// Assets/Script/WebRtc/SignalingMessageHelper.cs

using System;
using System.Reflection;
using UnityEngine;

namespace Unity.RenderStreaming
{
    public static class SignalingMessageHelper
    {
        private static object _webSocketSignaling;
        private static MethodInfo _sendRawMessageMethod;

        static SignalingMessageHelper()
        {
            Initialize();
        }

        private static void Initialize()
        {
            try
            {
                var signalingManager = GameObject.FindObjectOfType<SignalingManager>();
                if (signalingManager == null)
                {
                    Debug.LogWarning("SignalingMessageHelper: 找不到 SignalingManager");
                    return;
                }

                var managerInternalField = typeof(SignalingManager).GetField("m_instance",
                    BindingFlags.NonPublic | BindingFlags.Instance);
                var managerInternal = managerInternalField.GetValue(signalingManager);

                if (managerInternal == null)
                {
                    Debug.LogWarning("SignalingMessageHelper: SignalingManager 内部实例为空");
                    return;
                }

                var signalingField = managerInternal.GetType().GetField("_signaling",
                    BindingFlags.NonPublic | BindingFlags.Instance);
                _webSocketSignaling = signalingField.GetValue(managerInternal);

                if (_webSocketSignaling == null)
                {
                    Debug.LogWarning("SignalingMessageHelper: WebSocketSignaling 实例为空");
                    return;
                }

                _sendRawMessageMethod = _webSocketSignaling.GetType().GetMethod("SendMessage");
                if (_sendRawMessageMethod == null) Debug.LogWarning("SignalingMessageHelper: 找不到 SendRawMessage 方法");
            }
            catch (Exception e)
            {
                Debug.LogError($"SignalingMessageHelper 初始化失败: {e.Message}");
            }
        }

        public static bool SendMessage(string message)
        {
            if (_webSocketSignaling == null || _sendRawMessageMethod == null)
            {
                Debug.LogError("SignalingMessageHelper 未正确初始化，请确保 WebSocketSignaling 已启动");
                return false;
            }

            try
            {
                _sendRawMessageMethod.Invoke(_webSocketSignaling, new[] { message });
                Debug.Log("消息已发送到服务端");
                return true;
            }
            catch (Exception e)
            {
                Debug.LogError($"发送消息失败: {e.Message}");
                return false;
            }
        }

        public static bool IsReady()
        {
            return _webSocketSignaling != null && _sendRawMessageMethod != null;
        }
    }
}