import 'package:fluentui_system_icons/fluentui_system_icons.dart';
import 'package:flutter/material.dart';
import 'package:flutter_adaptive_scaffold/flutter_adaptive_scaffold.dart';
import 'package:go_router/go_router.dart';
import 'package:umbrix/gen/assets.gen.dart';
import 'package:umbrix/core/localization/translations.dart';
import 'package:umbrix/core/router/router.dart';
import 'package:umbrix/features/stats/widget/side_bar_stats_overview.dart';
import 'package:hooks_riverpod/hooks_riverpod.dart';
import 'package:umbrix/core/theme/theme_preferences.dart';
import 'package:umbrix/core/theme/app_theme_mode.dart';
import 'package:umbrix/core/localization/locale_preferences.dart';
import 'package:umbrix/core/localization/locale_extensions.dart';
import 'package:umbrix/utils/utils.dart';

abstract interface class RootScaffold {
  static final stateKey = GlobalKey<ScaffoldState>();

  static bool canShowDrawer(BuildContext context) => Breakpoints.small.isActive(context);
}

class AdaptiveRootScaffold extends HookConsumerWidget {
  const AdaptiveRootScaffold(this.navigator, {super.key});

  final Widget navigator;

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final t = ref.watch(translationsProvider);

    final interceptBackToHome = !PlatformUtils.isDesktop;
    final proxiesLocation = const ProxiesRoute().location;
    final perAppProxyLocation = const PerAppProxyRoute().location;

    final selectedIndex = getCurrentIndex(context);

    final destinations = [
      NavigationDestination(
        icon: const Icon(FluentIcons.home_20_regular),
        selectedIcon: const Icon(FluentIcons.home_20_filled),
        label: t.home.pageTitle,
      ),
      NavigationDestination(
        icon: const Icon(FluentIcons.list_20_regular),
        selectedIcon: const Icon(FluentIcons.list_20_filled),
        label: t.proxies.pageTitle,
      ),
      NavigationDestination(
        icon: const Icon(FluentIcons.more_vertical_20_regular),
        selectedIcon: const Icon(FluentIcons.more_vertical_20_filled),
        label: t.settings.network.excludedDomains.pageTitle,
      ),
      NavigationDestination(
        icon: const Icon(FluentIcons.settings_20_filled),
        label: t.settings.pageTitle,
      ),
      NavigationDestination(
        icon: const Icon(FluentIcons.info_20_regular),
        selectedIcon: const Icon(FluentIcons.info_20_filled),
        label: t.about.pageTitle,
      ),
    ];

    return _CustomAdaptiveScaffold(
      selectedIndex: selectedIndex,
      onSelectedIndexChange: (index) {
        RootScaffold.stateKey.currentState?.closeDrawer();
        switchTab(index, context);
      },
      destinations: destinations,
      drawerDestinationRange: (3, null), // Настройки и О программе всегда в drawer
      bottomDestinationRange: (0, 3), // Первые 3 пункта в bottom nav
      useBottomSheet: useMobileRouter,
      sidebarTrailing: const Expanded(
        child: Align(
          alignment: Alignment.bottomCenter,
          child: SideBarStatsOverview(),
        ),
      ),
      body: BackButtonListener(
        onBackButtonPressed: () async {
          if (!interceptBackToHome) return false;
          final location = GoRouterState.of(context).uri.path;
          final shouldGoHome = location.startsWith(proxiesLocation) || location.startsWith(perAppProxyLocation);

          assert(() {
            debugPrint(
              'BACK_INTERCEPT AdaptiveRootScaffold location=$location shouldGoHome=$shouldGoHome',
            );
            return true;
          }());

          if (shouldGoHome) {
            const HomeRoute().go(context);
            return true;
          }
          return false;
        },
        child: navigator,
      ),
    );
  }
}

class _CustomAdaptiveScaffold extends HookConsumerWidget {
  const _CustomAdaptiveScaffold({
    required this.selectedIndex,
    required this.onSelectedIndexChange,
    required this.destinations,
    required this.drawerDestinationRange,
    required this.bottomDestinationRange,
    this.useBottomSheet = false,
    this.sidebarTrailing,
    required this.body,
  });

  final int selectedIndex;
  final Function(int) onSelectedIndexChange;
  final List<NavigationDestination> destinations;
  final (int, int?) drawerDestinationRange;
  final (int, int?) bottomDestinationRange;
  final bool useBottomSheet;
  final Widget? sidebarTrailing;
  final Widget body;

