/*****************************************************************************
 *
 * This file is part of Mapnik (c++ mapping toolkit)
 *
 * Copyright (C) 2014 Artem Pavlenko
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 *****************************************************************************/

#include <mapnik/image.hpp>
#include <mapnik/image_reader.hpp>
#include <mapnik/image_util.hpp>
#include <mapnik/tiff_io.hpp>

#include <fstream>

namespace mapnik {

image::image(image_data_any && data) noexcept
    : data_(std::move(data)) {}

void image::set_data(image_data_any && data)
{
    data_ = std::move(data);
}

image image::read_from_file(std::string const& filename)
{
    std::unique_ptr<image_reader> reader(get_image_reader(filename));
    if (reader)
    {
        unsigned w = reader->width();
        unsigned h = reader->height();
        image_data_any data = reader->read(0, 0, w, h);
        return image(std::move(data));
    }
    else
    {
        return image();
    }
}
/*
namespace detail {

struct save_to_file_visitor
{
    save_to_file_visitor(std::string const& filename, std::string const& format)
        : filename_(filename),
          format_(format) {}

    void operator() (image_data_rgba8 const& data) const
    {
        save_to_file(data,filename_, format_);
    }

    void operator() (image_data_gray16 const& data) const
    {
        if (format_ == "tiff") // only TIFF supported
        {
            std::ofstream file (filename_.c_str(), std::ios::out| std::ios::trunc|std::ios::binary);
            if (file)
            {
                tiff_config config;
                save_as_tiff(file, data, config);
            }
            else throw ImageWriterException("Could not write file to " + filename_ );
        }
        else
        {
            throw std::runtime_error("Error: saving gray16 image as " + format_  + " is not supported");
        }
    }

    template <typename T>
    void operator() (T const& data) const
    {
        throw std::runtime_error("Error: saving " + std::string(typeid(data).name()) + " as " + format_  + " is not supported");
    }

    std::string const& filename_;
    std::string const& format_;
};

}*/

void image::save_to_file(std::string const& filename, std::string const& format)
{
    mapnik::save_to_file(data_, filename, format);
    //util::apply_visitor(detail::save_to_file_visitor(filename, format), data_);
}

}