using BeWoPlanerMobil.Models;
using BeWoPlanerMobil.Service;
using BeWoPlanerMobil.Util;
using BeWoPlanerMobil.Util.Constants;
using BeWoPlanerMobil.Util.SchedulerUtils;
using BeWoPlanerMobil.Views.DevExpressScheduler;
using BS.Shared;
using BS.Shared.Core;
using BS.Shared.DataContracts;
using BS.Shared.DataContracts.Compact;
using BS.Shared.Extensions;
using DevExpress.Web.Mvc;
using DevExpress.XtraScheduler;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web.Mvc;

namespace BeWoPlanerMobil.Controllers
{
    /*
     * ToDo:
     *      1. Filterung einbauen (Mitarbeiter, Klienten, Ressourcen, Privat, Aufgaben, Abwesenheiten)
     *      2. "In die Zeiterfassung übertragen" und "Verfügbare Mitarbeiter prüfen" einbauen
     *      3. Rechte implementieren!
     *      4. Übersetzungen
     */

    public class DevExpressSchedulerController : AbstractBaseController
    {
        [Authorize]
        public override string SaveCollapsibleStatus(bool isOpen, string identifier)
        {
            return SaveCollapsibleStatusToModel(Model, isOpen, identifier);
        }

        private DevExpressSchedulerModel _Model;
        public DevExpressSchedulerModel Model
        {
            get
            {
                if(false == MobileSessionFacade.IsUserLoggedIn())
                {
                    Logout();
                    return null;
                }

                if(_Model != null)
                {
                    return _Model;
                }

                _Model = new DevExpressSchedulerModel();
                InitModel(_Model);
                InitViewModel();

                return _Model;
            }
        }

        private AppointmentModel _AppointmentModel;

        public AppointmentModel AppointmentModel
        {
            get
            {
                if(false == MobileSessionFacade.IsUserLoggedIn())
                {
                    Logout();
                    return null;
                }

                if(_AppointmentModel != null)
                {
                    return _AppointmentModel;
                }

                _AppointmentModel = new AppointmentModel();
                InitModel(_AppointmentModel);
                InitAppointmentModel();

                return _AppointmentModel;
            }
        }

        private void InitAppointmentModel()
        {
            AppointmentModel.PossibleEmployees = EmployeeService.GetAllAuthorizedCompactEmployees();
            AppointmentModel.PossibleCustomers = CustomerService.GetAllAuthorizedCompactCustomers();
            AppointmentModel.PossibleResources = KalenderService.GetAllResources();
        }

        private void InitViewModel()
        {
            if(false == MobileSessionFacade.IsUserLoggedIn() || Request.Browser.Browser.Equals("InternetExplorer") || Model?.LoggedInEmployee?.EmployeeOid is null)
            {
                Logout();
                return;
            }

            var userSettings = LoggedInUser?.Settings.FirstOrDefault(f => f.Type.Equals(SettingsType.ApplicationSettings))?.Value;

            Model.ShowOnlyMyOwnAppointments = UserSettingsUtils.GetSettingValueAsBool(userSettings, SettingsKeys.ZeigeNurMeineTermine);

            if(Model.ShowOnlyMyOwnAppointments && LoggedInUser != null)
            {
                Model.SelectedEmployeeOidsForFiltering = new List<long> { LoggedInUser.Employee.EmployeeOid };
            }

            Model.PossibleEmployees = EmployeeService.GetAllAuthorizedCompactEmployees();
            Model.PossibleCustomers = CustomerService.GetAllAuthorizedCompactCustomers();
            Model.PossibleResources = KalenderService.GetAllResources();

            if(Model.HasRightToInsertRessourceAppointments || Model.HasRightToViewAllResourceAppointments)
            {
                var allResources = KalenderService.GetAllResources().OrderBy(r => r.Name).ToList();

                var categories2Resources = new Dictionary<ValueListEntryDC, List<ResourceDC>>();

                foreach(var category in allResources.Select(resource => resource.ResourceCategory))
                {
                    categories2Resources.AddOrUpdateValueInDictionary(category, allResources.Where(resource => resource.ResourceCategory.Equals(category)).OrderBy(r => r.Name).ToList());
                }

