// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.

using System;
using Microsoft.Extensions.Logging;

namespace Libuv.Internal
{
  /// <summary>
  /// Summary description for UvWriteRequest
  /// </summary>
  public class UvConnectRequest : UvRequest
  {
    private static readonly LibuvFunctions.uv_connect_cb _uv_connect_cb = UvConnectCb;

    private Action<UvConnectRequest, int, UvException, object> _callback;
    private object _state;

    public UvConnectRequest(ILibuvTrace logger) : base (logger)
    {
    }

    public override void Init(LibuvThread thread)
    {
      DangerousInit(thread.Loop);

      base.Init(thread);
    }

    public void DangerousInit(UvLoopHandle loop)
    {
      var requestSize = loop.Libuv.req_size(LibuvFunctions.RequestType.CONNECT);
      CreateMemory(
        loop.Libuv,
        loop.ThreadId,
        requestSize);
    }

    public void Connect(
      UvPipeHandle pipe,
      string name,
      Action<UvConnectRequest, int, UvException, object> callback,
      object state)
    {
      _callback = callback;
      _state = state;

      Libuv.pipe_connect(this, pipe, name, _uv_connect_cb);
    }

    private static void UvConnectCb(IntPtr ptr, int status)
    {
      var req = FromIntPtr<UvConnectRequest>(ptr);

      var callback = req._callback;
      req._callback = null;

      var state = req._state;
      req._state = null;

      UvException error = null;
      if (status < 0) req.Libuv.Check(status, out error);

      try
      {
        callback(req, status, error, state);
      }
      catch (Exception ex)
      {
        req._log.LogError(0, ex, "UvConnectRequest");
        throw;
      }
    }
  }
}