using Cysharp.Threading.Tasks;
using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;
using YooAsset;

namespace AOT
{
    /// <summary>
    /// Addressable的资源管理器（只用于启动游戏时更新）
    /// </summary>
    public class YooAssetManager : Base
    {
        static YooAssetManager m_instance;
        public static YooAssetManager instance
        {
            get
            {
                if (m_instance == null)
                    m_instance = new YooAssetManager();
                return m_instance;
            }
        }
        public Func<UniTask> onStart;
        public bool isFinish = false;
        public Action onFinish;

        private static byte downloadIndex = 0;

        PatchOperation operation;

        #region InnerClass

        [Serializable]
        private class DownloadContent
        {
            public List<string> catalogs = new List<string>();
        }

        #endregion

        #region FieldsAndProperties

        //记录在playerPres里的需要下载的catalogs的ID
        const string DOWNLOAD_CATALOGS_ID = "DownloadCatalogs";

        #endregion

        #region API

        public static async UniTask<AssetHandle> LoadAssetHandle<TObject>(string path) where TObject : UnityEngine.Object
        {
            Debug.Log("####### YooAssets.LoadAssetAsync  T = " + typeof(TObject) + "  path = " + path);

            //return await Addressables.LoadAssetAsync<TObject>(path);

            AssetHandle handle = YooAssets.LoadAssetAsync<TObject>(path);
            await handle.Task;
            if (handle.Status == EOperationStatus.Succeed)
                return handle;
            else throw new Exception($"{path} 加载失败:{handle.LastError}");
        }

        public static async UniTask<TObject> LoadAsset<TObject>(string path) where TObject : UnityEngine.Object
        {
            Debug.Log("####### YooAssets.LoadAssetAsync  T = " + typeof(TObject) + "  path = " + path);

            //return await Addressables.LoadAssetAsync<TObject>(path);

            AssetHandle handle = YooAssets.LoadAssetAsync<TObject>(path);
            await handle.Task;
            if (handle.Status == EOperationStatus.Succeed)
                return handle.AssetObject as TObject;
            else throw new Exception($"{path} 加载失败:{handle.LastError}");
        }

        public static async UniTask<TObject> LoadAssembliesAsset<TObject>(string path) where TObject : UnityEngine.Object
        {
            Debug.Log("####### YooAssets.LoadAssetAsync  T = " + typeof(TObject) + "  path = " + path);

            //return await Addressables.LoadAssetAsync<TObject>(path);
            var scriptPackage = YooAssets.GetPackage("ScriptPackage");
            AssetHandle handle = scriptPackage.LoadAssetAsync<TObject>(path, 0);
            //AssetHandle handle = YooAssets.LoadAssetAsync<TObject>(path);
            await handle.Task;
            if (handle.Status == EOperationStatus.Succeed)
                return handle.AssetObject as TObject;
            else throw new Exception($"{path} 加载失败:{handle.LastError}");
        }

        //public void UnloadAsset(UnityEngine.Object asset)
        //{
        //    if (asset != null)
        //        Addressables.Release(asset);
        //}

        /// <summary>
        /// YooAsset 初始化流程（初始化、热更新、释放）
        /// </summary>
        /// <returns></returns>

        public static async UniTask YooInit(EPlayMode playMode)
        {
            // 初始化资源系统
            YooAssets.Initialize();
            //Debug.Log("AAAAAAA####  " + Application.persistentDataPath);

            // 开始补丁更新流程
            await ToDownLoadNext(playMode, async () =>
            {
                // 设置默认的资源包
                var gamePackage = YooAssets.GetPackage("DefaultPackage");
                YooAssets.SetDefaultPackage(gamePackage);
                if (YooAssetManager.instance.onStart != null)
                    await YooAssetManager.instance.onStart.Invoke();

                YooAssetManager.instance.isFinish = true;
                YooAssetManager.instance.onFinish?.Invoke();
            });
        }


        private static async UniTask ToDownLoadNext(EPlayMode playMode, Action onFinish)
        {
            if (downloadIndex >= AppConst_AOT.yoo_Package_Info.packages.Count)
            {
                onFinish();
                return;
            }
            var package = AppConst_AOT.yoo_Package_Info.packages[downloadIndex];

            Log($"<color=blue>开始更新 ：{package} </color>");
            // 开始补丁更新流程

            instance.operation = new PatchOperation(package.name, package.version, package.isBuildinFileSystem, playMode);
            YooAssets.StartOperation(instance.operation);
            await instance.operation.Task;

            downloadIndex++;
            await ToDownLoadNext(playMode, onFinish);
        }

        public static async UniTask ChangeScene(string scenePath)
        {
            //string curName = SceneManager.GetActiveScene().name;
            //bool suspendLoad = false;
            SceneHandle handle = YooAssets.LoadSceneAsync(scenePath, LoadSceneMode.Single, LocalPhysicsMode.None);
            await handle.Task;
            handle.ActivateScene();

            SceneManager.SetActiveScene(handle.SceneObject);
            // 卸载当前场景
            //string curName = SceneManager.GetActiveScene().name;
            //await SceneManager.UnloadSceneAsync(scenePath);
        }

        public static IEnumerator ChangeScene()
        {
            const string START_SCENE_NAME = "Assets/Art/Scenes/main.unity";
            var sceneMode = UnityEngine.SceneManagement.LoadSceneMode.Additive;
            //var physicsMode = LocalPhysicsMode.None;
            SceneHandle handle = YooAssets.LoadSceneAsync(START_SCENE_NAME, sceneMode, LocalPhysicsMode.None);
            yield return handle;
            Debug.Log($"Scene name is {handle.SceneObject.name}");
        }

        #endregion
    }
}