public SudokuViewModel() : this(
IoCContainer.Resolve <ISudokuFileLoader>(),
IoCContainer.Resolve <ISudokuGenerator>())
{
_board = new int?[9][];
CurrentSudokuDifficultyLevel = SudokuDifficultyLevel.Easy;
}
public Sudoku(List <SudokuCell> cells)
{
if (cells == null)
{
throw new ArgumentNullException("cells can't be equal to null");
}
_cells = cells;
_sudokuSolver = ServiceLocator.Current.GetInstance <ISudokuSolver>();
_sudokuComplexityEstimator = ServiceLocator.Current.GetInstance <ISudokuComplexityEstimator>();
_sudokuDifficultyLevel = _sudokuComplexityEstimator.EstimateComplexityLevel(this);
}
public int GetNumberOfFreeCellsByComplexityLevel(SudokuDifficultyLevel sudokuDifficultyLevel)
{
switch (sudokuDifficultyLevel)
{
case SudokuDifficultyLevel.Easy:
return(49);
case SudokuDifficultyLevel.Medium:
return(53);
case SudokuDifficultyLevel.Hard:
return(57);
case SudokuDifficultyLevel.Samurai:
default:
return(58);
}
}
public Sudoku GenerateSudoku(SudokuDifficultyLevel difficultyLevel)
{
var newSudokuMatrix = GenerateMatrix();
var nullableSudokuMatrix = new int?[9][];
for (int i = 0; i < 9; i++)
{
if (nullableSudokuMatrix[i] == null)
{
nullableSudokuMatrix[i] = new int?[9];
}
for (int j = 0; j < 9; j++)
{
nullableSudokuMatrix[i][j] = newSudokuMatrix[i][j];
}
}
var symetry = SudokuSymetry.VerticalHorizontal;
if (difficultyLevel == SudokuDifficultyLevel.Hard || difficultyLevel == SudokuDifficultyLevel.Samurai)
{
symetry = SudokuSymetry.Diagonal;
}
// fetching number of empty cells per level
int emptyCellsRequiredForLevel = _sudokuComplexityEstimator.GetNumberOfFreeCellsByComplexityLevel(difficultyLevel);
int currentEmptyCellsCount = 0;
var generatedEmptyCellsPossibleCoordinates = GenerateSymeticCoordinates(symetry);
while (currentEmptyCellsCount < emptyCellsRequiredForLevel)
{
if (!generatedEmptyCellsPossibleCoordinates.Any())
{
generatedEmptyCellsPossibleCoordinates = GenerateSymeticCoordinates(symetry);
}
var coord = generatedEmptyCellsPossibleCoordinates.Pop();
if (nullableSudokuMatrix[coord.X][coord.Y] == null)
{
continue;
}
nullableSudokuMatrix[coord.X][coord.Y] = null;
currentEmptyCellsCount++;
}
var sudokuCells = new List <SudokuCell>();
for (int i = 0; i < 9; i++)
{
for (int j = 0; j < 9; j++)
{
var cell = new SudokuCell();
cell.X = j;
cell.Y = i;
cell.Value = nullableSudokuMatrix[i][j];
cell.Initial = nullableSudokuMatrix[i][j] != null;
cell.Block = SudokuCell.GetBlock(cell.X, cell.Y);
sudokuCells.Add(cell);
}
}
return(new Sudoku(sudokuCells));
}