  List<NavigationDestination> destinationsSlice((int, int?) range) => destinations.sublist(range.$1, range.$2);

  int? selectedWithOffset((int, int?) range) {
    final index = selectedIndex - range.$1;
    return index < 0 || (range.$2 != null && index > (range.$2! - 1)) ? null : index;
  }

  void selectWithOffset(int index, (int, int?) range) => onSelectedIndexChange(index + range.$1);

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    return Scaffold(
      key: RootScaffold.stateKey,
      drawer: Drawer(
        width: (MediaQuery.sizeOf(context).width * 0.88).clamp(1, 304),
        child: Column(
          children: [
            // Логотип и название приложения
            Container(
              padding: const EdgeInsets.symmetric(vertical: 32),
              child: Column(
                children: [
                  Container(
                    width: 80,
                    height: 80,
                    padding: const EdgeInsets.all(12),
                    decoration: BoxDecoration(
                      borderRadius: BorderRadius.circular(20),
                      color: Theme.of(context).colorScheme.primaryContainer,
                    ),
                    child: Assets.images.umbrixLogo.image(
                      fit: BoxFit.contain,
                    ),
                  ),
                  const SizedBox(height: 16),
                  Text(
                    'Umbrix',
                    style: Theme.of(context).textTheme.headlineSmall?.copyWith(
                          fontWeight: FontWeight.bold,
                        ),
                  ),
                ],
              ),
            ),
            // Список пунктов меню
            Expanded(
              child: ListView(
                padding: const EdgeInsets.symmetric(horizontal: 16),
                children: [
                        // О программе
                        Builder(
                          builder: (context) {
                            final t = ref.watch(translationsProvider);
                            return _DrawerMenuItem(
                              icon: FluentIcons.info_24_regular,
                              selectedIcon: FluentIcons.info_24_filled,
                              label: t.about.pageTitle,
                              isSelected: false,
                              onTap: () {
                                RootScaffold.stateKey.currentState?.closeDrawer();
                                const AboutRoute().push(context);
                              },
                            );
                          },
                        ),
                        // Настройки
                        Builder(
                          builder: (context) {
                            final t = ref.watch(translationsProvider);
                            return _DrawerMenuItem(
                              icon: FluentIcons.settings_24_regular,
                              selectedIcon: FluentIcons.settings_24_filled,
                              label: t.settings.pageTitle,
                              isSelected: false,
                              onTap: () {
                                RootScaffold.stateKey.currentState?.closeDrawer();
                                const SettingsRoute().push(context);
                              },
                            );
                          },
                        ),
                        const SizedBox(height: 16),
                        const Divider(),
                        const _DrawerThemeItem(),
                        const _DrawerLanguageItem(),
                        const _DrawerLicensesItem(),
                      ],
                    ),
                  ),
                ],
              ),
            ),
      body: AdaptiveLayout(
        primaryNavigation: SlotLayout(
          config: <Breakpoint, SlotLayoutConfig>{
            // Убираем боковую навигацию для Desktop
          },
        ),
        body: SlotLayout(
          config: <Breakpoint, SlotLayoutConfig?>{
            Breakpoints.standard: SlotLayout.from(
              key: const Key('body'),
              inAnimation: AdaptiveScaffold.fadeIn,
              outAnimation: AdaptiveScaffold.fadeOut,
              builder: (context) => body,
            ),
          },
        ),
      ),
      // Нижняя навигация - первые 3 пункта для всех платформ
      bottomNavigationBar: NavigationBar(
        selectedIndex: selectedWithOffset(bottomDestinationRange) ?? 0,
        destinations: destinationsSlice(bottomDestinationRange),
        onDestinationSelected: (index) => selectWithOffset(index, bottomDestinationRange),
      ),
    );
  }
}

