using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Net;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Threading;
using BeWo.Core;
using BeWo.ServiceProxy;
using BeWo.View.Controls;
using BeWo.View.Detail;
using BeWo.ViewModel;

using Blacklight.Wpf.Controls;

using BS.Shared;
using BS.Shared.DataContracts;
using BS.Shared.DataContracts.Compact;
using BS.Shared.Extensions;
using BS.Shared.RSS;
using System.Text.RegularExpressions;
using System.Windows.Markup;
using System.Xml;
using BeWo.Annotations;
using BeWo.ownChat;
using BeWo.Scheduler.Utils;
using BeWo.Scheduler.View;
using BeWo.View.Master;
using ChatController.HauptKlassen;
using DevExpress.Data.Helpers;
using DevExpress.Xpf.Docking.VisualElements;
using DevExpress.Xpf.DocumentViewer;
using DevExpress.Xpf.Printing;
using DevExpress.XtraScheduler;
using DevExpress.XtraScheduler.Xml;
using Brushes = System.Windows.Media.Brushes;
using Button = System.Windows.Controls.Button;
using Color = System.Windows.Media.Color;
using Control = System.Windows.Controls.Control;
using Image = System.Windows.Controls.Image;
using ListBox = System.Windows.Controls.ListBox;
using MessageBox = System.Windows.MessageBox;
using ScrollBar = System.Windows.Controls.Primitives.ScrollBar;

namespace BeWo.View
{
    /// <summary>
    ///     Interaction logic for HomeView.xaml
    /// </summary>
    public partial class HomeView : BeWoView, INotifyPropertyChanged
    {
        #region Constant Fields

        private const int Datebuffer = 14;

        #endregion

        #region Fields

        public NewSchedulerView PropertyScheduler;
        public ChatView ServiceChatView;
        public event PropertyChangedEventHandler PropertyChanged;

        protected bool PropertyChatBerechtigung;

        private readonly Dictionary<string, bool> _NewsItemExpandedState = new Dictionary<string, bool>();
        private DateTime _BufferDate = DateTime.Today.AddDays(-1 * Datebuffer);
        private DateTime _CurrentDate = DateTime.Today;
        private List<SchedulerAppointmentDC> _AllSchedulerTasks;
        private List<CompactEmployeeDC> _EmployeesForAppointmentView;
        private CompactEmployeeDC _SelectedEmployeeForAppointments;
        private bool _IsAllowedToSeeMitarbeitertermine;
        private bool _IsShowingAppointments;
        private bool _HasRightsToSeeAppointments;

        #endregion

        #region Constructors

        public HomeView()
        {
            InitializeComponent();

            DataContext = this;

            txtHeader.Text = $"{BeWoApp.LoggedOnUser.Employee.FirstName} {BeWoApp.LoggedOnUser.Employee.LastName}";
            txtVersion.Text = BeWoApp.Version;
            txtLoginTime.Text = string.Empty;
            txtLastLoginTime.Text = string.Empty;
            PasswortSchloss.Text = string.Join("", (from Match m in Regex.Matches("D83DDD12", @"\S{4}") select (char)int.Parse(m.Value, NumberStyles.HexNumber)).ToArray());

            //PreparePanels();


            HyperlinkZuPasswortsicherheit.NavigateUri = new Uri("http://news.bewoplaner.de/?NewsType=3&NewsCount=1&NewsOID=373457455");


#if DEBUG
            //txtChangePassword.Visibility = Visibility.Visible;

#else
			if (BeWoApp.Tenant == "demo" || !BeWoApp.LoggedOnUser.HasRight(UserRightType.AllowChangeOwnPassword))
			{
				txtChangePassword.Visibility = Visibility.Collapsed;
			}
#endif
            // FillInbox();
            // FillOutbox();
            Loaded += HomeDragPanelViewLoaded;

            /*this.Dispatcher.BeginInvoke(
                DispatcherPriority.Normal,
                (Action)delegate
                {
                    ConnectWithServer();
                    if(clientSocket.Connected)
                        MessageBox.Show("Verbindung geglückt.", "Info", MessageBoxButton.OK,MessageBoxImage.Information);
                });*/

            if (BeWoApp.AppSettings.IsChatAllowed)
            {
                var berechtigung = ServiceFacade.DoEmployeeServiceSync(s => s.GetAllChatActiveEmployeesCompact());
                if (berechtigung != null)
                {
                    foreach (var list in berechtigung)
                    {
                        if (list.PersonOid == BeWoApp.LoggedOnUser.Employee.PersonOid)
                        {
                            PropertyChatBerechtigung = true;
                        }
                    }
                }
            }

#if DEBUG
            PropertyChatBerechtigung = true;
#endif
            BewoChat.Visibility = PropertyChatBerechtigung ? Visibility.Visible : Visibility.Hidden;

            PruefePasswortStaerke();

            //ServiceFacade.DoOperationsServiceAsync(s => s.GetHomeViewPanels(), r => Dispatcher?.Invoke(() => UpdatePanels(r)));

            var panels = ServiceFacade.DoOperationsServiceSync(s => s.GetHomeViewPanels());
            UpdatePanels(panels);
        }

        #endregion

        #region Finalizers

        #endregion

        #region Delegates

        #endregion

        #region Events

        [NotifyPropertyChangedInvocator]
        protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }

        private void HomeDragPanelViewLoaded(object o, RoutedEventArgs e)
        {
            SetMaximizedPanel();
            //Warum klappt das bei Köln Ring nicht?=
            if (BeWoApp.LoggedOnUser == null || BeWoApp.LoggedOnUser.ResetPasswordInfos == null)
            {
                return;
            }

            if (!BeWoApp.LoggedOnUser.ResetPasswordInfos.Any(a => a.HasToChangePW))
            {
                return;
            }

            var fenster = new PasswortAenderungsView { AbbrechenButton = { IsEnabled = false } };
            fenster.CommandBindings.Clear();

            fenster.ShowDialog();
        }

        private void ButtonOpenServiceRecordView_Click(object sender, RoutedEventArgs e)
        {
            if (sender is Button btn && btn.Tag is CompactSupportConceptDC dc)
            {
                BeWoApp.MainControl.NavigateToServiceRecordView(dc.SupportConceptOid);
            }
        }

        private void RadioButton_Checked(object sender, RoutedEventArgs e)
        {
            if (_AllSchedulerTasks != null)
            {
                var controlName = ((Control)e.OriginalSource).Name;

                switch (controlName)
                {
                    case "rb_all":
                        _IsShowingAppointments = false;
                        listboxTasks.ItemsSource = _AllSchedulerTasks.Where(w => w.IsTask).OrderBy(i => i.CompletedDate ?? i.DueDate).ToList();
                        ShowAppointments(false);
                        break;
                    case "rb_open":
                        _IsShowingAppointments = false;
                        listboxTasks.ItemsSource = _AllSchedulerTasks.Where(i => !i.CompletedDate.HasValue && i.IsTask).OrderBy(i => i.DueDate).ToList();
                        ShowAppointments(false);
                        break;
                    case "rb_closed":
                        _IsShowingAppointments = false;
                        listboxTasks.ItemsSource = _AllSchedulerTasks.Where(i => i.CompletedDate.HasValue && i.IsTask).OrderByDescending(i => i.CompletedDate).ToList();
                        ShowAppointments(false);
                        break;
                    case "rb_appointments":
                        _IsShowingAppointments = true;
                        listboxTasks.ItemsSource = _AllSchedulerTasks.Where(i => !i.IsTask).OrderByDescending(i => i.EndDate).ToList();
                        ShowAppointments(true);
                        break;
                }
            }
        }

        public void TimeIntervalBackButtonOnClick(object sender, EventArgs args)
        {
            CurrentDate = CurrentDate.AddDays(-1);
            UpdateAppointmentDateTextBlock(_CurrentDate);
        }

        public void TimeIntervalForwardsButtonOnClick(object sender, EventArgs args)
        {
            CurrentDate = CurrentDate.AddDays(1);
            UpdateAppointmentDateTextBlock(_CurrentDate);
        }

        private void listboxSupportConcepts_MouseDoubleClick(object sender, MouseButtonEventArgs e)
        {
            if (!IsPartOf(e.OriginalSource, typeof(ScrollBar)))
            {
                var sc = ((ListBox)sender).SelectedItem as CompactSupportConceptDC;

                if (sc != null &&
                    (BeWoApp.LoggedOnUser.HasRight(UserRightType.SupportConcept_ViewAllSupportConcepts) ||
                     BeWoApp.LoggedOnUser.HasRight(UserRightType.ViewAll) ||
                     BeWoApp.LoggedOnUser.HasRight(UserRightType.SupportConceptView_View)))
                {
                    VMFactory.CreateSupportConceptVMAsync(
                        sc.SupportConceptOid,
                        cb => this.Dispatch(
                            delegate
                            {
                                MainControl.NavigateTo(new SupportConceptView(cb) { ParentView = this });
                                //new SupportConceptView2(cb)
                                //        {
                                //            ParentView = this
                                //        });
                            }));
                }
            }
        }

