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

    File: BlockDecompressor.cpp
    Date: 2021-6-17
    Author: Reece
***/
#include <Source/RuntimeInternal.hpp>
#include "Compression.hpp"
#include "BlockDecompressor.hpp"
#include "BaseStream.hpp"

#if defined(_AUHAS_ZSTD)
    #include "Compressors/ZSTDDecompressor.hpp"
#endif

#if defined(_AUHAS_ZLIB)
    #include "Compressors/DeflateDecompressor.hpp"
#endif

#if defined(_AUHAS_LZ4)
    #include "Compressors/LZ4Decompressor.hpp"
#endif

#if defined(_AUHAS_BZIP2)
    #include "Compressors/BZip2Decompressor.hpp"
#endif

namespace Aurora::Compression
{
    AUKN_SYM ICompressionStream *DecompressorNew(const AuSPtr<IO::IStreamReader> &reader, const DecompressInfo &ref)
    {
        DecompressInfo info = ref;
        BaseStream * ret{};
        AuInt8 bits;
        bool hasBits;

        switch (info.alg)
        {
        #if defined(_AUHAS_ZSTD)
        case ECompressionType::eZSTD:
            ret = _new ZSTDInflate(info);
            break;
        #endif
        case ECompressionType::eBZIP2:
        #if defined(_AUHAS_BZIP2)
            ret = _new BZIPInflate(info);
        #endif
            break;
        #if defined(_AUHAS_LZ4)
        case ECompressionType::eLZ4:
            ret = _new LZ4Inflate(info);
            break;
        #endif
        #if defined(_AUHAS_ZLIB)
        case ECompressionType::eDeflate:
        case ECompressionType::eZip:
        case ECompressionType::eGZip:
            
            hasBits = CompressionLevelFromExternalApi(info, bits);
            if (!hasBits && info.alg != ECompressionType::eZip)
            {
                return {};
            }

            ret = _new ZIPInflate(info, hasBits, bits);
            break;
        #endif
        default:
            ret = nullptr;
            break;
        }
        
        if (ret)
        {
            if (!ret->Init(reader))
            {
                delete ret;
                ret = nullptr;
            }
        }

        return ret;
    }

    AUKN_SYM void DecompressorRelease(ICompressionStream * stream)
    {
        AuSafeDelete<BaseStream *>(stream);
    }
}