import 'package:flutter/foundation.dart' show defaultTargetPlatform, TargetPlatform;
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:go_router/go_router.dart';
import 'package:airhub_app/theme/design_tokens.dart';
import 'package:airhub_app/widgets/animated_gradient_background.dart';
import 'package:airhub_app/widgets/ios_toast.dart';
import 'package:airhub_app/pages/profile/settings_sub_pages.dart';
import 'package:airhub_app/pages/product_selection_page.dart';
import 'package:airhub_app/widgets/glass_dialog.dart';
import 'package:airhub_app/features/auth/presentation/controllers/auth_controller.dart';
import 'package:airhub_app/features/system/data/datasources/system_remote_data_source.dart';

class SettingsPage extends ConsumerStatefulWidget {
  const SettingsPage({super.key});

  @override
  ConsumerState<SettingsPage> createState() => _SettingsPageState();
}

class _SettingsPageState extends ConsumerState<SettingsPage> {
  bool _notificationEnabled = true;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.transparent,
      body: Stack(
        children: [
          const AnimatedGradientBackground(),
          Column(
            children: [
              _buildHeader(context),
              Expanded(
                child: SingleChildScrollView(
                  padding: EdgeInsets.only(
                    top: 20,
                    left: AppSpacing.lg,
                    right: AppSpacing.lg,
                    bottom: 40 + MediaQuery.of(context).padding.bottom,
                  ),
                  child: Column(
                    children: [
                      _buildSection('账号安全', [
                        _buildItem(
                          '📱',
                          '绑定手机',
                          value: '138****3069',
                          onTap: () => _showMessage('绑定手机', '138****3069'),
                        ),
                        _buildItem(
                          '🔐',
                          '账号密码',
                          onTap: () => _showMessage('提示', '密码修改功能开发中...'),
                        ),
                        _buildItem(
                          '📦',
                          '设备管理',
                          onTap: () => Navigator.push(
                            context,
                            MaterialPageRoute(
                              builder: (_) => const ProductSelectionPage(),
                            ),
                          ),
                        ),
                        _buildItem(
                          '🔔',
                          '推送通知权限',
                          value: _notificationEnabled ? '已开启' : '已关闭',
                          onTap: _toggleNotification,
                        ),
                      ]),
                      const SizedBox(height: 24),
                      _buildSection('关于', [
                        _buildItem(
                          '🔄',
                          '检查更新',
                          value: '当前 1.0.0',
                          onTap: _checkUpdate,
                        ),
                        _buildItem(
                          '💻',
                          '硬件信息',
                          onTap: () => _showMessage(
                            '硬件信息',
                            '设备型号: Airhub_5G\n固件版本: 2.1.3',
                          ),
                        ),
                        _buildItem(
                          '📄',
                          '用户协议',
                          onTap: () => Navigator.push(
                            context,
                            MaterialPageRoute(
                              builder: (_) => const AgreementPage(),
                            ),
                          ),
                        ),
                        _buildItem(
                          '🔒',
                          '隐私政策',
                          onTap: () => Navigator.push(
                            context,
                            MaterialPageRoute(
                              builder: (_) => const PrivacyPage(),
                            ),
                          ),
                        ),
                        _buildItem(
                          '📋',
                          '个人信息收集清单',
                          onTap: () => Navigator.push(
                            context,
                            MaterialPageRoute(
                              builder: (_) => const CollectionListPage(),
                            ),
                          ),
                        ),
                        _buildItem(
                          '🔗',
                          '第三方信息共享清单',
                          onTap: () => Navigator.push(
                            context,
                            MaterialPageRoute(
                              builder: (_) => const SharingListPage(),
                            ),
                          ),
                        ),
                      ]),
                      const SizedBox(height: 24),
                      _buildSection(null, [
                        _buildItem(
                          '🚪',
                          '退出登录',
                          isDanger: true,
                          onTap: _showLogoutDialog,
                        ),
                        _buildItem(
                          '⚠️',
                          '账号注销',
                          isDanger: true,
                          isLast: true,
                          onTap: _showDeleteAccountDialog,
                        ),
                      ]),
                      const SizedBox(height: 32),
                      const Text(
                        'Airhub v1.0.0\n© 2025 Airhub Team',
                        textAlign: TextAlign.center,
                        style: TextStyle(
                          color: AppColors.textSecondary,
                          fontSize: 13,
                        ),
                      ),
                    ],
                  ),
                ),
              ),
            ],
          ),
        ],
      ),
    );
  }

