import 'package:flutter/material.dart';

import '../../../../data/network/api_client.dart';
import '../../../../l10n/app_localizations.dart';
import '../../../../shared/theme/design_tokens.dart';
import '../../../../shared/widgets/app_modal_dialog.dart';
import '../../../../shared/widgets/gua_icon.dart';
import '../../data/models/profile_settings.dart';
import '../../data/repositories/invite_repository.dart';
import '../models/legal_document_type.dart';
import '../utils/legal_document_assets.dart';
import 'account_delete_screen.dart';
import '../widgets/settings_section_widgets.dart';
import 'coin_center_screen.dart';
import 'feedback_screen.dart';
import 'general_settings_screen.dart';
import 'invite_screen.dart';
import 'legal_document_screen.dart';
import 'profile_edit_screen.dart';

class SettingsScreen extends StatefulWidget {
  const SettingsScreen({
    super.key,
    required this.account,
    required this.userId,
    required this.settings,
    required this.coinBalance,
    required this.inviteRepository,
    required this.apiClient,
    required this.onInterfaceLanguageChanged,
    required this.onSettingsChanged,
    required this.onUploadAvatar,
    required this.onLogout,
    required this.onDeleteAccount,
    required this.onSaveProfile,
    required this.onBalanceChanged,
  });

  final String account;
  final String userId;
  final ProfileSettingsV1 settings;
  final int coinBalance;
  final InviteRepository inviteRepository;
  final ApiClient apiClient;
  final Future<void> Function(String languageTag) onInterfaceLanguageChanged;
  final Future<void> Function(ProfileSettingsV1 settings) onSettingsChanged;
  final Future<ProfileSettingsV1> Function(String filePath) onUploadAvatar;
  final Future<void> Function() onLogout;
  final Future<void> Function() onDeleteAccount;
  final Future<ProfileSettingsV1> Function(ProfileSettingsV1 updated)
      onSaveProfile;
  final void Function(int newBalance) onBalanceChanged;

  @override
  State<SettingsScreen> createState() => _SettingsScreenState();
}

class _SettingsScreenState extends State<SettingsScreen> {
  late ProfileSettingsV1 _settings;

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

  @override
  void didUpdateWidget(covariant SettingsScreen oldWidget) {
    super.didUpdateWidget(oldWidget);
    if (oldWidget.settings != widget.settings) {
      _settings = widget.settings;
    }
  }

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

    return Scaffold(
      backgroundColor: colors.surfaceContainerLow,
      appBar: AppBar(
        title: Text(l10n.settingsTitle),
        centerTitle: true,
        backgroundColor: colors.surfaceContainerLow,
        surfaceTintColor: colors.surfaceContainerLow,
      ),
      body: ListView(
        padding: const EdgeInsets.fromLTRB(
          AppSpacing.lg,
          AppSpacing.md,
          AppSpacing.lg,
          AppSpacing.xl,
        ),
        children: [
          ProfileHeaderCard(
            account: widget.account,
            displayName: _settings.displayName.isEmpty
                ? widget.account
                : _settings.displayName,
            bio: _settings.bio,
            avatarUrl: _settings.avatarUrl,
            onEditTap: _openProfileEdit,
          ),
          const SizedBox(height: AppSpacing.lg),
          WalletHeroCard(
            balance: widget.coinBalance,
            subtitle: l10n.settingsCoinHeroSubtitle,
            onTap: _openCoinCenter,
          ),
          const SizedBox(height: AppSpacing.xl),
          SettingsGroupCard(
            children: [
              SettingsMenuTile(
                icon: Icons.tune_rounded,
                title: l10n.settingsGeneralTitle,
                tint: colors.primary,
                background: colors.surfaceContainerHighest,
                onTap: _openGeneralSettings,
              ),
              SettingsMenuTile(
                icon: Icons.card_giftcard_rounded,
                title: l10n.settingsInviteTitle,
                tint: colors.primary,
                background: colors.surfaceContainerHighest,
                onTap: _openInvite,
              ),
              SettingsMenuTile(
                icon: Icons.feedback_outlined,
                title: l10n.settingsFeedbackTitle,
                tint: colors.primary,
                background: colors.surfaceContainerHighest,
                onTap: () => Navigator.of(context).push<void>(
                  MaterialPageRoute<void>(
                    builder: (_) => FeedbackScreen(apiClient: widget.apiClient),
                  ),
                ),
              ),
              SettingsMenuTile(
                icon: Icons.person_rounded,
                title: l10n.settingsAccountAndDataTitle,
                tint: colors.primary,
                background: colors.surfaceContainerHighest,
                showDivider: false,
                onTap: _openAccountDelete,
              ),
            ],
          ),
          const SizedBox(height: AppSpacing.xl),
          SettingsGroupCard(
            children: [
              SettingsMenuTile(
                icon: Icons.info_outline_rounded,
                title: l10n.aboutUs,
                tint: colors.secondary,
                background: colors.surfaceContainerHighest,
                onTap: () => _openLegalDocument(LegalDocumentType.aboutUs),
              ),
              SettingsMenuTile(
                icon: Icons.security_rounded,
                title: l10n.privacyPolicy,
                tint: colors.secondary,
                background: colors.surfaceContainerHighest,
                onTap: () => _openLegalDocument(LegalDocumentType.privacyPolicy),
              ),
              SettingsMenuTile(
                icon: Icons.description_outlined,
                title: l10n.termsOfService,
                tint: colors.secondary,
                background: colors.surfaceContainerHighest,
                showDivider: false,
                onTap: () => _openLegalDocument(LegalDocumentType.termsOfService),
              ),
            ],
          ),
          const SizedBox(height: AppSpacing.xl),
          FilledButton(
            onPressed: _confirmLogout,
            style: FilledButton.styleFrom(
              elevation: 0,
              backgroundColor: colors.error,
              foregroundColor: colors.onError,
              padding: const EdgeInsets.symmetric(vertical: AppSpacing.lg),
              shape: RoundedRectangleBorder(
                borderRadius: BorderRadius.circular(AppRadius.full),
              ),
            ),
            child: Text(l10n.logout),
          ),
        ],
      ),
    );
  }

