// 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
{
  public class UvTimerHandle : UvHandle
  {
    private static readonly LibuvFunctions.uv_timer_cb _uv_timer_cb = UvTimerCb;

    private Action<UvTimerHandle> _callback;

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

    public void Init(UvLoopHandle loop, Action<Action<IntPtr>, IntPtr> queueCloseHandle)
    {
      CreateHandle(
        loop.Libuv,
        loop.ThreadId,
        loop.Libuv.handle_size(LibuvFunctions.HandleType.TIMER),
        queueCloseHandle);

      _uv.timer_init(loop, this);
    }

    public void Start(Action<UvTimerHandle> callback, long timeout, long repeat)
    {
      _callback = callback;
      _uv.timer_start(this, _uv_timer_cb, timeout, repeat);
    }

    public void Stop()
    {
      _uv.timer_stop(this);
    }

    private static void UvTimerCb(IntPtr handle)
    {
      var timer = FromIntPtr<UvTimerHandle>(handle);

      try
      {
        timer._callback(timer);
      }
      catch (Exception ex)
      {
        timer._log.LogError(0, ex, nameof(UvTimerCb));
        throw;
      }
    }
  }
}