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

namespace Game
{
    public enum LoadType
    {
        Editor,
        Single,
        Online
    }

    public class ResourceManager : ManagerBase, IResourceManager
    {
        private List<string> _packageName = new List<string>();
        private ResourcePackage _defaultPackage;
        private Dictionary<string, AssetHandle> _assetHandles = new Dictionary<string, AssetHandle>();
        private Dictionary<string, SceneHandle> _sceneHandles = new Dictionary<string, SceneHandle>();
        private Dictionary<string, GameObject> _gameObjects = new Dictionary<string, GameObject>();

        protected override void OnInit()
        {
            base.OnInit();
            YooAssets.Initialize();
            _defaultPackage = YooAssets.CreatePackage("DefaultPackage");
            YooAssets.SetDefaultPackage(_defaultPackage);
        }

        protected override void OnUpdate(float dateTime)
        {
            base.OnUpdate(dateTime);
        }

        public void LoadPackage(string packageName)
        {
            if (_packageName.Contains(packageName)) return;
            YooAssets.CreatePackage(packageName);
            _packageName.Add(packageName);
        }

        public void UnloadPackage(string packageName)
        {
            var resourcePackage = YooAssets.GetPackage(packageName);
            if (resourcePackage != null)
            {
                resourcePackage.UnloadUnusedAssets();
                YooAssets.DestroyPackage(packageName);
                _packageName.Remove(packageName);
            }
        }

        public async UniTask InitLoadModeAsync(LoadType _loadType)
        {
            switch (_loadType)
            {
                case LoadType.Editor:
#if UNITY_EDITOR
                    Debug.Log("EditorMode-Loading");
                    await InitializeYooAsset_Editor();
#endif
                    break;
                case LoadType.Single:
                    Debug.Log("SingleMode-Loading");
                    await InitializeYooAsset_Single();
                    break;
                case LoadType.Online:
                    break;
                default:
                    throw new ArgumentOutOfRangeException();
            }
        }

#if UNITY_EDITOR
        private async UniTask InitializeYooAsset_Editor()
        {
            var initParameters = new EditorSimulateModeParameters();
            var simulateManifestFilePath =
                EditorSimulateModeHelper.SimulateBuild(EDefaultBuildPipeline.BuiltinBuildPipeline, "DefaultPackage");
            initParameters.SimulateManifestFilePath = simulateManifestFilePath;
            await _defaultPackage.InitializeAsync(initParameters);
            Debug.Log("EditorMode-LoadFinish");
        }
#endif

        private async UniTask InitializeYooAsset_Single()
        {
            var initParameters = new OfflinePlayModeParameters();
            await _defaultPackage.InitializeAsync(initParameters);
            Debug.Log("SingleMode-LoadFinish");
        }

        // private IEnumerator InitializeYooAsset_Online()
        // {
        //     // 注意：GameQueryServices.cs 太空战机的脚本类，详细见StreamingAssetsHelper.cs
        //     string defaultHostServer = "http://127.0.0.1/CDN/Android/v1.0";
        //     string fallbackHostServer = "http://127.0.0.1/CDN/Android/v1.0";
        //     var initParameters = new HostPlayModeParameters();
        //     initParameters.BuildinQueryServices = new GameQueryServices();
        //     initParameters.DecryptionServices = new FileOffsetDecryption();
        //     initParameters.RemoteServices = new RemoteServices(defaultHostServer, fallbackHostServer);
        //     var initOperation = package.InitializeAsync(initParameters);
        //     yield return initOperation;
        //
        //     if (initOperation.Status == EOperationStatus.Succeed)
        //     {
        //         Debug.Log("资源包初始化成功！");
        //     }
        //     else
        //     {
        //         Debug.LogError($"资源包初始化失败：{initOperation.Error}");
        //     }
        // }

        public AssetHandle LoadAssetSync(string name)
        {
            if (_assetHandles.TryGetValue(name, out var assetHandle))
            {
                return assetHandle;
            }

