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

/// 饮食记录列表
class DietRecordListPage extends ConsumerWidget {
  const DietRecordListPage({super.key});
  @override Widget build(BuildContext context, WidgetRef ref) {
    final service = ref.watch(dietServiceProvider);
    return Scaffold(
      appBar: AppBar(title: const Text('饮食记录')),
      body: FutureBuilder<List<Map<String, dynamic>>>(
        future: service.getRecords(),
        builder: (ctx, snap) {
          if (snap.connectionState == ConnectionState.waiting) return const Center(child: CircularProgressIndicator());
          if (!snap.hasData || snap.data!.isEmpty) return _empty(context, '饮食记录', '暂无饮食记录，可通过「拍饮食」录入');
          return ListView.builder(
            itemCount: snap.data!.length,
            itemBuilder: (ctx, i) {
              final d = snap.data![i];
              final items = (d['foodItems'] as List?)?.cast<Map<String, dynamic>>() ?? [];
              return Card(
                margin: const EdgeInsets.symmetric(horizontal: 16, vertical: 4),
                child: ListTile(
                  title: Text('${d['mealType'] ?? ''}  ${d['totalCalories'] ?? 0}千卡'),
                  subtitle: Text(items.map((f) => f['name']).join(' | ')),
                  trailing: _starWidget(d['healthScore']),
                ),
              );
            },
          );
        },
      ),
    );
  }
  Widget _starWidget(dynamic score) {
    final s = score is int ? score : 3;
    return Row(mainAxisSize: MainAxisSize.min, children: List.generate(5, (i) => Icon(Icons.star, size: 16, color: i < s ? const Color(0xFFF9A825) : Colors.grey[300])));
  }
}

/// 运动计划页
class ExercisePlanPage extends ConsumerWidget {
  const ExercisePlanPage({super.key});
  @override Widget build(BuildContext context, WidgetRef ref) {
    final plan = ref.watch(currentExercisePlanProvider);
    return Scaffold(
      appBar: AppBar(title: const Text('运动计划')),
      floatingActionButton: FloatingActionButton.extended(
        onPressed: () => _createDefaultPlan(ref),
        icon: const Icon(Icons.add),
        label: const Text('创建本周计划'),
      ),
      body: plan.when(
        data: (data) {
          if (data == null || data.isEmpty) return _empty(context, '运动计划', '暂无运动计划，点击右下角创建');
          final items = (data['items'] as List?)?.cast<Map<String, dynamic>>() ?? [];
          final weekDays = ['周一', '周二', '周三', '周四', '周五', '周六', '周日'];
          return ListView.builder(
            itemCount: items.length,
            itemBuilder: (ctx, i) {
              final item = items[i];
              final day = item['dayOfWeek'] is int ? item['dayOfWeek'] as int : i;
              final isRest = item['isRestDay'] == true;
              final isDone = item['isCompleted'] == true;
              return ListTile(
                leading: Icon(isDone ? Icons.check_circle : Icons.circle_outlined, color: isDone ? const Color(0xFF43A047) : Colors.grey),
                title: Text('${weekDays[day]}  ${isRest ? '休息日' : '${item['exerciseType']} ${item['durationMinutes']}分钟'}'),
                trailing: isDone ? null : IconButton(icon: const Icon(Icons.check, color: Color(0xFF43A047)), onPressed: () { _checkIn(ref, item['id']); }),
              );
            },
          );
        },
        loading: () => const Center(child: CircularProgressIndicator()),
        error: (_, __) => _empty(context, '运动计划', '暂无运动计划，点击右下角创建'),
      ),
    );
  }

  void _createDefaultPlan(WidgetRef ref) async {
    final service = ref.read(exerciseServiceProvider);
    final today = DateTime.now();
    final monday = today.subtract(Duration(days: today.weekday - 1));
    final items = List.generate(7, (i) => {
      'dayOfWeek': i,
      'exerciseType': i == 2 || i == 5 ? '休息' : '散步',
      'durationMinutes': i == 2 || i == 5 ? 0 : 30,
      'isRestDay': i == 2 || i == 5,
    });
    await service.createPlan({
      'weekStartDate': '${monday.year}-${monday.month.toString().padLeft(2, '0')}-${monday.day.toString().padLeft(2, '0')}',
      'items': items,
    });
    ref.invalidate(currentExercisePlanProvider);
  }

  void _checkIn(WidgetRef ref, String itemId) async {
    final service = ref.read(exerciseServiceProvider);
    await service.checkIn(itemId);
    ref.invalidate(currentExercisePlanProvider);
  }
}

/// 复查列表
class FollowUpListPage extends ConsumerWidget {
  const FollowUpListPage({super.key});
  @override Widget build(BuildContext context, WidgetRef ref) => _empty(context, '复查随访', '暂无复查安排');
}

