using System;
using System.Collections;
using System.IO;
using UnityEngine;
using UnityEngine.Networking;
using XRTool.Util;
using Newtonsoft.Json;
using TriLibCore;
using TriLibCore.Mappers;
using TriLibCore.Utils;

namespace ShadowStudio.Model
{
    public enum ArtState
    {
        UnLoad = -1,
        Loading = 0,
        Loaded = 1
    }
    /// <summary>
    /// 外部资源加载
    /// 可能是模型 zip文件
    /// 可能是图片
    /// 可能是视频，视频可在线播放，无需下载
    /// </summary>
    public class ExtralLoadHandler : ArtInstanceHandler
    {
        private ArtState artState = ArtState.UnLoad;
        private Action<float> loadPorcess;
        private Action<UnityEngine.Object> artLoaded;
        public override UnityEngine.Object InstanceArt()
        {
            return LoadCache;
        }
        /// <summary>
        /// 异步加载资源
        /// 此函数仅加载资源，不负责下载和解压
        /// 与异步获取icon不同，异步获取icon，当不存在文件时，会先下载资源再加载
        /// </summary>
        /// <param name="path"></param>
        /// <param name="process"></param>
        /// <param name="loaded"></param>
        /// <returns></returns>
        public override IEnumerator LoadAsyn(string path, Action<float> process, Action<UnityEngine.Object> loaded)
        {
            if (Info.ArtType == ArtType.Movies)
            {
                process?.Invoke(1);
                loaded(null);
            }
            else if (Info.ArtType == ArtType.Image)
            {
                Texture icon = GetIcon();
                yield return icon;
                if (icon)
                {
                    LoadCache = icon;
                    process?.Invoke(1);
                    loaded?.Invoke(LoadCache);
                }
                else
                {
                    GetIcon((tex) =>
                    {
                        LoadCache = tex;
                        process?.Invoke(1);
                        loaded?.Invoke(LoadCache);
                    });
                }
            }
            else if (Info.ArtType == ArtType.Model)
            {
                if (LoadCache)
                {
                    string cloneName = LoadCache.name;
                    LoadCache = GameObject.Instantiate(LoadCache);
                    LoadCache.name = cloneName;
                    loaded?.Invoke(LoadCache);
                    yield break;
                }
                if (artState == ArtState.Loading)
                {
                    loadPorcess += (p) => process?.Invoke(p);
                    artLoaded += (obj) =>
                    {
                        string cloneName = LoadCache.name;
                        LoadCache = GameObject.Instantiate(LoadCache);
                        LoadCache.name = cloneName;
                        loaded?.Invoke(LoadCache);
                        artLoaded = null;
                        loadPorcess = null;
                    };
                    yield break;
                }
                if (artState == ArtState.UnLoad)
                {
                    artState = ArtState.Loading;
                }
                string url = Info.Url;
                string serverPath = Path.Combine(BuildConfig.Instance.ServerUrl, url);
                string filePath = Path.Combine(localExtralPath, GetFilePath(url));
                try
                {
                    ///文件不存在，下载
                    ///模型的图例？是否下载呢？是个问题
                    if (!File.Exists(filePath))
                    {
                        TimerMgr.Instance.StartCoroutine(DataFileUtil.DownLoadDataAsync(serverPath, filePath, (isComplete, handler) =>
                        {
                            if (handler != null)
                            {
                                LoadInternal(filePath, loaded);
                            }
                            else
                            {
                                UnityLog.LogError(JsonConvert.SerializeObject(Info) + "frist load error!");
                            }
                        }, null, (all, cur) =>
                        {
                            DownProcess = cur;
                            process?.Invoke(cur);
                            loadPorcess?.Invoke(cur);
                        }));
                        //TimerMgr.Instance.StartCoroutine(DataFileUtil.DownLoadData(serverPath, filePath, (isComplete, handler) =>
                        // {
                        //     if (handler != null)
                        //     {
                        //         LoadInternal(filePath, loaded, handler.downloadHandler.data);
                        //     }
                        //     else
                        //     {
                        //         UnityLog.LogError(JsonConvert.SerializeObject(Info) + "frist load error!");
                        //     }
                        // }, null, (all, cur) =>
                        //  {
                        //      DownProcess = cur;
                        //      process?.Invoke(cur);
                        //      loadPorcess?.Invoke(cur);
                        //  }));
                    }
                    else
                    {
                        //TimerMgr.Instance.StartCoroutine(DataFileUtil.RequestDownData(filePath, (tmppath, handler) =>
                        //{
                        //    LoadInternal(filePath, loaded, handler.downloadHandler != null ? handler.downloadHandler.data : null);
                        //}, null, (all, cur) =>
                        // {
                        //     DownProcess = cur;
                        //     process?.Invoke(cur);
                        //     loadPorcess?.Invoke(cur);
                        // }));
                        LoadInternal(filePath, loaded);
                    }
                }
                catch
                {
                    loaded?.Invoke(null);
                    UnityLog.LogError(Info.ArtId + "load exception!");
                }
            }
            yield return null;
        }
        /// <summary>
        /// 加载模型
        /// </summary>
        /// <param name="filePath"></param>
        /// <param name="loaded"></param>
        private void LoadModel(string filePath, Action<UnityEngine.Object> loaded)
        {
            //using (var assetLoader = new AssetLoaderAsync())
            //{
            //    try
            //    {
            //        var assetLoaderOptions = AssetLoaderOptions.CreateInstance();
            //        assetLoaderOptions.RotationAngles = new Vector3(90f, 180f, 0f);
            //        assetLoaderOptions.AutoPlayAnimations = true;
            //        assetLoader.LoadFromFile(filePath, assetLoaderOptions, null, (loadedGameObject) =>
            //        {
            //            LoadCache = loadedGameObject;
            //            loaded?.Invoke(loadedGameObject);
            //        });
            //    }
            //    catch (Exception e)
            //    {
            //        Debug.LogError(e.ToString());
            //        loaded?.Invoke(null);
            //    }
            //}
        }
        private AssetLoaderOptions GetAssetLoaderOptions()
        {
            //var assetLoaderOptions = AssetLoaderOptions.CreateInstance();
            //assetLoaderOptions.DontLoadCameras = false;
            //assetLoaderOptions.DontLoadLights = false;
            //assetLoaderOptions.UseCutoutMaterials = false;
            //assetLoaderOptions.AddAssetUnloader = true;
            //return assetLoaderOptions;
            return null;
        }
        private void OnLoad(AssetLoaderContext assetLoaderContext)
        {
            //if (_loadedGameObject != null)
            //{
            //    Destroy(_loadedGameObject);
            //}
            //_loadedGameObject = assetLoaderContext.RootGameObject;
            //if (_loadedGameObject != null)
            //{
            //    Camera.main.FitToBounds(assetLoaderContext.RootGameObject, 2f);
            //    Debug.Log("Model loaded. Loading materials.");
            //}
            //else
            //{
            //    Debug.Log("Model materials could not be loaded.");
            //}
            //_loadModelButton.interactable = true;
        }
        /// <summary>
        ///  更改层级
        /// </summary>
        /// <param name="parentTransform"></param>
        public void ChangeLayerRecursively(Transform parentTransform)
        {
            // 修改父物体的层级
            parentTransform.gameObject.layer = LayerMask.NameToLayer("Arrow");

