public static SudokuMatrixModel GenerateRandomBoard()
{
var model = new SudokuMatrixModel();
// add thirty values
var count = 0;
var r = new Random();
var usedSquares = new HashSet <Index>();
while (true)
{
if (count == 30)
{
break;
}
// the max value for Next is EXCLUSIVE
var nextX = r.Next(0, CellCount);
var nextY = r.Next(0, CellCount);
var nextIx = new Index(nextX, nextY);
if (usedSquares.Contains(nextIx))
{
continue;
}
var nextVal = r.Next(1, CellCount + 1);
var c = model.GetCell(nextX, nextY);
model.UpdateValue(c, nextVal);
count++;
usedSquares.Add(nextIx);
Console.WriteLine($"Set {nextIx} to {nextVal}");
}
return(model);
}
static void RunSudoku()
{
var matrix = SudokuMatrixModel.GenerateRandomBoard();
Console.Write(matrix.ToString());
var valid = matrix.Validate();
Console.WriteLine("Matrix is {0}", valid ? "valid" : "invalid!");
var errors = matrix.GetInvalidCells().OrderBy(x => x.Ix.Row).ThenBy(x => x.Ix.Column);
foreach (var item in errors)
{
Console.WriteLine("Cell {0} is invalid", item);
}
var gridErrors = matrix.GetInvalidGrids().OrderBy(x => x.Ix.Row).ThenBy(x => x.Ix.Column);
foreach (var item in gridErrors)
{
Console.WriteLine("Grid {0} is invalid", item);
}
}
