using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Navigation;
using GalaSoft.MvvmLight.Messaging;
using MahTweets.Mobile.Core;
using MahTweets.Mobile.Core.Interfaces;
using Microsoft.Phone.Controls;
using Microsoft.Phone.Shell;

namespace MahTweets.Mobile
{
    public partial class App
    {
        private static List<UpdateType> _updateTypes;

        // Avoid double-initialization
        private bool _phoneApplicationInitialized;

        public PhoneApplicationFrame RootFrame { get; private set; }

        public App()
        {

            UnhandledException += ApplicationUnhandledException;

            if (Debugger.IsAttached)
            {
                Current.Host.Settings.EnableFrameRateCounter = true;
            }

            InitializeComponent();

            InitializePhoneApplication();

            Startup += AppStartup;

            // MahTweets specific stuff
            GlobalDispatcher.Dispatcher = Deployment.Current.Dispatcher;
        }


        // Code to execute when the application is launching (eg, from Start)
        // This code will not execute when the application is reactivated
        private void ApplicationLaunching(object sender, LaunchingEventArgs e)
        {
            ViewModelLocator.Current.Initialise();
            ViewModelLocator.Current.MainViewModel.LoadTimeline();
            ViewModelLocator.Current.MainViewModel.HandleNotifications();
        }

        // Code to execute when the application is activated (brought to foreground)
        // This code will not execute when the application is first launched
        private void ApplicationActivated(object sender, ActivatedEventArgs e)
        {
            ViewModelLocator.Current.Initialise();
            ViewModelLocator.Current.MainViewModel.LoadTimeline();
            ViewModelLocator.Current.MainViewModel.HandleNotifications();
        }

        // Code to execute when the application is deactivated (sent to background)
        // This code will not execute when the application is closing
        private void ApplicationDeactivated(object sender, DeactivatedEventArgs e)
        {
            ViewModelLocator.Current.MainViewModel.SaveTimeline();
        }

        // Code to execute when the application is closing (eg, user hit Back)
        // This code will not execute when the application is deactivated
        private void ApplicationClosing(object sender, ClosingEventArgs e)
        {
            ViewModelLocator.Current.MainViewModel.SaveTimeline();
        }

        // Do not add any additional code to this method
        private void InitializePhoneApplication()
        {
            if (_phoneApplicationInitialized)
                return;

            RootFrame = new TransitionFrame();
            RootFrame.Navigated += CompleteInitializePhoneApplication;
            RootFrame.NavigationFailed += RootFrameNavigationFailed;
            RootFrame.Obscured += RootFrameObscured;
            RootFrame.Unobscured += RootFrameUnobscured;

            // Ensure we don't initialize again
            _phoneApplicationInitialized = true;
        }

        private void RootFrameUnobscured(object sender, EventArgs e)
        {
            ViewModelLocator.Current.MainViewModel.RestartTimer();
            Messenger.Default.Send(new ResumeTimerEvent());
        }

        private void RootFrameObscured(object sender, ObscuredEventArgs e)
        {
            ViewModelLocator.Current.MainViewModel.StopTimer();
            Messenger.Default.Send(new PauseTimerEvent());
        }

        private void CompleteInitializePhoneApplication(object sender, NavigationEventArgs e)
        {
            if (RootVisual != RootFrame)
                RootVisual = RootFrame;

            RootFrame.Navigated -= CompleteInitializePhoneApplication;

        }

        private static void RootFrameNavigationFailed(object sender, NavigationFailedEventArgs e)
        {
            if (Debugger.IsAttached)
            {
                Debugger.Break();
            }
            ViewModelLocator.Current.Feedback.SendException(e.Exception);
        }

        // Code to execute on Unhandled Exceptions
        private static void ApplicationUnhandledException(object sender, ApplicationUnhandledExceptionEventArgs e)
        {
            if (Debugger.IsAttached)
            {
                // An unhandled exception has occurred; break into the debugger
                Debugger.Break();
            }
            ViewModelLocator.Current.Feedback.SendException(e.ExceptionObject);
        }

        static void AppStartup(object sender, StartupEventArgs e)
        {

        }


        public static IEnumerable<UpdateType> UpdateTypes
        {
            get
            {
                return _updateTypes ?? (_updateTypes = new List<UpdateType>
                                                           {
                                                               new NormalUpdate(),
                                                               new MentionUpdate(),
                                                               new DirectMessageUpdate()
                                                           });
            }
        }

        //HACK: THIS SHOULD NOT BE HERE BUT ARGH STUPID PERFORMANCE OVERHEADS
        private void ImageMouseLeftButtonUp(object sender, MouseButtonEventArgs e)
        {
            ViewModelLocator.Current.NavigationService.Navigate(
                new Uri(
                    "/MahTweets.Mobile.TwitterPlugin;component/Views/ProfileView.xaml?Name=" +
                    ((IStatusUpdate)((Image)sender).DataContext).Contact.Name, UriKind.RelativeOrAbsolute));
        }
    }
}