            // 遍历所有子物体，并递归调用ChangeLayerRecursively方法
            for (int i = 0; i < parentTransform.childCount; i++)
            {
                Transform childTransform = parentTransform.GetChild(i);
                ChangeLayerRecursively(childTransform);
            }
        }
        private void LoadInternal(string filename, Action<UnityEngine.Object> loaded)
        {
            TriLibModelLoad.Load(filename, (AssetLoaderContext ac) => {
                Debug.Log("模型加载完成");
            }, (AssetLoaderContext ac) => {
                Debug.Log("载材质加完成");
                ChangeLayerRecursively(ac.RootGameObject.transform);
                LoadCache = ac.RootGameObject;
                loaded?.Invoke(LoadCache);
                artLoaded?.Invoke(LoadCache);
                artState = ArtState.Loaded;

            }, (AssetLoaderContext ac, float f) => {

                Debug.Log("加载中==》" + f);
            }, (IContextualizedError error) => {

                loaded?.Invoke(null);
                artLoaded?.Invoke(null);
                artState = ArtState.UnLoad;
                UnityLog.LogError(Info.ArtId + "资源加载失败");
            });
            return;
            //var modelFileWithStream = FindModelFile();
            var modelFilename = Path.GetFileName(filename);
            var modelStream = File.OpenRead(filename);

            var _assetLoaderOptions = AssetLoader.CreateDefaultLoaderOptions();
            _assetLoaderOptions.TextureMapper = ScriptableObject.CreateInstance<FilePickerTextureMapper>();
            _assetLoaderOptions.ExternalDataMapper = ScriptableObject.CreateInstance<FilePickerExternalDataMapper>();
            _assetLoaderOptions.FixedAllocations.Add(_assetLoaderOptions.ExternalDataMapper);
            _assetLoaderOptions.FixedAllocations.Add(_assetLoaderOptions.TextureMapper);
            var _modelExtension = modelFilename != null ? FileUtils.GetFileExtension(modelFilename, false) : null;
            if (_modelExtension == "zip")
            {
                if (modelStream != null)
                {
                    //AssetLoaderZip.LoadModelFromZipStream(modelStream, _onLoad, _onMaterialsLoad, _onProgress, _onError, _wrapperGameObject, _assetLoaderOptions, _items, null);

