using CommunityToolkit.Maui;
using Jugenddienst_Stunden.Models;
using Jugenddienst_Stunden.Interfaces;
using Jugenddienst_Stunden.Repositories;
using Jugenddienst_Stunden.Services;
using Jugenddienst_Stunden.Infrastructure;
using Jugenddienst_Stunden.Validators;
using Microsoft.Extensions.Logging;
using ZXing.Net.Maui.Controls;
using System.Net.Http;
using Jugenddienst_Stunden.ViewModels;

namespace Jugenddienst_Stunden;

/// <summary>
/// Das Hauptprogramm.
/// </summary>
public static class MauiProgram {
	public static MauiApp CreateMauiApp() {
		var builder = MauiApp.CreateBuilder();
		builder
			.UseMauiApp<App>()
			// Initialize the .NET MAUI Community Toolkit by adding the below line of code
			.UseMauiCommunityToolkit(options => { options.SetShouldEnableSnackbarOnWindows(true); })
			.ConfigureFonts(fonts => {
				fonts.AddFont("OpenSans-Regular.ttf", "OpenSansRegular");
				fonts.AddFont("OpenSans-Semibold.ttf", "OpenSansSemibold");
			})
			//.UseBarcodeScanning();
			.UseBarcodeReader();

		//#if DEBUG
		//		if (string.IsNullOrWhiteSpace(GlobalVar.ApiKey)) {
		//			GlobalVar.ApiKey = Preferences.Default.Get("apiKey",
		//				"MTQxfHNkdFptQkNZTXlPT3ZyMHNBZDl0UnVxNExMRXxodHRwOi8vaG91cnMuZGF1bmkubWluZS5udTo4MS9hcHBhcGk=");
		//			GlobalVar.Name = Preferences.Default.Get("name", "Testserver: Isabell");
		//			GlobalVar.Surname = Preferences.Default.Get("surname", "Biasi");
		//			GlobalVar.EmployeeId = Preferences.Default.Get("EmployeeId", 141);
		//			GlobalVar.ApiUrl = Preferences.Default.Get("apiUrl", "https://hours.dauni.mine.nu/appapi");
		//		}

		//		builder.Logging.AddDebug();
		//#endif

		// DI: AlertService für globale Alerts (z. B. leere ApiUrl)
		builder.Services.AddSingleton<IAlertService, AlertService>();

		// DI: Settings aus Preferences (Single Source of Truth bleibt Preferences)
		builder.Services.AddSingleton<IAppSettings, PreferencesAppSettings>();

		// DI: ApiOptions IMMER aus aktuellen Settings erzeugen (nicht beim Start einfrieren)
		builder.Services.AddTransient(sp => new ApiOptions {
			BaseUrl = sp.GetRequiredService<IAppSettings>().ApiUrl, Timeout = TimeSpan.FromSeconds(15)
		});

		// Token Provider soll ebenfalls aus Settings/Preferences lesen
		builder.Services.AddSingleton<ITokenProvider, SettingsTokenProvider>();

		// HttpClient + ApiClient
		// Configure HttpClient with RequestLoggingHandler and disable automatic redirects for diagnosis
		builder.Services.AddTransient<RequestLoggingHandler>();
		builder.Services.AddSingleton<HttpClient>(sp => {
			var nativeHandler = new HttpClientHandler { AllowAutoRedirect = false };
			var logging = sp.GetRequiredService<RequestLoggingHandler>();
			logging.InnerHandler = nativeHandler;
			// HttpClient.Timeout will be adjusted by ApiClient if needed
			return new HttpClient(logging, disposeHandler: true);
		});

		builder.Services.AddSingleton<IApiClient>(sp => {
			var alert = sp.GetRequiredService<IAlertService>();
			try {
				return new ApiClient(
					sp.GetRequiredService<HttpClient>(),
					sp.GetRequiredService<ApiOptions>(),
					sp.GetRequiredService<ITokenProvider>(),
					sp.GetRequiredService<IAppSettings>());
			} catch (Exception e) {
				// Alert an UI/VM weiterreichen
				alert.Raise(e.Message);
				// Fallback: NullApiClient liefert beim Aufruf aussagekräftige Exception
				return new NullApiClient(e.Message);
			}
		});

		// DI: Infrastruktur
		//builder.Services.AddSingleton(new ApiOptions { BaseUrl = GlobalVar.ApiUrl, Timeout = TimeSpan.FromSeconds(15) });
		//builder.Services.AddSingleton<ITokenProvider, GlobalVarTokenProvider>();
		//builder.Services.AddSingleton<HttpClient>(_ => new HttpClient());
		//builder.Services.AddSingleton<IApiClient>(sp => new ApiClient(
		//    sp.GetRequiredService<HttpClient>(),
		//    sp.GetRequiredService<ApiOptions>(),
		//    sp.GetRequiredService<ITokenProvider>()));

		// DI: Validatoren
		builder.Services.AddSingleton<IHoursValidator, HoursValidator>();

  // DI: Services & Repositories
  builder.Services.AddSingleton<IHoursRepository, HoursRepository>();
  builder.Services.AddSingleton<IHoursService, HoursService>();
  builder.Services.AddSingleton<IAuthService, AuthService>();

  // DI: Views/ViewModels
  builder.Services.AddTransient<ViewModels.StundenViewModel>();
  builder.Services.AddTransient<Views.StundenPage>();
  builder.Services.AddTransient<ViewModels.LoginViewModel>();
  builder.Services.AddTransient<Views.LoginPage>();

		return builder.Build();
	}
}