        private void listboxTasks_MouseDoubleClick(object sender, MouseButtonEventArgs e)
        {
            if (!IsPartOf(e.OriginalSource, typeof(ScrollBar)))
            {
                if (((ListBox)sender).SelectedItem is SchedulerAppointmentDC sc && sc.IsTask && sc.SupportConceptList.Count == 1 &&
                    (BeWoApp.LoggedOnUser.HasRight(UserRightType.SupportConcept_ViewAllSupportConcepts) ||
                     BeWoApp.LoggedOnUser.HasRight(UserRightType.ViewAll) ||
                     BeWoApp.LoggedOnUser.HasRight(UserRightType.SupportConceptView_View)))
                {
                    VMFactory.CreateSupportConceptVMAsync(
                        sc.SupportConceptList.First().SupportConceptOid,
                        cb => this.Dispatch(
                            delegate
                            {
                                MainControl.NavigateTo(
                                    new SupportConceptView(cb, sc)
                                    {
                                        ParentView = this
                                    });
                                //new SupportConceptView2(cb)
                                //{
                                //    ParentView = this
                                //});
                            }));
                }
                else if (((ListBox)sender).SelectedItem is SchedulerAppointmentDC sc2 && !sc2.IsTask &&
                        (BeWoApp.LoggedOnUser.HasRight(UserRightType.KalenderAnsehen) ||
                         BeWoApp.LoggedOnUser.HasRight(UserRightType.ViewAll)) && sc2.StartDate.HasValue)
                {
                    MainControl.NavigateTo(new SchedulerMasterView(sc2.StartDate.Value, sc2) { ParentView = this });
                }
            }
        }

        private void Hyperlink_OnRequestNavigate(object sender, RequestNavigateEventArgs e)
        {
            Process.Start(new ProcessStartInfo((sender as Hyperlink).NavigateUri.ToString()));
        }

        private void PasswortAendernLinkOnRequestNavigate(object sender, RequestNavigateEventArgs e)
        {
            var pav = new PasswortAenderungsView();
            pav.ShowDialog();
        }

        private void LinkNewDatenschutz_OnRequestNavigate(object sender, RequestNavigateEventArgs e)
        {
            Process.Start(new ProcessStartInfo((sender as Hyperlink)?.NavigateUri.ToString()));
        }

        private void BtnCreateNewsItem_OnClick(object sender, RoutedEventArgs e)
        {
            TeamNewsItemVM teamVm = ((Button)sender).Tag as TeamNewsItemVM;
            if (teamVm != null)
            {
                NewsItemDC dc = new NewsItemDC();
                dc.PublishDate = DateTime.Now;
                dc.Team = teamVm.Team;

                NewsItemVM vm = new NewsItemVM(dc);
                var ctrl = new NewsItemEditControl(vm);

                BeWoWindow window = BeWoWpfUtils.CreateBeWoPopupWindow(400, 500);
                window.GroupBoxContent = ctrl;
                window.Height = 400;
                window.Owner = BeWoApp.CurrentBeWo.MainWindow;
                //ThemeManager.SetTheme(window, Theme.Office2010Black);

                ctrl.CancelButtonClicked += window.Close;
                ctrl.OkButtonClicked += () =>
                {
                    SaveNewsItem(vm);
                    window.Close();
                };


                window.rootGroupBox.Header = "Neuer Eintrag";
                window.Title = "Neuer Eintrag";
                window.Show();

            }
        }

        private void BtnEditNewsItem_OnClick(object sender, RoutedEventArgs e)
        {
            NewsItemDC dc = ((Button)sender).Tag as NewsItemDC;
            if (dc != null)
            {
                NewsItemVM vm = new NewsItemVM(dc);
                var ctrl = new NewsItemEditControl(vm);

                BeWoWindow window = BeWoWpfUtils.CreateBeWoPopupWindow(400, 500);
                window.GroupBoxContent = ctrl;
                window.Height = 400;
                window.Owner = BeWoApp.CurrentBeWo.MainWindow;
                //ThemeManager.SetTheme(window, Theme.Office2010Black);
                ctrl.CancelButtonClicked += window.Close;
                ctrl.OkButtonClicked += () =>
                {
                    UpdateNewsItem(vm);
                    window.Close();
                };

                window.rootGroupBox.Header = "Eintrag bearbeiten";
                window.Title = "Eintrag bearbeiten";
                window.Show();

            }
        }

        private void BtnDeleteNewsItem_OnClick(object sender, RoutedEventArgs e)
        {
            NewsItemDC dc = ((Button)sender).Tag as NewsItemDC;
            if (dc != null)
            {
                if (MessageBox.Show("Wollen Sie den Eintrag '" + dc.Title + "' wirklich löschen?", "Löschen bestätigen",
                        MessageBoxButton.YesNo, MessageBoxImage.Question) == MessageBoxResult.Yes)
                {
                    ServiceFacade.DoEmployeeServiceSync(
                        s => s.DeleteNewsItem(dc.NewsItemOid.Value, dc.NewsItemVersion.Value));

                    UpdateInternalNews();
                }
            }
        }

        private void HyperlinkChat_OnRequestNavigate(object sender, RequestNavigateEventArgs e)
        {

            //#if DEBUG
            //            var kundennummer = "5473568546";
            //            //var apikey = "0b50c09aff87f20d9ced75340e04e5ccaa11dd3e7bcf25e9c4f94dc20d3cbb97";

            //            Login _login = new Login(kundennummer, "kihqx-PiGka", "cb", "bewo", "0b50c09aff87f20d9ced75340e04e5ccaa11dd3e7bcf25e9c4f94dc20d3cbb97");

            //            var x = _login.AnmeldevorgangDurchFuehren();

            //            ServiceChatView = new ChatView(x);
            //            ServiceChatView.Show();
            //#else

            if (ServiceChatView == null)
            {
#if DEBUG
                if (true)
                {
                    string _Code = "HcYki-8hLbQ";
                    string _kundennummer = "4368658435";
                    string _benutzername = "BaeurleC";
                    string _passwort = "asFdgAE5ERfdsew4!";
                    string _apikey;
#else

                var empAppCodes = ServiceFacade.DoEmployeeServiceSync(r=>r.GetAllEmployeeAppCodes(BeWoApp.LoggedOnUser.Employee.EmployeeOid));

                if (empAppCodes != null && empAppCodes.Count > 0)
                {
                    string _Code = "";
                    foreach (var item in empAppCodes)
                    {
                        if(item.EmployeeCode != null && !item.EmployeeCode.Equals(""))
                            _Code = item.EmployeeCode;
                    }

                    //var xxx = empAppCodes.Last();

                    string _kundennummer = BeWoApp.Tenant;

                    string _benutzername = BeWoApp.UserName;
                    string _passwort = BeWoApp.UserPassword;
                    string _apikey;
#endif
                    //string _ChatCode = "";
                    //if (xxx.EmployeeCode != null && !xxx.EmployeeCode.Equals(""))
                    //{
                    //    _ChatCode = xxx.EmployeeCode;
                    //}

                    _apikey = BeWoApp.Mandator.Apikey ?? "0000";

                    if (!_Code.Equals(""))
                    {
                        Login _login = new Login(_kundennummer, _Code, _benutzername, _passwort, _apikey);

                        var x = _login.AnmeldevorgangDurchFuehren();

                        if (x != null)
                        {
                            ServiceChatView = new ChatView(x);
                            ServiceChatView.Show();
                        }
                    }
                    else
                    {
                        MessageBox.Show("Sie benötigen einen gültigen Chat-Code.", "Info");
                    }
                }
                else
                {
                    MessageBox.Show("Sie benötigen einen gültigen Zugang zum Chat. Bitte wenden Sie sich an den Support.", "Info");
                }
            }
            //else if (ServiceChatView.Visibility == Visibility.Visible)
            //{
            //    ServiceChatView.Visibility = Visibility.Hidden;
            //}
            //else if (ServiceChatView.Visibility == Visibility.Hidden)
            //{
            //    ServiceChatView.Visibility = Visibility.Visible;

            //    if (ServiceChatView.WindowState == WindowState.Minimized)
            //    {
            //        ServiceChatView.WindowState = WindowState.Normal;
            //        ServiceChatView.Height = 700;
            //        ServiceChatView.Width = 900;
            //    }

            //    ServiceChatView.Activate();
            //}
            //#endif
        }

        private void ShowAppointmentRequests(object sender, RequestNavigateEventArgs e)
        {
            PropertyScheduler.ShowAppointmentRequests(sender, e);
        }

        private void EmployeeFilterBox_OnSelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (e?.AddedItems?.Count > 0 && _IsShowingAppointments)
            {
                _SelectedEmployeeForAppointments = (CompactEmployeeDC)e.AddedItems[0];
                LoadTasksAndAppointments(false, true);
            }
        }

        private void CreateTestAppointmentsButtonOnClick(object sender, RoutedEventArgs e)
        {
            ServiceFacade.DoResourceServiceAsync(s =>
            {
                if (BeWoApp.LoggedOnEmployeeOid != null)
                {
                    s.InsertTestAppointments(BeWoApp.LoggedOnEmployeeOid.Value);

                    this.Dispatch(() =>
                    {
                        LoadTasksAndAppointments(false, true);
                    });
                }
            });
        }

        private void DeleteTestAppointmentsButtonOnClick(object sender, RoutedEventArgs e)
        {
            ServiceFacade.DoResourceServiceAsync(s =>
            {
                if (BeWoApp.LoggedOnEmployeeOid != null)
                {
                    s.DeleteTestAppointments();

                    this.Dispatch(() =>
                    {
                        LoadTasksAndAppointments(false, true);
                    });
                }
            });
        }

        #endregion

        #region InterfacesImplementations

        #endregion

        #region Properties

        public List<CompactEmployeeDC> EmployeesForAppointmentView
        {
            get => _EmployeesForAppointmentView ?? (_EmployeesForAppointmentView = new List<CompactEmployeeDC>());

            set
            {
                _EmployeesForAppointmentView = value;
                OnPropertyChanged(nameof(EmployeesForAppointmentView));
            }
        }

        public DateTime CurrentDate
        {
            get => _CurrentDate;
            set
            {
                if (!Equals(_CurrentDate, value))
                {
                    _CurrentDate = value;
                    UpdateAppointmentDateTextBlock(value);
                    OnPropertyChanged(nameof(CurrentDate));
                }
            }
        }

        #endregion

        #region Indexers

        #endregion

        #region Methods

        public void UpdateRequestsHyperLink()
        {
            if (PropertyScheduler != null)
            {
                PropertyScheduler.UpdateRequestString();

