//using Application.Domain.Entities;
//using FaceRecognitionDotNet;
//using Infrastructure.Data;
//using Infrastructure.Extensions;
//using Microsoft.AspNetCore.Hosting;
//using Microsoft.Extensions.DependencyInjection;
//using System;
//using System.Collections.Concurrent;
//using System.IO;
//using System.Linq;
//using System.Runtime.InteropServices;

//namespace UserCenter.Services
//{
//    public class FaceRecognitionService : IDisposable
//    {
//        private readonly IServiceProvider _serviceProvider;
//        private readonly IWebHostEnvironment _env;
//        private readonly FaceRecognition _faceRecognition;
//        private readonly ConcurrentDictionary<string, FaceEncoding> _faces = new ConcurrentDictionary<string, FaceEncoding>();

//        public FaceRecognitionService(IServiceProvider serviceProvider)
//        {
//            this._serviceProvider = serviceProvider;
//            using var scope = this._serviceProvider.CreateScope();
//            this._env = scope.ServiceProvider.GetService<IWebHostEnvironment>();
//            this._faceRecognition = FaceRecognition.Create(Path.Combine(this._env.WebRootPath, "face"));
//            var userRepo = scope.ServiceProvider.GetService<IRepository<User>>();
//            var users = userRepo.ReadOnlyTable().Where(o => o.FaceImage != null).ToList();
//            foreach (var user in users)
//            {
//                if (!string.IsNullOrEmpty(user.FaceImage))
//                {
//                    try
//                    {
//                        var faceEndoding = this.GetFaceImageEncoding(user.FaceImage);
//                        this._faces.TryAdd(user.UserName, faceEndoding);
//                    }
//                    catch (Exception ex)
//                    {
//                        ex.PrintStack();
//                    }
//                }
//            }
//        }

//        private FaceEncoding GetFaceImageEncoding(string faceImage)
//        {
//            var faceImagePath = Path.Combine(this._env.WebRootPath, faceImage.TrimStart('/'));
//            Console.WriteLine(faceImage);
//            using var img = FaceRecognition.LoadImageFile(faceImagePath);
//            var faceEncodings = this._faceRecognition.FaceEncodings(img).ToArray();
//            if (faceEncodings.Length == 0)
//            {
//                throw new Exception($"cann't find face");
//            }
//            else if (faceEncodings.Length > 1)
//            {
//                throw new Exception($"find too many faces");
//            }
//            return faceEncodings.FirstOrDefault();
//        }

//        public string FindFace(System.Drawing.Bitmap bitmap)
//        {
//            var userName = "";
//            var data = this.GetBytes(bitmap);
//            using (var faceImage = FaceRecognition.LoadImage(data, bitmap.Height, bitmap.Width, 3))
//            {
//                var encodings = this._faceRecognition.FaceEncodings(faceImage).ToArray();
//                if (encodings.Length > 0)
//                {
//                    var encoding = encodings.First();
//                    foreach (var item in this._faces)
//                    {
//                        if (FaceRecognition.CompareFace(item.Value, encoding, 0.4))
//                        {
//                            userName = item.Key;
//                            Console.WriteLine($"find user:{userName}");
//                            break;
//                        }
//                    }
//                }
//                else
//                {
//                    Console.WriteLine("can't find face from image");
//                }
//                foreach (var encoding in encodings)
//                {
//                    encoding.Dispose();
//                }
//            }
//            return userName;
//        }

//        public void AddFace(string userName, string faceImage)
//        {
//            this._faces.TryAdd(userName, this.GetFaceImageEncoding(faceImage));
//        }

//        public void UpdateFace(string userName, string faceImage)
//        {
//            this.RemoveFace(userName);
//            this.AddFace(userName, faceImage);
//        }

//        public void RemoveFace(string userName)
//        {
//            this._faces.TryRemove(userName, out FaceEncoding face);
//            face.Dispose();
//        }

//        public byte[] GetBytes(System.Drawing.Bitmap bitmap)
//        {
//            var array = new byte[bitmap.Width * bitmap.Height * 3];
//            var data = bitmap.LockBits(new System.Drawing.Rectangle(0, 0, bitmap.Width, bitmap.Height),
//                System.Drawing.Imaging.ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
//            Marshal.Copy(data.Scan0, array, 0, array.Length);
//            bitmap.UnlockBits(data);
//            return array;
//        }

//        public void Dispose()
//        {
//            foreach (var item in this._faces)
//            {
//                item.Value?.Dispose();
//            }
//            this._faceRecognition.Dispose();
//        }
//    }
//}