import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:flutter_gen/gen_l10n/app_localizations.dart';
import 'package:kiwi/kiwi.dart';
import 'package:logging/logging.dart';
import 'package:nc_photos/controller/account_controller.dart';
import 'package:nc_photos/controller/pref_controller.dart';
import 'package:nc_photos/di_container.dart';
import 'package:nc_photos/event/event.dart';
import 'package:nc_photos/language_util.dart' as language_util;
import 'package:nc_photos/legacy/connect.dart' as legacy;
import 'package:nc_photos/legacy/sign_in.dart' as legacy;
import 'package:nc_photos/navigation_manager.dart';
import 'package:nc_photos/pref.dart';
import 'package:nc_photos/snack_bar_manager.dart';
import 'package:nc_photos/stream_util.dart';
import 'package:nc_photos/theme.dart';
import 'package:nc_photos/widget/album_dir_picker.dart';
import 'package:nc_photos/widget/album_importer.dart';
import 'package:nc_photos/widget/album_share_outlier_browser.dart';
import 'package:nc_photos/widget/archive_browser.dart';
import 'package:nc_photos/widget/changelog.dart';
import 'package:nc_photos/widget/collection_browser.dart';
import 'package:nc_photos/widget/collection_picker.dart';
import 'package:nc_photos/widget/connect.dart';
import 'package:nc_photos/widget/enhanced_photo_browser.dart';
import 'package:nc_photos/widget/home.dart';
import 'package:nc_photos/widget/image_editor.dart';
import 'package:nc_photos/widget/image_enhancer.dart';
import 'package:nc_photos/widget/local_file_viewer.dart';
import 'package:nc_photos/widget/people_browser.dart';
import 'package:nc_photos/widget/places_browser.dart';
import 'package:nc_photos/widget/result_viewer.dart';
import 'package:nc_photos/widget/root_picker.dart';
import 'package:nc_photos/widget/settings.dart';
import 'package:nc_photos/widget/settings/account_settings.dart';
import 'package:nc_photos/widget/settings/language_settings.dart';
import 'package:nc_photos/widget/setup.dart';
import 'package:nc_photos/widget/share_folder_picker.dart';
import 'package:nc_photos/widget/shared_file_viewer.dart';
import 'package:nc_photos/widget/sharing_browser.dart';
import 'package:nc_photos/widget/sign_in.dart';
import 'package:nc_photos/widget/slideshow_viewer.dart';
import 'package:nc_photos/widget/splash.dart';
import 'package:nc_photos/widget/trashbin_browser.dart';
import 'package:nc_photos/widget/trashbin_viewer.dart';
import 'package:nc_photos/widget/viewer.dart';
import 'package:np_codegen/np_codegen.dart';

part 'my_app.g.dart';

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    final DiContainer _c = KiwiContainer().resolve<DiContainer>();
    return MultiRepositoryProvider(
      providers: [
        RepositoryProvider(
          create: (_) => AccountController(),
        ),
        RepositoryProvider(
          create: (_) => PrefController(_c),
        ),
      ],
      child: const _WrappedApp(),
    );
  }

  static RouteObserver get routeObserver => _routeObserver;

  static BuildContext get globalContext => _globalContext;

  static final _routeObserver = RouteObserver<PageRoute>();
  static late BuildContext _globalContext;
}

class _WrappedApp extends StatefulWidget {
  const _WrappedApp();

  @override
  State<StatefulWidget> createState() => _WrappedAppState();
}

@npLog
class _WrappedAppState extends State<_WrappedApp>
    implements SnackBarHandler, NavigationHandler {
  @override
  void initState() {
    super.initState();
    SnackBarManager().registerHandler(this);
    NavigationManager().setHandler(this);
    _themeChangedListener =
        AppEventListener<ThemeChangedEvent>(_onThemeChangedEvent)..begin();
  }

