evershade/Assets/Scripts/GameInit.cs

using FishNet.Managing;
using FishNet.Object;
using FishNet.Transporting;
using Managers;
using UnityEngine;

public class GameInit : MonoBehaviour
{
    [SerializeField] private GameObject systemsManagerPrefab;
    [SerializeField] private GameObject networkManagerPrefab;
    [SerializeField] private NetworkObject gameManagerPrefab;

    private NetworkManager _networkManager;

    public static GameInit Instance { get; set; }


    private void Awake()
    {
        InitializeSystemsManager();
        InitializeNetworkManager();
        _networkManager = FindObjectOfType<NetworkManager>();

        if (_networkManager == null) Debug.LogError("NetworkManager not found");

        // ensure this is singleton
        if (Instance == null)
        {
            Instance = this;
            DontDestroyOnLoad(gameObject);
        }
        else
        {
            Destroy(gameObject);
        }
    }

    private void Start()
    {
        if (_networkManager != null)
        {
            _networkManager.ServerManager.OnServerConnectionState += OnServerReady;
            _networkManager.ClientManager.OnClientConnectionState += OnClientReady;
        }
    }


    private void OnDestroy()
    {
        if (_networkManager != null)
        {
            _networkManager.ServerManager.OnServerConnectionState -= OnServerReady;
            _networkManager.ClientManager.OnClientConnectionState -= OnClientReady;
        }
    }

    private void OnServerReady(ServerConnectionStateArgs args)
    {
        Debug.Log("Server Connection State Changed " + args.ConnectionState);
        // if (args.ConnectionState == LocalConnectionState.Started) InitializeGameManager();
    }


    private void OnClientReady(ClientConnectionStateArgs args)
    {
        // InitializeGameManager();
    }

    private void InitializeSystemsManager()
    {
        if (FindObjectOfType<SaveManager>() == null)
        {
            var systemsManagerInstance = Instantiate(systemsManagerPrefab);
            DontDestroyOnLoad(systemsManagerInstance);
        }
    }

    private void InitializeNetworkManager()
    {
        if (FindObjectOfType<NetworkManager>() == null)
        {
            var networkManagerInstance = Instantiate(networkManagerPrefab);
            DontDestroyOnLoad(networkManagerInstance);
        }
    }

    public void InitializeGameManager()
    {
        Debug.Log("Initializing GameManager...");
        if (FindObjectOfType<GameManager>() == null)
        {
            // check if gameManagerPrefab is null
            if (gameManagerPrefab == null)
            {
                Debug.LogError("GameManager prefab not found");
                return;
            }

            var gameManagerInstance = Instantiate(gameManagerPrefab);

            // check if instance was created
            if (gameManagerInstance == null)
            {
                Debug.LogError("GameManager instance not found");
                return;
            }

            _networkManager.ServerManager.Spawn(gameManagerInstance);
            // gameManagerInstance.SetActive(true);
        }
    }

    public NetworkObject GetGameManagerPrefab()
    {
        if (gameManagerPrefab == null) Debug.LogError("GameManager prefab not found");

        return gameManagerPrefab;
    }
}