konecne spravne H1, G2 aA HURA

import chess
from typing import Iterator, Optional
from chess import Move, BB_ALL, Bitboard, PieceType, Color

# Definice nových figur
AMAZON = 7

# Rozšíření seznamu PIECE_SYMBOLS
chess.PIECE_SYMBOLS.append('a')

class CustomBoard(chess.Board):
    def __init__(self, fen=None):
        self.amazons_white = chess.BB_EMPTY
        self.amazons_black = chess.BB_EMPTY
        super().__init__(None)
        if fen:
            self.set_custom_fen(fen)
        print("Šachovnice inicializována")
        self.debug_amazons()

    def set_custom_fen(self, fen):
        parts = fen.split()
        board_part = parts[0]

        self.clear()
        self.amazons_white = chess.BB_EMPTY
        self.amazons_black = chess.BB_EMPTY

        square = 56
        for c in board_part:
            if c == '/':
                square -= 16
            elif c.isdigit():
                square += int(c)
            else:
                color = chess.WHITE if c.isupper() else chess.BLACK
                if c.upper() == 'A':
                    if color == chess.WHITE:
                        self.amazons_white |= chess.BB_SQUARES[square]
                    else:
                        self.amazons_black |= chess.BB_SQUARES[square]
                    piece_type = AMAZON
                else:
                    piece_type = chess.PIECE_SYMBOLS.index(c.lower())
                self._set_piece_at(square, piece_type, color)
                square += 1

        self.turn = chess.WHITE if parts[1] == 'w' else chess.BLACK
        self.castling_rights = chess.BB_EMPTY
        if '-' not in parts[2]:
            if 'K' in parts[2]: self.castling_rights |= chess.BB_H1
            if 'Q' in parts[2]: self.castling_rights |= chess.BB_A1
            if 'k' in parts[2]: self.castling_rights |= chess.BB_H8
            if 'q' in parts[2]: self.castling_rights |= chess.BB_A8
        self.ep_square = chess.parse_square(parts[3]) if parts[3] != '-' else None
        self.halfmove_clock = int(parts[4])
        self.fullmove_number = int(parts[5])

    def _set_piece_at(self, square: chess.Square, piece_type: PieceType, color: Color) -> None:
        super()._set_piece_at(square, piece_type, color)
        if piece_type == AMAZON:
            if color == chess.WHITE:
                self.amazons_white |= chess.BB_SQUARES[square]
            else:
                self.amazons_black |= chess.BB_SQUARES[square]
        else:
            self.amazons_white &= ~chess.BB_SQUARES[square]
            self.amazons_black &= ~chess.BB_SQUARES[square]

    def piece_at(self, square: chess.Square) -> Optional[chess.Piece]:
        if self.amazons_white & chess.BB_SQUARES[square]:
            return chess.Piece(AMAZON, chess.WHITE)
        elif self.amazons_black & chess.BB_SQUARES[square]:
            return chess.Piece(AMAZON, chess.BLACK)
        return super().piece_at(square)

    def generate_pseudo_legal_moves(self, from_mask: Bitboard = BB_ALL, to_mask: Bitboard = BB_ALL) -> Iterator[Move]:
        our_pieces = self.occupied_co[self.turn]
        if self.turn == chess.WHITE:
            our_amazons = self.amazons_white
        else:
            our_amazons = self.amazons_black

        for from_square in chess.scan_forward(our_amazons & from_mask):
            attacks = self.amazon_attacks(from_square)
            valid_moves = attacks & ~our_pieces & to_mask
            for to_square in chess.scan_forward(valid_moves):
                yield Move(from_square, to_square)

        for move in super().generate_pseudo_legal_moves(from_mask, to_mask):
            if self.piece_type_at(move.from_square) != AMAZON:
                yield move

    def amazon_attacks(self, square):
        return self.queen_attacks(square) | chess.BB_KNIGHT_ATTACKS[square]

    def queen_attacks(self, square):
        return self.bishop_attacks(square) | self.rook_attacks(square)

    def bishop_attacks(self, square):
        return chess.BB_DIAG_ATTACKS[square][self.occupied & chess.BB_DIAG_MASKS[square]]

    def rook_attacks(self, square):
        return (chess.BB_RANK_ATTACKS[square][self.occupied & chess.BB_RANK_MASKS[square]] |
                chess.BB_FILE_ATTACKS[square][self.occupied & chess.BB_FILE_MASKS[square]])

    def is_pseudo_legal(self, move):
        from_square = move.from_square
        to_square = move.to_square
        piece = self.piece_at(from_square)

