using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Text;
using System.Text.RegularExpressions;
using System.Web;
using Aliyun.OSS.Util;
using Common.Enum;
using Common.Util;
using Entity.Base;
using Entity.DbModel.System.SysBaseObject;
using Entity.Dto.Req;
using Furion.VirtualFileServer;
using HybirdFrameworkCore.Autofac.Attribute;
using HybirdFrameworkCore.Configuration;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using OnceMi.AspNetCore.OSS;
using Repository.System;
using Service.Mgr;
using SqlSugar;
using Yitter.IdGenerator;

namespace Service.System
{
    [Scope("SingleInstance")]
    public class SysFileServices : BaseServices<SysFile>
    {
        private readonly SysFileRepository _sysFileRep;
        private readonly SysUserRepository _sysUserRep;

        private readonly UploadOptions _uploadOptions;
        private readonly IOSSService _OSSService;

        private readonly string _imageType = ".jpg.png.bmp.gif.tif";

        public SysFileServices(
            SysUserRepository sysUserRepository,
            SysFileRepository sysFileRep,
            IOSSServiceFactory ossServiceFactory)
        {
            _sysUserRep = sysUserRepository;
            _sysFileRep = sysFileRep;

            _uploadOptions = new UploadOptions
            {
                Path = AppSettingsHelper.GetContent("Upload", "Path"),
                MaxSize = Convert.ToInt64(AppSettingsHelper.GetContent("Upload", "MaxSize")),
                ContentType = new List<string> { "image/jpg", "image/png", "image/jpeg", "image/gif", "image/bmp", "text/plain", "application/pdf", "application/msword", "application/vnd.ms-excel", "application/vnd.ms-powerpoint", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", "application/vnd.openxmlformats-officedocument.wordprocessingml.document", "video/mp4" },
                EnableMd5 = false,
            };

        }



        /// <summary>
        /// 上传头像 🔖
        /// </summary>
        /// <param name="file"></param>
        /// <returns></returns>
        [DisplayName("上传头像")]
        public async Task<SysFile> UploadAvatar([Required] IFormFile file, string path)
        {
            var sysFile = await HandleUploadFile(file, path, _imageType);
            var user = _sysUserRep.QueryByClause(u => u.Id == UserManager.UserId);
            await _sysUserRep.UpdateAsync(u => new SysUser() { Avatar = sysFile.Url }, u => u.Id == user.Id);
            return sysFile;
        }

        /// <summary>
        /// 获取文件分页列表 🔖
        /// </summary>
        /// <param name="input"></param>
        /// <returns></returns>
        [DisplayName("获取文件分页列表")]
        public async Task<SqlSugarPagedList<SysFile>> Page(PageFileReq input)
        {
            RefAsync<int> total = 0;
            var items = await _sysFileRep.QueryPageAsync(
               !string.IsNullOrWhiteSpace(input.FileName), u => u.FileName.Contains(input.FileName.Trim()),
               !string.IsNullOrWhiteSpace(input.StartTime.ToString()) && !string.IsNullOrWhiteSpace(input.EndTime.ToString()),
                            u => u.CreateTime >= input.StartTime && u.CreateTime <= input.EndTime,
                u => u.CreateTime, input.Page, input.PageSize, total);
            return SqlSugarPagedExtensions.CreateSqlSugarPagedList(items, total, input.Page, input.PageSize);
        }

        /// <summary>
        /// 上传文件 🔖
        /// </summary>
        /// <param name="file"></param>
        /// <param name="path"></param>
        /// <returns></returns>
        [DisplayName("上传文件")]
        public async Task<SysFile> UploadFile([Required] IFormFile file, [FromQuery] string? path)
        {
            return await HandleUploadFile(file, path);
        }