  @override
  build(BuildContext context) {
    final ThemeMode themeMode;
    if (Pref().isFollowSystemThemeOr(false)) {
      themeMode = ThemeMode.system;
    } else {
      themeMode =
          Pref().isDarkThemeOr(false) ? ThemeMode.dark : ThemeMode.light;
    }
    final prefController = context.read<PrefController>();
    return ValueStreamBuilder<language_util.AppLanguage>(
      stream: prefController.language,
      builder: (context, snapshot) => MaterialApp(
        onGenerateTitle: (context) => AppLocalizations.of(context)!.appTitle,
        theme: buildLightTheme(),
        darkTheme: buildDarkTheme(),
        themeMode: themeMode,
        initialRoute: Splash.routeName,
        onGenerateRoute: _onGenerateRoute,
        navigatorObservers: <NavigatorObserver>[MyApp.routeObserver],
        navigatorKey: _navigatorKey,
        scaffoldMessengerKey: _scaffoldMessengerKey,
        locale: snapshot.requireData.locale,
        localizationsDelegates: AppLocalizations.localizationsDelegates,
        supportedLocales: const <Locale>[
          // the order here doesn't matter, except for the first one, which must
          // be en
          Locale("en"),
          Locale("el"),
          Locale("es"),
          Locale("fr"),
          Locale("ru"),
          Locale("de"),
          Locale("cs"),
          Locale("fi"),
          Locale("pl"),
          Locale("pt"),
          Locale.fromSubtags(languageCode: "zh", scriptCode: "Hans"),
          Locale.fromSubtags(languageCode: "zh", scriptCode: "Hant"),
          Locale("it"),
          Locale("nl"),
        ],
        builder: (context, child) {
          MyApp._globalContext = context;
          return child!;
        },
        debugShowCheckedModeBanner: false,
        scrollBehavior: const _MyScrollBehavior(),
      ),
    );
  }

  @override
  void dispose() {
    super.dispose();
    SnackBarManager().unregisterHandler(this);
    NavigationManager().unsetHandler(this);
    _themeChangedListener.end();
  }

  @override
  showSnackBar(SnackBar snackBar) =>
      _scaffoldMessengerKey.currentState?.showSnackBar(snackBar);

  @override
  getNavigator() => _navigatorKey.currentState;

  Map<String, Route Function()> _getRouter() => {
        Setup.routeName: () => MaterialPageRoute(
              builder: (context) => const Setup(),
            ),
        SignIn.routeName: () => MaterialPageRoute(
              builder: (context) => const SignIn(),
            ),
        Splash.routeName: () => MaterialPageRoute(
              builder: (context) => const Splash(),
            ),
        legacy.SignIn.routeName: () => MaterialPageRoute(
              builder: (context) => const legacy.SignIn(),
            ),
        CollectionPicker.routeName: CollectionPicker.buildRoute,
        LanguageSettings.routeName: LanguageSettings.buildRoute,
        AccountSettings.routeName: AccountSettings.buildRoute,
      };

  Route<dynamic>? _onGenerateRoute(RouteSettings settings) {
    _log.info("[_onGenerateRoute] Route: ${settings.name}");
    Route<dynamic>? route;
    route ??= _handleBasicRoute(settings);
    route ??= _handleViewerRoute(settings);
    route ??= _handleConnectRoute(settings);
    route ??= _handleConnectLegacyRoute(settings);
    route ??= _handleHomeRoute(settings);
    route ??= _handleRootPickerRoute(settings);
    route ??= _handleSettingsRoute(settings);
    route ??= _handleArchiveBrowserRoute(settings);
    route ??= _handleAlbumDirPickerRoute(settings);
    route ??= _handleAlbumImporterRoute(settings);
    route ??= _handleTrashbinBrowserRoute(settings);
    route ??= _handleTrashbinViewerRoute(settings);
    route ??= _handleSlideshowViewerRoute(settings);
    route ??= _handleSharingBrowserRoute(settings);
    route ??= _handleSharedFileViewerRoute(settings);
    route ??= _handleAlbumShareOutlierBrowserRoute(settings);
    route ??= _handleShareFolderPickerRoute(settings);
    route ??= _handleEnhancedPhotoBrowserRoute(settings);
    route ??= _handleLocalFileViewerRoute(settings);
    route ??= _handleEnhancementSettingsRoute(settings);
    route ??= _handleImageEditorRoute(settings);
    route ??= _handleChangelogRoute(settings);
    route ??= _handlePeopleBrowserRoute(settings);
    route ??= _handlePlacesBrowserRoute(settings);
    route ??= _handleResultViewerRoute(settings);
    route ??= _handleImageEnhancerRoute(settings);
    route ??= _handleCollectionBrowserRoute(settings);
    return route;
  }

  void _onThemeChangedEvent(ThemeChangedEvent ev) {
    setState(() {});
  }

  Route<dynamic>? _handleBasicRoute(RouteSettings settings) {
    for (final e in _getRouter().entries) {
      if (e.key == settings.name) {
        return e.value();
      }
    }
    return null;
  }

