using System.Reflection;
using System.Windows;
using System.Windows.Input;
using System.Windows.Threading;
using Azaion.Annotator;
using Azaion.Annotator.DTO;
using Azaion.Annotator.Extensions;
using Azaion.Common.DTO;
using Azaion.Common.DTO.Config;
using Azaion.Common.Extensions;
using Azaion.Suite.Services;
using Azaion.Suite.Services.DTO;
using Azaion.Dataset;
using LibVLCSharp.Shared;
using MediatR;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using Serilog;

namespace Azaion.Suite;

public partial class App : Application
{
    private readonly IHost _host;
    private readonly ILogger<App> _logger;
    private readonly IMediator _mediator;

    public App()
    {
        Log.Logger = new LoggerConfiguration()
            .Enrich.FromLogContext()
            .MinimumLevel.Information()
            .WriteTo.Console()
            .WriteTo.File(
                path: "Logs/log.txt",
                rollingInterval: RollingInterval.Day)
            .CreateLogger();

        _host = Host.CreateDefaultBuilder()
            .ConfigureAppConfiguration((context, config) => config
                .AddCommandLine(Environment.GetCommandLineArgs())
                .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true))
            .ConfigureServices((context, services) =>
            {
                services.AddSingleton<Loader>();
                services.AddSingleton<IHardwareService, HardwareService>();
                services.AddSingleton<IResourceLoader, ResourceLoader>();

                services.Configure<ApiConfig>(context.Configuration.GetSection(nameof(ApiConfig)));
                services.AddSingleton<IConfigUpdater, ConfigUpdater>();

                services.AddSingleton<Annotator.Annotator>();
                services.AddSingleton<DatasetExplorer>();
                services.AddSingleton<HelpWindow>();
                services.AddSingleton<IAIDetector, YOLODetector>();
                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<AnnotatorEventHandler>();
                services.AddSingleton<VLCFrameExtractor>();

                services.AddHttpClient<AzaionApiClient>((sp, client) =>
                {
                    var apiConfig = sp.GetRequiredService<IOptions<ApiConfig>>().Value;
                    client.BaseAddress = new Uri(apiConfig.Url);
                    client.Timeout = TimeSpan.FromSeconds(apiConfig.TimeoutSeconds);
                });

                services.AddSingleton<DatasetExplorer>();
                services.AddSingleton<IGalleryManager, GalleryManager>();
            })
            .Build();
        _mediator = _host.Services.GetRequiredService<IMediator>();
        _logger = _host.Services.GetRequiredService<ILogger<App>>();
        DispatcherUnhandledException += OnDispatcherUnhandledException;
    }

    private void OnDispatcherUnhandledException(object sender, DispatcherUnhandledExceptionEventArgs e)
    {
        _logger.LogError(e.Exception, e.Exception.Message);
        e.Handled = true;
    }

    protected override async void OnStartup(StartupEventArgs e)
    {
        EventManager.RegisterClassHandler(typeof(UIElement), UIElement.KeyDownEvent, new RoutedEventHandler(GlobalClick));
        await _host.StartAsync();
        _host.Services.GetRequiredService<Loader>().Show();

        base.OnStartup(e);
    }

    private void GlobalClick(object sender, RoutedEventArgs e)
    {
        var args = (KeyEventArgs)e;
        var keyEvent = new  KeyEvent(sender, args, (sender as FrameworkElement).GetParentWindow());
        _ = ThrottleExt.Throttle(() => _mediator.Publish(keyEvent), TimeSpan.FromMilliseconds(50));
    }

    protected override async void OnExit(ExitEventArgs e)
    {
        await _host.StopAsync();
        _host.Dispose();
        base.OnExit(e);
    }
}