class _DrawerMenuItem extends StatelessWidget {
  const _DrawerMenuItem({
    required this.icon,
    required this.selectedIcon,
    required this.label,
    required this.isSelected,
    required this.onTap,
  });

  final IconData icon;
  final IconData selectedIcon;
  final String label;
  final bool isSelected;
  final VoidCallback onTap;

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.only(bottom: 4),
      child: ListTile(
        leading: Icon(
          isSelected ? selectedIcon : icon,
          size: 24,
        ),
        title: Text(
          label,
          style: TextStyle(
            fontSize: 16,
            fontWeight: isSelected ? FontWeight.w600 : FontWeight.normal,
          ),
        ),
        selected: isSelected,
        selectedTileColor: Theme.of(context).colorScheme.primaryContainer.withOpacity(0.3),
        shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.circular(12),
        ),
        onTap: onTap,
        contentPadding: const EdgeInsets.symmetric(horizontal: 20, vertical: 8),
      ),
    );
  }
}

// Виджет для выбора темы в боковом меню
class _DrawerThemeItem extends ConsumerWidget {
  const _DrawerThemeItem();

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final t = ref.watch(translationsProvider);
    final themeMode = ref.watch(themePreferencesProvider);

    return ListTile(
      leading: const Icon(FluentIcons.weather_moon_20_regular, size: 24),
      title: Text(t.settings.general.themeMode),
      subtitle: Text(themeMode.present(t)),
      onTap: () async {
        final selectedThemeMode = await showDialog<AppThemeMode>(
          context: context,
          builder: (context) => SimpleDialog(
            title: Text(t.settings.general.themeMode),
            children: AppThemeMode.values
                .map((e) => RadioListTile(
                      title: Text(e.present(t)),
                      value: e,
                      groupValue: themeMode,
                      onChanged: Navigator.of(context).maybePop,
                    ))
                .toList(),
          ),
        );
        if (selectedThemeMode != null) {
          await ref.read(themePreferencesProvider.notifier).changeThemeMode(selectedThemeMode);
        }
      },
    );
  }
}

// Виджет для выбора языка в боковом меню
class _DrawerLanguageItem extends ConsumerWidget {
  const _DrawerLanguageItem();

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final t = ref.watch(translationsProvider);
    final locale = ref.watch(localePreferencesProvider);

    return ListTile(
      leading: const Icon(FluentIcons.local_language_24_regular, size: 24),
      title: Text(t.settings.general.locale),
      subtitle: Text(locale.localeName),
      onTap: () async {
        final selectedLocale = await showDialog<AppLocale>(
          context: context,
          builder: (context) => SimpleDialog(
            title: Text(t.settings.general.locale),
            children: AppLocale.values
                .map((e) => RadioListTile(
                      title: Text(e.localeName),
                      value: e,
                      groupValue: locale,
                      onChanged: Navigator.of(context).maybePop,
                    ))
                .toList(),
          ),
        );
        if (selectedLocale != null) {
          await ref.read(localePreferencesProvider.notifier).changeLocale(selectedLocale);
        }
      },
    );
  }
}

// Виджет для открытия лицензий
class _DrawerLicensesItem extends ConsumerWidget {
  const _DrawerLicensesItem();

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final t = ref.watch(translationsProvider);

    return ListTile(
      leading: const Icon(FluentIcons.document_text_20_regular, size: 24),
      title: Text(MaterialLocalizations.of(context).licensesPageTitle),
      onTap: () {
        showLicensePage(context: context);
      },
    );
  }
}