/*

Copyright (c) 2016-2020, Arvid Norberg
All rights reserved.

You may use, distribute and modify this code under the terms of the BSD license,
see LICENSE file.
*/

#include <iostream>
#include <thread>
#include <chrono>

#include <libtorrent/session.hpp>
#include <libtorrent/session_params.hpp>
#include <libtorrent/add_torrent_params.hpp>
#include <libtorrent/torrent_handle.hpp>
#include <libtorrent/alert_types.hpp>
#include <libtorrent/magnet_uri.hpp>

int main(int argc, char const* argv[]) try
{
	if (argc != 2) {
		std::cerr << "usage: " << argv[0] << " <magnet-url>" << std::endl;
		return 1;
	}
	lt::settings_pack p;
	p.set_int(lt::settings_pack::alert_mask, lt::alert_category::status
		| lt::alert_category::error);
	lt::session ses(p);

	lt::add_torrent_params atp = lt::parse_magnet_uri(argv[1]);
	atp.save_path = "."; // save in current dir
	lt::torrent_handle h = ses.add_torrent(std::move(atp));

	for (;;) {
		std::vector<lt::alert*> alerts;
		ses.pop_alerts(&alerts);

		for (lt::alert const* a : alerts) {
			std::cout << a->message() << std::endl;
			// if we receive the finished alert or an error, we're done
			if (lt::alert_cast<lt::torrent_finished_alert>(a)) {
				goto done;
			}
			if (lt::alert_cast<lt::torrent_error_alert>(a)) {
				goto done;
			}
		}
		std::this_thread::sleep_for(std::chrono::milliseconds(200));
	}
	done:
	std::cout << "done, shutting down" << std::endl;
}
catch (std::exception& e)
{
	std::cerr << "Error: " << e.what() << std::endl;
}