public char Guess(Position position)
{
Console.WriteLine("Guessing: {0}, {1}", position.ColFromLeft, position.RowFromTop);
var info = Reveal(position);
RenderAll(info);
return info;
}
public bool CanGo(Position position)
{
return position.ColFromLeft >= 1 &&
position.ColFromLeft <= Width &&
position.RowFromTop >= 1 &&
position.RowFromTop <= Height;
}
private static IEnumerable<Position> Get360Positions(Position position)
{
yield return position.Left();
yield return position.Up().Left();
yield return position.Up();
yield return position.Up().Right();
yield return position.Right();
yield return position.Down().Right();
yield return position.Down();
yield return position.Down().Left();
}
public void AddMine(Position position)
{
SetField(_hiddenField, position, BOMB);
}
private int TryLook(Position position)
{
if (CanGo(position)) return Look(position);
return 0;
}
private bool ShouldStopLooking(Position position)
{
if (!CanGo(position)) return true;
return IsVisible(position);
}
private void SetField(char[][] field, Position position, char value)
{
field[position.RowFromTop - 1][position.ColFromLeft - 1] = value;
}
private char RevealPosition(Position position)
{
char info = CalcWarning(position);
SetField(_visibleField, position, info);
return info;
}
private int CalcWarningSide(Position position, int warning)
{
warning += TryLook(position);
warning = CalcWarningUpAndDown(position, warning);
return warning;
}
private char Reveal(Position position)
{
var info = RevealPosition(position);
if (info == NOTHING) RevealAdjacent(position);
return info;
}
private int Look(Position position)
{
return IsMineAt(position) ? 1 : 0;
}
private bool IsVisible(Position position)
{
return GetField(_visibleField, position) != UNKNOWN;
}
private bool IsMineAt(Position position)
{
return GetField(_hiddenField, position) == BOMB;
}
private char GetField(char[][] field, Position position)
{
return field[position.RowFromTop - 1][position.ColFromLeft - 1];
}
private int CalcWarningUpAndDown(Position position, int warning)
{
warning += TryLook(position.Up());
warning += TryLook(position.Down());
return warning;
}
private void RevealAdjacent(Position position)
{
foreach (var pos in Get360Positions(position))
{
if (ShouldStopLooking(pos)) continue;
if (RevealPosition(pos) == NOTHING) RevealAdjacent(pos);
}
}
private char CalcWarning(Position position)
{
if (IsMineAt(position)) return BOMB;
var warning = Get360Positions(position).Sum(pos => TryLook(pos));
return ConvertWarningToString(warning);
}