using System.IO;
using System.Reflection;
using System.Windows;
using System.Windows.Input;
using System.Windows.Threading;
using Azaion.Annotator.DTO;
using LibVLCSharp.Shared;
using MediatR;
using Microsoft.Extensions.DependencyInjection;

namespace Azaion.Annotator;

public partial class App : Application
{
    private readonly ServiceProvider _serviceProvider;
    private IMediator _mediator;
    
    public App()
    {
        var services = new ServiceCollection();
        services.AddSingleton<MainWindow>();
        services.AddSingleton<HelpWindow>();
        services.AddMediatR(c => c.RegisterServicesFromAssembly(Assembly.GetExecutingAssembly()));
        services.AddSingleton<LibVLC>(_ => new LibVLC());
        services.AddSingleton<FormState>();
        services.AddSingleton<MediaPlayer>(sp =>
        {
            var libVLC = sp.GetRequiredService<LibVLC>();
            return new MediaPlayer(libVLC);
        });
        services.AddSingleton<Config>(_ => Config.Read());
        services.AddSingleton<PlayerControlHandler>();
        _serviceProvider = services.BuildServiceProvider();
        _mediator = _serviceProvider.GetService<IMediator>()!;
        DispatcherUnhandledException += OnDispatcherUnhandledException;
    }
    
    private void OnDispatcherUnhandledException(object sender, DispatcherUnhandledExceptionEventArgs e)
    {
        File.AppendAllText("logs.txt", e.Exception.Message);
        e.Handled = true;
    }

    protected override void OnStartup(StartupEventArgs e)
    {
        EventManager.RegisterClassHandler(typeof(UIElement), UIElement.KeyDownEvent, new RoutedEventHandler(GlobalClick));
        _serviceProvider.GetRequiredService<MainWindow>().Show();
    }

    private void GlobalClick(object sender, RoutedEventArgs e)
    {
        var args = (KeyEventArgs)e;
        
        _mediator.Publish(new KeyEvent(sender, args));
    }
}