uciengine.h

/*
    This file is part of Cute Chess.

    Cute Chess is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    Cute Chess is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with Cute Chess.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef UCIENGINE_H
#define UCIENGINE_H

#include "chessengine.h"
#include <QVarLengthArray>


class LIB_EXPORT UciEngine : public ChessEngine
{
    Q_OBJECT

    public:
        UciEngine(QObject* parent = nullptr);

        // Inherited from ChessEngine
        virtual void endGame(const Chess::Result& result);
        virtual void makeMove(const Chess::Move& move);
        virtual void makeBookMove(const Chess::Move& move);
        virtual QString protocol() const;
        virtual void startPondering();
        virtual void clearPonderState();

    protected:
        // Inherited from ChessEngine
        virtual bool sendPing();
        virtual void sendStop();
        virtual void sendQuit();
        virtual void startProtocol();
        virtual void startGame();
        virtual void startThinking();
        virtual void parseLine(const QString& line);
        virtual void sendOption(const QString& name, const QVariant& value);
        virtual bool isPondering() const;
        
    private:
        enum PonderState
        {
            NotPondering,
            Pondering,
            PonderHit
        };

        static QStringRef parseUciTokens(const QStringRef& first,
                         const QString* types,
                         int typeCount,
                         QVarLengthArray<QStringRef>& tokens,
                         int& type);
        void parseInfo(const QVarLengthArray<QStringRef>& tokens,
                   int type,
                   MoveEvaluation* eval);
        void parseInfo(const QStringRef& line);
        EngineOption* parseOption(const QStringRef& line);
        void addVariantsFromOption(const EngineOption* option);
        void setVariant(const QString& variant);
        QString positionString();
        void sendPosition();
        void setPonderMove(const QString& moveString);
        QString directPv(const QVarLengthArray<QStringRef>& tokens);
        QString sanPv(const QVarLengthArray<QStringRef>& tokens);
        
        QString m_variantOption;
        QString m_startFen;
        QString m_moveStrings;
        bool m_useDirectPv;
        // Write buffer for messages that will be flushed to the engine
        // after it sends a "bestmove"
        QStringList m_bmBuffer;
        bool m_sendOpponentsName;
        bool m_canPonder;
        PonderState m_ponderState;
        Chess::Move m_ponderMove;
        QString m_ponderMoveSan;
        int m_movesPondered;
        int m_ponderHits;
        bool m_ignoreThinking;
        bool m_rePing;
        MoveEvaluation m_currentEval;
        QStringList m_comboVariants;
};

#endif // UCIENGINE_H