  Route<dynamic>? _handleViewerRoute(RouteSettings settings) {
    try {
      if (settings.name == Viewer.routeName && settings.arguments != null) {
        final args = settings.arguments as ViewerArguments;
        return Viewer.buildRoute(args);
      }
    } catch (e) {
      _log.severe("[_handleViewerRoute] Failed while handling route", e);
    }
    return null;
  }

  Route<dynamic>? _handleConnectRoute(RouteSettings settings) {
    try {
      if (settings.name == Connect.routeName && settings.arguments != null) {
        final args = settings.arguments as ConnectArguments;
        return Connect.buildRoute(args);
      }
    } catch (e) {
      _log.severe("[_handleConnectRoute] Failed while handling route", e);
    }
    return null;
  }

  Route<dynamic>? _handleConnectLegacyRoute(RouteSettings settings) {
    try {
      if (settings.name == legacy.Connect.routeName &&
          settings.arguments != null) {
        final args = settings.arguments as legacy.ConnectArguments;
        return legacy.Connect.buildRoute(args);
      }
    } catch (e) {
      _log.severe("[_handleConnectLegacyRoute] Failed while handling route", e);
    }
    return null;
  }

  Route<dynamic>? _handleHomeRoute(RouteSettings settings) {
    try {
      if (settings.name == Home.routeName && settings.arguments != null) {
        final args = settings.arguments as HomeArguments;
        // move this elsewhere later
        context.read<AccountController>().setCurrentAccount(args.account);
        return Home.buildRoute(args);
      }
    } catch (e) {
      _log.severe("[_handleHomeRoute] Failed while handling route", e);
    }
    return null;
  }

  Route<dynamic>? _handleRootPickerRoute(RouteSettings settings) {
    try {
      if (settings.name == RootPicker.routeName && settings.arguments != null) {
        final args = settings.arguments as RootPickerArguments;
        return RootPicker.buildRoute(args);
      }
    } catch (e) {
      _log.severe("[_handleRootPickerRoute] Failed while handling route", e);
    }
    return null;
  }

  Route<dynamic>? _handleSettingsRoute(RouteSettings settings) {
    try {
      if (settings.name == Settings.routeName && settings.arguments != null) {
        final args = settings.arguments as SettingsArguments;
        return Settings.buildRoute(args);
      }
    } catch (e) {
      _log.severe("[_handleSettingsRoute] Failed while handling route", e);
    }
    return null;
  }

  Route<dynamic>? _handleArchiveBrowserRoute(RouteSettings settings) {
    try {
      if (settings.name == ArchiveBrowser.routeName &&
          settings.arguments != null) {
        final args = settings.arguments as ArchiveBrowserArguments;
        return ArchiveBrowser.buildRoute(args);
      }
    } catch (e) {
      _log.severe(
          "[_handleArchiveBrowserRoute] Failed while handling route", e);
    }
    return null;
  }

  Route<dynamic>? _handleAlbumDirPickerRoute(RouteSettings settings) {
    try {
      if (settings.name == AlbumDirPicker.routeName &&
          settings.arguments != null) {
        final args = settings.arguments as AlbumDirPickerArguments;
        return AlbumDirPicker.buildRoute(args);
      }
    } catch (e) {
      _log.severe(
          "[_handleAlbumDirPickerRoute] Failed while handling route", e);
    }
    return null;
  }

  Route<dynamic>? _handleAlbumImporterRoute(RouteSettings settings) {
    try {
      if (settings.name == AlbumImporter.routeName &&
          settings.arguments != null) {
        final args = settings.arguments as AlbumImporterArguments;
        return AlbumImporter.buildRoute(args);
      }
    } catch (e) {
      _log.severe("[_handleAlbumImporterRoute] Failed while handling route", e);
    }
    return null;
  }