                RequestsHyperLinkTextBlock.Text = PropertyScheduler.Requests;
                RequestsHyperlink.IsEnabled = PropertyScheduler.Enabled;
                RequestsTextBlock.IsEnabled = PropertyScheduler.Enabled;
            }
        }

        public void SaveState()
        {
            var order = new List<DragDockPanel>();
            DragDockPanel panelWithMaxHeight = null;
            double maxHeight = 0;
            double normalHeight = 0;

            var result = new List<DependencyObject>();

            foreach (var item in PanelHost.Children)
            {
                var p = item as DragDockPanel;

                if (order.Count == 0)
                {
                    order.Add(p);
                }
                else
                {
                    var newIndex = -1;
                    var index = 0;

                    var rect = VisualTreeHelper.GetOffset(p);
                    foreach (var item2 in order)
                    {
                        string name1 = p.Name;
                        string name2 = item2.Name;

                        var rect2 = VisualTreeHelper.GetOffset(item2);
                        if (rect.Y < rect2.Y)
                        {
                            newIndex = index;
                            continue;
                        }

                        if (Equals(rect.Y, rect2.Y) && rect.X < rect2.X)
                        {
                            newIndex = index;
                            continue;
                        }

                        index++;
                    }

                    if (newIndex < 0)
                    {
                        order.Add(p);
                    }
                    else
                    {
                        order.Insert(newIndex, p);
                    }
                }

                if (p.Height > maxHeight)
                {
                    maxHeight = p.ActualHeight;
                    panelWithMaxHeight = p;
                }
                else
                {
                    normalHeight = p.ActualHeight;
                }
            }

            if ((maxHeight - normalHeight) > 1 && panelWithMaxHeight != null)
            {
                BeWoApp.AppSettings.StartupPanelMaximized = panelWithMaxHeight.Name;
            }
            else
            {
                BeWoApp.AppSettings.StartupPanelMaximized = null;
            }

            var panelOrder = order.Select(item => item.Name).ToList();

            BeWoApp.AppSettings.StartupPanelOrder = panelOrder;
        }

        private static bool IsPartOf(object p, Type type)
        {
            if (p is FrameworkElement fe)
            {
                if (fe.GetType() == type)
                    return true;

                return IsPartOf(fe.TemplatedParent, type);
            }

            return false;
        }

        private void PruefePasswortStaerke()
        {
            switch (BeWoApp.PasswortStrength)
            {
                case PasswortSecurityStrength.SehrSchwach:
                    PasswortSchloss.Foreground = new SolidColorBrush(Colors.Red);

                    this.Dispatcher.BeginInvoke(
                        DispatcherPriority.Normal,
                        (Action)delegate
                        {
                            if (BeWoApp.AppSettings.IsPasswordSecurityActiv)
                            {
                                MessageBox.Show("Sie benutzen ein sehr schwaches Passwort.\nBitte ändern Sie Ihr Passwort, indem Sie im Startbildschirm oben auf \"Passwort ändern\" klicken.", "Achtung!",
                                    MessageBoxButton.OK, MessageBoxImage.Information);
                            }
                        });
                    break;
                case PasswortSecurityStrength.Schwach:
                    PasswortSchloss.Foreground = new SolidColorBrush(Colors.OrangeRed);

                    this.Dispatcher.BeginInvoke(
                        DispatcherPriority.Normal,
                        (Action)delegate
                        {
                            if (BeWoApp.AppSettings.IsPasswordSecurityActiv)
                            {
                                MessageBox.Show("Sie benutzen ein schwaches Passwort.\nBitte ändern Sie Ihr Passwort, indem Sie im Startbildschirm oben auf \"Passwort ändern\" klicken.", "Achtung!",
                                    MessageBoxButton.OK, MessageBoxImage.Information);
                            }
                        });
                    break;
                case PasswortSecurityStrength.Mittelmass:
                    PasswortSchloss.Foreground = new SolidColorBrush(Colors.Yellow);
                    break;
                case PasswortSecurityStrength.Stark:
                case PasswortSecurityStrength.SehrStark:
                    PasswortSchloss.Foreground = new SolidColorBrush(Colors.Green);
                    break;
                default:
                    throw new ArgumentOutOfRangeException();
            }
        }

        private void InitPanelsCallback(IList<UiElementDC> elements, object state)
        {
            Dispatcher?.BeginInvoke(DispatcherPriority.Normal,
                (Action)delegate { InitPanels(elements); });
        }

        private void InitPanels(IList<UiElementDC> elements)
        {
            listboxExpiringSupportConcepts.Items.Clear();
            listboxConferenceDates.Items.Clear();
            listboxBirthdays.Items.Clear();
            listboxNews.Items.Clear();
            listboxTasks.Items.Clear();
            //ListboxInternalNews.Items.Clear();
            InternalNewsGrid.Children.Clear();


            LoadContent();
        }

        private void LoadBewoNews()
        {
            try
            {
                if (BeWoApp.Tenant != "demo")
                {
                    LoadFeed();

                    //LoadFeed("http://www.heise.de/foto/rss/news-atom.xml");
                }
            }
            catch (Exception)
            {
                // ignored
            }
        }

        private void LoadBirthdays()
        {
            var endOfWeek = DateTime.Now.GetNext(DayOfWeek.Sunday).Date;
            endOfWeek = endOfWeek.AddDays(1).GetNext(DayOfWeek.Sunday).Date;
            ServiceFacade.DoAnalysisServiceAsync(s1 => s1.GetPersonsHavingBirthday(endOfWeek), ReloadBirthdays, false);
        }

        private void LoadContent()
        {
            LoadLoginInfo();

            if (IsPanelVisible("PanelTasks"))
            {
                LoadTasks();
            }

            if (IsPanelVisible("PanelExpiringSupportConcepts"))
            {
                LoadExpiredSupportConcepts();
            }

            if (IsPanelVisible("PanelConferenceDates"))
            {
                LoadNextConferenceDates();
            }
            
            if (IsPanelVisible("PanelBirthdates"))
            {
                LoadBirthdays();
            }

            if (IsPanelVisible("PanelInternalNews"))
            {
                UpdateInternalNews();
            }

            if (IsPanelVisible("PanelBeWoNews"))
            {
                LoadBewoNews();
            }


            rb_open.IsChecked = true;
        }

        private bool IsPanelVisible(string test)
        {
            foreach (DragDockPanel panel in PanelHost.Children)
            {
                if (panel.Name == test)
                {
                    return true;
                }
            }

            return true;
        }

        private void LoadExpiredSupportConcepts()
        {
            // DateTime endOfWeek = DateTime.Now.GetNext(DayOfWeek.Sunday).Date;
            // DateTime endOfWeek2 = endOfWeek.AddDays(8);
            var dt = DateTime.Now.AddMonths(BeWoApp.AppSettings.HilfeplanAuslaufAuswahl);
            ServiceFacade.DoAnalysisServiceAsync(
                s1 => s1.GetExpiringSupportConcepts(BeWoApp.LoggedOnUser.Employee.EmployeeOid, dt),
                ReloadExpiringSupportConcepts, false);
        }

        private void LoadLoginInfo()
        {
            DateTime endOfWeek = DateTime.Now.GetNext(DayOfWeek.Sunday).Date;

            ServiceFacade.DoAnalysisServiceAsync(s1 => s1.GetLastLogins(BeWoApp.LoggedOnUser.LoginName), ReloadLogins, false);
        }

        private void LoadNextConferenceDates()
        {
            DateTime endOfWeek = DateTime.Now.GetNext(DayOfWeek.Sunday).Date;
            DateTime endOfWeek2 = endOfWeek.AddDays(8);

            ServiceFacade.DoAnalysisServiceAsync(
                s1 => s1.GetSupportConceptsWithConferenceDate(BeWoApp.LoggedOnUser.Employee.EmployeeOid, endOfWeek2),
                ReloadConferenceDates, false);
        }

        private void LoadTasks()
        {
            var test = 0;

            while (BeWoApp.LoggedOnEmployee == null && test < 50)
            {
                Thread.Sleep(100);
                test++;
            }

            if (BeWoApp.LoggedOnEmployee != null)
            {
                var rights = new List<UserRightType> { UserRightType.KalenderAnsehen };

                _HasRightsToSeeAppointments = BeWoUtils.HasRight(UserRightType.KalenderAnsehen) || BeWoUtils.HasRight(UserRightType.ViewAll);

                var r2 = rights;
                r2.Add(UserRightType.KalenderMitarbeitertermineAnsehen);

                var r3 = rights;
                r3.Add(UserRightType.KalenderKliententermineAlleAnsehen);

                var r5 = rights;
                r5.Add(UserRightType.KalenderRessourcentermineAnsehen);

                _IsAllowedToSeeMitarbeitertermine = r2.All(BeWoUtils.HasRight) || BeWoUtils.HasRight(UserRightType.ViewAll);
                _IsAllowedToSeeCustomerAppointments = r3.All(BeWoUtils.HasRight) || BeWoUtils.HasRight(UserRightType.ViewAll);
                _IsAllowedToSeeResourceAppointments = r5.All(BeWoUtils.HasRight) || BeWoUtils.HasRight(UserRightType.ViewAll);

                if (_HasRightsToSeeAppointments && _IsAllowedToSeeMitarbeitertermine)
                {
#if DEBUG
                    TestTermineAnlegenButton.Visibility = Visibility.Visible;
                    TestTermineLoeschenButton.Visibility = Visibility.Visible;
#endif

                    employeeFilterBox.Visibility = Visibility.Visible;

