DaSaSo/DaSaSo.ViewModel/Window/MainWindowViewModel.cs

using DaSaSo.Domain.Model;
using DaSaSo.EntityFramework;
using DaSaSo.EntityFramework.Services;
using Microsoft.Toolkit.Mvvm.Input;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Input;

namespace DaSaSo.ViewModel
{
    public sealed class MainWindowViewModel : BaseViewModel
    {
        private BaseViewModel _actualViewModel;
        private Client _selectedClient;
        private Project _selectedProject;
        private Buildingsite _selectedBuildingsite;
        
        public IRelayCommand ListClientsCommand { get; set; }
        public IRelayCommand ListProjectCommand { get; set; }
        public IRelayCommand ListBuildingsiteCommand { get; set; }
        public IRelayCommand ListSewerObjectsCommand { get; set; }

        public BaseViewModel ActualViewModel
        {
            get => _actualViewModel;
            set
            {
                if(_actualViewModel != value)
                {
                    _actualViewModel = value;
                    OnPropertyChanged();
                }
            }
        }
        public Project SelectedProject
        {
            get => _selectedProject;
            set
            {
                if(value == null)
                {
                    ListBuildingsiteCommand.NotifyCanExecuteChanged();
                }
                if(_selectedProject != value && value != null)
                {
                    _selectedProject = value;
                    OnPropertyChanged();
                    ListBuildingsiteCommand.NotifyCanExecuteChanged();
                }
            }
        }
        public Buildingsite SelectedBuildingsite
        {
            get => _selectedBuildingsite;
            set
            {
                if(value == null)
                {
                    ListSewerObjectsCommand.NotifyCanExecuteChanged();
                }
                if(_selectedBuildingsite != value && value != null)
                {
                    _selectedBuildingsite = value;
                    OnPropertyChanged();
                    ListSewerObjectsCommand.NotifyCanExecuteChanged();
                }
            }
        }

        public Client SelectedClient
        {
            get => _selectedClient;
            set
            {
                if(_selectedClient != value)
                {
                    _selectedClient = value;
                    SelectedProject = null;
                    OnPropertyChanged();
                    ListProjectCommand.NotifyCanExecuteChanged();
                }
            }
        }
        public MainWindowViewModel()
        {
            ListClientsCommand = new RelayCommand(showClients);
            ListProjectCommand = new RelayCommand(listProjecte, () => SelectedClient != null);
            ListBuildingsiteCommand = new RelayCommand(listBuildingsite, () => SelectedProject != null);
            ListSewerObjectsCommand = new RelayCommand(listSewerObjects, () => SelectedBuildingsite != null);

            Mediator.Subscribe(Enums.EMediator.SELECTEDCLIENT, (tt) =>
            {
                SelectedClient = (Client)tt;
                listProjecte();
            });

            Mediator.Subscribe(Enums.EMediator.EDITCLIENT, (tt) =>
             {
                 ActualViewModel = new ClientEditViewModel(new GenericDataService<Client>(new DaSaSoDbContextFactory()),
                                                                                          (Client)tt);
             });
            Mediator.Subscribe(Enums.EMediator.SHOWCLIENT, (tt) => {
                ActualViewModel = null;
             });
        }

        private void showClients()
        {
            ClientListViewModel clientListViewModel = new ClientListViewModel(new GenericDataService<Client>(new DaSaSoDbContextFactory()));
            ActualViewModel = clientListViewModel;
            clientListViewModel.LoadClient();
        }

        private void listSewerObjects()
        {
            throw new NotImplementedException();
        }

        private void listBuildingsite()
        {
            throw new NotImplementedException();
        }

        private void listProjecte()
        {
            Debugger.Break();
            ActualViewModel = new ProjectListViewModel(new GenericDataService<Project>(new DaSaSoDbContextFactory()),SelectedClient);
        }
    }
}