/*****************************************************************************
 *
 * 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
 *
 *****************************************************************************/

// mapnik
#include <mapnik/utils.hpp>
#include <mapnik/util/fs.hpp>

// boost
#include <boost/filesystem/operations.hpp>  // for absolute, exists, etc
#include <boost/filesystem/path.hpp>    // for path, operator/

// stl
#include <stdexcept>

namespace mapnik {

namespace util {

    bool exists(std::string const& filepath)
    {
#ifdef _WINDOWS
        return boost::filesystem::exists(mapnik::utf8_to_utf16(filepath));
#else
        return boost::filesystem::exists(filepath);
#endif
    }

    bool is_directory(std::string const& filepath)
    {
#ifdef _WINDOWS
        return boost::filesystem::is_directory(mapnik::utf8_to_utf16(filepath));
#else
        return boost::filesystem::is_directory(filepath);
#endif
    }

    bool is_regular_file(std::string const& filepath)
    {
#ifdef _WINDOWS
        return boost::filesystem::is_regular_file(mapnik::utf8_to_utf16(filepath));
#else
        return boost::filesystem::is_regular_file(filepath);
#endif
    }

    bool remove(std::string const& filepath)
    {
#ifdef _WINDOWS
        return boost::filesystem::remove(mapnik::utf8_to_utf16(filepath));
#else
        return boost::filesystem::remove(filepath);
#endif
    }

    bool is_relative(std::string const& filepath)
    {

#ifdef _WINDOWS
        boost::filesystem::path child_path(mapnik::utf8_to_utf16(filepath));
#else
        boost::filesystem::path child_path(filepath);
#endif
        return (! child_path.has_root_directory() && ! child_path.has_root_name());
    }

    std::string make_relative(std::string const& filepath, std::string const& base)
    {
#ifdef _WINDOWS
        boost::filesystem::path absolute_path(mapnik::utf8_to_utf16(base));
#else
        boost::filesystem::path absolute_path(base);
#endif
        // support symlinks
        if (boost::filesystem::is_symlink(absolute_path))
        {
            absolute_path = boost::filesystem::read_symlink(absolute_path);
        }
        return boost::filesystem::absolute(absolute_path.parent_path() / filepath).string();
    }

    std::string make_absolute(std::string const& filepath, std::string const& base)
    {
        // TODO - normalize is now deprecated, use make_preferred?
        return boost::filesystem::absolute(boost::filesystem::path(base)/filepath).string();
    }

    std::string dirname(std::string const& filepath)
    {
        boost::filesystem::path bp(filepath);
        return bp.parent_path().string();
    }

    std::string basename(std::string const& value)
    {
        boost::filesystem::path bp(value);
        return bp.filename().string();
    }

    std::vector<std::string> list_directory(std::string const& dir)
    {
        std::vector<std::string> listing;
        boost::filesystem::directory_iterator end_itr;
#ifdef _WINDOWS
        std::wstring wide_dir(mapnik::utf8_to_utf16(dir));
        for (boost::filesystem::directory_iterator itr(wide_dir); itr != end_itr; ++itr)
        {
            listing.emplace_back(mapnik::utf16_to_utf8(itr->path().wstring()));
        }
#else
        for (boost::filesystem::directory_iterator itr(dir); itr != end_itr; ++itr)
        {
            listing.emplace_back(itr->path().string());
        }
#endif
        return listing;
    }


} // end namespace util

} // end namespace mapnik