        if not piece or piece.color != self.turn:
            return False

        if self.occupied_co[self.turn] & chess.BB_SQUARES[to_square]:
            return False

        if self.is_castling(move):
            return True

        if piece.piece_type == AMAZON:
            return bool(self.amazon_attacks(from_square) & chess.BB_SQUARES[to_square])
        else:
            return super().is_pseudo_legal(move)

    def is_legal(self, move):
        print(f"Kontrola legality tahu: {move}")
        if not self.is_pseudo_legal(move):
            return False

        from_square = move.from_square
        to_square = move.to_square
        piece = self.piece_at(from_square)
        captured_piece = self.piece_at(to_square)

        self._remove_piece_at(from_square)
        self._set_piece_at(to_square, piece.piece_type, piece.color)

        king_square = to_square if piece.piece_type == chess.KING else self.king(self.turn)
        is_check, attacker_square = self._is_attacked_by(not self.turn, king_square)

        self._remove_piece_at(to_square)
        self._set_piece_at(from_square, piece.piece_type, piece.color)
        if captured_piece:
            self._set_piece_at(to_square, captured_piece.piece_type, captured_piece.color)

        if is_check:
            attacking_piece = self.piece_at(attacker_square)
            print(f"Tah {move} staví vlastního krále do šachu od figury {self.piece_symbol(attacking_piece)} na {chess.SQUARE_NAMES[attacker_square]}")
        return not is_check

    def _is_attacked_by(self, color, square):
        print(f"Kontrola útoku na pole {chess.SQUARE_NAMES[square]} od barvy {'bílé' if color == chess.WHITE else 'černé'}")
        attackers = self.attackers(color, square)
        if attackers:
            for attacker_square in chess.scan_forward(attackers):
                piece = self.piece_at(attacker_square)
                attacker_color = "bílá" if piece.color == chess.WHITE else "černá"
                print(f"Figura {self.piece_symbol(piece)} ({attacker_color}) na {chess.SQUARE_NAMES[attacker_square]} útočí na {chess.SQUARE_NAMES[square]}")
                return True, attacker_square
        print(f"Žádný útok na pole {chess.SQUARE_NAMES[square]} nebyl nalezen")
        return False, None

    def attackers(self, color, square):
        attackers = chess.BB_EMPTY

        knights = self.knights & self.occupied_co[color]
        attackers |= knights & chess.BB_KNIGHT_ATTACKS[square]

        king = self.kings & self.occupied_co[color]
        attackers |= king & chess.BB_KING_ATTACKS[square]

        pawns = self.pawns & self.occupied_co[color]
        if color == chess.WHITE:
            attackers |= pawns & chess.BB_PAWN_ATTACKS[chess.BLACK][square]
        else:
            attackers |= pawns & chess.BB_PAWN_ATTACKS[chess.WHITE][square]

        queens = self.queens & self.occupied_co[color]
        bishops = (self.bishops | queens) & self.occupied_co[color]
        rooks = (self.rooks | queens) & self.occupied_co[color]

        attackers |= chess.BB_DIAG_ATTACKS[square][self.occupied & chess.BB_DIAG_MASKS[square]] & bishops
        attackers |= (chess.BB_RANK_ATTACKS[square][self.occupied & chess.BB_RANK_MASKS[square]] |
                      chess.BB_FILE_ATTACKS[square][self.occupied & chess.BB_FILE_MASKS[square]]) & rooks

        # Kontrola útoků amazonek
        amazons = self.amazons_white if color == chess.WHITE else self.amazons_black
        for amazon_square in chess.scan_forward(amazons):
            if self.amazon_attacks(amazon_square) & chess.BB_SQUARES[square]:
                attackers |= chess.BB_SQUARES[amazon_square]

        return attackers

    def push(self, move):
        if not self.is_legal(move):
            raise ValueError(f"Move {move} is not legal in position {self.fen()}")

        piece = self.piece_at(move.from_square)
        captured_piece = self.piece_at(move.to_square)

        self._remove_piece_at(move.from_square)
        self._set_piece_at(move.to_square, piece.piece_type, piece.color)

        if piece.piece_type == AMAZON:
            if piece.color == chess.WHITE:
                self.amazons_white &= ~chess.BB_SQUARES[move.from_square]
                self.amazons_white |= chess.BB_SQUARES[move.to_square]
            else:
                self.amazons_black &= ~chess.BB_SQUARES[move.from_square]
                self.amazons_black |= chess.BB_SQUARES[move.to_square]

        self.turn = not self.turn
        self.fullmove_number += 1 if self.turn == chess.WHITE else 0
        self.halfmove_clock += 1

