import 'package:omnichess/classes/position.dart';
import 'package:omnichess/constants/piece.dart';
import 'package:omnichess/exceptions/king_not_found.dart';

part "_partials/legal_moves_black.dart";
part "_partials/legal_moves_white.dart";

class LegalMoves {
  LegalMoves._();

  static Stream<(String, Position)> getLegalMoves(Position position) => position.isWhiteTurn
    ? _LegalMovesWhite._getLegalMoves(position)
    : _LegalMovesBlack._getLegalMoves(position);
  
  static Future<bool> isCheckmate(Position position) async => position.isWhiteTurn
      ? (_LegalMovesWhite._isWhiteChecked(position) && await getLegalMoves(position).isEmpty)
      : (_LegalMovesBlack._isBlackChecked(position) && await getLegalMoves(position).isEmpty);

}