  Widget _buildHeader(BuildContext context) {
    return Container(
      padding: EdgeInsets.only(
        top: MediaQuery.of(context).padding.top + 20,
        left: AppSpacing.lg,
        right: AppSpacing.lg,
        bottom: AppSpacing.md,
      ),
      child: Row(
        children: [
          GestureDetector(
            onTap: () => Navigator.pop(context),
            child: Container(
              width: 40,
              height: 40,
              decoration: BoxDecoration(
                color: Colors.white.withOpacity(0.6),
                borderRadius: BorderRadius.circular(12),
              ),
              child: const Icon(
                Icons.arrow_back_ios_new,
                color: AppColors.textPrimary,
                size: 18,
              ),
            ),
          ),
          Expanded(
            child: Center(child: Text('设置', style: AppTextStyles.title)),
          ),
          const SizedBox(width: 40), // Balance
        ],
      ),
    );
  }

  Widget _buildSection(String? title, List<Widget> children) {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        if (title != null)
          Padding(
            padding: const EdgeInsets.only(left: 4, bottom: 8),
            child: Text(
              title,
              style: const TextStyle(
                color: AppColors.sectionTitle,
                fontSize: 13,
                fontWeight: FontWeight.w500,
              ),
            ),
          ),
        Container(
          decoration: BoxDecoration(
            color: AppColors.cardSurface,
            borderRadius: BorderRadius.circular(16),
            boxShadow: const [AppShadows.card],
          ),
          child: Column(children: children),
        ),
      ],
    );
  }

  Widget _buildItem(
    String icon,
    String text, {
    String? value,
    bool isDanger = false,
    bool isLast = false,
    VoidCallback? onTap,
  }) {
    return InkWell(
      onTap: onTap,
      child: Container(
        padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 16),
        decoration: !isLast
            ? const BoxDecoration(
                border: Border(bottom: BorderSide(color: AppColors.divider)),
              )
            : null,
        child: Row(
          children: [
            SizedBox(
              width: 24,
              child: Text(icon, style: const TextStyle(fontSize: 18)),
            ),
            const SizedBox(width: 12),
            Expanded(
              child: Text(
                text,
                style: TextStyle(
                  fontSize: 16,
                  color: isDanger ? AppColors.danger : AppColors.textPrimary,
                ),
              ),
            ),
            if (value != null) ...[
              Text(
                value,
                style: const TextStyle(
                  fontSize: 14,
                  color: AppColors.textSecondary,
                ),
              ),
              const SizedBox(width: 8),
            ],
            const Icon(
              Icons.chevron_right,
              color: AppColors.textHint,
              size: 18,
            ),
          ],
        ),
      ),
    );
  }

  void _toggleNotification() {
    setState(() => _notificationEnabled = !_notificationEnabled);
  }

  void _showMessage(String title, String desc) {
    showGlassDialog(
      context: context,
      title: title,
      description: desc,
      confirmText: '确定',
      onConfirm: () => Navigator.pop(context),
    );
  }

  Future<void> _checkUpdate() async {
    try {
      final ds = ref.read(systemRemoteDataSourceProvider);
      final platform = defaultTargetPlatform == TargetPlatform.iOS ? 'ios' : 'android';
      final result = await ds.checkVersion(platform, '1.0.0');
      if (!mounted) return;
      final needUpdate = result['need_update'] as bool? ?? false;
      if (needUpdate) {
        final latestVersion = result['latest_version'] ?? '';
        final description = result['description'] ?? '有新版本可用';
        _showMessage('发现新版本 v$latestVersion', description as String);
      } else {
        _showMessage('检查更新', '当前已是最新版本 v1.0.0');
      }
    } catch (_) {
      if (mounted) {
        AppToast.show(context, '检查更新失败，请稍后重试', isError: true);
      }
    }
  }

  void _showLogoutDialog() {
    showGlassDialog(
      context: context,
      title: '确认退出登录?',
      description: '退出后需要重新登录才能使用。',
      cancelText: '取消',
      confirmText: '退出',
      isDanger: true,
      onConfirm: () async {
        Navigator.pop(context); // Close dialog
        await ref.read(authControllerProvider.notifier).logout();
        if (mounted) context.go('/login');
      },
    );
  }

  void _showDeleteAccountDialog() {
    showGlassDialog(
      context: context,
      title: '确认注销账号?',
      description: '账号注销后所有数据将被永久删除，且无法恢复。',
      cancelText: '取消',
      confirmText: '确认注销',
      isDanger: true,
      onConfirm: () async {
        Navigator.pop(context);
        final success =
            await ref.read(authControllerProvider.notifier).deleteAccount();
        if (!mounted) return;
        if (success) {
          context.go('/login');
        } else {
          AppToast.show(context, '注销失败，请稍后重试', isError: true);
        }
      },
    );
  }
}