        /// <summary>
        /// 上传文件Base64
        /// </summary>
        /// <param name="strBase64"></param>
        /// <param name="fileName"></param>
        /// <param name="contentType"></param>
        /// <param name="path"></param>
        /// <returns></returns>
        private async Task<SysFile> UploadFileFromBase64(string strBase64, string fileName, string contentType, string? path)
        {
            byte[] fileData = Convert.FromBase64String(strBase64);
            var ms = new MemoryStream();
            ms.Write(fileData);
            ms.Seek(0, SeekOrigin.Begin);
            if (string.IsNullOrEmpty(fileName))
                fileName = $"{YitIdHelper.NextId()}.jpg";
            if (string.IsNullOrEmpty(contentType))
                contentType = "image/jpg";
            IFormFile formFile = new FormFile(ms, 0, fileData.Length, "file", fileName)
            {
                Headers = new HeaderDictionary(),
                ContentType = contentType
            };
            return await UploadFile(formFile, path);
        }

        /// <summary>
        /// 上传文件Base64 🔖
        /// </summary>
        /// <param name="input"></param>
        /// <returns></returns>
        [DisplayName("上传文件Base64")]
        [HttpPost]
        public async Task<SysFile> UploadFileFromBase64(UploadFileFromBase64Req input)
        {
            return await UploadFileFromBase64(input.FileDataBase64, input.FileName, input.ContentType, input.Path);
        }

        /// <summary>
        /// 上传多文件 🔖
        /// </summary>
        /// <param name="files"></param>
        /// <returns></returns>
        [DisplayName("上传多文件")]
        public async Task<List<SysFile>> UploadFiles([Required] List<IFormFile> files)
        {
            var filelist = new List<SysFile>();
            foreach (var file in files)
            {
                filelist.Add(await UploadFile(file, ""));
            }
            return filelist;
        }

        ///// <summary>
        ///// 根据文件Id或Url下载 🔖
        ///// </summary>
        ///// <param name="input"></param>
        ///// <returns></returns>
        //[DisplayName("根据文件Id或Url下载")]
        //public async Task<IActionResult> DownloadFile(FileReq input)
        //{
        //    var file = input.Id > 0 ? await GetFile(input) : await _sysFileRep.QueryByClauseAsync(u => u.Url == input.Url);
        //    var fileName = HttpUtility.UrlEncode(file.FileName, Encoding.GetEncoding("UTF-8"));
        //    if (_OSSProviderOptions.IsEnable)
        //    {
        //        var filePath = string.Concat(file.FilePath, "/", file.Id.ToString() + file.Suffix);
        //        var stream = await (await _OSSService.PresignedGetObjectAsync(file.BucketName.ToString(), filePath, 5)).GetAsStreamAsync();
        //        return new FileStreamResult(stream.Stream, "application/octet-stream") { FileDownloadName = fileName + file.Suffix };
        //    }
        //    else
        //    {
        //        var filePath = Path.Combine(file.FilePath, file.Id.ToString() + file.Suffix);
        //        var path = Path.Combine(App.WebHostEnvironment.WebRootPath, filePath);
        //        return new FileStreamResult(new FileStream(path, FileMode.Open), "application/octet-stream") { FileDownloadName = fileName + file.Suffix };
        //    }
        //}


        /// <summary>
        /// 更新文件 🔖
        /// </summary>
        /// <param name="input"></param>
        /// <returns></returns>
        [ApiDescriptionSettings(Name = "Update"), HttpPost]
        [DisplayName("更新文件")]
        public async Task<string> UpdateFile(FileReq input)
        {
            string result = "";
            var isExist = await _sysFileRep.QueryByClauseAsync(u => u.Id == input.Id);
            if (isExist == null)
                result = "文件不存在";
            bool updateResult = await _sysFileRep.UpdateAsync(u => new SysFile() { FileName = input.FileName }, u => u.Id == input.Id);
            if (updateResult)
            {
                result = "更新文件成功";
            }
            return result;
        }

        /// <summary>
        /// 获取文件
        /// </summary>
        /// <param name="input"></param>
        /// <returns></returns>
        private async Task<SysFile> GetFile([FromQuery] FileReq input)
        {
            var file = await _sysFileRep.QueryByClauseAsync(u => u.Id == input.Id);
            if (file==null)
            {
                //文件不存在
                return new SysFile();
            }
            return file;
        }

