/// <summary>
/// This will randomly pick a cell from the given puzzle
/// </summary>
/// <remarks>
/// If the picked cell has a value or is locked, then a new cell will be randomly chosen
/// </remarks>
/// <param name="puzzle"></param>
/// <returns></returns>
private Puzzle.Cell GetRandomCell(Puzzle puzzle)
{
int row = 0;
int col = 0;
Puzzle.Cell cell = null;
Random random = new Random();
do
{
row = random.Next(0, Puzzle.PUZZLE_GRID_SIZE);
col = random.Next(0, Puzzle.PUZZLE_GRID_SIZE);
cell = puzzle.GetCell(row, col);
} while (cell.IsLocked || cell.Value.HasValue);
return(cell);
}
/// <summary>
/// Clone this puzzle.
/// </summary>
/// <remarks>
/// This is useful for keeping a solved puzzle, ie to use for hints, and the one the player is working on
/// </remarks>
/// <returns>Puzzle</returns>
public Puzzle Clone()
{
Puzzle clonePuzzle = new Puzzle();
Cell cloneCell = null;
// Iterate through this puzzle and set the values of the cloned puzzle
IEnumerable <Cell> cells = GetCells();
foreach (Cell cell in cells)
{
// Technically, we can access the private member _puzzle within the clonePuzzle. Some people view it as bad practice
// cloneCell = clonePuzzle._puzzle[cell.Row, cell.Column];
cloneCell = clonePuzzle.GetCell(cell.Row, cell.Column);
cloneCell.Value = cell.Value;
cloneCell.IsLocked = cell.IsLocked;
}
return(clonePuzzle);
}