                Model.ResourceCategories2Resources = categories2Resources.OrderBy(kvp => kvp.Key.DisplayName).ToDictionary(kvp => kvp.Key, kvp => kvp.Value);
            }

            if(Model.LoggedInEmployee?.EmployeeOid.HasValue ?? false)
            {
                var compactEmployee = EmployeeService.GetActiveCompactEmployeeWithOid(Model.LoggedInEmployee.EmployeeOid.Value);

                Model.MyTeamEmployees = EmployeeService.GetAllTeamMember(compactEmployee).OrderBy(employee => employee.LastName).ToList();
            }
            else
            {
                Model.MyTeamEmployees = new List<CompactEmployeeDC>();
            }

            if(Model.HasRightToViewTeams && (Model?.LoggedInEmployee?.EmployeeOid.HasValue ?? false))
            {
                Model.MyTeams = EmployeeService.GetAllActiveCompactTeamsForEmployee(Model.LoggedInEmployee.EmployeeOid.Value).OrderBy(team => team.Name).ToList();
            }

            Model.TeamMemberCustomerOids = EmployeeService.LoadTeamsRelatedCustomerOids(LoggedInUser.Employee.EmployeeOid);

            Model.SelectedEmployeesForFiltering = Model.PossibleEmployees.Where(possibleEmployee => Model.SelectedEmployeeOidsForFiltering?.Contains(possibleEmployee.EmployeeOid) ?? false).ToList();
            Model.SelectedCustomersForFiltering = Model.PossibleCustomers.Where(possibleCustomer => Model.SelectedCustomerOidsForFiltering?.Contains(possibleCustomer.CustomerOid) ?? false).ToList();
            Model.SelectedResourcesForFiltering = Model.PossibleResources.Where(possibleResource => possibleResource.ResourceOid.HasValue && (Model.SelectedResourceOidsForFiltering?.Contains(possibleResource.ResourceOid.Value) ?? false)).ToList();

            ReloadAppointments();
        }

        private void ReloadAppointments()
        {
            if(Model.LoggedInEmployee.EmployeeOid is null)
            {
                throw new Exception("Bei DevExpressSchedulerController.ReloadAppointments() ist die Oid des angemeldeten Benutzers wider Erwarten NULL!");
            }

            UpdateSelectedObjects();

            var employeeOid = Model.LoggedInEmployee.EmployeeOid.Value;

            var user = LoggedInUser;
            var userSettings = user?.Settings.FirstOrDefault(f => f.Type.Equals(SettingsType.ApplicationSettings))?.Value;

            Model.CurrentViewType = (SchedulerViewType) UserSettingsUtils.GetSettingValueAsInteger(userSettings, SettingsKeys.SchedulerViewType);
            
            var intervalStart = DateTimeExtensions.GetDayOfWeek(DayOfWeek.Monday);
            var intervalEnd = intervalStart.AddDays(7);

            var appointments = KalenderService.LoadFilteredAppointmentsMitAufgaben
            (
                Model.HasRightKalenderMitarbeitertermineAnsehen,
                employeeOid,
                intervalStart,
                intervalEnd,
                Model.SelectedEmployeeOidsForFiltering,
                Model.SelectedCustomerOidsForFiltering,
                Model.SelectedResourceOidsForFiltering,
                Model.ShowOnlyEmployees,
                Model.ShowOnlyCustomers,
                Model.ShowOnlyResources,
                Model.ShowOnlyPrivateAppointments,
                Model.ShowOnlyMyOwnAppointments,
                Model.ShowTasks
            );

