import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:go_router/go_router.dart';

import '../../core/config/app_config.dart';
import '../../core/theme/app_theme.dart';
import '../../providers/auth_provider.dart';

/// 设置页（《01-开发文档》5.1 /settings）：版本信息 + 退出登录
class SettingsScreen extends ConsumerWidget {
  const SettingsScreen({super.key});

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final isLoggedIn = ref.watch(authProvider).isLoggedIn;
    return Scaffold(
      appBar: AppBar(title: const Text('设置')),
      body: ListView(
        children: [
          // 版本信息
          ListTile(
            leading: const Icon(Icons.info_outline, color: AppColors.textSecondary),
            title: const Text('当前版本'),
            trailing: Text(
              'v${AppConfig.appVersion} (${AppConfig.appVersionCode})',
              style: TextStyle(color: AppColors.textWeak, fontSize: 13),
            ),
          ),
          if (isLoggedIn) ...[
            const Divider(height: 32, indent: 16, endIndent: 16),
            ListTile(
              leading: const Icon(Icons.logout, color: AppColors.primary),
              title: const Text('退出登录',
                  style: TextStyle(color: AppColors.primary)),
              onTap: () => _confirmLogout(context, ref),
            ),
          ],
        ],
      ),
    );
  }

  Future<void> _confirmLogout(BuildContext context, WidgetRef ref) async {
    final ok = await showDialog<bool>(
      context: context,
      builder: (ctx) => AlertDialog(
        backgroundColor: AppColors.surface,
        title: const Text('退出登录', style: TextStyle(fontSize: 16)),
        content: const Text('确定退出当前账号吗？'),
        actions: [
          TextButton(
            onPressed: () => Navigator.pop(ctx, false),
            child: const Text('取消'),
          ),
          TextButton(
            onPressed: () => Navigator.pop(ctx, true),
            child: const Text('退出', style: TextStyle(color: AppColors.primary)),
          ),
        ],
      ),
    );
    if (ok == true && context.mounted) {
      await ref.read(authProvider.notifier).logout();
      if (context.mounted) context.go('/home');
    }
  }
}