                    ServiceFacade.DoEmployeeServiceAsync(s => s.GetAllActiveEmployeesCompact(), cb =>
                    {
                        this.Dispatch(delegate
                        {
                            EmployeesForAppointmentView = cb.OrderBy(o => o.LastName + ", " + o.FirstName).ToList();
                            employeeFilterBox.SelectedItem = BeWoApp.CompactLoggedOnEmployee;
                        });
                    }, false);
                }
                else
                {
                    EmployeesForAppointmentView = new List<CompactEmployeeDC> { BeWoApp.CompactLoggedOnEmployee };
                    employeeFilterBox.SelectedItem = BeWoApp.CompactLoggedOnEmployee;
                }

                ShowAppointments(false);
                LoadTasksAndAppointments(true, true);
            }
        }

        private void UpdateInternalNews()
        {
            if (InternalNewsGrid != null)
            {
                _NewsItemExpandedState.Clear();
                foreach (var child in InternalNewsGrid.Children)
                {
                    var rootsp = child as StackPanel;

                    if (rootsp != null && rootsp.Children.Count > 0)
                    {
                        foreach (var child2 in rootsp.Children)
                        {
                            var ex = child2 as Expander;

                            if (ex != null)
                            {
                                var grid = ex.Header as Grid;
                                String text = "";

                                if (grid != null)
                                {
                                    foreach (var gridChild in grid.Children)
                                    {
                                        if (gridChild is TextBlock)
                                        {
                                            var tb = gridChild as TextBlock;
                                            text = tb.Text;
                                        }
                                    }
                                }
                                if (!_NewsItemExpandedState.ContainsKey(text))
                                {
                                    _NewsItemExpandedState.Add(text, ex.IsExpanded);
                                }

                            }
                        }

                    }
                }
            }

            var showTeamNews = BeWoApp.AppSettings.ShowTeamNews;

            //ServiceFacade.DoEmployeeServiceAsync(s => s.GetPublishedNewsItems(), cb => this.Dispatch(delegate { listboxInternalNews.ItemsSource = cb.OrderByDescending(i => i.PublishDate).ToList(); }));
            ServiceFacade.DoEmployeeServiceAsync(
                s => s.GetPublishedNewsItemsForEmployee(BeWoApp.LoggedOnUser.Employee.EmployeeOid, showTeamNews),
                RefreshInternalNews, false);
        }

        private void UpdatePanels(List<HomeViewPanelDC> panels)
        {
            if (panels != null && panels.Count > 0)
            {
                PanelHost.Children.Clear();

                var dict = new Dictionary<HomeViewPanelType, DragDockPanel>()
                {
                    {HomeViewPanelType.BeWoNewsPanel, PanelBeWoNews},
                    {HomeViewPanelType.BirthdatesPanel, PanelBirthdates},
                    {HomeViewPanelType.ConferenceDatesPanel, PanelConferenceDates},
                    {HomeViewPanelType.ExpiringSupportConceptsPanel, PanelExpiringSupportConcepts},
                    {HomeViewPanelType.InternalNewsPanel, PanelInternalNews},
                    {HomeViewPanelType.TasksPanel, PanelTasks}
                };


                //panels.Add(new HomeViewPanelDC { HeaderTitel = "TestTask", PanelType = HomeViewPanelType.TasksPanel });
                //panels.Add(new HomeViewPanelDC { HeaderTitel = "TestNews", PanelType = HomeViewPanelType.BeWoNewsPanel });
                //panels.Add(new HomeViewPanelDC { HeaderTitel = "TestDates", PanelType = HomeViewPanelType.ExpiringSupportConceptsPanel });
                //panels.Add(new HomeViewPanelDC { HeaderTitel = "Test", PanelType = HomeViewPanelType.TasksPanel });

                var save = BeWoApp.AppSettings.StartupPanelOrder;
                if (save == null || save.Count != panels.Count)
                {
                    save = panels.Select(p => GetDefaultPanelName(p)).ToList();
                }

                foreach (var name in save)
                {
                    foreach (var panelDC in panels)
                    {
                        if (GetDefaultPanelName(panelDC) == name)
                        {
                            if (dict.ContainsKey(panelDC.PanelType))
                            {
                                var panel = dict[panelDC.PanelType];
                                PanelHost.Children.Add(panel);
                                if (String.IsNullOrEmpty(panelDC.HeaderTitel)) continue;

                                foreach (var child in ((StackPanel) panel.Header).Children)
                                {
                                    if (child is TextBlock textBlock && (string) textBlock.Tag == "Titel")
                                    {
                                        textBlock.Text = panelDC.HeaderTitel;
                                    }
                                }
                            }
                            else if (panelDC.PanelType == HomeViewPanelType.CustomReportPanel)
                            {
                                PanelHost.Children.Add(CreateReportPanel(panelDC.HeaderTitel, panelDC.Value));
                            }
                            else if (panelDC.PanelType == HomeViewPanelType.CustomXamlPanel)
                            {
                                PanelHost.Children.Add(CreateXamlPanel(panelDC.HeaderTitel, panelDC.Value));
                            }
                            else
                            {
                                throw new ArgumentOutOfRangeException();
                            }
                        }
                    }
                }
                
                SetMaximizedPanel();
            }
            else
            {

                ReorderPanels();
            }
            InitPanels(null);
        }

        private string GetDefaultPanelName(HomeViewPanelDC p)
        {
            
            switch (p.PanelType)
            {
                case HomeViewPanelType.TasksPanel:
                    return "PanelTasks";
                case HomeViewPanelType.ExpiringSupportConceptsPanel:
                    return "PanelExpiringSupportConcepts";
                case HomeViewPanelType.ConferenceDatesPanel:
                    return "PanelConferenceDates";
                case HomeViewPanelType.BirthdatesPanel:
                    return "PanelBirthdates";
                case HomeViewPanelType.InternalNewsPanel:
                    return "PanelInternalNews";
                case HomeViewPanelType.BeWoNewsPanel:
                    return "PanelBeWoNews";
            }

            return p.HeaderTitel;
        }

        private DragDockPanel CreateReportPanel(string title, string reportName)
        {
            var panel = new DragDockPanel()
            {
                Tag = "CustomReport",
                Name = title,
                Header = new StackPanel()
                {
                    Orientation = Orientation.Horizontal,
                    Children =
                    {
                        new Image()
                        {
                            Source = new BitmapImage(new Uri(@"..\Ressources\Icons\ChartBarDisabled.png", UriKind.Relative)),
                            Stretch = Stretch.Fill,
                            StretchDirection = StretchDirection.Both
                        },
                        new TextBlock()
                        {
                            Text = title ?? "Bericht",
                            TextWrapping = TextWrapping.Wrap,
                            FontSize = 16,
                            Foreground = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#E0E0E0")),
                            VerticalAlignment = VerticalAlignment.Bottom,
                            Margin = new Thickness(5,0,0,5),
                            Tag = "Titel"
                        }
                    }
                }
            };
            var ctrl = new DocumentPreviewControl
            {
                CommandBarStyle = CommandBarStyle.None,
                Margin = new Thickness(-3, -4, -3, -3)
            };
            panel.Content = ctrl;
            panel.Loaded += (s, e) => LoadReport(reportName, title, panel);

            return panel;
        }

        private DragDockPanel CreateXamlPanel(string title, string xamlString)
        {
            var panel = new DragDockPanel()
            {
                Tag = "CustomReport",
                Name = title,
                Header = new StackPanel()
                {
                    Orientation = Orientation.Horizontal,
                    Children =
                    {
                        new Image()
                        {
                            Source = new BitmapImage(new Uri(@"..\Ressources\Icons\ChartBarDisabled.png", UriKind.Relative)),
                            Stretch = Stretch.Fill,
                            StretchDirection = StretchDirection.Both
                        },
                        new TextBlock()
                        {
                            Text = title ?? "Bericht",
                            TextWrapping = TextWrapping.Wrap,
                            FontSize = 16,
                            Foreground = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#E0E0E0")),
                            VerticalAlignment = VerticalAlignment.Bottom,
                            Margin = new Thickness(5,0,0,5),
                            Tag = "Titel"
                        }
                    }
                },
                Content = XamlReader.Parse(xamlString)
            };

            return panel;
        }

        private void LoadReport(string reportName, string title, DragDockPanel panel)
        {
            ServiceFacade.DoReportServiceAsync(s => s.CreateCustomReport(BeWoApp.LoggedOnEmployee.EmployeeOid.Value, reportName),  ms => SetReportControl(ms, title, panel), false);
        }

        private void SetReportControl(MemoryStream ms, string title, DragDockPanel panel)
        {
            this.Dispatch(
                delegate
                {
                    //var grid = new Grid();
                    //grid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) });
                    //grid.RowDefinitions.Add(new RowDefinition { Height = new GridLength(1, GridUnitType.Star) });
                    //var ctrl = new DocumentPreviewControl
                    //{
                    //    CommandBarStyle = CommandBarStyle.None
                    //};
                    //grid.Margin = new Thickness(-3, -4, -3, -3);
                    //grid.Children.Add(ctrl);
                    //panel.Content = grid;

                    if (panel.Content is DocumentPreviewControl)
                    {
                        BeWoUtils.ShowReportWindow(ms, title, panel.Content as DocumentPreviewControl);
                    }
                });
            