  Route<dynamic>? _handleTrashbinBrowserRoute(RouteSettings settings) {
    try {
      if (settings.name == TrashbinBrowser.routeName &&
          settings.arguments != null) {
        final args = settings.arguments as TrashbinBrowserArguments;
        return TrashbinBrowser.buildRoute(args);
      }
    } catch (e) {
      _log.severe(
          "[_handleTrashbinBrowserRoute] Failed while handling route", e);
    }
    return null;
  }

  Route<dynamic>? _handleTrashbinViewerRoute(RouteSettings settings) {
    try {
      if (settings.name == TrashbinViewer.routeName &&
          settings.arguments != null) {
        final args = settings.arguments as TrashbinViewerArguments;
        return TrashbinViewer.buildRoute(args);
      }
    } catch (e) {
      _log.severe(
          "[_handleTrashbinViewerRoute] Failed while handling route", e);
    }
    return null;
  }

  Route<dynamic>? _handleSlideshowViewerRoute(RouteSettings settings) {
    try {
      if (settings.name == SlideshowViewer.routeName &&
          settings.arguments != null) {
        final args = settings.arguments as SlideshowViewerArguments;
        return SlideshowViewer.buildRoute(args);
      }
    } catch (e) {
      _log.severe(
          "[_handleSlideshowViewerRoute] Failed while handling route", e);
    }
    return null;
  }

  Route<dynamic>? _handleSharingBrowserRoute(RouteSettings settings) {
    try {
      if (settings.name == SharingBrowser.routeName &&
          settings.arguments != null) {
        final args = settings.arguments as SharingBrowserArguments;
        return SharingBrowser.buildRoute(args);
      }
    } catch (e) {
      _log.severe(
          "[_handleSharingBrowserRoute] Failed while handling route", e);
    }
    return null;
  }

  Route<dynamic>? _handleSharedFileViewerRoute(RouteSettings settings) {
    try {
      if (settings.name == SharedFileViewer.routeName &&
          settings.arguments != null) {
        final args = settings.arguments as SharedFileViewerArguments;
        return SharedFileViewer.buildRoute(args);
      }
    } catch (e) {
      _log.severe(
          "[_handleSharedFileViewerRoute] Failed while handling route", e);
    }
    return null;
  }

  Route<dynamic>? _handleAlbumShareOutlierBrowserRoute(RouteSettings settings) {
    try {
      if (settings.name == AlbumShareOutlierBrowser.routeName &&
          settings.arguments != null) {
        final args = settings.arguments as AlbumShareOutlierBrowserArguments;
        return AlbumShareOutlierBrowser.buildRoute(args);
      }
    } catch (e) {
      _log.severe(
          "[_handleAlbumShareOutlierBrowserRoute] Failed while handling route",
          e);
    }
    return null;
  }

  Route<dynamic>? _handleShareFolderPickerRoute(RouteSettings settings) {
    try {
      if (settings.name == ShareFolderPicker.routeName &&
          settings.arguments != null) {
        final args = settings.arguments as ShareFolderPickerArguments;
        return ShareFolderPicker.buildRoute(args);
      }
    } catch (e) {
      _log.severe(
          "[_handleShareFolderPickerRoute] Failed while handling route", e);
    }
    return null;
  }

  Route<dynamic>? _handleEnhancedPhotoBrowserRoute(RouteSettings settings) {
    try {
      if (settings.name == EnhancedPhotoBrowser.routeName &&
          settings.arguments != null) {
        final args = settings.arguments as EnhancedPhotoBrowserArguments;
        return EnhancedPhotoBrowser.buildRoute(args);
      } else if (settings.name
              ?.startsWith("${EnhancedPhotoBrowser.routeName}?") ==
          true) {
        final queries = Uri.parse(settings.name!).queryParameters;
        final args = EnhancedPhotoBrowserArguments(queries["filename"]);
        return EnhancedPhotoBrowser.buildRoute(args);
      }
    } catch (e) {
      _log.severe(
          "[_handleEnhancedPhotoBrowserRoute] Failed while handling route", e);
    }
    return null;
  }

  Route<dynamic>? _handleLocalFileViewerRoute(RouteSettings settings) {
    try {
      if (settings.name == LocalFileViewer.routeName &&
          settings.arguments != null) {
        final args = settings.arguments as LocalFileViewerArguments;
        return LocalFileViewer.buildRoute(args);
      }
    } catch (e) {
      _log.severe(
          "[_handleLocalFileViewerRoute] Failed while handling route", e);
    }
    return null;
  }

