import 'package:flutter/material.dart';

import '../../../../l10n/app_localizations.dart';
import '../../../../shared/theme/design_tokens.dart';
import '../../data/models/profile_settings.dart';
import '../widgets/settings_section_widgets.dart';
import 'language_settings_screen.dart';

class GeneralSettingsScreen extends StatefulWidget {
  const GeneralSettingsScreen({
    super.key,
    required this.settings,
    required this.onSettingsChanged,
  });

  final ProfileSettingsV1 settings;
  final Future<void> Function(ProfileSettingsV1 settings) onSettingsChanged;

  @override
  State<GeneralSettingsScreen> createState() => _GeneralSettingsScreenState();
}

class _GeneralSettingsScreenState extends State<GeneralSettingsScreen> {
  late ProfileSettingsV1 _settings;

  @override
  void initState() {
    super.initState();
    _settings = widget.settings;
  }

  @override
  Widget build(BuildContext context) {
    final l10n = AppLocalizations.of(context)!;
    final colors = Theme.of(context).colorScheme;

    return PopScope<ProfileSettingsV1>(
      canPop: false,
      onPopInvokedWithResult: (didPop, result) {
        if (didPop) {
          return;
        }
        Navigator.of(context).pop(_settings);
      },
      child: Scaffold(
        backgroundColor: colors.surfaceContainerLow,
        appBar: AppBar(
          leading: IconButton(
            onPressed: () => Navigator.of(context).pop(_settings),
            icon: const Icon(Icons.arrow_back_ios_new_rounded),
          ),
          title: Text(l10n.settingsGeneralTitle),
          centerTitle: true,
          backgroundColor: colors.surfaceContainerLow,
          surfaceTintColor: colors.surfaceContainerLow,
        ),
        body: ListView(
          padding: const EdgeInsets.all(AppSpacing.lg),
          children: [
            SectionLabel(text: l10n.settingsSectionGeneral),
            SettingsGroupCard(
              children: [
                SettingsMenuTile(
                  icon: Icons.language_rounded,
                  title: l10n.settingsInterfaceLanguage,
                  subtitle: displayLanguageLabel(
                    l10n,
                    _settings.preferences.interfaceLanguage,
                  ),
                  tint: colors.primary,
                  background: colors.surfaceContainerHighest,
                  onTap: () => _selectLanguage(
                    _settings.preferences.interfaceLanguage,
                    (lang) => setState(() {
                      _settings = _settings.copyWith(
                        preferences: _settings.preferences.copyWith(
                          interfaceLanguage: lang,
                        ),
                      );
                    }),
                  ),
                ),
                SettingsMenuTile(
                  icon: Icons.smart_toy_rounded,
                  title: l10n.settingsAiLanguage,
                  subtitle: displayLanguageLabel(
                    l10n,
                    _settings.preferences.aiLanguage,
                  ),
                  tint: colors.primary,
                  background: colors.surfaceContainerHighest,
                  showDivider: false,
                  onTap: () => _selectLanguage(
                    _settings.preferences.aiLanguage,
                    (lang) => setState(() {
                      _settings = _settings.copyWith(
                        preferences: _settings.preferences.copyWith(
                          aiLanguage: lang,
                        ),
                      );
                    }),
                  ),
                ),
              ],
            ),
            const SizedBox(height: AppSpacing.lg),
            SectionLabel(text: l10n.settingsSectionPrivacy),
            SettingsGroupCard(
              children: [
                SettingsSwitchTile(
                  icon: Icons.security_rounded,
                  title: l10n.settingsDoNotSellTitle,
                  value: _settings.privacy.canSell,
                  tint: colors.primary,
                  background: colors.surfaceContainerHighest,
                  showDivider: false,
                  onChanged: (value) => _updatePrivacy(canSell: value),
                ),
              ],
            ),
            const SizedBox(height: AppSpacing.lg),
            SectionLabel(text: l10n.settingsSectionNotification),
            SettingsGroupCard(
              children: [
                SettingsSwitchTile(
                  icon: Icons.notifications_rounded,
                  title: l10n.settingsNotificationAllow,
                  value: _settings.notification.allowNotifications,
                  tint: colors.primary,
                  background: colors.surfaceContainerHighest,
                  onChanged: (value) =>
                      _updateNotification(allowNotifications: value),
                ),
                SettingsSwitchTile(
                  icon: Icons.vibration_rounded,
                  title: l10n.settingsNotificationVibration,
                  value: _settings.notification.allowVibration,
                  tint: colors.primary,
                  background: colors.surfaceContainerHighest,
                  showDivider: false,
                  onChanged: (value) =>
                      _updateNotification(allowVibration: value),
                ),
              ],
            ),
          ],
        ),
      ),
    );
  }

  Future<void> _selectLanguage(
    String currentLanguage,
    void Function(String) onChanged,
  ) async {
    final result = await Navigator.of(context).push<String>(
      MaterialPageRoute<String>(
        builder: (_) =>
            LanguageSettingsScreen(selectedLanguageTag: currentLanguage),
      ),
    );
    if (result == null || result == currentLanguage) {
      return;
    }
    onChanged(result);
    await widget.onSettingsChanged(_settings);
  }

  void _updatePrivacy({bool? canSell}) {
    final newPrivacy = _settings.privacy.copyWith(canSell: canSell);
    final newSettings = _settings.copyWith(privacy: newPrivacy);
    setState(() {
      _settings = newSettings;
    });
    widget.onSettingsChanged(newSettings);
  }

  void _updateNotification({bool? allowNotifications, bool? allowVibration}) {
    final newNotification = _settings.notification.copyWith(
      allowNotifications: allowNotifications,
      allowVibration: allowVibration,
    );
    final newSettings = _settings.copyWith(notification: newNotification);
    setState(() {
      _settings = newSettings;
    });
    widget.onSettingsChanged(newSettings);
  }
}