// Copyright (c) 2021 homuler
//
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file or at
// https://opensource.org/licenses/MIT.

namespace Mediapipe
{
  public static class Protobuf
  {
    public delegate void LogHandler(int level, string filename, int line, string message);
    public static readonly LogHandler DefaultLogHandler = LogProtobufMessage;

    public static void SetLogHandler(LogHandler logHandler)
    {
      UnsafeNativeMethods.google_protobuf__SetLogHandler__PF(logHandler).Assert();
    }

    /// <summary>
    ///   Reset the <see cref="LogHandler" />.
    ///   If <see cref="SetLogHandler" /> is called, this method should be called before the program exits.
    /// </summary>
    public static void ResetLogHandler()
    {
      UnsafeNativeMethods.google_protobuf__ResetLogHandler().Assert();
    }

    [AOT.MonoPInvokeCallback(typeof(LogHandler))]
    private static void LogProtobufMessage(int level, string filename, int line, string message)
    {
      switch (level)
      {
        case 1:
          {
            UnityEngine.Debug.LogWarning($"[libprotobuf WARNING {filename}:{line}] {message}");
            return;
          }
        case 2:
          {
            UnityEngine.Debug.LogError($"[libprotobuf ERROR {filename}:{line}] {message}");
            return;
          }
        case 3:
          {
            UnityEngine.Debug.LogError($"[libprotobuf FATAL {filename}:{line}] {message}");
            return;
          }
        default:
          {
            UnityEngine.Debug.Log($"[libprotobuf INFO {filename}:{line}] {message}");
            return;
          }
      }
    }
  }
}