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

  static bool isWhiteAttacking(Position position, int square) => _LegalMovesBlack._isWhiteAttacking(position, square);
  static bool isBlackAttacking(Position position, int square) => _LegalMovesWhite._isBlackAttacking(position, square);
  static bool isWhiteChecked(Position position) => _LegalMovesWhite._isWhiteChecked(position);
  static bool isBlackChecked(Position position) => _LegalMovesBlack._isBlackChecked(position);

}