        }

        private void RefreshInternalNews(List<NewsItemDC> news)
        {
            this.Dispatch(delegate
            {

                var team2News = new Dictionary<long, TeamNewsItemVM>();
                var allNews = new TeamNewsItemVM();
                allNews.Team = new CompactTeamDC();
                allNews.Team.Name = "Allgemein";
                allNews.AllowEdit = false;
                allNews.IsTitleVisible = true;

                foreach (var newsItemDc in news)
                {
                    if (newsItemDc.Team != null)
                    {
                        newsItemDc.AllowEdit = true;
                        newsItemDc.TitleString = String.Format("{0:dd.MM.yyyy}: {1}", newsItemDc.PublishDate,
                            newsItemDc.Title);
                        if (!team2News.ContainsKey(newsItemDc.Team.TeamOid))
                        {
                            team2News[newsItemDc.Team.TeamOid] = new TeamNewsItemVM();
                            team2News[newsItemDc.Team.TeamOid].Team = newsItemDc.Team;
                            team2News[newsItemDc.Team.TeamOid].AllowEdit = true;
                            team2News[newsItemDc.Team.TeamOid].IsTitleVisible = true;
                        }
                        if (newsItemDc.NewsItemOid.HasValue)
                        {
                            team2News[newsItemDc.Team.TeamOid].NewsItems.Add(newsItemDc);
                        }
                    }
                    else
                    {
                        newsItemDc.TitleString = newsItemDc.Title;
                        allNews.NewsItems.Add(newsItemDc);
                    }
                }

                var list = team2News.Values.OrderBy(i => i.Team.Name).ToList();

                if (list.Count == 0)
                    allNews.IsTitleVisible = false;
                list.Add(allNews);

                InternalNewsGrid.Children.Clear();
                InternalNewsGrid.Children.Add(CreateInternalNewsControlList(list));
                //ListboxInternalNews.ItemsSource = list;

            });
        }

        private UIElement CreateInternalNewsControlList(List<TeamNewsItemVM> list)
        {
            bool expand = true;

            if (_NewsItemExpandedState.Count == 0)
            {
                if (list != null && list.Count > 1)
                {
                    int count = 0;
                    foreach (var teamNewsItemVm in list)
                    {
                        if (teamNewsItemVm.NewsItems != null)
                        {
                            count += teamNewsItemVm.NewsItems.Count;
                        }
                    }

                    if (count > 10)
                    {
                        expand = false;
                    }
                }
            }



            StackPanel sp = new StackPanel();
            foreach (var teamNewsItemVm in list)
            {
                sp.Children.Add(CreateInternalNewsTeamControl(teamNewsItemVm, expand));
            }
            return sp;
        }

        private UIElement CreateInternalNewsTeamControl(TeamNewsItemVM teamNewsItemVm, bool initExpand)
        {
            var sp = new StackPanel();
            foreach (var newsItem in teamNewsItemVm.NewsItems)
            {
                sp.Children.Add(CreateInternalNewsControl(newsItem));
            }


            if (teamNewsItemVm.IsTitleVisible)
            {
                Expander ex = new Expander();

                ex.Style = (Style)FindResource("FlatLineExpander");

                bool expanded = initExpand;

                if (_NewsItemExpandedState.ContainsKey(teamNewsItemVm.Team.Name))
                {
                    expanded = _NewsItemExpandedState[teamNewsItemVm.Team.Name];
                }

                ex.IsExpanded = expanded;
                ex.Margin = new Thickness(0, 5, 5, 5);

                Grid grid = new Grid();
                grid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Auto) });
                grid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) });
                TextBlock tb = new TextBlock();
                tb.FontSize = 14;
                tb.FontWeight = FontWeights.Bold;
                tb.Text = teamNewsItemVm.Team.Name;
                grid.Children.Add(tb);

                if (teamNewsItemVm.AllowEdit)
                {
                    Button newBtn = new Button();
                    newBtn.Style = (Style)FindResource("FlatButton");
                    newBtn.SetValue(Grid.ColumnProperty, 1);
                    newBtn.HorizontalAlignment = System.Windows.HorizontalAlignment.Right;
                    newBtn.Width = 16;
                    newBtn.Height = 16;
                    newBtn.Click += BtnCreateNewsItem_OnClick;
                    newBtn.Tag = teamNewsItemVm;
                    newBtn.Margin = new Thickness(0, 0, -10, 0);

                    Image img = new Image();
                    img.Source = new BitmapImage(new Uri(@"..\..\Ressources\Icons\new.png", UriKind.Relative));
                    img.Stretch = Stretch.Uniform;
                    newBtn.Content = img;
                    grid.Children.Add(newBtn);
                }

                ex.Header = grid;
                ex.Content = sp;
                return ex;
            }
            return sp;
        }

        private UIElement CreateInternalNewsControl(NewsItemDC newsItem)
        {
            Grid grid = new Grid();
            grid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) });
            grid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Auto) });
            grid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Auto) });

            grid.RowDefinitions.Add(new RowDefinition { Height = new GridLength(25, GridUnitType.Pixel) });
            grid.RowDefinitions.Add(new RowDefinition { Height = new GridLength(1, GridUnitType.Star) });
            grid.Margin = new Thickness(0, 5, 0, 0);

            TextBlock tb = new TextBlock();
            tb.Margin = new Thickness(0, 5, 0, 0);
            tb.Foreground = new SolidColorBrush(Color.FromRgb(43, 80, 139));
            tb.Text = newsItem.TitleString;
            tb.FontSize = 12;
            tb.FontWeight = FontWeights.Bold;
            grid.Children.Add(tb);

            tb = new TextBlock();
            tb.Text = newsItem.Text;
            tb.FontSize = 10;
            tb.TextWrapping = TextWrapping.Wrap;
            tb.SetValue(Grid.RowProperty, 1);
            tb.SetValue(Grid.ColumnSpanProperty, 3);
            grid.Children.Add(tb);

            if (newsItem.AllowEdit)
            {
                //	<DataTemplate.Triggers>
                //													<Trigger Property="IsMouseOver" Value="True">
                //														<Setter Property="Visibility" TargetName="btnEditNewsItem" Value="{Binding Path=AllowEdit, Converter={StaticResource BoolVisibilityConverter}}" />
                //														<Setter Property="Visibility" TargetName="btnDeleteNewsItem" Value="{Binding Path=AllowEdit, Converter={StaticResource BoolVisibilityConverter}}" />
                //													</Trigger>
                //												</DataTemplate.Triggers>

                Border b = new Border();
                b.Background = Brushes.Transparent;
                b.SetValue(Grid.ColumnProperty, 1);
                grid.Children.Add(b);
                //	<Border Grid.Column="1" Background="Transparent">
                //													</Border>

                Button editBtn = new Button();
                editBtn.BorderThickness = new Thickness(1, 1, 1, 1);
                editBtn.Padding = new Thickness(1, 1, 1, 1);
                editBtn.Style = (Style)FindResource("FlatButton");
                editBtn.SetValue(Grid.ColumnProperty, 1);
                editBtn.VerticalAlignment = VerticalAlignment.Top;
                editBtn.Width = 16;
                editBtn.Height = 16;
                editBtn.Click += BtnEditNewsItem_OnClick;
                editBtn.Tag = newsItem;
                editBtn.Visibility = Visibility.Hidden;

                Image img = new Image();
                img.Source = new BitmapImage(new Uri(@"..\..\Ressources\Icons\edit.png", UriKind.Relative));
                img.Stretch = Stretch.Uniform;
                img.Margin = new Thickness(1, 1, 1, 1);
                editBtn.Content = img;
                grid.Children.Add(editBtn);


                b = new Border();
                b.Background = Brushes.Transparent;
                b.SetValue(Grid.ColumnProperty, 2);
                grid.Children.Add(b);

                Button deleteBtn = new Button();
                deleteBtn.Padding = new Thickness(1, 1, 1, 1);
                deleteBtn.Style = (Style)FindResource("FlatButton");
                deleteBtn.SetValue(Grid.ColumnProperty, 2);
                deleteBtn.VerticalAlignment = VerticalAlignment.Top;
                deleteBtn.Width = 16;
                deleteBtn.Height = 16;
                deleteBtn.Click += BtnDeleteNewsItem_OnClick;
                deleteBtn.Tag = newsItem;
                deleteBtn.Visibility = Visibility.Hidden;

                img = new Image();
                img.Source = new BitmapImage(new Uri(@"..\..\Ressources\Icons\delete.png", UriKind.Relative));
                img.Stretch = Stretch.Uniform;
                img.Margin = new Thickness(1, 1, 1, 1);
                deleteBtn.Content = img;
                grid.Children.Add(deleteBtn);

                grid.MouseEnter += (s, e) =>
                {
                    editBtn.Visibility = Visibility.Visible;
                    deleteBtn.Visibility = Visibility.Visible;
                };

                grid.MouseLeave += (s, e) =>
                {
                    editBtn.Visibility = Visibility.Hidden;
                    deleteBtn.Visibility = Visibility.Hidden;
                };
            }
            //<Border Grid.Column="1" Background="Transparent">
            //</Border>
            //<Button Grid.Column="1" x:Name="btnEditNewsItem" BorderThickness="1,1,1,1" Padding="1,1,1,1" Style="{DynamicResource FlatButton}" Tag="{Binding}" VerticalAlignment="Top"
            //		Width="16" Height="16" Click="BtnEditNewsItem_OnClick" Visibility="Hidden">
            //	<Image Source="..\..\Ressources\Icons\edit.png" Stretch="Uniform" Margin="1,1,1,1" />
            //</Button>


            //<Border Grid.Column="2" Background="Transparent">
            //</Border>
            //<Button Grid.Column="2" x:Name="btnDeleteNewsItem" BorderThickness="1,1,1,1" Padding="1,1,1,1" Style="{DynamicResource FlatButton}" Tag="{Binding}" VerticalAlignment="Top"
            //		Width="16" Height="16" Click="BtnDeleteNewsItem_OnClick" Visibility="Hidden">
            //	<Image Source="..\..\Ressources\Icons\delete.png" Stretch="Uniform" Margin="1,1,1,1" />
            //</Button>


            return grid;
        }

        private void BuildRecurringAppointments(List<SchedulerAppointmentDC> pRecurringAppointments, DateTime pStartDate, DateTime pEndDate)
        {
            var patternToExceptions = new List<RecurringAppointment>();
            var recurrenceInterval = new TimeInterval(pStartDate, pEndDate - pStartDate);

            var scheduler = new SchedulerControl();

            foreach (var appointment in pRecurringAppointments.OrderBy(o => o.Type))
            {
                if (appointment.Type == (int)AppointmentType.Pattern)
                {
                    var id = Utils.ExtractIdFromRecurrenceInfo(appointment.RecurrenceInfo);

                    var dict = new Dictionary<int, SchedulerAppointmentDC>();

                    foreach (var iapp in pRecurringAppointments.Where(w => w.RecurrenceInfo.Contains(id) && w.Type != (int)AppointmentType.Pattern))
                    {
                        var idx = Utils.ExtractIndexFromRecurrenceInfo(iapp.RecurrenceInfo);
                        if (!dict.ContainsKey(idx))
                        {
                            dict.Add(idx, iapp);
                        }
                       
