presence/Presence.Desktop/ViewModels/PresenceViewModel.cs

// using System.Reactive;
// using ReactiveUI;

// namespace Presence.Desktop.ViewModels;

// public class PresenceViewModel: ViewModelBase, IRoutableViewModel
// {
//     public string? UrlPathSegment { get; }
//     public IScreen HostScreen { get; }

//     public ReactiveCommand<Unit, Unit> GoBackCommand { get; }

//     public PresenceViewModel(IScreen hostScreen)
//     {
//         HostScreen = hostScreen;

//         GoBackCommand = ReactiveCommand.Create(() =>
//         {
//             HostScreen.Router.Navigate.Execute(new StartViewModel(HostScreen));
//         });
//     }
// }

using System;
using System.Reactive;
using ReactiveUI;
using Demo.Domain.Models;
using Demo.Domain.UseCase;
using System.Collections.ObjectModel;
using Presence.Desktop.Models;

namespace Presence.Desktop.ViewModels
{
    public class PresenceViewModel : ViewModelBase, IRoutableViewModel
    {
        public string? UrlPathSegment { get; }
        public IScreen HostScreen { get; }

        public ReactiveCommand<Unit, Unit> GoBackCommand { get; }
        public ReactiveCommand<Unit, Unit> FilterAttendanceCommand { get; }

        public ObservableCollection<PresencePresenter> AttendanceRecords { get; set; } = new();
        public ObservableCollection<Group> Groups { get; set; } = new();
        public ObservableCollection<string> AttendanceTypes { get; set; } = new()
        {
            "Присутствовал",
            "Отсутствовал",
        };

        private Group? _selectedGroup;
        public Group? SelectedGroup
        {
            get => _selectedGroup;
            set
            {
                this.RaiseAndSetIfChanged(ref _selectedGroup, value);
                FilterAttendanceRecords();
            }
        }

        private DateTime? _selectedDate;
        public DateTime? SelectedDate
        {
            get => _selectedDate;
            set
            {
                this.RaiseAndSetIfChanged(ref _selectedDate, value);
                FilterAttendanceRecords();
            }
        }

        private readonly IGroupUseCase _groupUseCase;
        private readonly IPresenceUseCase _presenceUseCase;

        public PresenceViewModel(IScreen hostScreen, IGroupUseCase groupUseCase, IPresenceUseCase presenceUseCase)
        {
            HostScreen = hostScreen;
            _groupUseCase = groupUseCase;
            _presenceUseCase = presenceUseCase;

            GoBackCommand = ReactiveCommand.Create(() =>
            {
                HostScreen.Router.Navigate.Execute(new StartViewModel(HostScreen));
            });

            FilterAttendanceCommand = ReactiveCommand.Create(FilterAttendanceRecords);

            LoadGroups();
        }

        private void LoadGroups()
        {
            Groups.Clear();
            var groups = _groupUseCase.GetAllGroups();
            foreach (var group in groups)
            {
                Groups.Add(group);
            }
        }

        private void FilterAttendanceRecords()
        {
            if (SelectedGroup == null || SelectedDate == null)
            {
                AttendanceRecords.Clear();
                return;
            }

            var dateOnly = DateOnly.FromDateTime(SelectedDate.Value);

            var records = _presenceUseCase.GetPresenceByGroupByTime(
                SelectedGroup.ID,
                dateOnly);

            AttendanceRecords.Clear();
            foreach (var record in records)
            {
                // Преобразуем значение IsAttedance в строку прямо здесь
                var attendanceStatus = record.IsAttedance ? "Был на уроке" : "Не был на уроке";

                AttendanceRecords.Add(new PresencePresenter
                {
                    UserGuid = record.User.Guid,
                    IsAttedance = record.IsAttedance,  // оставляем bool в модели
                    Date = record.Date,
                    LessonNumber = record.LessonNumber,
                    user = new UserPresenter
                    {
                        Name = record.User.FIO,
                        Guid = record.User.Guid
                    },
                    AttendanceStatus = attendanceStatus  // добавляем строковое представление
                });
            }
        }

        // Новый метод для обработки изменения типа посещаемости
        public void OnAttendanceTypeChanged(PresencePresenter presence, string newType)
        {
            presence.IsAttedance = newType == "Присутствовал";

            if (_presenceUseCase.UpdateAttendance(presence.LessonNumber, presence.Date, presence.UserGuid, presence.IsAttedance))
            {
                Console.WriteLine($"Изменен тип посещаемости для {presence.user.Name}: {newType}");
            }
            else
            {
                Console.WriteLine($"Не удалось обновить тип посещаемости для {presence.user.Name}");
            }
        }
    }
}