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

/// 设置页
class SettingsPage extends ConsumerWidget {
  const SettingsPage({super.key});
  @override
  Widget build(BuildContext context, WidgetRef ref) => Scaffold(
    appBar: AppBar(title: const Text('设置')),
    body: ListView(children: [
      _SetItem(icon: Icons.shield, title: '隐私保护中心', onTap: () => context.push('/page/privacy')),
      _SetItem(icon: Icons.notifications, title: '通知偏好', onTap: () => context.push('/settings/notifications')),
      _SetItem(icon: Icons.text_fields, title: '字体大小', trailing: _FontSlider()),
      _SetItem(icon: Icons.article, title: '协议与公告', onTap: () => context.push('/page/terms')),
      _SetItem(icon: Icons.info, title: '关于', onTap: () => context.push('/page/about')),
      const Divider(),
      _SetItem(icon: Icons.logout, title: '退出登录', textColor: const Color(0xFFE53935), onTap: () async {
        final ok = await showDialog<bool>(context: context, builder: (ctx) => AlertDialog(
          title: const Text('退出登录'), content: const Text('确定退出？'),
          actions: [TextButton(onPressed: () => Navigator.pop(ctx, false), child: const Text('取消')), TextButton(onPressed: () => Navigator.pop(ctx, true), child: const Text('确定'))]));
        if (ok == true) { await ref.read(authProvider.notifier).logout(); if (context.mounted) context.go('/login'); }
      }),
    ]),
  );
}

class _SetItem extends StatelessWidget {
  final IconData icon; final String title; final VoidCallback? onTap; final Widget? trailing; final Color? textColor;
  const _SetItem({required this.icon, required this.title, this.onTap, this.trailing, this.textColor});
  @override
  Widget build(BuildContext context) => ListTile(leading: Icon(icon, color: const Color(0xFF666666)), title: Text(title, style: TextStyle(fontSize: 16, color: textColor)), trailing: trailing ?? const Icon(Icons.chevron_right, size: 20), onTap: onTap);
}

class _FontSlider extends StatefulWidget {
  @override State<_FontSlider> createState() => _FontSliderState();
}
class _FontSliderState extends State<_FontSlider> {
  double _value = 1.0;
  @override Widget build(BuildContext context) => SizedBox(width: 120, child: Slider(value: _value, min: 0.8, max: 1.6, divisions: 8, label: '${_value.toStringAsFixed(1)}x', onChanged: (v) => setState(() => _value = v)));
}

/// 通知偏好页
class NotificationPrefsPage extends ConsumerWidget {
  const NotificationPrefsPage({super.key});
  @override
  Widget build(BuildContext context, WidgetRef ref) => Scaffold(
    appBar: AppBar(title: const Text('通知偏好')),
    body: ListView(children: [
      _SwitchTile(icon: Icons.medication, title: '用药提醒'),
      _SwitchTile(icon: Icons.calendar_month, title: '复查提醒'),
      _SwitchTile(icon: Icons.chat, title: '医生回复'),
      _SwitchTile(icon: Icons.warning_amber, title: '异常警告'),
    ]),
  );
}

class _SwitchTile extends StatefulWidget {
  final IconData icon; final String title;
  const _SwitchTile({required this.icon, required this.title});
  @override State<_SwitchTile> createState() => _SwitchTileState();
}
class _SwitchTileState extends State<_SwitchTile> {
  bool _on = true;
  @override Widget build(BuildContext context) => SwitchListTile(secondary: Icon(widget.icon), title: Text(widget.title), value: _on, onChanged: (v) => setState(() => _on = v));
}