using System.IO;
using System.Net.Http;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Threading;
using Azaion.Annotator;
using Azaion.Annotator.DTO;
using Azaion.Annotator.Extensions;
using Azaion.Common;
using Azaion.Common.DTO;
using Azaion.Common.DTO.Config;
using Azaion.Common.Extensions;
using Azaion.Common.Services;
using Azaion.Dataset;
using CommandLine;
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 Newtonsoft.Json;
using Serilog;

namespace Azaion.Suite;

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

    //Authorize to api and
    private static readonly IResourceLoader ResourceLoader;

    static App()
    {
        new ConfigUpdater().CheckConfig();

        var result = Parser.Default.ParseArguments<ApiCredentials>(Environment.GetCommandLineArgs());

        var apiCreds = !result.Errors.Any()
            ? result.Value
            : new ApiCredentials();

        ResourceLoader = new ResourceLoader(CreateApiClient(apiCreds), apiCreds);
        //AppDomain.CurrentDomain.AssemblyResolve += (_, args) => ResourceLoader.LoadAssembly(args.Name);
    }

    private static AzaionApiClient CreateApiClient(ApiCredentials credentials)
    {
        ApiConfig apiConfig;
        try
        {
            if (!File.Exists(Constants.CONFIG_PATH))
                throw new FileNotFoundException(Constants.CONFIG_PATH);
            var configStr = File.ReadAllText(Constants.CONFIG_PATH);
            apiConfig = JsonConvert.DeserializeObject<AppConfig>(configStr)!.ApiConfig;
        }
        catch (Exception e)
        {
            Console.WriteLine(e);
            apiConfig = new ApiConfig
            {
                Url = "https://api.azaion.com",
                RetryCount = 3,
                TimeoutSeconds = 40
            };
        }
        var api = new AzaionApiClient(new HttpClient
        {
            BaseAddress = new Uri(apiConfig.Url),
            Timeout = TimeSpan.FromSeconds(apiConfig.TimeoutSeconds)
        });

        api.EnterCredentials(credentials);
        return api;
    }

    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(Constants.CONFIG_PATH, optional: true, reloadOnChange: true))
            .ConfigureServices((context, services) =>
            {
                services.AddSingleton<MainSuite>();
                services.AddSingleton<IHardwareService, HardwareService>();
                services.AddSingleton(ResourceLoader);

                services.Configure<AppConfig>(context.Configuration);
                services.ConfigureSection<ApiConfig>(context.Configuration);
                services.ConfigureSection<DirectoriesConfig>(context.Configuration);
                services.ConfigureSection<AnnotationConfig>(context.Configuration);
                services.ConfigureSection<WindowConfig>(context.Configuration);
                services.ConfigureSection<AIRecognitionConfig>(context.Configuration);
                services.ConfigureSection<ThumbnailConfig>(context.Configuration);

                services.AddSingleton<IConfigUpdater, ConfigUpdater>();

                services.AddSingleton<Annotator.Annotator>();
                services.AddSingleton<DatasetExplorer>();
                services.AddSingleton<HelpWindow>();
                services.AddSingleton<IAIDetector, YOLODetector>();
                services.AddMediatR(c => c.RegisterServicesFromAssemblies(
                    typeof(Annotator.Annotator).Assembly,
                    typeof(DatasetExplorer).Assembly));
                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>();

                services.AddSingleton<IAzaionModule, AnnotatorModule>();
                services.AddSingleton<IAzaionModule, DatasetExplorerModule>();
            })
            .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<MainSuite>().Show();

        base.OnStartup(e);
    }

    private void GlobalClick(object sender, RoutedEventArgs e)
    {
        var args = (KeyEventArgs)e;
        var windowEnum = GetParentWindow(sender as FrameworkElement);
        if (windowEnum == WindowEnum.None)
            return;
        var keyEvent = new  KeyEvent(sender, args, windowEnum);
        _ = ThrottleExt.Throttle(() => _mediator.Publish(keyEvent), TimeSpan.FromMilliseconds(50));
    }

    private WindowEnum GetParentWindow(FrameworkElement? element)
    {
        if (element?.GetType().Name == "LibVLCSharp.WPF.ForegroundWindow")
            return WindowEnum.Annotator;

        while (element != null && element is not TabItem)
            element = element.Parent as FrameworkElement;

        if (element is not TabItem || element.Tag == null)
            return WindowEnum.None;

        return (WindowEnum)element.Tag;
    }


    protected override async void OnExit(ExitEventArgs e)
    {
        base.OnExit(e);

        await _host.StopAsync();
        //_host.Dispose();
    }
}