using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Reflection;
using System.Threading.Tasks;
using TriLibCore;
using TriLibCore.SFB;
using UnityEngine;
using UnityEngine.Networking;
using UnityEngine.SceneManagement;

namespace ZXL.Helper
{
    public static class AssetHelper
    {
        private static string _rootPath;
        static string _assetsRootFolder;
        static string _sceneRootFolder;
        static string _cacheRootFolder;

        static AssetHelper()
        {
            _rootPath = $"{Application.dataPath}/{Application.productName}";
            _assetsRootFolder = _rootPath + "/Assets";
            _sceneRootFolder = _rootPath + "/Scenes";
            _cacheRootFolder = _rootPath + "/Cache";

            if (!Directory.Exists(_rootPath))
                Directory.CreateDirectory(_rootPath);
            if (!Directory.Exists(_assetsRootFolder))
                Directory.CreateDirectory(_assetsRootFolder);
            if (!Directory.Exists(_sceneRootFolder))
                Directory.CreateDirectory(_sceneRootFolder);
            if (!Directory.Exists(_cacheRootFolder))
                Directory.CreateDirectory(_cacheRootFolder);
        }

        #region xiazai

        public static async Task PushFileWithLoadToScene(GameObject parent)
        {
            var list = await OpenFilePushAsync();
            if (list.Count > 0)
            {
                var fileInfo = new FileInfo(list[0].Name);
                Debug.Log("Selected file: " + list[0].Name);

                var directoryName = fileInfo.DirectoryName.Split("\\")[^1];
                Debug.Log(directoryName);
                string savePathWithName = Path.Combine(_assetsRootFolder, directoryName, fileInfo.Name);
                var result = await DownloadModelAsync(fileInfo.FullName, savePathWithName);

                if (result)
                {
                    await LoadInternalModelToSceneAsync(savePathWithName, null, null, parent);
                }
            }
        }

        /// <summary>
        /// 打开选择文件弹框
        /// </summary>
        static async Task<IList<ItemWithStream>> OpenFilePushAsync()
        {
            var paths = StandaloneFileBrowser.OpenFilePanel("Open File", "", "", false);
            return paths;
        }

        /// <summary>
        /// 下载模型内容并返回模型数据
        /// </summary>
        /// <param name="fileUrl"></param>
        /// <param name="savePathWithName"></param>
        /// <returns></returns>
        static async Task<bool> DownloadModelAsync(string fileUrl, string savePathWithName)
        {
            UnityWebRequest request = UnityWebRequest.Get(fileUrl);
            request.SendWebRequest();
            while (true)
            {
                if (request.isDone)
                {
                    byte[] results = request.downloadHandler.data;
                    // 通过模型数据写入本地
                    FileInfo file = new FileInfo(savePathWithName);
                    if (file.Directory != null) file.Directory.Create();
                    Stream sw;
                    sw = file.Create();
                    sw.Write(results, 0, results.Length);
                    sw.Close();
                    sw.Dispose();
                    return true;
                }
                else if (request.isNetworkError)
                {
                    Debug.Log("Download Error:" + request.error);
                    return false;
                }
                else
                {
                }

                await Task.Delay(100);
            }
        }

        /// <summary>
        /// 加载外部模型到场景中
        /// </summary>
        /// <param name="title"></param>
        /// <param name="onProgress"></param>
        /// <param name="onBeginLoad"></param>
        /// <param name="parent"></param>
        static async Task LoadExternalModelToSceneAsync(string title, Action<AssetLoaderContext, float> onProgress,
            Action<bool> onBeginLoad, GameObject parent)
        {
            var defaultLoaderOptions = AssetLoader.CreateDefaultLoaderOptions();
            var filePicker = AssetLoaderFilePicker.Create();
            bool isLoadFinished = false;

            if (onProgress != null)
            {
                onProgress += OnProgress;
                filePicker.LoadModelFromFilePickerAsync(title, null,
                    null, onProgress, onBeginLoad, null, parent, defaultLoaderOptions);
                // AssetLoader.LoadModelFromFile(path, null, null, onProgress, null, parent, defaultLoaderOptions);
            }
            else
            {
                filePicker.LoadModelFromFilePickerAsync(title, null,
                    null, OnProgress, onBeginLoad, null, parent, defaultLoaderOptions);
            }

            void OnProgress(AssetLoaderContext assetLoaderContext, float progress)
            {
                if (progress >= 1)
                    isLoadFinished = true;
            }

            while (!isLoadFinished)
            {
                await Task.Delay(100);
            }

            Debug.Log("LoadModelToScene Finish !!");
        }

        /// <summary>
        /// 加载内部模型到场景中
        /// </summary>
        /// <param name="path">模型路径</param>
        /// <param name="onProgress">进度条更新</param>
        /// <param name="onBeginLoad">开始加载</param>
        /// <param name="parent">模型实例化父节点</param>
        static async Task LoadInternalModelToSceneAsync(string path, Action<AssetLoaderContext, float> onProgress,
            Action<bool> onBeginLoad, GameObject parent)
        {
            var defaultLoaderOptions = AssetLoader.CreateDefaultLoaderOptions();
            bool isLoadFinished = false;

            if (onProgress != null)
            {
                onProgress += OnProgress;
                AssetLoader.LoadModelFromFile(path, null, null, onProgress, null, parent, defaultLoaderOptions);
            }
            else
            {
                AssetLoader.LoadModelFromFile(path, null, null, OnProgress, null, parent, defaultLoaderOptions);
            }

            void OnProgress(AssetLoaderContext assetLoaderContext, float progress)
            {
                if (progress >= 1)
                    isLoadFinished = true;
            }

            while (!isLoadFinished)
            {
                await Task.Delay(100);
            }

            Debug.Log("LoadModelToScene Finish !!");
        }

        #endregion
    }
}