/// <summary>
/// Read the notations in the provided string.
/// </summary>
/// <param name="curgame">the string to decipher.</param>
public void Read(string curgame)
{
int lastIndex = 0;
int nextIndex = 0;
string move = curgame.Substring(lastIndex, nextIndex);
NotationType ntype = NotationType.Algebraic; //= NotationType.Coordinate;
//Debug.Log("first move:" + move);
//if (move.Contains("-")) ntype = NotationType.Coordinate;
moves = new List <cgSimpleMove>();
if (ntype == NotationType.Coordinate)
{
while (lastIndex != -1)
{
byte fromp = board.IndexFromCellName(move.Substring(0, 2));
byte top = board.IndexFromCellName(move.Substring(3, 2));
moves.Add(new cgSimpleMove(fromp, top));
nextIndex = curgame.IndexOf(" ", lastIndex + 1);
if (nextIndex == -1)
{
break;
}
move = curgame.Substring(lastIndex + 1, nextIndex - lastIndex);
lastIndex = nextIndex;
//Debug.Log("current move being analyzed="+move);
}
}
else if (ntype == NotationType.Algebraic)
{
cgBoard disambBoard = new cgBoard();
cgSimpleMove chosenMove;
while (lastIndex != -1)
{
chosenMove = null;
nextIndex = curgame.IndexOf(" ", nextIndex + 1);
if (nextIndex == -1 || lastIndex == -1)
{
break;
}
move = curgame.Substring(lastIndex + 1, nextIndex - lastIndex);
bool legitMove = (!move.Contains(".") && move.Length > 1 && !move.Contains("\n")) ? true : false;
move = move.Trim(' ');
//move = move.Trim('\n');
//Debug.Log("trimmed:" + move+" contains .:"+move.Contains(".")+" contains newline:"+move.Contains("\n")+" legit move:"+legitMove);
if (move.Contains("{"))
{
nextIndex = curgame.IndexOf("}", lastIndex + 1);
}
else if (move.Contains("["))
{
nextIndex = curgame.IndexOf("]", lastIndex + 1);
}
else if (legitMove)
{
//Debug.Log("found to be legit move.");
byte tosquare;
byte pushback = 2;
byte type = 1;
//bool promotion = false;
bool shortCastling = (move == "O-O");
bool longCastling = (move == "O-O-O");
if (move.Contains("="))
{
//promotion = true;
move.Remove(move.IndexOf("="), 2);
}
else if (move.Contains("+"))
{
move.Remove(move.IndexOf("+"), 1);
}
else if (move.Contains("!"))
{
move.Remove(move.IndexOf("!"), 1);
}
else if (move.Contains("?"))
{
move.Remove(move.IndexOf("?"), 1);
}
tosquare = board.IndexFromCellName(move.Substring(move.Length - pushback, 2));
if (move[0] == 'R')
{
type = 2;
}
if (move[0] == 'N')
{
type = 3;
}
if (move[0] == 'B')
{
type = 4;
}
if (move[0] == 'Q')
{
type = 5;
}
if (move[0] == 'K')
{
type = 6;
}
List <cgSimpleMove> ambiguousMoves = new List <cgSimpleMove>();
foreach (cgSimpleMove legalMove in disambBoard.findLegalMoves(disambBoard.whiteTurnToMove))
{
if (shortCastling && legalMove is cgCastlingMove)
{
if (legalMove.to == 6 || legalMove.to == 62)
{
chosenMove = legalMove;
break;
}
}
else if (longCastling && legalMove is cgCastlingMove)
{
if (legalMove.to == 2 || legalMove.to == 58)
{
chosenMove = legalMove;
break;
}
}
if (Math.Abs(disambBoard.squares[legalMove.from]) == type && legalMove.to == tosquare)
{
ambiguousMoves.Add(legalMove);
}
}
if (ambiguousMoves.Count == 0 && chosenMove == null)
{
//Debug.WriteLine("found no matching move for the string: " + move+" type:"+type+" tosquare:"+tosquare+" chosenMove:"+chosenMove+" castling:"+shortCastling);
break;
}
else if (ambiguousMoves.Count == 1)
{
chosenMove = ambiguousMoves[0];
}
else if (ambiguousMoves.Count > 1)
{
//UnityEngine.Debug.Log("2 or mroe ambiguousmoves");
//2 or more ambiguous moves in which the piece type matches and the destination square matches. Further disambiguation needed.
List <cgSimpleMove> matching = new List <cgSimpleMove>();
foreach (cgSimpleMove mov in ambiguousMoves)
{
if (board.SquareNames[mov.from].Contains(move.Substring(1 + (type == 1?-1:0), 1)))
{
matching.Add(mov);
}
}
if (matching.Count == 1)
{
chosenMove = matching[0]; //only 1 of the ambiguous moves have the correct rank and/or file.
}
else
{
foreach (cgSimpleMove mov in ambiguousMoves)
{
if (board.SquareNames[mov.from].Contains(move.Substring(1, 2)))
{
chosenMove = ambiguousMoves[0];
break;
}
}
}
}
if (chosenMove != null)
{
disambBoard.move(chosenMove);
moves.Add(chosenMove);
}
}
Debug.WriteLine("legitmove:" + legitMove);
lastIndex = nextIndex;
}
}
}