            var selectedCustomerOids = Model.PossibleCustomers.Select(s => s.CustomerOid).ToList();
            var selectedEmployeeOids = Model.PossibleEmployees.Select(s => s.EmployeeOid).ToList();

            var customerAbsenceTimes = KalenderService.GetAllActiveCustomersAbsenceTimesInInterval(intervalStart, intervalEnd, employeeOid, selectedCustomerOids);
            var employeeAbsenceTimes = KalenderService.GetAllActiveEmployeeAbsenceTimesInInterval(intervalStart, intervalEnd, employeeOid, selectedEmployeeOids);

            if(Model.ShowAbsenceTimes)
            {
                var allAbsenceTimes = new List<AbsenceTimeDC>();
                allAbsenceTimes.AddRange(customerAbsenceTimes);
                allAbsenceTimes.AddRange(employeeAbsenceTimes);

                appointments.AddRange(ConvertAbsenceTimesToAppointments(allAbsenceTimes, Model.PossibleCustomers, Model.PossibleEmployees));
            }

            Model.Appointments = appointments;

            LoadNotificationCount();
        }

        [Authorize]
        public ActionResult GetNotifications()
        {
            LoadNotificationCount();

            return PartialView("SchedulerNotificationPartial", Model);
        }

        private int LoadNotificationCount()
        {
            Model.OpenAppointments = KalenderService.GetAllOpenAppointmentsForEmployee(LoggedInUser.Employee.EmployeeOid);

            return Model.NotificationCount;
        }

        private List<SchedulerAppointmentDC> ConvertAbsenceTimesToAppointments(List<AbsenceTimeDC> absenceTimes, List<CompactCustomerDC> allCustomers, List<CompactEmployeeDC> allEmployees)
        {
            var appointments = new List<SchedulerAppointmentDC>();

            foreach(var absenceTime in absenceTimes)
            {
                var subject = $"{absenceTime.Reason.Description}";
                var employee = absenceTime.EmployeeOid.HasValue ? allEmployees.FirstOrDefault(f => f.EmployeeOid == absenceTime.EmployeeOid.Value) : null;
                var customer = absenceTime.CustomerOid.HasValue ? allCustomers.FirstOrDefault(f => f.CustomerOid == absenceTime.CustomerOid.Value) : null;
                var allDay = absenceTime.IsAllDay;

                var isEmployeeAbsenceTime = absenceTime.EmployeeOid.HasValue;

                IFilterableDC dc = employee;
                var originator = employee;
                if(false == isEmployeeAbsenceTime)
                {
                    dc = customer;
                    originator = EmployeeService.FindCompactEmployeeByFullname(absenceTime.InsUser);
                }

                if(false == dc is null)
                {
                    subject += $" ({dc.SimpleDescription})";
                }

                var absenceTimeEnd = absenceTime.End;
                var end = absenceTime.End ?? DateTime.MaxValue;

                var isMultipleDayAbsenceTime = absenceTime.End is null || absenceTime.Start.Value.Date != absenceTime.End.Value.Date;

                if(isMultipleDayAbsenceTime && allDay && end != DateTime.MaxValue)
                {
                    absenceTimeEnd = end.AddDays(1);
                }

                if(originator is null)
                {
                    originator = LoggedInUser.Employee;
                }

                var appointment = new SchedulerAppointmentDC
                {
                    AbsenceReason = absenceTime.Reason,
                    AllDay = true,
                    Description = absenceTime.Notice,
                    StartDate = absenceTime.Start,
                    EndDate = absenceTimeEnd,
                    ActivationType = ActivationTypeId.Active,
                    FormerAbsenceTimeOid = absenceTime.AbsenceTimeOid,
                    Originator = originator,
                    Subject = subject,
                    Krankheitsmeldung = absenceTime.KrankheitsMeldung,
                    IsAbsenceTime = true
                };

                if(false == customer is null && employee is null)
                {
                    appointment.CustomerList = new List<CompactCustomerDC> { customer };
                }

                appointments.Add(appointment);
            }

            return appointments;
        }

        [Authorize]
        public ActionResult DevExpressScheduler()
        {
            if(false == MobileSessionFacade.IsUserLoggedIn() || Model is null)
            {
                return RedirectToActionPermanent("Index", "Login");
            }

