/***
    Copyright (C) 2021 J Reece Wilson (a/k/a "Reece"). All rights reserved.

    File: BlockCompressor.hpp
    Date: 2021-6-17
    Author: Reece
***/
#pragma once

namespace Aurora::Compression
{
    class BaseCompressionStream : public ICompressionStream
    {
    public:
        BaseCompressionStream(int bufferSize = 4096 * 4) : _outbuffer(bufferSize, true) {}
        
        virtual ~BaseCompressionStream() {}

        virtual bool Init(const AuSPtr<Aurora::IO::IStreamReader> &reader) = 0;
        virtual AuStreamReadWrittenPair_t Process(AuUInt32 len) = 0;
        virtual void ProcessFlush() = 0;


        virtual AuStreamReadWrittenPair_t Ingest(AuUInt32 bytesFromUnprocessedInputSource) override;
        virtual void Flush() override;
        virtual bool ReadByProcessedN(void * /*opt*/, AuUInt32 minimumDeflated) override;
        virtual bool ReadByProcessedN(void * /*opt*/, AuUInt32 minimumDeflated, AuStreamReadWrittenPair_t &pair, bool ingestUntilEOS = true) override;
        virtual bool GoBackByProcessedN(AuUInt32 offset) override;
        virtual bool GoForwardByProcessedN(AuUInt32 offset) override;

        /// @deprecated
        virtual AuUInt32 GetInternalBufferSize();

        bool Write(const void *a, AuUInt32 length);

    protected:
        Aurora::Memory::ByteBuffer _outbuffer;
        AuUInt32 _lastCount, _count;
    };
}