                    }
                        
                    var ra = new RecurringAppointment(id, dict, appointment);
                    patternToExceptions.Add(ra);
                }
            }

            foreach (var appointment in patternToExceptions)
            {
                var patternAppointment = appointment.Pattern;

                var recurrenceInfo = RecurrenceInfoXmlPersistenceHelper.ObjectFromXml(patternAppointment.RecurrenceInfo);
                var instance = OccurrenceCalculator.CreateInstance(recurrenceInfo);

                scheduler.Storage = new SchedulerStorage();

                var pattern = scheduler.Storage.CreateAppointment(AppointmentType.Pattern, appointment.Pattern.StartDate.Value, appointment.Pattern.EndDate.Value);

                var occurrences = instance.CalcOccurrences(recurrenceInterval, pattern);

                foreach (var devExpressAppointment in occurrences)
                {
                    var index = devExpressAppointment.RecurrenceIndex;

                    if (index == 0 && appointment.Occurrences.ContainsKey(0))
                    {
                        _AllSchedulerTasks.Remove(appointment.Pattern);
                    }

                    var indizes = appointment.Occurrences.Keys.ToList();

                    if (indizes.Contains(index) || devExpressAppointment.Type == AppointmentType.Occurrence && devExpressAppointment.RecurrenceIndex == 0)
                    {
                        continue;
                    }

                    var occurrence = new SchedulerAppointmentDC
                    {
                        CustomerList = patternAppointment.CustomerList,
                        AllDay = patternAppointment.AllDay,
                        EndDate = devExpressAppointment.End,
                        RecurrenceInfo = devExpressAppointment.RecurrenceInfo.ToXml(),
                        StartDate = devExpressAppointment.Start,
                        Type = (int)AppointmentType.Occurrence,
                        CompletedDate = patternAppointment.CompletedDate,
                        Description = patternAppointment.Description,
                        DueDate = patternAppointment.DueDate,
                        EmployeeList = patternAppointment.EmployeeList,
                        CompletedNotice = patternAppointment.CompletedNotice,
                        FormerBookingSequenceOid = patternAppointment.FormerBookingSequenceOid,
                        FormerTaskOid = patternAppointment.FormerTaskOid,
                        IsPrivate = patternAppointment.IsPrivate,
                        IsTeilnahmeBestaetigung = patternAppointment.IsTeilnahmeBestaetigung,
                        SupportConceptList = patternAppointment.SupportConceptList,
                        TaskDescription = patternAppointment.TaskDescription,
                        IsTask = patternAppointment.IsTask,
                        ResourceList = patternAppointment.ResourceList,
                        Originator = patternAppointment.Originator,
                        Subject = patternAppointment.Subject,
                        Location = patternAppointment.Location,
                        Status = patternAppointment.Status,
                        LabelId = patternAppointment.LabelId,
                        RecurrenceIndex = devExpressAppointment.RecurrenceIndex,
                        RecurrenceId = appointment.RecurrenceId
                    };

                    _AllSchedulerTasks.Add(occurrence);
                }
            }
        }

        private void LoadFeed()
        {

            String url = BeWoApp.Mandator.RssFeedUrl;

            if (String.IsNullOrEmpty(url))
            {
                ServiceFacade.DoDownloadServiceAsync(
                    dwn =>
                    {
                        try
                        {
                            return dwn.ReadRssFeed(null);
                        }
                        catch (Exception)
                        {
                        }

                        return null;
                    },
                    ReloadRssFeed);
            }
            else
            {
                ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;

                RssFeed feed = new RssFeed();

                RssManager mgr = new RssManager(url);
                feed.Items = mgr.GetFeed();
                feed.Title = mgr.FeedTitle;
                feed.Description = mgr.FeedDescription;

                ReloadRssFeed(feed, false);
            }
        }

        private void ShowAppointments(bool pShouldShowAppointments)
        {
            TimeIntervalNavigationStackPanel.Visibility = pShouldShowAppointments ? Visibility.Visible : Visibility.Collapsed;
            TimeIntervalBackButton.Visibility = pShouldShowAppointments ? Visibility.Visible : Visibility.Collapsed;
            AppointmentDateTextBlock.Visibility = pShouldShowAppointments ? Visibility.Visible : Visibility.Collapsed;
            TimeIntervalForwardsButton.Visibility = pShouldShowAppointments ? Visibility.Visible : Visibility.Collapsed;

            if (pShouldShowAppointments)
            {
                CurrentDate = DateTime.Today;
                UpdateAppointmentDateTextBlock(null);
            }
        }

        private void UpdateAppointmentDateTextBlock(DateTime? pDate)
        {
            var date = pDate ?? DateTime.Today;

            var weekOfYear = date.GetIso8601WeekOfYear().ToString();
            var dayOfWeek = date.ToString("dddd");

            AppointmentDateTextBlock.Text = $"KW {weekOfYear}, {dayOfWeek} ";

            LoadTasksAndAppointments(false);
        }

        private void LoadTasksAndAppointments(bool pIsShowingTasks, bool pForceUpdate = false)
        {
            if (_CurrentDate < _BufferDate || _CurrentDate > _BufferDate.AddDays(3 * Datebuffer) || pForceUpdate)
            {
                _BufferDate = _CurrentDate.AddDays(-1 * Datebuffer);

                ServiceFacade.DoResourceServiceAsync(s => s.LoadTasksAndAppointmentsForEmployee(BeWoApp.LoggedOnEmployeeOid.Value, _CurrentDate, Datebuffer, _SelectedEmployeeForAppointments?.EmployeeOid), cb =>
                {
                    this.Dispatch(delegate
                    {
                        _AllSchedulerTasks = cb;

                        BuildRecurringAppointments(_AllSchedulerTasks.Where(w => w.RecurrenceInfo != null).ToList(), _CurrentDate, _CurrentDate.AddDays(3 * Datebuffer));

                        if (pIsShowingTasks)
                        {
                            listboxTasks.ItemsSource = _AllSchedulerTasks.Where(i => i.IsTask && !i.CompletedDate.HasValue).OrderBy(i => i.DueDate).OrderBy(o => o.StartDate ?? DateTime.MinValue).ToList();
                        }
                        else
                        {
                            listboxTasks.ItemsSource = _AllSchedulerTasks.Where(i => !i.IsTask &&
                                                                                     i.StartDate.HasValue && i.StartDate.Value.InBetween(_CurrentDate, _CurrentDate.AddDays(14), true) &&
                                                                                     i.EndDate.HasValue && i.EndDate.Value.InBetween(_CurrentDate, _CurrentDate.AddDays(14), true) &&
                                                                                     i.Type != (int)AppointmentType.DeletedOccurrence).OrderBy(o => o.StartDate ?? DateTime.MinValue).ToList();
                        }
                    });
                }, false);
            }
            else
            {
                if (pIsShowingTasks)
                {
                    listboxTasks.ItemsSource = _AllSchedulerTasks.Where(i => i.IsTask && !i.CompletedDate.HasValue).OrderBy(i => i.DueDate).OrderBy(o => o.StartDate ?? DateTime.MinValue).ToList();
                }
                else
                {
                    listboxTasks.ItemsSource = _AllSchedulerTasks.Where(i => !i.IsTask &&
                                                                             i.StartDate.HasValue && i.StartDate.Value.InBetween(_CurrentDate, _CurrentDate.AddDays(14), true) &&
                                                                             i.EndDate.HasValue && i.EndDate.Value.InBetween(_CurrentDate, _CurrentDate.AddDays(14), true) &&
                                                                             i.Type != (int)AppointmentType.DeletedOccurrence).OrderBy(o => o.StartDate ?? DateTime.MinValue).ToList();

                    foreach (var app in listboxTasks.ItemsSource)
                    {
                        var a = (SchedulerAppointmentDC)app;

                        if (a.IsTask || a.RecurrenceInfo == null)
                        {
                            continue;
                        }
                    }
                }
            }
        }

        private void ReloadRssFeed(RssFeed feed)
        {
            ReloadRssFeed(feed, true);
        }

        private void ReloadRssFeed(RssFeed feed, bool addBeWoParameter)
        {
            if (feed != null)
            {
                if (feed.Items != null && addBeWoParameter)
                {
                    foreach (RssItem rssItem in feed.Items)
                    {
                        if (!String.IsNullOrEmpty(rssItem.Link))
                        {
                            rssItem.Link += String.Format("&k={0}&s={1}", BeWoApp.Tenant, BeWoApp.ServerName);
                        }
                    }
                }
                this.Dispatch(delegate { listboxNews.ItemsSource = feed.Items; });
            }
        }

        private void ReloadBirthdays(List<CompactPersonDC> list)
        {
            this.Dispatch(
                delegate
                {
                    list.Sort((l1, l2) => l1.DateOfBirth.Value.DayOfYear.CompareTo(l2.DateOfBirth.Value.DayOfYear));
                    listboxBirthdays.ItemsSource = list;
                });
        }

        private void ReloadConferenceDates(List<CompactSupportConceptDC> list)
        {
            this.Dispatch(
                delegate
                {
                    list.Sort((l1, l2) => l1.ConferenceDate.Value.CompareTo(l2.ConferenceDate.Value));
                    listboxConferenceDates.ItemsSource = list;
                });
        }

        private void ReloadExpiringSupportConcepts(List<CompactSupportConceptDC> list)
        {
            this.Dispatch(
                delegate
                {
                    list.Sort((l1, l2) => l1.EndDate.Value.CompareTo(l2.EndDate.Value));

                    listboxExpiringSupportConcepts.ItemsSource = list;
                });
        }

        private void ReloadLogins(List<LoginDC> list)
        {
            this.Dispatch(
                delegate
                {
                    // listboxNews.ItemsSource = list;
                    list.Sort((l1, l2) => l1.LoginDate.Value.CompareTo(l2.LoginDate.Value));

                    if (list.Count > 0)
                    {
                        LoginDC last = list[list.Count - 1];
                        txtLoginTime.Text = "Angemeldet seit " + last.LoginDate.Value.ToShortDateString() + " " +
                                            last.LoginDate.Value.ToShortTimeString();
                        if (list.Count > 1)
                        {
                            LoginDC dc = list[list.Count - 2];

