using HybridCLR;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using Cysharp.Threading.Tasks;
using UnityEngine;
using YooAsset;

namespace Unity.Loader
{
    public class Loader
    {
        public List<string> aotDllNames = new List<string>()
        {
            LoaderAssetConst.Assets_DemoGame_GameRes_AotDlls_mscorlib_dll_bytes,
            LoaderAssetConst.Assets_DemoGame_GameRes_AotDlls_Sirenix_Utilities_dll_bytes,
            LoaderAssetConst.Assets_DemoGame_GameRes_AotDlls_UniTask_dll_bytes,
            LoaderAssetConst.Assets_DemoGame_GameRes_AotDlls_YooAsset_dll_bytes,
            LoaderAssetConst.Assets_DemoGame_GameRes_AotDlls_UnityEngine_CoreModule_dll_bytes,
        };

        private Dictionary<string, TextAsset> dlls = new Dictionary<string, TextAsset>();
        private Dictionary<string, TextAsset> aotDlls = new Dictionary<string, TextAsset>();

        public async UniTask DownloadAsync()
        {
            if (true) // Dll
            {
                string dllName = LoaderAssetConst.Assets_DemoGame_GameRes_Codes_Hotfix_dll_bytes;
                // Editor环境下，HotUpdate.dll.bytes已经被自动加载，不需要加载，重复加载反而会出问题。
#if !UNITY_EDITOR
            string hotfixDll = dllName;
            var loadAssetAsync = await ResourcesComponent.Instance.LoadAssetAsync<TextAsset>(hotfixDll);
            this.dlls.Add(hotfixDll, loadAssetAsync);
#else
                // Editor下无需加载，直接查找获得HotUpdate程序集
//            Assembly hotUpdateAss = System.AppDomain.CurrentDomain.GetAssemblies().First(a => a.GetName().Name == "Hotfix");

                string hotfixDll = "Hotfix";
                Assembly hotUpdateAss = System.AppDomain.CurrentDomain.GetAssemblies().First(a => a.GetName().Name == hotfixDll);
#endif
            }

            if (true) // AOTDll
            {
#if !UNITY_EDITOR
            foreach (var dll in this.aotDllNames)
            {
                var loadAssetAsync = await ResourcesComponent.Instance.LoadAssetAsync<TextAsset>(dll);
                this.aotDlls.Add(dll, loadAssetAsync);
            }
#endif
            }

            await UniTask.Yield();
        }

        public void OnStart(GameObject go, EPlayMode playMode)
        {
            foreach (var kv in this.aotDlls) // 先加载aot内容，避免报错
            {
                TextAsset textAsset = kv.Value;
//                Debug.Log($":{kv.Key}. text: {textAsset.text}");
                var errorCode = RuntimeApi.LoadMetadataForAOTAssembly(textAsset.bytes, HomologousImageMode.SuperSet);
                Debug.Log($"LoadMetadataForAOTAssembly:{kv.Key}. ret: {errorCode}");
            }

            string dllName = LoaderAssetConst.Assets_DemoGame_GameRes_Codes_Hotfix_dll_bytes;
            // Editor环境下，HotUpdate.dll.bytes已经被自动加载，不需要加载，重复加载反而会出问题。
#if !UNITY_EDITOR
        var dllAsset = this.dlls[dllName];
        Assembly hotUpdateAss = Assembly.Load(dllAsset.bytes);
#else
            // Editor下无需加载，直接查找获得HotUpdate程序集
            Assembly hotUpdateAss = System.AppDomain.CurrentDomain.GetAssemblies().First(a => a.GetName().Name == "Hotfix");
#endif

            var type = hotUpdateAss.GetType("ZC.GameEntry");

            this.Create();

            object[] pa = new object[] { go, playMode };
            type.GetMethod("Init").Invoke(null, pa);
        }

        /// <summary>
        /// 创建实例，防止引用缺失
        /// </summary>
        private void Create()
        {
            // ？？
            SystemInfo info = new SystemInfo();
            //
            Compass compass = new Compass();
            Input input = new Input();
            //
            Debug.Log($"info : {info.GetType()}");
        }
    }
}