                    AssetLoaderZip.LoadModelFromZipStream(modelStream, (t1) =>
                    {
                        LoadCache = t1.RootGameObject;
                        loaded?.Invoke(LoadCache);
                        artLoaded?.Invoke(LoadCache);
                        artState = ArtState.Loaded;
                    }, null, null,
                        (t2) =>
                        {
                            loaded?.Invoke(null);
                            artLoaded?.Invoke(null);
                            artState = ArtState.UnLoad;
                            UnityLog.LogError(Info.ArtId + "资源加载失败");
                        }, null, _assetLoaderOptions, null, null);
                }
                else
                {
                    //AssetLoaderZip.LoadModelFromZipFile(modelFilename, _onLoad, _onMaterialsLoad, _onProgress, _onError, _wrapperGameObject, _assetLoaderOptions, _items, null);
                    AssetLoaderZip.LoadModelFromZipFile(modelFilename, (t1) =>
                    {
                        LoadCache = t1.RootGameObject;
                        loaded?.Invoke(LoadCache);
                        artLoaded?.Invoke(LoadCache);
                        artState = ArtState.Loaded;
                    }, null, null, (t2) =>
                    {
                        loaded?.Invoke(null);
                        artLoaded?.Invoke(null);
                        artState = ArtState.UnLoad;
                        UnityLog.LogError(Info.ArtId + "资源加载失败");
                    }, null, _assetLoaderOptions, null, null);
                }
            }
            else
            {
                if (modelStream != null)
                {
                    //AssetLoader.LoadModelFromStream(modelStream, modelFilename, _modelExtension, _onLoad, _onMaterialsLoad, _onProgress, _onError, _wrapperGameObject, _assetLoaderOptions, _items);

                    AssetLoader.LoadModelFromStream(modelStream, modelFilename, _modelExtension, (t2) =>
                    {
                        LoadCache = t2.RootGameObject;
                        loaded?.Invoke(LoadCache);
                        artLoaded?.Invoke(LoadCache);
                        artState = ArtState.Loaded;
                    }, null, null, (t2) =>
                    {
                        loaded?.Invoke(null);
                        artLoaded?.Invoke(null);
                        artState = ArtState.UnLoad;
                        UnityLog.LogError(Info.ArtId + "资源加载失败");
                    }, null, _assetLoaderOptions, null);
                }
                else
                {
                    AssetLoader.LoadModelFromFile(modelFilename, (t2) =>
                    {
                        LoadCache = t2.RootGameObject;
                        loaded?.Invoke(LoadCache);
                        artLoaded?.Invoke(LoadCache);
                        artState = ArtState.Loaded;
                    }, null, null, (t2) =>
                    {
                        loaded?.Invoke(null);
                        artLoaded?.Invoke(null);
                        artState = ArtState.UnLoad;
                        UnityLog.LogError(Info.ArtId + "资源加载失败");
                    }, null, _assetLoaderOptions, null);
                }
            }
            //var assetLoaderOptions = AssetLoader.CreateDefaultLoaderOptions();
            //var assetLoaderFilePicker = AssetLoaderFilePicker.Create();
            //assetLoaderFilePicker.LoadModelFromFilePickerAsync("Select a Model file", (assetLoaderContext) =>
            //{
            //    LoadCache = assetLoaderContext.RootGameObject;
            //    loaded?.Invoke(LoadCache);
            //    artLoaded?.Invoke(LoadCache);
            //    artState = ArtState.Loaded;
            //}, OnMaterialsLoad, (t1, process) =>
            //{

            //}, (isfrist) => { }, (error) => { }, null, assetLoaderOptions);


            //AssetLoaderZip.LoadModelFromZipFile(modelFilename, _onLoad, _onMaterialsLoad, _onProgress, _onError, _wrapperGameObject, _assetLoaderOptions, _items, null);


            //_loadingTimer.Reset();
            //_loadingTimer.Start();
            //PreLoadSetup();
            //var assetLoaderOptions = GetAssetLoaderOptions();

            //using (var assetLoader = new AssetLoaderAsync())
            //{
            //    //assetLoader.OnMetadataProcessed += AssetLoader_OnMetadataProcessed;
            //    try
            //    {
            //        if (fileBytes != null && fileBytes.Length > 0)
            //        {
            //            var extension = FileUtils.GetFileExtension(filename);
            //            assetLoader.LoadFromMemoryWithTextures(fileBytes, extension, assetLoaderOptions, null, delegate (GameObject loadedGameObject)
            //            {
            //                LoadCache = loadedGameObject;
            //                loaded?.Invoke(LoadCache);
            //                artLoaded?.Invoke(LoadCache);
            //                artState = ArtState.Loaded;
            //            });
            //        }
            //        else if (!string.IsNullOrEmpty(filename))
            //        {
            //            assetLoader.LoadFromFileWithTextures(filename, assetLoaderOptions, null, delegate (GameObject loadedGameObject)
            //            {
            //                LoadCache = loadedGameObject;
            //                loaded?.Invoke(LoadCache);
            //                artLoaded?.Invoke(LoadCache);
            //                artState = ArtState.Loaded;
            //            });
            //        }
            //        else
            //        {
            //            loaded?.Invoke(null);
            //            artLoaded?.Invoke(null);
            //            artState = ArtState.UnLoad;
            //            throw new Exception("File not selected");
            //        }
            //    }
            //    catch
            //    {
            //        loaded?.Invoke(null);
            //        artLoaded?.Invoke(null);
            //        artState = ArtState.UnLoad;
            //        UnityLog.LogError(Info.ArtId + "资源加载失败");
            //    }
            //}

        }

        private void OnMaterialsLoad(AssetLoaderContext obj)
        {
            //throw new NotImplementedException();
        }
    }
}