using System;
using System.Collections.Generic;
using System.IO;
using Infrastructure;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using OpenAuth.Repository.Domain;
using OpenAuth.Repository.Interface;

namespace OpenAuth.App
{
 /// <summary>
 /// 文件
 /// </summary>
 public class FileApp : BaseApp<UploadFile>
 {
 private ILogger<FileApp> _logger;
 private string _filePath;
 private string _dbFilePath; //数据库中的文件路径
 private string _dbThumbnail; //数据库中的缩略图路径

 public FileApp( IOptions<AppSetting> setOptions, IUnitWork unitWork, IRepository<UploadFile> repository, ILogger<FileApp> logger)
 :base(unitWork, repository)
 {
 _logger = logger;
 _filePath = setOptions.Value.UploadPath;
 if (string.IsNullOrEmpty(_filePath))
 {
 _filePath = AppContext.BaseDirectory;
 }
 }

 public List<UploadFile> Add(IFormFileCollection files)
 {
 var result = new List<UploadFile>();
 foreach (var file in files)
 {
 result.Add(Add(file));
 }

 return result;
 }

 public UploadFile Add(IFormFile file)
 {
 if (file != null)
 {
 _logger.LogInformation("收到新文件: " + file.FileName);
 _logger.LogInformation("收到新文件: " + file.Length);
 }
 else
 {
 _logger.LogWarning("收到新文件为空");
 }
 if (file != null && file.Length > 0 && file.Length < 10485760)
 {
 using (var binaryReader = new BinaryReader(file.OpenReadStream()))
 {
 var fileName = Path.GetFileName(file.FileName);
 var data = binaryReader.ReadBytes((int)file.Length);
 UploadFile(fileName, data);

 var filedb = new UploadFile
 {
 FilePath = _dbFilePath,
 Thumbnail = _dbThumbnail,
 FileName = fileName,
 FileSize = file.Length,
 FileType = Path.GetExtension(fileName),
 Extension = Path.GetExtension(fileName)
 };
 Repository.Add(filedb);
 return filedb;
 }
 }
 else
 {
 throw new Exception("文件过大");
 }
 }

 private void UploadFile(string fileName, byte[] fileBuffers)
 {
 string folder = DateTime.Now.ToString("yyyyMMdd");

 //判断文件是否为空
 if (string.IsNullOrEmpty(fileName))
 {
 throw new Exception("文件名不能为空");
 }

 //判断文件是否为空
 if (fileBuffers.Length < 1)
 {
 throw new Exception("文件不能为空");
 }

 var uploadPath = _filePath + "/" + folder + "/";
 _logger.LogInformation("文件写入:" + uploadPath);
 if (!Directory.Exists(uploadPath))
 {
 Directory.CreateDirectory(uploadPath);
 }

 var ext = Path.GetExtension(fileName).ToLower();
 string newName = GenerateId.GenerateOrderNumber() + ext;

 using (var fs = new FileStream(uploadPath + newName, FileMode.Create))
 {
 fs.Write(fileBuffers, 0, fileBuffers.Length);
 fs.Close();

 //生成缩略图
 if (ext.Contains(".jpg") || ext.Contains(".jpeg") || ext.Contains(".png") || ext.Contains(".bmp") || ext.Contains(".gif"))
 {
 string thumbnailName = GenerateId.GenerateOrderNumber() + ext;
 ImgHelper.MakeThumbnail(uploadPath + newName, uploadPath + thumbnailName);
 _dbThumbnail = folder + "/" + thumbnailName;
 }


 _dbFilePath = folder + "/" + newName;
 }
 }
 }
}