        if captured_piece or piece.piece_type == chess.PAWN:
            self.halfmove_clock = 0

        self.move_stack.append(move)

    def pop(self):
        if not self.move_stack:
            return None

        move = self.move_stack.pop()

        piece = self.piece_at(move.to_square)
        self._remove_piece_at(move.to_square)
        self._set_piece_at(move.from_square, piece.piece_type, piece.color)

        if piece.piece_type == AMAZON:
            if piece.color == chess.WHITE:
                self.amazons_white &= ~chess.BB_SQUARES[move.to_square]
                self.amazons_white |= chess.BB_SQUARES[move.from_square]
            else:
                self.amazons_black &= ~chess.BB_SQUARES[move.to_square]
                self.amazons_black |= chess.BB_SQUARES[move.from_square]

        captured_piece = self.piece_at(move.to_square)
        if captured_piece:
            self._set_piece_at(move.to_square, captured_piece.piece_type, captured_piece.color)

        self.turn = not self.turn
        self.fullmove_number -= 1 if self.turn == chess.BLACK else 0

        return move

    def is_check(self):
        king_square = self.king(self.turn)
        if king_square is None:
            return False
        return self._is_attacked_by(not self.turn, king_square)[0]

    def debug_amazons(self):
        print(f"Bitboard bílých amazonek: {format(self.amazons_white, '064b')}")
        print(f"Bitboard černých amazonek: {format(self.amazons_black, '064b')}")
        for square in chess.SQUARES:
            if self.amazons_white & chess.BB_SQUARES[square]:
                print(f"Bílá amazonka na {chess.SQUARE_NAMES[square]}")
            if self.amazons_black & chess.BB_SQUARES[square]:
                print(f"Černá amazonka na {chess.SQUARE_NAMES[square]}")

    def piece_symbol(self, piece):
        if piece is None:
            return '.'
        if piece.piece_type == AMAZON:
            return 'A' if piece.color == chess.WHITE else 'a'
        return piece.symbol()

    def piece_type_at(self, square):
        if (self.amazons_white | self.amazons_black) & chess.BB_SQUARES[square]:
            return AMAZON
        return super().piece_type_at(square)

    def color_at(self, square):
        if self.amazons_white & chess.BB_SQUARES[square]:
            return chess.WHITE
        if self.amazons_black & chess.BB_SQUARES[square]:
            return chess.BLACK
        return super().color_at(square)

    @property
    def legal_moves(self):
        return [move for move in self.generate_pseudo_legal_moves() if self.is_legal(move)]

    def __str__(self):
        builder = []
        for square in chess.SQUARES_180:
            piece = self.piece_at(square)
            symbol = self.piece_symbol(piece) if piece else '.'
            builder.append(symbol)
            if chess.square_file(square) == 7:
                if square != chess.H1:
                    builder.append('\n')
        return ''.join(builder)

if __name__ == "__main__":
    start_fen = "a7/3k4/8/8/1B6/8/A7/6K1 w - - 0 1"

    print(f"Vytváření šachovnice s FEN: {start_fen}")
    board = CustomBoard(start_fen)

    print("Současná pozice:")
    print(board)

    print("Generování legálních tahů pro počáteční pozici...")
    legal_moves = list(board.legal_moves)
    print(f"Počet legálních tahů: {len(legal_moves)}")

    print("Legální tahy:")
    for move in legal_moves:
        from_square = chess.SQUARE_NAMES[move.from_square]
        to_square = chess.SQUARE_NAMES[move.to_square]
        piece = board.piece_at(move.from_square)
        print(f"{board.piece_symbol(piece)}: {from_square}-{to_square}")

    # Test tahu bílého krále z G1 na H1
    test_move = chess.Move.from_uci("g1h1")
    is_legal = board.is_legal(test_move)
    print(f"Je tah g1h1 legální? {'Ano' if is_legal else 'Ne'}")

    # for square in [chess.H1, chess.G2]:
    #     attackers = board.attackers(chess.BLACK, square)
    #     if attackers:
    #         for attacker_square in chess.scan_forward(attackers):
    #             piece = board.piece_at(attacker_square)
    #             print(f"Pole {chess.SQUARE_NAMES[square]} je napadeno figurou {board.piece_symbol(piece)} ({'bílá' if piece.color == chess.WHITE else 'černá'}) z pole {chess.SQUARE_NAMES[attacker_square]}")
    #     else:
    #         print(f"Pole {chess.SQUARE_NAMES[square]} není napadeno žádnou černou figurou")