/*  This file is part of epubgrep.
 *  Copyright © 2021 tastytea <tastytea@tastytea.de>
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published by
 *  the Free Software Foundation, version 3.
 *
 *  This program 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 Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "options.hpp"

#include "version.hpp"

#include <boost/program_options/options_description.hpp>
#include <boost/program_options/parsers.hpp>
#include <boost/program_options/variables_map.hpp>

#include <iostream>

namespace epubgrep
{

namespace po = boost::program_options;
using std::cout;

po::variables_map parse_options(int argc, char *argv[])
{
    po::options_description desc("Available options");
    // clang-format off
    desc.add_options()
        ("help", "Prints help information")
        ("version", "Prints version information")
        ("extended-regexp", "PATTERNS are extended regular expressions")
        ("perl-regexp", "PATTERNS are Perl regular expressions")
        ("ignore-case", "Ignore case distinctions in patterns and data")
    ;
    // clang-format on
    po::variables_map vm;
    po::store(po::parse_command_line(argc, argv, desc), vm);
    po::notify(vm);

    if (vm.count("help") != 0)
    {
        cout << "Usage: epubgrep [OPTION]… PATTERNS [FILE]…\n";
        cout << desc << '\n';
    }
    else if (vm.count("version") != 0)
    {
        cout << "epubgrep " << epubgrep::version << '\n';
        cout << "Copyright © 2021 tastytea <tastytea@tastytea.de>\n"
                "License AGPLv3: GNU AGPL version 3 "
                "<https://gnu.org/licenses/agpl.html>.\n"
                "This program comes with ABSOLUTELY NO WARRANTY. This is free "
                "software,\n"
                "and you are welcome to redistribute it under certain "
                "conditions.\n";
    }

    return vm;
}

} // namespace epubgrep