            Model.Resources = new List<object>();

            return View(Model);
        }

        [Authorize]
        public ActionResult SchedulerPagePartial()
        {
            return PartialView("SchedulerPagePartial", Model);
        }

        [Authorize]
        public ActionResult EditAppointment()
        {
            UpdateAppointment();
            return PartialView("SchedulerPagePartial", Model);
        }

        [Authorize]
        private void UpdateAppointment()
        {
            var appointmentsToInsert = SchedulerExtension.GetAppointmentsToInsert<SchedulerAppointmentDC>(
                "scheduler",
                Model.Appointments,
                SchedulerHelper.DefaultAppointmentStorage,
                SchedulerHelper.DefaultResourceStorage);

            var appointmentsToUpdate = SchedulerExtension.GetAppointmentsToUpdate<SchedulerAppointmentDC>(
                "scheduler",
                Model.Appointments,
                SchedulerHelper.DefaultAppointmentStorage,
                SchedulerHelper.DefaultResourceStorage
                );

            var appointmentsToRemove = SchedulerExtension.GetAppointmentsToRemove<SchedulerAppointmentDC>(
                "scheduler",
                Model.Appointments,
                SchedulerHelper.DefaultAppointmentStorage,
                SchedulerHelper.DefaultResourceStorage
                );

            foreach(var appointment in appointmentsToInsert)
            {
                appointment.CustomerList = AppointmentModel.SelectedCustomers;
                appointment.ResourceList = AppointmentModel.SelectedResources;

                appointment.EmployeeList = new List<Employee2SchedulerAppointmentDC>();

                foreach(var selectedEmployee in AppointmentModel.SelectedEmployees ?? new List<CompactEmployeeDC>())
                {
                    appointment.EmployeeList.Add(new Employee2SchedulerAppointmentDC { Employee = selectedEmployee });
                }

                appointment.Originator = Model.LoggedInUser.Employee;
                
                KalenderService.InsertSchedulerAppointment(appointment);
                ViewData["EditableAppointmentModel"] = appointment;
            }

            foreach(var appointment in appointmentsToUpdate)
            {
                if(AppointmentModel.SelectedCustomers != null)
                {
                    appointment.CustomerList = AppointmentModel.SelectedCustomers;
                }

                if(AppointmentModel.SelectedResources != null)
                {
                    appointment.ResourceList = AppointmentModel.SelectedResources;
                }

                if(AppointmentModel.SelectedEmployees != null)
                {
                    appointment.EmployeeList = new List<Employee2SchedulerAppointmentDC>();

                    foreach(var selectedEmployee in AppointmentModel.SelectedEmployees)
                    {
                        appointment.EmployeeList.Add(new Employee2SchedulerAppointmentDC { Employee = selectedEmployee });
                    }
                }

                appointment.ActivationType = ActivationTypeId.Active;

                KalenderService.UpdateSchedulerAppointments(new List<SchedulerAppointmentDC> { appointment });
            }

            KalenderService.DeleteSchedulerAppointments(
                appointmentsToRemove
                    .Where(appointment => appointment.SchedulerAppointmentOid.HasValue && appointment.NewSchedulerAppointmentVersion.HasValue)
                    .ToDictionary(k => k.SchedulerAppointmentOid.Value, v => v.NewSchedulerAppointmentVersion.Value));

            ReloadAppointments();
        }

        [HttpPost]
        public ActionResult CustomerMultiSelectPartial(string value)
        {
            var selectedCustomerOids = GridLookupExtension.GetSelectedValues<long?>("CustomerGridLookup") ?? Array.Empty<long?>();

