//using HRM.BO;
//using Microsoft.AspNetCore.Http;
//using System;
//using System.Collections.Generic;
//using System.Linq;
//using System.Net;
//using System.Net.Http;
//using System.Security.Principal;
//using System.Text;
//using System.Threading;
//using System.Threading.Tasks;
//using System.Web;

//namespace HRM.UI.Components
//{
//    public class AuthenticationHandler : DelegatingHandler
//    {
//        private readonly IEmpMobileService _EmpMobileService;
//        IEnumerable<string> authHeaderValues = null;
//        protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
//        {
//            try
//            {
//                request.Headers.TryGetValues("Authorization", out authHeaderValues);
//                if (authHeaderValues == null)
//                {
//                    var response = request.CreateResponse(HttpStatusCode.Forbidden, new CustomMessage() { Caption = EnumExceptionType.Error.ToFriendlyString(), Message = "Access Forbidden.Contact to system Administrator." });
//                    var tsc = new TaskCompletionSource<HttpResponseMessage>();
//                    tsc.SetResult(response);
//                    return tsc.Task;
//                }

//                var tokens = authHeaderValues.FirstOrDefault();
//                tokens = tokens.Replace("Basic", "").Trim();

//                if (!string.IsNullOrEmpty(tokens))
//                {
//                    byte[] data = Convert.FromBase64String(tokens);
//                    string decodedString = Encoding.UTF8.GetString(data);

//                    if (!decodedString.Equals("CEL1@3$5"))
//                    {
//                        string[] tokensValues = decodedString.Split(new char[] { ':' }, 2);
//                        if (tokensValues.Length != 2)
//                        {
//                            var response = new HttpResponseMessage(HttpStatusCode.Unauthorized);
//                            var tsc = new TaskCompletionSource<HttpResponseMessage>();
//                            tsc.SetResult(response);
//                            return tsc.Task;
//                        }
//                        int EmployeeID;
//                        int.TryParse(tokensValues[0], out EmployeeID);
//                        ServiceInitializer.Initialize(EmployeeID);
//                        EmpMobile oEmpMobile = _EmpMobileService.Get(EmployeeID, tokensValues[1]);
//                        if (oEmpMobile != null)
//                        {
//                            IPrincipal principal = new CustomPrincipal(oEmpMobile);
//                            Thread.CurrentPrincipal = principal;
//                            HttpContext.Current.User = principal;
//                        }
//                        else // Unauthorized access - wrong crededentials   
//                        {
//                            // { for hosting purpose }
//                            //oEmpMobile = EmpMobile.GetByEmployeeID(ID.FromInteger(EmployeeID)).First();
//                            //IPrincipal principal = new CustomPrincipal(oEmpMobile);
//                            //Thread.CurrentPrincipal = principal;
//                            //HttpContext.Current.User = principal;

//                            var response = request.CreateResponse(HttpStatusCode.Forbidden, new CustomMessage() { Caption = EnumExceptionType.Error.ToFriendlyString(), Message = "Access Forbidden.Contact to system Administrator." });
//                            var tsc = new TaskCompletionSource<HttpResponseMessage>();
//                            tsc.SetResult(response);
//                            return tsc.Task;
//                        }
//                    }

//                }
//                else
//                {
//                    var response = request.CreateResponse(HttpStatusCode.Forbidden, new CustomMessage() { Caption = EnumExceptionType.Error.ToFriendlyString(), Message = "Access Forbidden.Contact to system Administrator." });
//                    var tsc = new TaskCompletionSource<HttpResponseMessage>();
//                    tsc.SetResult(response);
//                    return tsc.Task;
//                }
//                return base.SendAsync(request, cancellationToken);
//            }
//            catch
//            {
//                var response = request.CreateResponse(HttpStatusCode.Forbidden, new CustomMessage() { Caption = EnumExceptionType.Error.ToFriendlyString(), Message = "Access Forbidden.Contact to system Administrator." });
//                var tsc = new TaskCompletionSource<HttpResponseMessage>();
//                tsc.SetResult(response);
//                return tsc.Task;
//            }
//        }
//    }
//}