using GZStudio.Contracts.Services;
using GZStudio.Helpers;
using GZStudio.ViewModels;

using Microsoft.UI.Xaml;
using Microsoft.UI.Xaml.Controls;
using Microsoft.UI.Xaml.Input;
using Microsoft.UI.Xaml.Media;

using Windows.System;

namespace GZStudio.Views;

// TODO: Update NavigationViewItem titles and icons in ShellPage.xaml.


public sealed partial class ShellPage : Page
{
    public ShellViewModel ViewModel
    {
        get;
    }

    public ShellPage(ShellViewModel viewModel)
    {
        ViewModel = viewModel;
        InitializeComponent();

        ViewModel.NavigationService.Frame = NavigationFrame;
        ViewModel.NavigationViewService.Initialize(NavigationViewControl);

        // TODO: Set the title bar icon by updating /Assets/WindowIcon.ico.
        // A custom title bar is required for full window theme and Mica support.
        // https://docs.microsoft.com/windows/apps/develop/title-bar?tabs=winui3#full-customization
        App.MainWindow.ExtendsContentIntoTitleBar = true;
        App.MainWindow.SetTitleBar(AppTitleBar);
        App.MainWindow.Activated += MainWindow_Activated;
        //AppTitleBarText.Text = "AppDisplayName".GetLocalized();
        //AppTitleBar.Loaded += MyTitleBar_Loaded;
    }

    //private void MyTitleBar_Loaded(object sender, RoutedEventArgs e)
    //{
    //    // Parts get delay loaded. If you have the parts, make them visible.
    //    VisualStateManager.GoToState(AppTitleBar, "SubtitleTextVisible", false);
    //    VisualStateManager.GoToState(AppTitleBar, "HeaderVisible", false);
    //    VisualStateManager.GoToState(AppTitleBar, "ContentVisible", false);
    //    VisualStateManager.GoToState(AppTitleBar, "FooterVisible", false);

    //    // Run layout so we re-calculate the drag regions.
    //    AppTitleBar.InvalidateMeasure();
    //}

    private void OnLoaded(object sender, Microsoft.UI.Xaml.RoutedEventArgs e)
    {
        TitleBarHelper.UpdateTitleBar(RequestedTheme);

        KeyboardAccelerators.Add(BuildKeyboardAccelerator(VirtualKey.Left, VirtualKeyModifiers.Menu));
        KeyboardAccelerators.Add(BuildKeyboardAccelerator(VirtualKey.GoBack));
    }

    private void MainWindow_Activated(object sender, WindowActivatedEventArgs args)
    {
        //App.AppTitlebar = AppTitleBarText as UIElement;
    }

    private void NavigationViewControl_DisplayModeChanged(NavigationView sender, NavigationViewDisplayModeChangedEventArgs args)
    {
        //AppTitleBar.Margin = new Thickness()
        //{
        //    Left = sender.CompactPaneLength * (sender.DisplayMode == NavigationViewDisplayMode.Minimal ? 2 : 1),
        //    Top = AppTitleBar.Margin.Top,
        //    Right = AppTitleBar.Margin.Right,
        //    Bottom = AppTitleBar.Margin.Bottom
        //};
    }

    private static KeyboardAccelerator BuildKeyboardAccelerator(VirtualKey key, VirtualKeyModifiers? modifiers = null)
    {
        var keyboardAccelerator = new KeyboardAccelerator() { Key = key };

        if (modifiers.HasValue)
        {
            keyboardAccelerator.Modifiers = modifiers.Value;
        }

        keyboardAccelerator.Invoked += OnKeyboardAcceleratorInvoked;

        return keyboardAccelerator;
    }

    private static void OnKeyboardAcceleratorInvoked(KeyboardAccelerator sender, KeyboardAcceleratorInvokedEventArgs args)
    {
        var navigationService = App.GetService<INavigationService>();

        var result = navigationService.GoBack();

        args.Handled = result;
    }
}