            AppointmentModel.SelectedCustomerOids = selectedCustomerOids.Where(oid => oid.HasValue).Select(oid => oid.Value).ToList();

            return PartialView("CustomerMultiSelectPartial", AppointmentModel);
        }

        [HttpPost]
        public ActionResult ResourceGridLookupPartial(string value)
        {
            var selectedResourceOids = GridLookupExtension.GetSelectedValues<long?>("ResourceGridLookup") ?? Array.Empty<long?>();

            AppointmentModel.SelectedResourceOids = selectedResourceOids.Where(oid => oid.HasValue).Select(oid => oid.Value).ToList();

            return PartialView("ResourceMultiSelectPartial", AppointmentModel);
        }

        [HttpPost]
        public ActionResult EmployeeGridLookupPartial(string value)
        {
            /*
             * Im AppointmentModel müssen die PossibleEmployees bleiben, denn daraus wählt man die Mitarbeiter, die noch nicht mit dem Termin
             * verknüpft sind und es müssen - zumindest beim Bearbeiten - die bereits mit dem Termin verbundenen Mitarbeiter-zu-Termin-Relationen
             * zwischengespeichert werden.
             *
             */
            var selectedEmployeeOids = GridLookupExtension.GetSelectedValues<long?>("EmployeeGridLookup") ?? Array.Empty<long?>();

            AppointmentModel.SelectedEmployeeOids = selectedEmployeeOids.Where(oid => oid.HasValue).Select(oid => oid.Value).ToList();

            return PartialView("EmployeeMultiSelectPartial", AppointmentModel);
        }

        [Authorize]
        public string SelectActiveViewType(string viewTypeName)
        {
            if(Enum.TryParse<SchedulerViewType>(viewTypeName, out var viewType))
            {
                Model.CurrentViewType = viewType;

                UpdateUserSettingsWithoutReload(SettingsKeys.SchedulerViewType, ((int) viewType).ToString());
            }

            return LeerzeichenFuerGetMethoden;
        }

        /// <summary>
        /// Hier laufen Custom-Aufrufe drüber ab. Im JavaScript mit scheduler.PerformCallback(...) aufrufen.
        /// </summary>
        /// <param name="apptID">Etwaige Id des Termin-Objekts</param>
        /// <param name="actionId">Die Id der auszuführenden Methode</param>
        /// <param name="args">Etwaige Parameter für die auszuführende Methode</param>
        /// <returns>Entweder das Scheduler-Partial oder ein anderer Seitenaufruf.</returns>
        [Authorize]
        public ActionResult CustomCallbackAction(string apptID, string actionId, string[] args)
        {
            switch(actionId)
            {
                case "ToServiceRecord":
                    return ToServiceRecord(apptID, actionId, args);
                case "FilterAppointments":
                    return FilterAppointments(args.Length >= 1 ? args[0] : null);
                case "Reload":
                    ReloadAppointments();
                break;
            }

            return PartialView("SchedulerPagePartial", Model);
        }

        [Authorize]
        private ActionResult ToServiceRecord(string apptID, string actionId, string[] args)
        {
            long? selectedAppointmentOid;
            var isRecurring = false;

            // Serientermin
            if(apptID.Contains("_"))
            {
                var splitApptId = apptID.Split('_');

                selectedAppointmentOid = long.Parse(splitApptId[0]);
                var recurrenceIndex = int.Parse(splitApptId[1]);

                TempData[TempDataConstants.AppointmentRecurrenceIndexKey] = recurrenceIndex;
            }
            else
            {
                selectedAppointmentOid = long.Parse(apptID);
            }

            var appointment = selectedAppointmentOid.HasValue ? Model.GetAppointmentByOid(selectedAppointmentOid.Value) : null;