  Future<void> _openCoinCenter() async {
    await Navigator.of(context).push<void>(
      MaterialPageRoute<void>(
        builder: (_) => CoinCenterScreen(
          balance: widget.coinBalance,
          userId: widget.userId,
          onBalanceChanged: widget.onBalanceChanged,
        ),
      ),
    );
  }

  Future<void> _openGeneralSettings() async {
    await Navigator.of(context).push<void>(
      MaterialPageRoute<void>(
        builder: (_) => GeneralSettingsScreen(
          settings: _settings,
          onSettingsChanged: (newSettings) async {
            await widget.onSettingsChanged(newSettings);
            if (!mounted) return;
            setState(() {
              _settings = newSettings;
            });
          },
        ),
      ),
    );
  }

  Future<void> _openInvite() async {
    await Navigator.of(context).push<void>(
      MaterialPageRoute<void>(
        builder: (_) => InviteScreen(inviteRepository: widget.inviteRepository),
      ),
    );
  }

  Future<void> _openProfileEdit() async {
    final result = await Navigator.of(context).push<ProfileSettingsV1>(
      MaterialPageRoute<ProfileSettingsV1>(
        builder: (_) => ProfileEditScreen(
          account: widget.account,
          settings: _settings,
          onUploadAvatar: widget.onUploadAvatar,
          onSave: widget.onSaveProfile,
        ),
      ),
    );
    if (result == null || !mounted) {
      return;
    }
    setState(() {
      _settings = result;
    });
  }

  void _openLegalDocument(LegalDocumentType type) {
    final l10n = AppLocalizations.of(context)!;
    final locale = Localizations.localeOf(context);
    Navigator.of(context).push<void>(
      MaterialPageRoute<void>(
        builder: (_) => LegalDocumentScreen(
          title: legalDocumentTitle(l10n, type),
          assetPath: legalDocumentAssetPath(locale, type),
        ),
      ),
    );
  }

  Future<void> _openAccountDelete() async {
    final deleted = await Navigator.of(context).push<bool>(
      MaterialPageRoute<bool>(
        builder: (_) =>
            AccountDeleteScreen(onDeleteAccount: widget.onDeleteAccount),
      ),
    );
    if (deleted != true) {
      return;
    }
    await widget.onLogout();
    if (!mounted) {
      return;
    }
    Navigator.of(context).popUntil((route) => route.isFirst);
  }

  Future<void> _confirmLogout() async {
    final l10n = AppLocalizations.of(context)!;
    final confirmed = await showDialog<bool>(
      context: context,
      builder: (dialogContext) {
        return AppModalDialog(
          title: l10n.settingsLogoutDialogTitle,
          message: l10n.settingsLogoutDialogBody,
          iconWidget: const GuaIcon(),
          actions: [
            AppModalDialogAction(
              label: l10n.settingsCancel,
              onPressed: () => Navigator.of(dialogContext).pop(false),
            ),
            AppModalDialogAction(
              label: l10n.logout,
              primary: true,
              destructive: true,
              onPressed: () => Navigator.of(dialogContext).pop(true),
            ),
          ],
        );
      },
    );
    if (confirmed != true) {
      return;
    }

    await widget.onLogout();
    if (!mounted) {
      return;
    }
    Navigator.of(context).popUntil((route) => route.isFirst);
  }
}