                            txtLastLoginTime.Text = ", zuletzt angemeldet am " + dc.LoginDate.Value.ToShortDateString() +
                                                    " " + dc.LoginDate.Value.ToShortTimeString();
                        }
                    }
                });
        }

        public void ReorderPanels()
        {
            var save = BeWoApp.AppSettings.StartupPanelOrder;
            var actual = PanelHost.Children.Cast<DragDockPanel>().Select(item => item.Name).ToList();

            if (save == null || save.Count != actual.Count || actual.Except(save).Any()) return;

            var panels = new Dictionary<string, DragDockPanel>();

            foreach (var item in PanelHost.Children)
            {
                var p = item as DragDockPanel;
                panels.Add(p.Name, p);
            }

            PanelHost.Children.Clear();

            save.DoForEach(x => PanelHost.AddPanel(panels[x]));

            
        }

        private void SetMaximizedPanel()
        {
            if (!string.IsNullOrEmpty(BeWoApp.AppSettings.StartupPanelMaximized))
            {
                foreach (object item in PanelHost.Children)
                {
                    var p = item as DragDockPanel;
                    if (BeWoApp.AppSettings.StartupPanelMaximized.Equals(p.Name))
                    {
                        //IEnumerable<DependencyObject> objekts = p.GetAllChildren();

                        //foreach (DependencyObject child in objekts)
                        //{
                        //    if (child is ToggleButton btn)
                        //    {
                        //        btn.IsChecked = true;
                        //    }
                        //}
                        p.PanelMaximized = true;
                    }
                }
            }
        }

        private void SaveNewsItem(NewsItemVM vm)
        {
            ServiceFacade.DoEmployeeServiceSync(s => s.InsertNewNewsItem(vm.CommitToDataContract()));
            UpdateInternalNews();
        }

        private void UpdateNewsItem(NewsItemVM vm)
        {
            ServiceFacade.DoEmployeeServiceSync(s => s.UpdateNewsItem(vm.CommitToDataContract()));
            UpdateInternalNews();
        }

        #endregion

        #region NotNeeded

        private delegate void loadFeed(string url);
        private List<TaskDC> _AllTasks;
        private bool _IsAllowedToSeeCustomerAppointments;
        private bool _IsAllowedToSeeResourceAppointments;

        private void PreparePanels()
        {
            ServiceFacade.DoOperationsServiceAsyncNoWait(
                s => s.GetUiElements(UiElementType.StartPanel, BeWoApp.LoggedOnUser.Employee.EmployeeOid, null, null),
                InitPanelsCallback, null);
        }

        private void FillOutbox()
        {
            // if (BeWoApp.LoggedOnUser.Employee != null)
            // {
            // BeWo.ServiceProxy.ServiceFacade.DoMailServiceAsync(
            // s => s.GetOutgoingMails(BeWoApp.LoggedOnUser.Employee.EmployeeOid),
            // result => this.Dispatcher.BeginInvoke(new Call(delegate()
            // {
            // outboxList.ItemsSource = result;
            // }))
            // );

            // }
            // }

            // private void FillInbox()
            // {
            // if (BeWoApp.LoggedOnUser.Employee != null)
            // {

            // BeWo.ServiceProxy.ServiceFacade.DoMailServiceAsync(
            // s => s.GetIncomingMails(BeWoApp.LoggedOnUser.Employee.EmployeeOid),
            // result => this.Dispatcher.BeginInvoke(new Call(delegate()
            // {
            // text.Text = GenerateMailText(result);
            // inboxList.ItemsSource = result;
            // }))
            // );
            // }
            // }

            // delegate void Call();

            // private static string GenerateMailText(List<MailDC> result)
            // {
            // //var builder = new StringBuilder();

            // //var unreadMails = result.Where(r => r.Status == null || r.Status == Status.unread).Count();
            // //builder.AppendLine("Sie haben " + unreadMails + "/" + result.Count + " Mails");

            // //foreach (var item in result)
            // //{
            // //    builder.AppendLine(item.Subject);
            // //}

            // //return builder.ToString();

            // var unreadMails = result.Where(r => r.Status == null || r.Status == Status.unread).Count();
            // return "Sie haben " + unreadMails + "/" + result.Count + " Mails";

            // }

            // private void ButtonNew_Click(object sender, RoutedEventArgs e)
            // {
            // OpenSendMailView();
            // //   throw new NotImplementedException();
            // }

            // private void OpenSendMailView()
            // {
            // BeWoApp.MainControl.NavigateTo(new SendMailView() { ParentView = this });
            // //throw new NotImplementedException();
            // }

            // private void ButtonReplyNew_Click(object sender, RoutedEventArgs e)
            // {
            // if (boxTabControl.SelectedIndex == 0)
            // {
            // if (inboxList.SelectedIndex < 0)
            // {
            // MessageBox.Show("Sie haben keine Nachricht ausgewählt");
            // return;
            // }

            // var mailDC = inboxList.SelectedItem as MailDC;

            // BeWoApp.MainControl.NavigateTo(new SendMailView(SendMailView.Mode.Reply, mailDC));
            // }
            // else
            // {
            // MessageBox.Show("Sie können nicht auf Ihre eigene Mail antworten");
            // }
            // }

            // private void ButtonForward_Click(object sender, RoutedEventArgs e)
            // {
            // if (boxTabControl.SelectedIndex == 0)
            // {
            // if (inboxList.SelectedIndex < 0)
            // {
            // MessageBox.Show("Sie haben keine Nachricht ausgewählt");
            // return;
            // }

            // var mailDC = inboxList.SelectedItem as MailDC;

            // BeWoApp.MainControl.NavigateTo(new SendMailView(SendMailView.Mode.Forward, mailDC));
            // }
            // else
            // {
            // MessageBox.Show("Sie können Ihre eigene Mail nicht wieterleiten");
            // }
            // }

            // private void ButtonDelete_Click(object sender, RoutedEventArgs e)
            // {
            // if (boxTabControl.SelectedIndex == 0)
            // {
            // if (inboxList.SelectedIndex < 0)
            // {
            // MessageBox.Show("Sie haben keine Nachricht ausgewählt");
            // return;
            // }

            // var mailDC = inboxList.SelectedItem as MailDC;

            // BeWo.ServiceProxy.ServiceFacade.DoMailServiceAsync(s => s.DeleteMail(BeWoApp.LoggedOnUser.Employee.EmployeeOid, mailDC));

            // //inboxList.ItemsSource.RemoveAt(inboxList.SelectedIndex);
            // FillInbox();
            // }
            // else
            // {
            // MessageBox.Show("Outbox funktioniert noch nicht");

            // //BeWo.ServiceProxy.ServiceFacade.DoMailServiceAsync(s => s.DeleteMail(BeWoApp.LoggedOnUser.Employee.EmployeeOid, outboxList.SelectedItem as MailDC);
            // }

            // //throw new NotImplementedException();
            // }

            // private void InboxItem_DoubleClick(object sender, RoutedEventArgs e)
            // {
            // var listboItem = sender as ListBoxItem;
            // var content = listboItem.Content as MailDC;

            // MainControl.NavigateTo(new ViewMailView(content) { ParentView = this });

            // //throw new NotImplementedException();
            // }

            // private void OutboxItem_DoubleClick(object sender, RoutedEventArgs e)
            // {
            // var listboItem = sender as ListBoxItem;
            // var content = listboItem.Content as MailDC;

            // MainControl.NavigateTo(new ViewMailView(content) { ParentView = this });
        }

        private void listboxBirthdays_MouseDoubleClick(object sender, MouseButtonEventArgs e)
        {
            //if (!IsPartOf(e.OriginalSource, typeof (ScrollBar)))
            //{
            //    var dc = ((ListBox) sender).SelectedItem as CompactPersonDC;

