/***
    Copyright (C) 2022 J Reece Wilson (a/k/a "Reece"). All rights reserved.

    File: IOAdapterAsyncStream.hpp
    Date: 2022-6-6
    Author: Reece
***/
#pragma once

namespace Aurora::IO
{
    struct IAsyncStreamReader : IStreamReader
    {
        /**
         * @brief Optional advanced use case.
         *        Begins work given caller provided memory
         * @return
        */
        virtual EStreamError BeginRead(const AuSPtr<Memory::MemoryViewWrite> &internalView) = 0;
        
        /**
         * @brief Optional advanced use case.
         *        Dequeues work done by begin read
         * @return 
        */
        virtual EStreamError Dequeue(AuUInt reqLength, Memory::MemoryViewWrite &out) = 0;
    };

    struct IAsyncStreamAdapter
    {
        virtual bool SetFlushOnWrite(bool value) = 0;

        virtual void   ReserveBuffer(AuUInt length) = 0;

        virtual AuUInt GetReadOffset() = 0;
        virtual AuUInt SetReadOffset(AuUInt offset) = 0;

        virtual AuUInt GetWriteOffset() = 0;
        virtual AuUInt SetWriteOffset(AuUInt offset) = 0;
        
        virtual AuSPtr<IAsyncStreamReader> ToStreamReader() = 0;
        virtual AuSPtr<IStreamWriter> ToStreamWriter() = 0;

        virtual AuSPtr<IIOWaitableItem> ToWaitable() = 0;
        
        virtual bool Reset() = 0;
    };

    AUKN_SYM AuSPtr<IAsyncStreamAdapter> NewAsyncStreamAdapter(const AuSPtr<IAsyncTransaction> &transaction, bool isStream);
}