// ***************************************************************** -*- C++ -*-

// remotetest.cpp

// Tester application for testing remote i/o.

// It makes some modifications on the metadata of remote file, reads new metadata from that file

// and reset the metadata back to the original status.

#include <exiv2/exiv2.hpp>

#include <iostream>

#include <iomanip>

#include <cassert>

int main(int argc, char* const argv[])

try {

    if (argc < 2) {

        std::cout << "Usage: " << argv[0] << " file {--nocurl | --curl}\n\n";

        return 1;

    }

    bool useCurlFromExiv2TestApps = true;

    for ( int a = 1 ; a < argc ; a++ ) {

        std::string arg(argv[a]);

        if (arg == "--nocurl")  useCurlFromExiv2TestApps = false;

        else if (arg == "--curl") useCurlFromExiv2TestApps = true;

    }

    std::string file(argv[1]);

    // set/add metadata

    std::cout << "Modify the metadata ...\n";

    Exiv2::ExifData exifData;

    exifData["Exif.Photo.UserComment"]  = "Hello World";           // AsciiValue

    exifData["Exif.Image.Software"]     = "Exiv2";                 // AsciiValue

    exifData["Exif.Image.Copyright"]    = "Exiv2";                 // AsciiValue

    exifData["Exif.Image.Make"]         = "Canon";                 // AsciiValue

    exifData["Exif.Canon.OwnerName"]    = "Tuan";                  // UShortValue

    exifData["Exif.CanonCs.LensType"]   = uint16_t(65535);         // LongValue

    Exiv2::Value::AutoPtr v = Exiv2::Value::create(Exiv2::asciiString);

    v->read("2013:06:09 14:30:30");

    Exiv2::ExifKey key("Exif.Image.DateTime");

    exifData.add(key, v.get());

    Exiv2::Image::AutoPtr writeTest = Exiv2::ImageFactory::open(file, useCurlFromExiv2TestApps);

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

    writeTest->setExifData(exifData);

    writeTest->writeMetadata();

    // read the result to make sure everything fine

    std::cout << "Print out the new metadata ...\n";

    Exiv2::Image::AutoPtr readTest = Exiv2::ImageFactory::open(file, useCurlFromExiv2TestApps);

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

    readTest->readMetadata();

    Exiv2::ExifData &exifReadData = readTest->exifData();

    if (exifReadData.empty()) {

        std::string error(argv[1]);

        error += ": No Exif data found in the file";

        throw Exiv2::Error(Exiv2::kerErrorMessage, error);

    }

    Exiv2::ExifData::const_iterator end = exifReadData.end();

    for (Exiv2::ExifData::const_iterator i = exifReadData.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";

    }

    // del, reset the metadata

    std::cout << "Reset ...\n";

    exifReadData["Exif.Photo.UserComment"]  = "Have a nice day";           // AsciiValue

    exifReadData["Exif.Image.Software"]     = "Exiv2.org";                 // AsciiValue

    exifReadData["Exif.Image.Copyright"]    = "Exiv2.org";                 // AsciiValue

    key = Exiv2::ExifKey("Exif.Image.Make");

    Exiv2::ExifData::iterator pos = exifReadData.findKey(key);

    if (pos == exifReadData.end()) throw Exiv2::Error(Exiv2::kerErrorMessage, "Exif.Image.Make not found");

    exifReadData.erase(pos);

    key = Exiv2::ExifKey("Exif.Image.DateTime");

    pos = exifReadData.findKey(key);

    if (pos == exifReadData.end()) throw Exiv2::Error(Exiv2::kerErrorMessage, "Exif.Image.DateTime not found");

    exifReadData.erase(pos);

    key = Exiv2::ExifKey("Exif.Canon.OwnerName");

    pos = exifReadData.findKey(key);

    if (pos == exifReadData.end()) throw Exiv2::Error(Exiv2::kerErrorMessage, "Exif.Canon.OwnerName not found");

    exifReadData.erase(pos);

    key = Exiv2::ExifKey("Exif.CanonCs.LensType");

    pos = exifReadData.findKey(key);

    if (pos == exifReadData.end()) throw Exiv2::Error(Exiv2::kerErrorMessage, "Exif.CanonCs.LensType not found");

    exifReadData.erase(pos);

    readTest->setExifData(exifReadData);

    readTest->writeMetadata();

    return 0;

}

catch (Exiv2::AnyError& e) {

    std::cout << "Caught Exiv2 exception '" << e << "'\n";

    return -1;

}