infineon_cs_hmi/uniper_hmi_old/UniperHMI/MainWindowVM.cs

using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using CommunityToolkit.Mvvm.Messaging;
using Heisig.HMI.AdsManager;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using System.Windows;
using System.Windows.Controls;
using TcEventLoggerAdsProxyLib;
using InfineonHMI.Pages.Views;

namespace InfineonHMI;

public sealed partial class MainWindowVM : ObservableObject, IRecipient<NavigateMessage>, IDisposable
{

	[ObservableProperty] private StringControlButtonVM dummyStringVM;

	[ObservableProperty] private Page currentPage;
	
	[ObservableProperty] private Visibility statusBarVisible;

	[ObservableProperty] private string breadcrumb;

	[ObservableProperty] private string actualUser;

	private const string _actualUserPrefix = "Aktueller Benutzer: \n";

	private readonly IAdsManager _adsManager;
	private readonly IConfiguration _config;
	private readonly TcEventLogger _eventlogger;

	// Last active event
	[ObservableProperty] private string currentActiveEvent = "";

	private readonly object _lock = new();

	// Empty page
	private readonly Page _emptyPage;

	// Last navigate message
	private readonly Stack<NavigateMessage> _messageStack = new();
	NavigateMessage? _currentMessage;

	// Events page view model
	[ObservableProperty] EventsPageVM _eventsPageVM;

	// Settings page viem model
	SettingsPageVM? _settingsPageVM;

    ProductionOverviewPageVM? _productionOverviewPageVM;

    private MachineOverviewPageVM? _machineOverviewPageVM;

	// Hot Coolplate page view model
	HotCoolPlatePageVM? _hotCoolplatePageVM;


	// Kuka Robot page view model
	ReceipePageVM? _receipePageVM;

	public MainWindowVM(IAdsManager adsManager, IConfiguration config, TcEventLogger eventLogger)
	{
		_adsManager = adsManager;
		_config = config;

		ActualUser = _actualUserPrefix + "---------";
		// Create dummy string
		DummyStringVM = new StringControlButtonVM();

		// Create empty page
		_emptyPage = new();

		// Create events page viewmodel
		_eventlogger = eventLogger;
		_eventsPageVM = new(_eventlogger);

		CurrentPage = _emptyPage;
		_currentMessage = new NavigateMessage("", typeof(Page));
		_messageStack.Push(_currentMessage);

		WeakReferenceMessenger.Default.Register<NavigateMessage>(this);

		breadcrumb = "";
	}

	public void NavigateFromOuterPage(NavigateMessage message, NavigateMessage nextMessage)
	{
		_currentMessage = message;

		Navigate(message, nextMessage);
	}


	[RelayCommand]
	private void SettingsWindow()
	{
		StatusBarVisible = Visibility.Visible;
		_messageStack.Clear();
		NavigateMessage message = new("", typeof(SettingsPage));
		Receive(message);
	}

	[RelayCommand]
	private void ChangeUserClicked()
	{

	}

	[RelayCommand]
	private void WorkingModeSelectionClicked()
	{

	}

	[RelayCommand]
	private void OverviewWindowClicked()
	{
		_messageStack.Clear();
		_currentMessage = new NavigateMessage("", typeof(Page));
		NavigateMessage message = new(_config[""]!, typeof(MachineOverviewPage));
		Receive(message);
	}

	[RelayCommand]
	private void ProductionWindowClicked()
	{
		StatusBarVisible = Visibility.Visible;
		_messageStack.Clear();
		_currentMessage = new NavigateMessage("", typeof(Page));
		NavigateMessage message = new(_config[""]!, typeof(ProductionOverviewPage));
		Receive(message);
	}

	[RelayCommand]
	private void ProtocolWindowClicked()
	{
	}

	[RelayCommand]
	private void ReceipesWindowClicked()
	{
		StatusBarVisible = Visibility.Visible;
		_messageStack.Clear();
		_currentMessage = new NavigateMessage("", typeof(Page));
		NavigateMessage message = new(_config[""]!, typeof(ReceipePage));
		Receive(message);
	}

