened numerical tile
if (userBoard.getBoard()[i][j].cell != Cell.CLOSED &&
userBoard.getBoard()[i][j].cell != Cell.EMPTY &&
userBoard.getBoard()[i][j].cell != Cell.FLAG &&
userBoard.getBoard()[i][j].cell != Cell.MINE)
{
//Open function that flag the tile where is mine
FlagAdjacentHiddenTiles(userBoard.getBoard()[i][j], i, j);
}
}
}
}