/// 健康档案
class HealthArchivePage extends ConsumerWidget {
  const HealthArchivePage({super.key});
  @override Widget build(BuildContext context, WidgetRef ref) {
    final service = ref.watch(userServiceProvider);
    return Scaffold(
      appBar: AppBar(title: const Text('健康档案')),
      body: FutureBuilder<Map<String, dynamic>?>(
        future: service.getHealthArchive(),
        builder: (ctx, snap) {
          if (snap.connectionState == ConnectionState.waiting) return const Center(child: CircularProgressIndicator());
          final data = snap.data;
          if (data == null || data.isEmpty) return _empty(context, '暂无健康档案', '可通过 AI 对话或手动填写');
          return ListView(
            padding: const EdgeInsets.all(16),
            children: [
              _Section(title: '基本信息', children: [
                _Field('诊断', data['diagnosis']), _Field('手术类型', data['surgeryType']),
                _Field('手术日期', data['surgeryDate']),
              ]),
              _Section(title: '病史与限制', children: [
                _Field('过敏史', _listStr(data['allergies'])),
                _Field('饮食限制', _listStr(data['dietRestrictions'])),
                _Field('慢性病史', _listStr(data['chronicDiseases'])),
                _Field('家族病史', data['familyHistory']),
              ]),
            ],
          );
        },
      ),
    );
  }
  String _listStr(dynamic list) => list is List ? list.join('、') : '--';
}

class _Section extends StatelessWidget {
  final String title; final List<Widget> children;
  const _Section({required this.title, required this.children});
  @override Widget build(BuildContext context) => Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
    Padding(padding: const EdgeInsets.only(bottom: 8, top: 16), child: Text(title, style: const TextStyle(fontSize: 18, fontWeight: FontWeight.w600, color: Color(0xFF1A1A1A)))),
    ...children,
  ]);
}

class _Field extends StatelessWidget {
  final String label; final String? value;
  const _Field(this.label, this.value);
  @override Widget build(BuildContext context) => Padding(
    padding: const EdgeInsets.only(bottom: 6),
    child: Row(crossAxisAlignment: CrossAxisAlignment.start, children: [
      SizedBox(width: 80, child: Text('$label：', style: const TextStyle(fontSize: 14, color: Color(0xFF666666)))),
      Expanded(child: Text(value ?? '--', style: const TextStyle(fontSize: 14, color: Color(0xFF1A1A1A)))),
    ]),
  );
}

/// 编辑资料
class EditProfilePage extends ConsumerStatefulWidget {
  const EditProfilePage({super.key});
  @override ConsumerState<EditProfilePage> createState() => _EditProfilePageState();
}
class _EditProfilePageState extends ConsumerState<EditProfilePage> {
  final _nameCtrl = TextEditingController(); final _genderCtrl = TextEditingController(); final _birthCtrl = TextEditingController();
  @override void dispose() { _nameCtrl.dispose(); _genderCtrl.dispose(); _birthCtrl.dispose(); super.dispose(); }
  @override void initState() { super.initState(); WidgetsBinding.instance.addPostFrameCallback((_) => _load()); }
  void _load() async {
    final p = await ref.read(userServiceProvider).getProfile();
    if (p != null && mounted) {
      setState(() { _nameCtrl.text = p['name'] ?? ''; _genderCtrl.text = p['gender'] ?? ''; _birthCtrl.text = p['birthDate'] ?? ''; });
    }
  }
  Future<void> _save() async {
    await ref.read(userServiceProvider).updateProfile(name: _nameCtrl.text, gender: _genderCtrl.text, birthDate: _birthCtrl.text);
    if (mounted) Navigator.pop(context);
  }
  @override Widget build(BuildContext context) => Scaffold(
    appBar: AppBar(title: const Text('编辑资料')),
    body: ListView(padding: const EdgeInsets.all(16), children: [
      TextField(controller: _nameCtrl, decoration: const InputDecoration(labelText: '姓名')),
      const SizedBox(height: 16), TextField(controller: _genderCtrl, decoration: const InputDecoration(labelText: '性别')),
      const SizedBox(height: 16), TextField(controller: _birthCtrl, decoration: const InputDecoration(labelText: '出生日期', hintText: 'YYYY-MM-DD')),
      const SizedBox(height: 32), SizedBox(width: double.infinity, child: ElevatedButton(onPressed: _save, child: const Text('保存'))),
    ]),
  );
}

/// 健康日历
class HealthCalendarPage extends ConsumerWidget {
  const HealthCalendarPage({super.key});
  @override Widget build(BuildContext context, WidgetRef ref) => _empty(context, '健康日历', '暂无数据');
}

/// 静态文本页
class StaticTextPage extends ConsumerWidget {
  final String type;
  const StaticTextPage({super.key, required this.type});
  @override Widget build(BuildContext context, WidgetRef ref) {
    final titles = {'privacy': '隐私政策', 'terms': '服务协议', 'about': '关于'};
    return Scaffold(appBar: AppBar(title: Text(titles[type] ?? '')), body: const Center(child: Padding(padding: EdgeInsets.all(16), child: Text('内容后期填充', style: TextStyle(color: Color(0xFF999999))))));
  }
}

/// 设备管理（占位）
class DeviceManagementPage extends ConsumerWidget {
  const DeviceManagementPage({super.key});
  @override Widget build(BuildContext context, WidgetRef ref) => _empty(context, '设备管理', '暂无绑定设备');
}

Widget _empty(BuildContext context, String title, String subtitle) => Scaffold(
  appBar: AppBar(title: Text(title)),
  body: Center(child: Column(mainAxisSize: MainAxisSize.min, children: [
    Icon(Icons.inbox_outlined, size: 64, color: Colors.grey[300]),
    const SizedBox(height: 12), Text(subtitle, style: Theme.of(context).textTheme.bodyMedium),
  ])),
);