	[RelayCommand]
	private void TrendWindowClicked()
	{
	}

	[RelayCommand]
	private void ComponentsWindowClicked()
	{
	}

	[RelayCommand]
	private void SettingsWindowClicked()
	{
		_messageStack.Clear();
		NavigateMessage message = new("", typeof(SettingsPage));
		Receive(message);
	}


	[RelayCommand]
    public void EventsListClicked()
    {
        StatusBarVisible = Visibility.Collapsed;
        _messageStack.Clear();
        _currentMessage = new NavigateMessage("", typeof(Page));
        NavigateMessage message = new("", typeof(EventsPage));
        Receive(message);
    }
    
	

    // Only use for forward traversal!
    public void Receive(NavigateMessage message)
    {
        // Only change page if its a new page type
        if (CurrentPage.GetType() == message.type)
            return;

        // Push current message
        if (_currentMessage != null)
            _messageStack.Push(_currentMessage);

        // Save current message for later push
        _currentMessage = message;


        Navigate(message);
    }

    private void Navigate(NavigateMessage message, NavigateMessage? nextMessage = null)
    {
        // Dispose current pages viewmodel
        if (CurrentPage.DataContext is IDisposable viewModel)
        {
            CurrentPage.DataContext = null;
            viewModel.Dispose();
        }

        // Create new page
        switch (message.type.Name)
        {
            case nameof(ProductionOverviewPage):

	            if (_productionOverviewPageVM == null || nextMessage != null)
		            _productionOverviewPageVM = new ProductionOverviewPageVM(_adsManager, _config,  _eventlogger, nextMessage);
	            ProductionOverviewPage productionOverviewPage = new() { DataContext = _productionOverviewPageVM };
                CurrentPage = productionOverviewPage;
	            break;

			case nameof(MachineOverviewPage):
				_machineOverviewPageVM?.Dispose();

				_machineOverviewPageVM = new MachineOverviewPageVM(_adsManager, _config,this, new ProductionOverviewPageVM(_adsManager, _config, _eventlogger), _eventlogger);
				MachineOverviewPage machineOverviewPage = new() { DataContext = _machineOverviewPageVM };
				CurrentPage = machineOverviewPage;
				break;

            case nameof(EventsPage):
#pragma warning disable MVVMTK0034 // Direct field reference to [ObservableProperty] backing field
                EventsPage eventsPage = new() { DataContext = _eventsPageVM };
#pragma warning restore MVVMTK0034 // Direct field reference to [ObservableProperty] backing field
                CurrentPage = eventsPage;
                Breadcrumb = " > Events";
                break;

            case nameof(SettingsPage):
                // Create seetings page view model only once
                if (_settingsPageVM == null)
                    _settingsPageVM = new(_adsManager, "GVL_CONFIG.stUnitConfig");
                    
                SettingsPage settingsPage = new() { DataContext = _settingsPageVM };
                CurrentPage = settingsPage;
                Breadcrumb = " > Settings";
                break;

            case nameof(ReceipePage):
	            if (_receipePageVM == null)
		            _receipePageVM = new();

	            ReceipePage receipePage = new() { DataContext = _receipePageVM };
	            CurrentPage = receipePage;
	            Breadcrumb = " > Kuka Roboter";
	            break;

			

            case nameof(HotCoolPlatePage):
                if (_hotCoolplatePageVM == null)
                    _hotCoolplatePageVM = new(_adsManager, "GVL_Config.stHotCoolplateConfig");

                HotCoolPlatePage hotCoolPlatePage = new() {DataContext = _hotCoolplatePageVM };
                CurrentPage = hotCoolPlatePage;
                Breadcrumb = " > Heiz- /Kühlplatte";
                break;


            
            default:
                CurrentPage = new Page();
                break;
        }
    }

    private void AppendBreadcrumb(string path)
    {
        if (Breadcrumb[^1] != ' ')
            Breadcrumb += " > " + path;
        else
            Breadcrumb += "> " + path;
    }

    [RelayCommand]
    private void AckAlarms()
    {
        _adsManager.WriteValue("GVL_SCADA.stConfirmAlarmsBtn.xRequest", true);
    }

    public void Dispose()
    {
        // Dispose current pages viewmodel
        if (CurrentPage.DataContext is IDisposable viewModel)
        {
            CurrentPage.DataContext = null;
            viewModel.Dispose();
        }

        DummyStringVM.Dispose();
    }
}