104 lines
3.3 KiB
Dart
104 lines
3.3 KiB
Dart
import 'dart:developer';
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import 'package:mchess/utils/chess_utils.dart';
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typedef ChessPositionType = Map<ChessCoordinate, ChessPiece>;
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typedef ChessMoveHistory = List<ChessMove>;
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class ChessPosition {
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static final ChessPosition _instance = ChessPosition._internal();
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final ChessPositionType position;
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ChessMoveHistory history = ChessMoveHistory.empty(growable: true);
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static ChessPosition getInstance() {
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return _instance;
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}
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ChessPosition({required this.position});
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factory ChessPosition._internal() {
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ChessPositionType pos = {};
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for (int i = 1; i <= 8; i++) {
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pos[ChessCoordinate(i, 7)] =
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ChessPiece(ChessPieceName.blackPawn, ChessColor.black);
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pos[ChessCoordinate(i, 2)] =
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ChessPiece(ChessPieceName.whitePawn, ChessColor.white);
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}
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pos[ChessCoordinate(1, 8)] =
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ChessPiece(ChessPieceName.blackRook, ChessColor.black);
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pos[ChessCoordinate(2, 8)] =
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ChessPiece(ChessPieceName.blackKnight, ChessColor.black);
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pos[ChessCoordinate(3, 8)] =
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ChessPiece(ChessPieceName.blackBishop, ChessColor.black);
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pos[ChessCoordinate(4, 8)] =
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ChessPiece(ChessPieceName.blackQueen, ChessColor.black);
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pos[ChessCoordinate(5, 8)] =
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ChessPiece(ChessPieceName.blackKing, ChessColor.black);
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pos[ChessCoordinate(6, 8)] =
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ChessPiece(ChessPieceName.blackBishop, ChessColor.black);
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pos[ChessCoordinate(7, 8)] =
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ChessPiece(ChessPieceName.blackKnight, ChessColor.black);
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pos[ChessCoordinate(8, 8)] =
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ChessPiece(ChessPieceName.blackRook, ChessColor.black);
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pos[ChessCoordinate(1, 1)] =
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ChessPiece(ChessPieceName.whiteRook, ChessColor.white);
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pos[ChessCoordinate(2, 1)] =
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ChessPiece(ChessPieceName.whiteKnight, ChessColor.white);
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pos[ChessCoordinate(3, 1)] =
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ChessPiece(ChessPieceName.whiteBishop, ChessColor.white);
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pos[ChessCoordinate(4, 1)] =
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ChessPiece(ChessPieceName.whiteQueen, ChessColor.white);
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pos[ChessCoordinate(5, 1)] =
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ChessPiece(ChessPieceName.whiteKing, ChessColor.white);
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pos[ChessCoordinate(6, 1)] =
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ChessPiece(ChessPieceName.whiteBishop, ChessColor.white);
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pos[ChessCoordinate(7, 1)] =
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ChessPiece(ChessPieceName.whiteKnight, ChessColor.white);
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pos[ChessCoordinate(8, 1)] =
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ChessPiece(ChessPieceName.whiteRook, ChessColor.white);
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return ChessPosition(position: pos);
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}
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ChessPositionType get currentPosition => position;
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ChessMove get lastMove => history.last;
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void recordMove(ChessCoordinate from, ChessCoordinate to) {
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position[to] = position[from] ?? const ChessPiece.none();
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position[from] = const ChessPiece.none();
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history.add(ChessMove(from: from, to: to));
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logPosition(position);
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logHistory(history);
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}
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void logPosition(ChessPositionType p) {
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String logString = '';
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for (int row = 8; row > 0; row--) {
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for (int col = 1; col <= 8; col++) {
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var coord = ChessCoordinate(col, row);
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if (p.containsKey(coord)) {
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logString = '$logString ${p[coord]?.shortName}';
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} else {
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logString = '$logString .';
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}
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}
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logString = '$logString\n';
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}
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log(logString);
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}
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void logHistory(ChessMoveHistory hist) {
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hist.forEach((element) {
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log('${element.from.toAlphabetical()} -> ${element.to.toAlphabetical()}');
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});
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}
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}
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