using System;
using System.Collections.Generic;
using Fantasy;
using Fantasy.Async;
using NBF.Fishing2;
using UnityEngine;

namespace NBF
{
    public class Game : MonoBehaviour
    {
        public static Game Instance { get; private set; }


        private static Scene _scene;
        public static Scene Main => _scene;

        private static event Action OnInitialized;
        public static event Action OnUpdate;
        public static event Action OnLateUpdate;
        public static event Action OnFixedUpdate;
        public static event Action OnApplicationQuitAction;
        public static event Action OnApplicationPauseAction;

        

        public static void SetInitCallback(GameObject root, Action callback = null)
        {
            if (Instance != null) return;
            root.AddComponent<Game>();
            OnInitialized += callback;
            // NBC_Fantasy_EntitySystemRegistrar
        }

        private void Awake()
        {
            Instance = this;
            // CameraConfig = Resources.Load<CameraScriptObject>(nameof(CameraConfig));
        }

        private void Start()
        {
            StartAsync().Coroutine();
        }

        private void Update()
        {
            OnUpdate?.Invoke();
        }

        private void LateUpdate()
        {
            OnLateUpdate?.Invoke();
        }

        private void FixedUpdate()
        {
            OnFixedUpdate?.Invoke();
        }

        private void OnApplicationQuit()
        {
            OnApplicationQuitAction?.Invoke();
        }

        private void OnApplicationPause(bool pauseStatus)
        {
            OnApplicationPauseAction?.Invoke();
        }

        private void OnDestroy()
        {
            _scene?.Dispose();
        }

        private async FTask StartAsync()
        {
            // 初始化框架
            var assemblies = AppDomain.CurrentDomain.GetAssemblies();
            List<System.Reflection.Assembly> loadAssemblies = new List<System.Reflection.Assembly>();
            foreach (var assembly in assemblies)
            {
                // 跳过系统程序集以提高性能（可选）
                if (IsSystemAssembly(assembly))
                    continue;
                loadAssemblies.Add(assembly);
            }

            // 1. 初始化 Fantasy 框架
            await Fantasy.Platform.Unity.Entry.Initialize();

            // 2. 创建一个 Scene (客户端场景)
            // Scene 是 Fantasy 框架的核心容器,所有功能都在 Scene 下运行
            // SceneRuntimeMode.MainThread 表示在 Unity 主线程运行
            _scene = await Scene.Create(SceneRuntimeMode.MainThread);
            // UI = _scene.AddComponent<UIComponent>();
            OnInitialized?.Invoke();
        }

        // 判断是否是系统程序集（可选优化）
        private static bool IsSystemAssembly(System.Reflection.Assembly assembly)
        {
            string assemblyName = assembly.FullName;
            return assemblyName.StartsWith("System") ||
                   assemblyName.StartsWith("Microsoft.") ||
                   assemblyName.StartsWith("UnityEngine") ||
                   assemblyName.StartsWith("UnityEditor") ||
                   assemblyName.StartsWith("mscorlib") ||
                   assemblyName.StartsWith("netstandard") ||
                   assemblyName.StartsWith("nunit.") ||
                   assemblyName.StartsWith("Unity.");
        }
    }
}