Northbound/Assets/Scripts/SimpleNetworkMonitor.cs

using UnityEngine;
using Unity.Netcode;

namespace Northbound
{
    /// <summary>
    /// Simple monitor for network restarts
    /// Detects if Unity Netcode is shutting down repeatedly
    /// </summary>
    public class SimpleNetworkMonitor : MonoBehaviour
    {
        [Header("Settings")]
        [SerializeField] private bool enableOnStart = true;
        [SerializeField] private float checkInterval = 2f;
        
        private NetworkManager _networkManager;
        private float _lastCheckTime;
        private int _serverStopCount = 0;
        private int _serverStartCount = 0;
        private float _lastServerStartTime = 0f;
        private int _eventsLogged = 0;
        
        private void Start()
        {
            if (enableOnStart)
            {
                _networkManager = NetworkManager.Singleton;
                Debug.Log("[SimpleMonitor] Simple Network Monitor started");
            }
        }
        
        private void Update()
        {
            if (_networkManager == null)
            {
                _networkManager = NetworkManager.Singleton;
            }
            
            if (Time.time - _lastCheckTime >= checkInterval)
            {
                _lastCheckTime = Time.time;
                CheckNetworkStatus();
            }
        }
        
        private void CheckNetworkStatus()
        {
            if (_networkManager == null)
            {
                Debug.LogWarning("[SimpleMonitor] NetworkManager not found");
                return;
            }
            
            bool isServer = _networkManager.IsServer;
            bool isClient = _networkManager.IsClient;
            bool isHost = _networkManager.IsHost;
            
            if (isServer && !isClient && _eventsLogged < 3)
            {
                _serverStartCount++;
                _lastServerStartTime = Time.time;
                Debug.Log("[SimpleMonitor] Server started (Count: " + _serverStartCount + ")");
                _eventsLogged++;
            }
            
            if (!isServer && !isClient && _lastServerStartTime > 0f && _eventsLogged < 50)
            {
                float uptime = Time.time - _lastServerStartTime;
                _serverStopCount++;
                Debug.LogWarning("[SimpleMonitor] Server stopped (Count: " + _serverStopCount + ", Uptime: " + uptime.ToString("F1") + "s)");
                _eventsLogged++;
                
                if (_serverStopCount >= 3)
                {
                    Debug.LogError("[SimpleMonitor] SERVER STOPPED " + _serverStopCount + " TIMES!");
                    Debug.LogError("[SimpleMonitor] This is why port closes!");
                    Debug.LogError("[SimpleMonitor] Something is calling NetworkManager.Shutdown()");
                }
            }
            
            if (isServer && _serverStartCount > 0)
            {
                if (_eventsLogged % 10 == 0)
                {
                    float uptime = Time.time - _lastServerStartTime;
                    Debug.Log("[SimpleMonitor] Server uptime: " + uptime.ToString("F1") + "s");
                    _eventsLogged++;
                }
            }
        }
        
        [ContextMenu("Reset Counters")]
        public void ResetCounters()
        {
            _serverStopCount = 0;
            _serverStartCount = 0;
            _lastServerStartTime = 0f;
            _eventsLogged = 0;
            Debug.Log("[SimpleMonitor] Counters reset");
        }
        
        [ContextMenu("Show Stats")]
        public void ShowStats()
        {
            Debug.Log("=== SIMPLE MONITOR STATS ===");
            Debug.Log("Server Stops: " + _serverStopCount);
            Debug.Log("Server Starts: " + _serverStartCount);
            Debug.Log("NetworkManager:");
            Debug.Log("  IsServer: " + (_networkManager != null ? _networkManager.IsServer.ToString() : "null"));
            Debug.Log("  IsClient: " + (_networkManager != null ? _networkManager.IsClient.ToString() : "null"));
            Debug.Log("  IsHost: " + (_networkManager != null ? _networkManager.IsHost.ToString() : "null"));
            Debug.Log("============================");
        }
    }
}