            //    if (dc != null)
            //    {
            //        if (dc.PersonType == PersonType.Customer)
            //        {
            //            if (BeWoApp.LoggedOnUser.HasRight(UserRightType.CustomerView_View) ||
            //                BeWoApp.LoggedOnUser.HasRight(UserRightType.ViewAll))
            //            {
            //                ServiceFacade.DoCustomerServiceAsync(
            //                    s => s.GetCustomerWithPersonOid(dc.PersonOid),
            //                    cb => VMFactory.CreateCustomerVMAsync(
            //                        cb,
            //                        cb2 => this.Dispatch(
            //                            delegate
            //                            {
            //                                MainControl.NavigateTo(
            //                                    new CustomerView(cb2)
            //                                    {
            //                                        ParentView = this
            //                                    });
            //                            })));
            //            }
            //        }
            //        else if (dc.PersonType == PersonType.Employee)
            //        {
            //            if (BeWoApp.LoggedOnUser.HasRight(UserRightType.EmployeeView_View) ||
            //                BeWoApp.LoggedOnUser.HasRight(UserRightType.ViewAll))
            //            {
            //                ServiceFacade.DoEmployeeServiceAsync(
            //                    s => s.GetEmployeeWithPersonOid(dc.PersonOid),
            //                    cb => VMFactory.CreateEmployeeVMAsync(
            //                        cb,
            //                        cb2 => this.Dispatch(
            //                            delegate
            //                            {
            //                                MainControl.NavigateTo(
            //                                    new EmployeeView(cb2)
            //                                    {
            //                                        ParentView = this
            //                                    });
            //                            })));
            //            }
            //        }
            //        else if (BeWoApp.LoggedOnUser.HasRight(UserRightType.PersonView_View) ||
            //                 BeWoApp.LoggedOnUser.HasRight(UserRightType.ViewAll))
            //        {
            //            VMFactory.CreatePersonVMAsync(
            //                dc.PersonOid,
            //                cb => this.Dispatch(
            //                    delegate
            //                    {
            //                        MainControl.NavigateTo(
            //                            new PersonView(cb)
            //                            {
            //                                ParentView = this
            //                            });
            //                    }));
            //        }
            //    }
            //}
        }

        #endregion
    }

    #region Structs

    public struct RecurringAppointment
    {
        public string RecurrenceId { get; set; }
        public Dictionary<int, SchedulerAppointmentDC> Occurrences { get; set; }
        public SchedulerAppointmentDC Pattern { get; set; }

        public RecurringAppointment(string pRecurrenceId, Dictionary<int, SchedulerAppointmentDC> pOccurrences, SchedulerAppointmentDC pPattern)
        {
            RecurrenceId = pRecurrenceId;
            Occurrences = pOccurrences;
            Pattern = pPattern;
        }
    }

    #endregion

    #region Classes

    public class TaskDateDescriptionConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value is SchedulerAppointmentDC task)
            {
                if (task.CompletedDate.HasValue)
                {
                    return $"erledigt am: {task.CompletedDate:d}";
                }

                if (task.DueDate.HasValue && task.DueDate.Equals(DateTime.MaxValue))
                {
                    return string.Empty;
                }

                if (task.DueDate.HasValue)
                {
                    return string.Format("bis {0:d} {0:t}", task.DueDate);
                }

                if (task.StartDate.HasValue)
                {
                    return task.AllDay ? $"{task.StartDate:d}" : $"{task.StartDate:d} {task.StartDate:t}";
                }
            }
            return string.Empty;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => throw new NotImplementedException();
    }

    public class TaskListItemBackgroundConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value is SchedulerAppointmentDC task && !task.IsTask)
            {
                if (parameter != null)
                {
                    switch (parameter.ToString())
                    {
                        case "ResourceBackgroundBrush":
                            return task.ResourceList?.Count > 0 ? task.ResourceList.First().GetBrush() : new SolidColorBrush(Color.FromArgb(0, 0, 0, 0));
                        case "CustomerBackgroundBrush":
                            return new SolidColorBrush(task.CustomerList?.Count > 0 ? Color.FromRgb(59, 119, 153) : Color.FromArgb(0, 0, 0, 0));
                        case "EmployeeBackgroundBrush":
                            return task.EmployeeList?.Count > 0 ? task.EmployeeList.First().Employee.FilterableBrush : task.Originator?.FilterableBrush ?? new SolidColorBrush(Color.FromArgb(0, 0, 0, 0));
                    }
                }

                return new LinearGradientBrush(Color.FromRgb(192, 255, 208), Color.FromRgb(192, 255, 208), new Point(0, 0), new Point(1, 1));
            }

            return new LinearGradientBrush(Color.FromRgb(153, 59, 59), Color.FromRgb(92, 25, 25), new Point(0, 0), new Point(0, 1));
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }

    public class BorderCornerRadiusConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            var fallbackCornerRadius = new CornerRadius(0, 5, 5, 0);

            if (value is SchedulerAppointmentDC appointment && !appointment.IsTask && parameter != null)
            {
                switch (parameter.ToString())
                {
                    case "Customers":
                        return appointment.CustomerList?.Count > 0 && appointment.ResourceList?.Count > 0 ? new CornerRadius(0, 5, 0, 0) : fallbackCornerRadius;
                    case "Resources":
                        return appointment.CustomerList?.Count > 0 && appointment.ResourceList?.Count > 0 ? new CornerRadius(0, 0, 5, 0) : fallbackCornerRadius;
                    default:
                        return fallbackCornerRadius;
                }
            }

            return fallbackCornerRadius;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => throw new NotImplementedException();
    }

    public class TaskListItemForegroundConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value is SchedulerAppointmentDC task && !task.IsTask)
            {
                return new SolidColorBrush(Color.FromRgb(0, 0, 0));
            }

            return new SolidColorBrush(Color.FromRgb(201, 210, 210));
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }

    public class TaskAppointmentVisibilityConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value is SchedulerAppointmentDC taskAppointment)
            {
                switch (parameter?.ToString())
                {
                    case "ToolTipTimeVisibility":
                        return taskAppointment.IsTask || taskAppointment.AllDay ? Visibility.Collapsed : Visibility.Visible;
                    case "ToolTipTrennstrichVisibility":
                        return !taskAppointment.IsTask && (taskAppointment.EmployeeList?.Count > 0 || taskAppointment.CustomerList?.Count > 0 || taskAppointment.ResourceList?.Count > 0) ? Visibility.Visible : Visibility.Collapsed;
                    case "ToolTipResourcesVisibility":
                        return !taskAppointment.IsTask && taskAppointment.ResourceList?.Count > 0 ? Visibility.Visible : Visibility.Collapsed;
                    case "ToolTipEmployeesVisibility":
                        return !taskAppointment.IsTask && taskAppointment.EmployeeList?.Count > 0 ? Visibility.Visible : Visibility.Collapsed;
                    case "ToolTipCustomersVisibility":
                        return !taskAppointment.IsTask && taskAppointment.CustomerList?.Count > 0 ? Visibility.Visible : Visibility.Collapsed;
                    case "ToolTipZusageVisibility":
                        return !taskAppointment.IsTask ? Visibility.Visible : Visibility.Collapsed;
                    case "ToolTipCustomerColorVisibility":
                        return !taskAppointment.IsTask && taskAppointment.CustomerList?.Count > 0 ? Visibility.Visible : Visibility.Collapsed;
                    case "ToolTipResourcesColorVisibility":
                        return !taskAppointment.IsTask && taskAppointment.ResourceList?.Count > 0 ? Visibility.Visible : Visibility.Collapsed;
                    case "CustomerBorderVisibility":
                        return !taskAppointment.IsTask && taskAppointment.CustomerList?.Count > 0 ? Visibility.Visible : Visibility.Collapsed;
                    case "ResourceBorderVisibility":
                        return !taskAppointment.IsTask && taskAppointment.ResourceList?.Count > 0 ? Visibility.Visible : Visibility.Collapsed;
                    case "EmployeeBorderVisibility":
                        return !taskAppointment.IsTask && taskAppointment.EmployeeList?.Count > 0 || taskAppointment.Originator != null ? Visibility.Visible : Visibility.Collapsed;
                }
            }

            return Visibility.Collapsed;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => throw new NotImplementedException();
    }

    public class TaskAppointmentToolTipConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value is SchedulerAppointmentDC taskAppointment)
            {
                if (!taskAppointment.IsTask)
                {
                    var custoemrs = taskAppointment.CustomerList;
                    var resources = taskAppointment.ResourceList;
                    var toolTip = string.Empty;
                    var seperator = "; ";
                    var selection = new List<IFilterableDC>();
                    var isResourceOrCustomer = false;

                    switch (parameter?.ToString())
                    {
                        case "TimeText":
                            return $"{taskAppointment.StartDate?.ToString("HH:mm")} - {taskAppointment.EndDate?.ToString("HH:mm")} Uhr";
                        case "ToolTip":
                            return taskAppointment.Subject;
                        case "Resources":
                            isResourceOrCustomer = true;
                            seperator = ", ";
                            if (resources != null)
                            {
                                selection = resources.Cast<IFilterableDC>().ToList();
                            }
                            break;
                        case "Employees":
                            return taskAppointment.EmployeeList;
                        case "Customers":
                            isResourceOrCustomer = true;
                            if (custoemrs != null)
                            {
                                selection = custoemrs.Cast<IFilterableDC>().ToList();
                            }
                            break;
                    }

                    if (isResourceOrCustomer)
                    {
                        foreach (var item in selection)
                        {
                            var index = selection.IndexOf(item);

                            if (index % 3 == 0 && index < selection.Count - 1 && index > 0)
                            {
                                toolTip += "\n";
                            }

                            toolTip += item.ToString();

                            if (index < selection.Count - 1)
                            {
                                toolTip += seperator;
                            }
                        }

                        return toolTip;
                    }
                }
                else
                {
                    switch (parameter?.ToString())
                    {
                        case "TimeText":
                            return string.Empty;
                    }
                }

                if (parameter != null && parameter.Equals("ToolTip"))
                {
                    return taskAppointment.IsTask ? taskAppointment.TaskDescription : taskAppointment.Description;
                }
            }

            return null;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => throw new NotImplementedException();
    }

    public class BorderHeightConverter : IMultiValueConverter
    {
        public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
        {
            const double fallbackValue = 0d;

            if (values.Length == 2)
            {
                var actualHeight = (double)values[0];
                var appointment = (SchedulerAppointmentDC)values[1];

                var newHeight = appointment?.CustomerList?.Count > 0 && appointment.ResourceList?.Count > 0 ? actualHeight / 2 : actualHeight;

                return newHeight;
            }

            return fallbackValue;
        }

        public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture) => throw new NotImplementedException();
    }

    #endregion
}