using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Navigation;
using GalaSoft.MvvmLight.Messaging;
using MahTweets.Core;
using MahTweets.Core.Events;
using MahTweets.Extensions.Twitter.ViewModels;

namespace MahTweets.Extensions.Twitter.Views
{
    public partial class ProfileView
    {
        private AbstractStatus _oldSelection;

        public ProfileView()
        {
            InitializeComponent();
        }

        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
            base.OnNavigatedTo(e);

            var UpdatesCollectionView = Resources["UpdatesCollectionView"] as CollectionViewSource;
            UpdatesCollectionView.Source = ((ProfileViewModel) ViewModel).Updates;

            Messenger.Default.Register<CloseCompostionEvent>(this, CompostionViewClosedHandler);
            Messenger.Default.Register<OpenCompositionEvent>(this, OpenCompositionEventHandler);
        }

        protected override void OnNavigatedFrom(NavigationEventArgs e)
        {
            Messenger.Default.Unregister<OpenCompositionEvent>(this, OpenCompositionEventHandler);
            base.OnNavigatedFrom(e);
        }

        protected override void OnBackKeyPress(System.ComponentModel.CancelEventArgs e)
        {
            if (composition.Visibility == Visibility.Visible)
            {
                e.Cancel = true;
                CompostionViewClosedHandler(null);
            }
            base.OnBackKeyPress(e);
        }

        private void OpenCompositionEventHandler(OpenCompositionEvent obj)
        {
            Dispatcher.BeginInvoke(() =>
            {
                ApplicationBar.IsVisible = false;
                composition.SetComposition(obj);
                pvProfile.Visibility = Visibility.Collapsed;
                composition.Visibility = Visibility.Visible;
            });
        }

        private void CompostionViewClosedHandler(CloseCompostionEvent obj)
        {
            Dispatcher.BeginInvoke(() =>
            {
                ApplicationBar.IsVisible = true;
                pvProfile.Visibility = Visibility.Visible;
                composition.Visibility = Visibility.Collapsed;
            });
        }


        private void LbEverythingSelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (!(lbEverything.SelectedItem is AbstractStatus))
                return;

            var update = (AbstractStatus) lbEverything.SelectedItem;
            update.IsSelected = update.IsSelected != true;

            if (update != _oldSelection && _oldSelection != null)
            {
                _oldSelection.IsSelected = false;
            }

            _oldSelection = update;
        }

    }
}