public void Start()
{
if (!GameHistory.PeekLastMove().IsValid())
{
NextPlayersTurnEvent?.Invoke(this, NextPlayer);
}
}
public void Undo()
{
if (GameEnded)
{
GameEnded = false;
Winner = FieldState.Empty;
}
//LAST MOVE WAS GIVE-UP MOVE
if (!GameHistory.PeekLastMove().IsValid())
{
GameHistory.PopLastMove();
}
GameHistory.RemoveState(GameBoard.ToString());
Move lastMove = GameHistory.PopLastMove();
//LAST MOVE WAS CAPTURE, UNDO ONE MORE MOVE
if (lastMove.To < 0)
{
GameBoard.PlaceAt(lastMove.From, (FieldState)(-(int)lastMove.Player));
Move oneMore = GameHistory.PopLastMove();
if (oneMore.Player != lastMove.Player)
{
throw new InvalidOperationException();
}
if (oneMore.To >= 0)
{
GameBoard.RemoveFrom(oneMore.To);
}
if (oneMore.From >= 0)
{
GameBoard.PlaceAt(oneMore.From, oneMore.Player);
}
// LAST MOVE WAS PLACEMENT, ADD PAWN TO HAND
if (oneMore.From < 0)
{
if (oneMore.Player == FieldState.White)
{
_whitesInHand++;
}
else if (oneMore.Player == FieldState.Black)
{
_blacksInHand++;
}
}
}
// LAST MOVE WAS REGULAR MOVE
else
{
if (lastMove.To >= 0)
{
GameBoard.RemoveFrom(lastMove.To);
}
if (lastMove.From >= 0)
{
GameBoard.PlaceAt(lastMove.From, lastMove.Player);
}
// IF LAST MOVE WAS PLACEMENT, ADD PAWN TO HAND
if (lastMove.From < 0)
{
if (lastMove.Player == FieldState.White)
{
_whitesInHand++;
}
else if (lastMove.Player == FieldState.Black)
{
_blacksInHand++;
}
}
}
NextPlayer = lastMove.Player;
NextPlayersTurnEvent?.Invoke(this, NextPlayer);
}