            TempData[TempDataConstants.AppointmentOidKey] = appointment?.SchedulerAppointmentOid;

            TempData[TempDataConstants.AppointmentStartKey] = appointment?.StartDate;
            TempData[TempDataConstants.AppointmentEndKey] = appointment?.EndDate;
            TempData[TempDataConstants.AppointmentSubjectKey] = appointment?.Subject;
            TempData[TempDataConstants.AppointmentIsAllDayKey] = appointment?.AllDay ?? false;

            TempData[TempDataConstants.AppointmentCustomerOidsKey] = string.Join(",", appointment?.CustomerList.Select(s => s.CustomerOid) ?? new List<long>());

            TempData[TempDataConstants.AppointmentEmployeeOidsKey] = string.Join(",", appointment?.EmployeeList.Select(s => s.Employee.EmployeeOid) ?? new List<long>());

            TempData[TempDataConstants.AppointmentIsSerienterminKey] = appointment != null && selectedAppointmentOid is null && appointment.RecurrenceInfo is string;

            return RedirectToActionPermanent("PrepareServiceRecordInsert", "Main");
        }

        [Authorize]
        public string GetAppointmentType(long oid)
        {
            var appointment = Model.GetAppointmentByOid(oid);

            var showMenuItem = false;

            var isTask = appointment.IsTask;
            var isAbsenceTime = appointment.AbsenceReason != null;

            if(isTask)
            {
                //showMenuItem = 
            }

            return JsonConvert.SerializeObject(showMenuItem);
        }

        private void UpdateSelectedObjects()
        {
            var list = new List<ResourceDC>();
            Model.ResourceCategories2Resources.Values.DoForEach(l => l.DoForEach(s => list.AddIfNotIn(s)));

            Model.SelectedEmployees = Model.PossibleEmployees.Where(employee => Model.SelectedEmployeeOids.Contains(employee.EmployeeOid)).ToList();
            Model.SelectedCustomers = Model.PossibleCustomers.Where(customer => Model.SelectedCustomerOids.Contains(customer.CustomerOid)).ToList();
            Model.SelectedResources = list.Where(resource => resource.ResourceOid.HasValue && Model.SelectedResourceOids.Contains(resource.ResourceOid.Value)).ToList();

            Model.SelectedEmployeesForFiltering = Model.PossibleEmployees.Where(employee => Model.SelectedEmployeeOidsForFiltering.Contains(employee.EmployeeOid)).ToList();
            Model.SelectedCustomersForFiltering = Model.PossibleCustomers.Where(customer => Model.SelectedCustomerOidsForFiltering.Contains(customer.CustomerOid)).ToList();
            Model.SelectedResourcesForFiltering = list.Where(resource => resource.ResourceOid.HasValue && Model.SelectedResourceOidsForFiltering.Contains(resource.ResourceOid.Value)).ToList();

            Model.SelectedEmployeesForIntervalFinder = Model.PossibleEmployees.Where(employee => Model.SelectedEmployeeOidsForIntervalFinder.Contains(employee.EmployeeOid)).ToList();
            Model.SelectedCustomersForIntervalFinder = Model.PossibleCustomers.Where(customer => Model.SelectedCustomerOidsForIntervalFinder.Contains(customer.CustomerOid)).ToList();
            Model.SelectedResourcesForIntervalFinder = list.Where(resource => resource.ResourceOid.HasValue && Model.SelectedResourceOidsForIntervalFinder.Contains(resource.ResourceOid.Value)).ToList();
        }

        [Authorize]
        public ActionResult CheckEmployeeAvailability(string startString, string endString)
        {
            var start = DateTime.Parse(startString);
            var end = DateTime.Parse(endString);

            var availabilities = ReportService.GetMitarbeiterverfuegbarkeiten(AppointmentModel.PossibleEmployees, start, end);
            var employee2Overtime = new EmployeeAvailabilityObject(start, end, availabilities);

