/*
 * Copyright (c) 2023 Proton AG
 *
 * This file is part of ProtonVPN.
 *
 * ProtonVPN is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * ProtonVPN 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with ProtonVPN.  If not, see <https://www.gnu.org/licenses/>.
 */

using System;
using System.Threading.Tasks;
using ProtonVPN.Common.Core.Extensions;
using ProtonVPN.Common.Legacy.Go;
using ProtonVPN.Vpn.LocalAgent;

namespace ProtonVPN.Vpn.PortScanning;

public class UdpPingClient
{
    private const int TIMEOUT_IN_MILLISECONDS = 3000;

    public async Task<bool> PingAsync(string ip, int port, string serverKeyBase64, Task timeoutTask)
    {
        try
        {
            bool result = await Task.Run(() =>
            {
                using GoString ipGoString = ip.ToGoString();
                using GoString serverKeyBase64GoString = serverKeyBase64.ToGoString();
                return PInvoke.Ping(ipGoString, port, serverKeyBase64GoString, TIMEOUT_IN_MILLISECONDS);
            }).WithTimeout(timeoutTask);

            return result;
        }
        catch (Exception e) when (e is TimeoutException or TaskCanceledException)
        {
            return false;
        }
    }
}