/*
 * 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.Net;
using System.Net.Sockets;

namespace ProtonVPN.Vpn.PortMapping.UdpClients;

public class UdpClientWrapper : IUdpClientWrapper
{
    private UdpClient? _udpClient;
    private IPEndPoint? _endpoint;

    public void Start(IPEndPoint endpoint)
    {
        _udpClient = new();
        _endpoint = endpoint;
    }

    public void Send(byte[] data)
    {
        _udpClient?.Send(data, data.Length, _endpoint);
    }

    public byte[] Receive()
    {
        IPEndPoint? remoteEndpoint = _endpoint;
        return _udpClient?.Receive(ref remoteEndpoint) ?? [];
    }

    public void Stop()
    {
        try
        {
            _udpClient?.Close();
        }
        finally
        {
            _udpClient?.Dispose();
            _udpClient = null;
        }
    }

    public void Reset()
    {
        Stop();
        _udpClient = new();
    }

    public void Dispose()
    {
        Stop();
    }
}