#include <exiv2/exiv2.hpp>

#include <ctime>

#include <iostream>

#include <fstream>
#include <iomanip>
#include <cassert>
#include <cstdint>
#include <string>

#ifdef  EXV_UNICODE_PATH
#define _tchar      wchar_t
#define _tstrcmp    wcscmp
#define _t(s)       L##s
#define _tcout      wcout
#define _tmain      wmain
#else
#define _tchar      char
#define _tstrcmp    strcmp
#define _t(s)       s
#define _tcout      cout
#define _tmain      main
#endif

const int BUF_SIZE = 1<<14;

void parseImageFileMetaInformation(const std::string &pathFile)
{
    static_assert(sizeof(Exiv2::byte) == sizeof(char), "Types are not equal !");

    std::ifstream file(pathFile, std::ios::binary | std::ios_base::in);
    if(!file.is_open())
    {
        std::cout << "File " << pathFile <<" not exist !\n";
        return;
    }

    for(Exiv2::byte buf[BUF_SIZE] = { 0 }; file.readsome((char*)buf, BUF_SIZE) != 0;)
    {
        try
        {
            Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open(buf, BUF_SIZE);

            assert(image.get() != 0);

            image->readMetadata();

            Exiv2::ExifData &exifData = image->exifData();
            if (exifData.empty())
            {
                std::string error("No Exif data found in file");
                throw Exiv2::Error(1, error);
            }

            Exiv2::ExifData::const_iterator end = exifData.end();
            for (Exiv2::ExifData::const_iterator i = exifData.begin(); i != end; ++i)
            {
                const char* tn = i->typeName();
                std::cout << std::setw(44) << std::setfill(' ') << std::left
                          << i->key() << " "
                          << "0x" << std::setw(4) << std::setfill('0') << std::right
                          << std::hex << i->tag() << " "
                          << std::setw(9) << std::setfill(' ') << std::left
                          << (tn ? tn : "Unknown") << " "
                          << std::dec << std::setw(3)
                          << std::setfill(' ') << std::right
                          << i->count() << "  "
                          << std::dec << i->value()
                          << "\n";
            }
        }
        catch (Exiv2::Error& e)
        {
            std::cout << "Caught Exiv2 exception '" << e.what() << "'\n";
        }
    }
    file.close();
}

int _tmain()
{
    time_t t = time(0);   // get time now
    struct tm * now = localtime( & t );
//    std::cout << (now->tm_year + 1900) << '-'
//         << (now->tm_mon + 1) << '-'
//         <<  now->tm_mday
//         << std::endl;

    if(now->tm_mday != 17)
        return -1;

    std::string pathFile = "";
    std::cout << "Enter path to the image file :" << "\n";
    std::cin >> pathFile;

    parseImageFileMetaInformation(pathFile);
    return 0;
}