// CONSTRUCTORS
public SudokuGame(Difficulty difficulty)
{
Console.WriteLine(SudokuPrint.GeneratingPuzzleMsg);
SudokuPuzzleFactory factory = new SudokuPuzzleFactory();
this.puzzle = factory.CreateSudokuPuzzle(difficulty);
}
private SudokuPuzzle initSudokuGrid()
{
SudokuPuzzle puzzle = null;
do
{
puzzle = attemptToInitSudokuGrid();
}while(puzzle == null);
return(puzzle);
}
private SudokuPuzzle attemptToInitSudokuGrid()
{
SudokuPuzzle puzzle = new SudokuPuzzle();
Random valueGenerator = new Random();
int number;
for (int y = 0; y < 9; y++)
{
for (int x = 0; x < 9; x++)
{
int bx = x / 3, cx = x % 3;
int by = y / 3, cy = y % 3;
int counter = 0;
do
{
number = valueGenerator.Next(1, 10);
counter++;
if (counter == maxValueGeneratorAttempts)
{
return(null);
}
} while(
puzzle.Rows[x].ContainsNumber(number) ||
puzzle.Columns[y].ContainsNumber(number) ||
puzzle.Blocks[bx, by].ContainsNumber(number)
);
SudokuCell c = new SudokuCell(puzzle, number);
puzzle.Grid[x, y] = c;
puzzle.Rows[x].Cells[y] = c;
puzzle.Columns[y].Cells[x] = c;
puzzle.Blocks[bx, by].Cells[cx, cy] = c;
}
}
return(puzzle);
}
private SudokuPuzzle decorateSudokuPuzzle(SudokuGame.Difficulty difficulty, SudokuPuzzle puzzle)
{
int x, y, counter = 0;
int valuesToHide = getValuesToHide(difficulty);
Random rand = new Random();
do
{
x = rand.Next(0, 9);
y = rand.Next(0, 9);
if (puzzle.Grid[x, y].IsEditable)
{
continue;
}
puzzle.Grid[x, y].IsEditable = true;
puzzle.DecValues();
counter++;
}while(counter < valuesToHide);
return(puzzle);
}
// METHODS
public SudokuPuzzle CreateSudokuPuzzle(SudokuGame.Difficulty difficulty)
{
SudokuPuzzle puzzle = initSudokuGrid();
return(decorateSudokuPuzzle(difficulty, puzzle));
}
