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#pragma once

#include "public.h"

#include <util/generic/maybe.h>
#include <util/generic/ptr.h>

class IInputStream;

namespace NYT::NYson {
struct IYsonConsumer;
} // namespace NYT::NYson

namespace NYson {
    //////////////////////////////////////////////////////////////////////////////// 

    class TYsonParser { 
    public: 
        TYsonParser( 
            NYT::NYson::IYsonConsumer* consumer,
            IInputStream* stream, 
            EYsonType type = ::NYson::EYsonType::Node,
            bool enableLinePositionInfo = false, 
            TMaybe<ui64> memoryLimit = Nothing()); 

        ~TYsonParser(); 

        void Parse(); 

    private: 
        class TImpl; 
        THolder<TImpl> Impl; 
    }; 

    //////////////////////////////////////////////////////////////////////////////// 

    class TStatelessYsonParser { 
    public: 
        TStatelessYsonParser( 
            NYT::NYson::IYsonConsumer* consumer,
            bool enableLinePositionInfo = false, 
            TMaybe<ui64> memoryLimit = Nothing()); 

        ~TStatelessYsonParser(); 

        void Parse(const TStringBuf& data, EYsonType type = ::NYson::EYsonType::Node);

    private: 
        class TImpl; 
        THolder<TImpl> Impl; 
    }; 

    //////////////////////////////////////////////////////////////////////////////// 

    class TYsonListParser { 
    public: 
        TYsonListParser( 
            NYT::NYson::IYsonConsumer* consumer,
            IInputStream* stream, 
            bool enableLinePositionInfo = false, 
            TMaybe<ui64> memoryLimit = Nothing()); 

        ~TYsonListParser(); 

        bool Parse(); // Returns false, if there is no more list items 

    private: 
        class TImpl; 
        THolder<TImpl> Impl; 
    }; 

    //////////////////////////////////////////////////////////////////////////////// 

    void ParseYsonStringBuffer( 
        const TStringBuf& buffer, 
        NYT::NYson::IYsonConsumer* consumer,
        EYsonType type = ::NYson::EYsonType::Node,
        bool enableLinePositionInfo = false, 
        TMaybe<ui64> memoryLimit = Nothing()); 

    //////////////////////////////////////////////////////////////////////////////// 

} // namespace NYson