            Model.EmployeeAvailabilityObject = employee2Overtime;
            ViewData[ViewDataConstants.SchedulerEmployeeAvailabilityConstant] = employee2Overtime;

            return PartialView("SchedulerPagePartial", Model);
        }

        [Authorize]
        public ActionResult SelectAllEmployeesForFiltering(bool isChecked)
        {
            if(Model is null)
            {
                TempData[TempDataConstants.DoLogoutKey] = true;
                return PartialView("AptFltEmployeePopupListPartial");
            }

            if(isChecked)
            {
                Model.SelectedEmployeesForFiltering = Model.PossibleEmployees;
                Model.SelectedEmployeeOidsForFiltering = Model.PossibleEmployees.Select(employee => employee.EmployeeOid).ToList();
            }
            else
            {
                Model.SelectedEmployeesForFiltering?.Clear();
                Model.SelectedEmployeeOidsForFiltering?.Clear();
            }

            return PartialView("AptFltEmployeePopupListPartial", Model);
        }

        [Authorize]
        public ActionResult SelectAllCustomersForFiltering(bool isChecked)
        {
            if(Model is null)
            {
                TempData[TempDataConstants.DoLogoutKey] = true;
                return PartialView("AptFltCustomerPopupListPartial");
            }

            if(isChecked)
            {
                Model.SelectedCustomerOidsForFiltering = Model.PossibleCustomers.Select(customer => customer.CustomerOid).ToList();
                Model.SelectedCustomersForFiltering = Model.PossibleCustomers;
            }
            else
            {
                Model.SelectedCustomerOidsForFiltering?.Clear();
                Model.SelectedCustomersForFiltering?.Clear();
            }

            return PartialView("AptFltCustomerPopupListPartial", Model);
        }

        [Authorize]
        public ActionResult SelectAllResourcesForFiltering(bool isChecked)
        {
            if(Model is null)
            {
                TempData[TempDataConstants.DoLogoutKey] = true;
                return PartialView("AptFltResourcePopupListPartial");
            }

            if(isChecked)
            {
                Model.SelectedResourceOidsForFiltering = Model.PossibleResources.Where(resource => resource.ResourceOid.HasValue).Select(resource => resource.ResourceOid.Value).ToList();
                Model.SelectedResourcesForFiltering = Model.PossibleResources;
            }
            else
            {
                Model.SelectedResourceOidsForFiltering?.Clear();
                Model.SelectedResourcesForFiltering?.Clear();
            }

            return PartialView("AptFltResourcePopupListPartial", Model);
        }

        [Authorize]
        public ActionResult SelectTeamForAppointment(long teamOid)
        {
            if(Model is null)
            {
                TempData[TempDataConstants.DoLogoutKey] = true;
                return PartialView("AptFltEmployeePopupListPartial");
            }

            var selectedTeam = Model.MyTeams.FirstOrDefault(team => team.TeamOid.Equals(teamOid));

            if(selectedTeam is null)
            {
                return PartialView("AptFltEmployeePopupListPartial", Model);
            }

            var fullTeamObj = EmployeeService.LoadTeam(teamOid);

            var teamMembers = fullTeamObj?.Member ?? new List<CompactEmployeeDC>();

            Model.SelectedEmployeesForFiltering.AddRangeIfElementsNotIn(teamMembers);
            Model.SelectedEmployeeOids.AddRangeIfElementsNotIn(teamMembers.Select(member => member.EmployeeOid));

            return PartialView("AptFltEmployeePopupListPartial", Model);
        }

        [Authorize]
        public ActionResult UpdateEmployeeSelection(long[] selectedEmployeeOids)
        {
            if(Model is null)
            {
                TempData[TempDataConstants.DoLogoutKey] = true;
                return PartialView("AptFltEmployeePopupListPartial");
            }

            var selectedEmployees = Model.PossibleEmployees.Where(possibleEmployee => selectedEmployeeOids.Contains(possibleEmployee.EmployeeOid)).ToList();