        /// <summary>
        /// 上传文件
        /// </summary>
        /// <param name="file">文件</param>
        /// <param name="savePath">路径</param>
        /// <param name="allowSuffix">允许格式：.jpg.png.gif.tif.bmp</param>
        /// <returns></returns>
        private async Task<SysFile> HandleUploadFile(IFormFile file, string savePath, string allowSuffix = "")
        {
            if (file == null)
                throw new ArgumentException($"文件不存在");//文件不存在

            // 判断是否重复上传的文件
            var sizeKb = (long)(file.Length / 1024.0); // 大小KB
            var fileMd5 = string.Empty;
            if (_uploadOptions.EnableMd5)
            {
                using (var fileStream = file.OpenReadStream())
                {
                    fileMd5 = OssUtils.ComputeContentMd5(fileStream, fileStream.Length);
                }
                /*
                 * Mysql8 中如果使用了 utf8mb4_general_ci 之外的编码会出错，尽量避免在条件里使用.ToString()
                 * 因为 Squsugar 并不是把变量转换为字符串来构造SQL语句，而是构造了CAST(123 AS CHAR)这样的语句，这样这个返回值是utf8mb4_general_ci，所以容易出错。
                 */
                var strSizeKb = sizeKb.ToString();
                var sysFile = await _sysFileRep.QueryByClauseAsync(u => u.FileMd5 == fileMd5 && (u.SizeKb == null || u.SizeKb == strSizeKb));
                if (sysFile != null) return sysFile;
            }

            var path = savePath;
            if (string.IsNullOrWhiteSpace(savePath))
            {
                path = _uploadOptions.Path;
                var reg = new Regex(@"(\{.+?})");
                var match = reg.Matches(path);
                match.ToList().ForEach(a =>
                {
                    var str = DateTime.Now.ToString(a.ToString().Substring(1, a.Length - 2)); // 每天一个目录
                    path = path.Replace(a.ToString(), str);
                });
            }

            // 验证文件类型
            if (!_uploadOptions.ContentType.Contains(file.ContentType))
                throw new ArgumentException($"不允许的文件类型");
            // 验证文件大小
            if (sizeKb > _uploadOptions.MaxSize)
                throw new ArgumentException($"文件超过允许大小");
            // 获取文件后缀
            var suffix = Path.GetExtension(file.FileName).ToLower(); // 后缀
            if (string.IsNullOrWhiteSpace(suffix))
            {
                var contentTypeProvider = FS.GetFileExtensionContentTypeProvider();
                suffix = contentTypeProvider.Mappings.FirstOrDefault(u => u.Value == file.ContentType).Key;
                // 修改 image/jpeg 类型返回的 .jpe 后缀
                if (suffix == ".jpe")
                    suffix = ".jpg";
            }
            if (string.IsNullOrWhiteSpace(suffix))
                throw new ArgumentException($"文件后缀错误");
            var newFile = new SysFile
            {
                //Id = YitIdHelper.NextId(),

                FileName = Path.GetFileNameWithoutExtension(file.FileName),
                Suffix = suffix,
                SizeKb = sizeKb.ToString(),

                FileMd5 = fileMd5,
            };

            var finalName = newFile.Id + suffix; // 文件最终名称

            string time = DateTime.Now.ToString("yyyyMMdd");

            var filePath = Path.Combine(savePath, time);

            if (!Directory.Exists(filePath))
                Directory.CreateDirectory(filePath);

            filePath = Path.Combine(filePath, finalName);


            // 使用FileStream保存文件
            using (var stream = new FileStream(filePath, FileMode.Create))
            {
                await file.CopyToAsync(stream);
            }
            newFile.FilePath = filePath;
            newFile.Url = AppSettingsHelper.GetContent("HttpContextRequest", "Scheme") + "/" + time + "/" + finalName;
            await _sysFileRep.InsertAsync(newFile);
            SysFile newAddFile = await _sysFileRep.QueryByClauseAsync(u => u.FilePath == filePath);
            if (newAddFile != null)
            {
                newFile.Id = newAddFile.Id;
                return newFile;
            }
            else
                return null;

        }
    }
}