package ru.fokinatorr.chess.game;

import reactor.core.publisher.Mono;
import ru.fokinatorr.chess.server.game.event.GameJoinedEvent;

/// Additional methods for a local (offline) chess game.
public interface LocalChessGameService extends ChessGameService {

    /// Undo a move. The resulting `Publisher` will signal when the event submission completes.
    Mono<Void> undoMove();

    /// Redo a move. The resulting `Publisher` will signal when the event submission completes.
    Mono<Void> redoMove();

    /// Returns a `Publisher` that completes without a value since local games can't have an opponent joining.
    /// @return an empty `Publisher`
    @Override
    default Mono<GameJoinedEvent> waitForOpponentToJoin() {
        return Mono.empty();
    }
}