            Model.SelectedEmployeesForFiltering = selectedEmployees;
            Model.SelectedEmployeeOidsForFiltering = selectedEmployees.Select(employee => employee.EmployeeOid).ToList();

            return PartialView("AptFltEmployeePopupListPartial", Model);
        }

        [Authorize]
        public ActionResult UpdateCustomerSelection(long[] selectedCustomerOids)
        {
            if(Model is null)
            {
                TempData[TempDataConstants.DoLogoutKey] = true;
                return PartialView("AptFltCustomerPopupListPartial");
            }

            var selectedCustomers = Model.PossibleCustomers.Where(possibleCustomer => selectedCustomerOids.Contains(possibleCustomer.CustomerOid)).ToList();

            Model.SelectedCustomersForFiltering = selectedCustomers;
            Model.SelectedCustomerOidsForFiltering = selectedCustomers.Select(customer => customer.CustomerOid).ToList();

            return PartialView("AptFltCustomerPopupListPartial", Model);
        }

        [Authorize]
        public ActionResult UpdateResourceSelection(long[] selectedResourceOids)
        {
            if(Model is null)
            {
                TempData[TempDataConstants.DoLogoutKey] = true;
                return PartialView("AptFltResourcePopupListPartial");
            }

            var selectedResources = Model.PossibleResources.Where(possibleResource => possibleResource.ResourceOid.HasValue && selectedResourceOids.Contains(possibleResource.ResourceOid.Value)).ToList();

            Model.SelectedResourcesForFiltering = selectedResources;
            Model.SelectedResourceOidsForFiltering = selectedResources.Where(resource => resource.ResourceOid.HasValue).Select(resource => resource.ResourceOid.Value).ToList();

            return PartialView("AptFltResourcePopupListPartial", Model);
        }

        [Authorize]
        public string GetSelectedEmployeesForAptFlt()
        {
            return JsonConvert.SerializeObject(Model.SelectedEmployeeOidsForFiltering.Count);
        }

        [Authorize]
        public string GetSelectedCustomersForAptFlt()
        {
            return JsonConvert.SerializeObject(Model.SelectedCustomerOidsForFiltering.Count);
        }

        [Authorize]
        public string GetSelectedResourcesForAptFlt()
        {
            return JsonConvert.SerializeObject(Model.SelectedResourceOidsForFiltering.Count);
        }

        private ActionResult FilterAppointments(string filters)
        {
            var filterPairs = filters?.Split(';') ?? Array.Empty<string>();

            foreach(var pair in filterPairs)
            {
                var id2Checked = pair.Split("_");
                var isChecked = id2Checked[1] == "on";
                var id = id2Checked[0];

                switch(id)
                {
                    case "only-my-own-appointments-cb2":
                        Model.ShowOnlyMyOwnAppointments = isChecked;
                        UpdateUserSettingsWithoutReload(SettingsKeys.ZeigeNurMeineTermine, isChecked.ToString());
                        break;
                    case "only-private-appointments-cb2":
                        Model.ShowOnlyPrivateAppointments = isChecked;
                    break;
                    case "employee-colors-cb2":
                        Model.ShowEmployeeColors = isChecked;
                    break;
                    case "absence-times-cb2":
                        Model.ShowAbsenceTimes = isChecked;
                    break;
                    case "tasks-cb2":
                        Model.ShowTasks = isChecked;
                    break;
                    case "only-employees-cb2":
                        Model.ShowOnlyEmployees = isChecked;
                    break;
                    case "only-customers-cb2":
                        Model.ShowOnlyCustomers = isChecked;
                    break;
                    case "only-resources-cb2":
                        Model.ShowOnlyResources = isChecked;
                    break;
                }
            }

            ReloadAppointments();

            return PartialView("SchedulerPagePartial", Model);
        }
    }
}