MARKUS

using NetSparkleUpdater.Enums;

using NetSparkleUpdater.Events;

using NetSparkleUpdater.Interfaces;

using NetSparkleUpdater.UI.WPF.Controls;

using NetSparkleUpdater.UI.WPF.Interfaces;

using NetSparkleUpdater.UI.WPF.ViewModels;

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading;

using System.Threading.Tasks;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Imaging;

using System.Windows.Navigation;

using System.Windows.Shapes;

namespace NetSparkleUpdater.UI.WPF

{

    /// <summary>

    /// Interaction logic for UpdateAvailableWindow.xaml

    /// </summary>

    public partial class UpdateAvailableWindow : BaseWindow, IUpdateAvailable, IReleaseNotesUpdater, IUserRespondedToUpdateCheck

    {

        private UpdateAvailableWindowViewModel _dataContext;

        private bool _hasFinishedNavigatingToAboutBlank = false;

        private string _notes = "";

        public UpdateAvailableWindow() : base(true)

        {

            InitializeComponent();

        }

        public UpdateAvailableWindow(UpdateAvailableWindowViewModel viewModel) : base(true)

        {

            InitializeComponent();

            DataContext = _dataContext = viewModel;

            _dataContext.ReleaseNotesUpdater = this;

            _dataContext.UserRespondedHandler = this;

            ReleaseNotesBrowser.Navigated += ReleaseNotesBrowser_Navigated;

        }

        UpdateAvailableResult IUpdateAvailable.Result => _dataContext?.UserResponse ?? UpdateAvailableResult.None;

        AppCastItem IUpdateAvailable.CurrentItem => CurrentItem;

        public AppCastItem CurrentItem

        {

            get { return _dataContext?.Updates?.FirstOrDefault(); }

        }

        public event UserRespondedToUpdate UserResponded;

        void IUpdateAvailable.BringToFront()

        {

            BringToFront();

        }

        void IUpdateAvailable.Close()

        {

            ReleaseNotesBrowser.Navigated -= ReleaseNotesBrowser_Navigated;

            CloseWindow();

        }

        void IUpdateAvailable.HideReleaseNotes()

        {

            if (_dataContext != null)

            {

                _dataContext.AreReleaseNotesVisible = false;

            }

            ReleaseNotesRow.Height = new GridLength(10);

        }

        void IUpdateAvailable.HideRemindMeLaterButton()

        {

            if (_dataContext != null)

            {

                _dataContext.IsRemindMeLaterVisible = false;

            }

        }

        void IUpdateAvailable.HideSkipButton()

        {

            if (_dataContext != null)

            {

                _dataContext.IsSkipVisible = false;

            }

        }

        void IUpdateAvailable.Show(bool isOnMainThread)

        {

            ShowWindow(isOnMainThread);

        }

        public void UserRespondedToUpdateCheck(UpdateAvailableResult response)

        {

            UserResponded?.Invoke(this, new UpdateResponseEventArgs(_dataContext?.UserResponse ?? UpdateAvailableResult.None, CurrentItem));

        }

        // there is some bizarre thing where the WPF browser doesn't navigate to the release notes unless you successfully navigate to

        // about:blank first. I don't know why. I feel like this is a Terrible Bad Fix, but...it works for now...

        public void ShowReleaseNotes(string notes)

        {

            _notes = notes;

            ReleaseNotesBrowser.Dispatcher.Invoke(() =>

            {

                if (ReleaseNotesBrowser.IsLoaded)

                {

                    if (_hasFinishedNavigatingToAboutBlank)

                    {

                        ReleaseNotesBrowser.NavigateToString(_notes);

                    }

                    // else will catch up when navigating to about:blank is done

                }

                else

                {

                    // don't do anything until the web browser is loaded

                    ReleaseNotesBrowser.Loaded += ReleaseNotesBrowser_Loaded;

                }

            });

        }

        private void ReleaseNotesBrowser_Loaded(object sender, RoutedEventArgs e)

        {

            // see https://stackoverflow.com/a/15209861/3938401

            ReleaseNotesBrowser.Loaded -= ReleaseNotesBrowser_Loaded;

            ReleaseNotesBrowser.Dispatcher.Invoke(() =>

            {

                ReleaseNotesBrowser.NavigateToString("about:blank");

            });

        }

        private void ReleaseNotesBrowser_Navigated(object sender, NavigationEventArgs e)

        {

            if (!_hasFinishedNavigatingToAboutBlank)

            {

                ReleaseNotesBrowser.NavigateToString(_notes);

                _hasFinishedNavigatingToAboutBlank = true;

            }

        }

    }

}