#ifndef FILESTREAM_HPP
#define FILESTREAM_HPP

#include <string>
#include <memory>
#include <stdio.h>
#include "Athena/IStreamReader.hpp"

namespace Athena
{
namespace io
{
class FileReader : public IStreamReader
{
public:
    FileReader(const std::string& filename, atInt32 cacheSize = (32 * 1024));
    FileReader(const std::wstring& filename, atInt32 cacheSize = (32 * 1024));
    virtual ~FileReader();

    inline std::string filename() const
    {
#if _WIN32
        return utility::wideToUtf8(m_filename);
#else
        return m_filename;
#endif
    }

    inline std::wstring wfilename() const
    {
#if _WIN32
        return m_filename;
#else
        return utility::utf8ToWide(m_filename);
#endif
    }

    void open();
    void close();
    inline bool isOpen() const
    {return m_fileHandle != NULL;}
    bool save();
    void seek(atInt64 pos, SeekOrigin origin = SeekOrigin::Current);
    atUint64 position() const;
    atUint64 length() const;
    atUint64 readUBytesToBuf(void* buf, atUint64 len);

    void setCacheSize(const atInt32 blockSize);
    FILE* _fileHandle() {return m_fileHandle;}
protected:
#if _WIN32
    std::wstring m_filename;
#else
    std::string  m_filename;
#endif
    FILE*        m_fileHandle;
    std::unique_ptr<atUint8[]>    m_cacheData;
    atInt32      m_blockSize;
    atInt32      m_curBlock;
    atUint64     m_offset;
};
} // io
} // Athena

#ifndef FILEREADER_BASE
#define FILEREADER_BASE() \
private: \
    typedef Athena::io::FileReader base

#endif // FILEREADER_BASE

#endif // FILESTREAM_HPP