            var loadAssetSync = YooAssets.LoadAssetSync(name);
            _assetHandles.Add(name, loadAssetSync);
            return loadAssetSync;
        }

        public GameObject LoadGameObjectSync(string name)
        {
            var loadAssetSync = LoadAssetSync(name);
            var assetObject = loadAssetSync.AssetObject as GameObject;
            var gameObject = Object.Instantiate(assetObject);

            return gameObject;
        }

        public GameObject LoadUIGameObjectSync(string name)
        {
            var loadAssetSync = LoadAssetSync(name);
            var assetObject = loadAssetSync.AssetObject as GameObject;
            var parent = GameObject.Find("Global/UICanvas").transform;

            var gameObject = Object.Instantiate(assetObject, parent);

            return gameObject;
        }

        public async UniTask LoadSceneAsync(string name, LoadSceneMode loadSceneMode = LoadSceneMode.Single,
            bool suspendLoad = false)
        {
            // if (_assetHandles.TryGetValue(name, out var assetHandle))
            // {
            //     return assetHandle;
            // }

            var loadSceneAsync = YooAssets.LoadSceneAsync(name, loadSceneMode, suspendLoad);
            _sceneHandles.Add(name, loadSceneAsync);
            await loadSceneAsync.Task;
            Debug.Log($"{name}场景加载成功！");
        }

        public async void UnloadSceneAsync(string name, LoadSceneMode loadSceneMode = LoadSceneMode.Single,
            bool suspendLoad = false)
        {
            if (_sceneHandles.TryGetValue(name, out var handle))
            {
                await handle.UnloadAsync().Task;
                Debug.Log($"{name}场景卸载成功！");
            }
        }

        public async UniTask<Object> LoadAssetAsync(string name)
        {
            if (_assetHandles.TryGetValue(name, out var assetHandle))
            {
                return assetHandle.AssetObject;
            }

            var loadAssetSync = YooAssets.LoadAssetAsync(name);
            await loadAssetSync.Task;
            _assetHandles.Add(name, loadAssetSync);
            return loadAssetSync.AssetObject;
        }

        public async UniTask<GameObject> LoadGameObjectAsync(string name)
        {
            var loadAssetSync = await LoadAssetAsync(name);
            var assetObject = loadAssetSync as GameObject;
            var gameObject = Object.Instantiate(assetObject);

            return gameObject;
        }

        public void Release(string name)
        {
            if (_assetHandles.TryGetValue(name, out var assetHandle))
            {
                assetHandle.Release();
            }
        }

        protected override void OnDispose()
        {
            base.OnDispose();
            while (_packageName.Count > 0)
            {
                var packageName = _packageName[0];
                UnloadPackage(packageName);
                _packageName.Remove(packageName);
            }

            // foreach (var handle in _sceneHandles.Values)
            // {
            //     UnloadSceneAsync(handle.SceneName);
            // }

            _sceneHandles = null;
            _packageName = null;
            _gameObjects = null;
            _assetHandles = null;
        }
    }

    // public class GO_S
    // {
    //     public string name;
    //     private AssetHandle AssetHandle;
    //     private GameObject go;
    //
    //     public GO_S(string name, AssetHandle assetHandle, GameObject go)
    //     {
    //         this.name = name;
    //         AssetHandle = assetHandle;
    //         this.go = go;
    //     }
    //
    //     public void Release()
    //     {
    //         AssetHandle.Release();
    //         GameObject.Destroy(go);
    //     }
    // }

    public interface IResourceManager
    {
        AssetHandle LoadAssetSync(string name);
        GameObject LoadGameObjectSync(string path);
        GameObject LoadUIGameObjectSync(string path);

        UniTask LoadSceneAsync(string name, LoadSceneMode loadSceneMode = LoadSceneMode.Single,bool suspendLoad = false);
    }
}