  Route<dynamic>? _handleEnhancementSettingsRoute(RouteSettings settings) {
    try {
      if (settings.name == EnhancementSettings.routeName) {
        return EnhancementSettings.buildRoute();
      }
    } catch (e) {
      _log.severe(
          "[_handleEnhancementSettingsRoute] Failed while handling route", e);
    }
    return null;
  }

  Route<dynamic>? _handleImageEditorRoute(RouteSettings settings) {
    try {
      if (settings.name == ImageEditor.routeName &&
          settings.arguments != null) {
        final args = settings.arguments as ImageEditorArguments;
        return ImageEditor.buildRoute(args);
      }
    } catch (e) {
      _log.severe("[_handleImageEditorRoute] Failed while handling route", e);
    }
    return null;
  }

  Route<dynamic>? _handleChangelogRoute(RouteSettings settings) {
    try {
      if (settings.name == Changelog.routeName) {
        if (settings.arguments != null) {
          final args = settings.arguments as ChangelogArguments;
          return Changelog.buildRoute(args);
        } else {
          return MaterialPageRoute(builder: (_) => const Changelog());
        }
      }
    } catch (e) {
      _log.severe("[_handleChangelogRoute] Failed while handling route", e);
    }
    return null;
  }

  Route<dynamic>? _handlePeopleBrowserRoute(RouteSettings settings) {
    try {
      if (settings.name == PeopleBrowser.routeName &&
          settings.arguments != null) {
        final args = settings.arguments as PeopleBrowserArguments;
        return PeopleBrowser.buildRoute(args);
      }
    } catch (e) {
      _log.severe("[_handlePeopleBrowserRoute] Failed while handling route", e);
    }
    return null;
  }

  Route<dynamic>? _handlePlacesBrowserRoute(RouteSettings settings) {
    try {
      if (settings.name == PlacesBrowser.routeName &&
          settings.arguments != null) {
        final args = settings.arguments as PlacesBrowserArguments;
        return PlacesBrowser.buildRoute(args);
      }
    } catch (e) {
      _log.severe("[_handlePlacesBrowserRoute] Failed while handling route", e);
    }
    return null;
  }

  Route<dynamic>? _handleResultViewerRoute(RouteSettings settings) {
    try {
      if (settings.name == ResultViewer.routeName &&
          settings.arguments != null) {
        final args = settings.arguments as ResultViewerArguments;
        return ResultViewer.buildRoute(args);
      } else if (settings.name?.startsWith("${ResultViewer.routeName}?") ==
          true) {
        final queries = Uri.parse(settings.name!).queryParameters;
        final args = ResultViewerArguments(queries["url"]!);
        return ResultViewer.buildRoute(args);
      }
    } catch (e, stackTrace) {
      _log.severe("[_handleResultViewerRoute] Failed while handling route", e,
          stackTrace);
    }
    return null;
  }

  Route<dynamic>? _handleImageEnhancerRoute(RouteSettings settings) {
    try {
      if (settings.name == ImageEnhancer.routeName &&
          settings.arguments != null) {
        final args = settings.arguments as ImageEnhancerArguments;
        return ImageEnhancer.buildRoute(args);
      }
    } catch (e) {
      _log.severe("[_handleImageEnhancerRoute] Failed while handling route", e);
    }
    return null;
  }

  Route<dynamic>? _handleCollectionBrowserRoute(RouteSettings settings) {
    try {
      if (settings.name == CollectionBrowser.routeName &&
          settings.arguments != null) {
        final args = settings.arguments as CollectionBrowserArguments;
        return CollectionBrowser.buildRoute(args);
      }
    } catch (e) {
      _log.severe(
          "[_handleCollectionBrowserRoute] Failed while handling route", e);
    }
    return null;
  }

  final _scaffoldMessengerKey = GlobalKey<ScaffoldMessengerState>();
  final _navigatorKey = GlobalKey<NavigatorState>();

  late AppEventListener<ThemeChangedEvent> _themeChangedListener;
}

class _MyScrollBehavior extends MaterialScrollBehavior {
  const _MyScrollBehavior();

  @override
  get dragDevices => {
        PointerDeviceKind.touch,
        PointerDeviceKind.stylus,
        PointerDeviceKind.invertedStylus,
        PointerDeviceKind.mouse,
      };
}