import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import '../../core/app_colors.dart';
import '../../core/navigation_provider.dart';
import '../../providers/data_providers.dart' show adminServiceProvider;
import '../../providers/backoffice_refresh_providers.dart';
import '../../widgets/backoffice_ui.dart';
import '../../widgets/app_toast.dart';

class AdminDoctorsPage extends ConsumerStatefulWidget {
  const AdminDoctorsPage({super.key});
  @override
  ConsumerState<AdminDoctorsPage> createState() => _AdminDoctorsPageState();
}

class _AdminDoctorsPageState extends ConsumerState<AdminDoctorsPage> {
  List<Map<String, dynamic>> _doctors = [];
  bool _loading = true;
  String? _error;

  @override
  void initState() {
    super.initState();
    _load();
  }

  Future<void> _load() async {
    setState(() {
      _loading = true;
      _error = null;
    });
    try {
      final res = await ref.read(adminServiceProvider).getDoctors();
      if (!mounted) return;
      setState(() {
        if (res['code'] == 0) {
          _doctors = List<Map<String, dynamic>>.from(res['data'] ?? []);
        } else {
          _error = res['message']?.toString() ?? '医生列表加载失败';
        }
        _loading = false;
      });
    } catch (e) {
      if (mounted) {
        setState(() {
          _loading = false;
          _error = '医生列表加载失败';
        });
      }
    }
  }

  Future<void> _toggleActive(String id) async {
    try {
      await ref.read(adminServiceProvider).toggleDoctorActive(id);
      await _load();
    } catch (e) {
      if (mounted) {
        AppToast.show(context, '状态修改失败：$e', type: AppToastType.error);
      }
    }
  }

  Future<void> _delete(String id) async {
    final ok = await showDialog<bool>(
      context: context,
      builder: (ctx) => AlertDialog(
        title: const Text('确认删除'),
        content: const Text('只有没有绑定患者和问诊记录的医生才能删除；有历史数据的医生请使用“停用”。'),
        actions: [
          TextButton(
            onPressed: () => Navigator.pop(ctx, false),
            child: const Text('取消'),
          ),
          TextButton(
            onPressed: () => Navigator.pop(ctx, true),
            style: TextButton.styleFrom(foregroundColor: AppColors.error),
            child: const Text('删除'),
          ),
        ],
      ),
    );
    if (ok == true) {
      try {
        await ref.read(adminServiceProvider).deleteDoctor(id);
        await _load();
      } catch (e) {
        if (mounted) {
          AppToast.show(context, '删除失败：$e', type: AppToastType.error);
        }
      }
    }
  }

  @override
  Widget build(BuildContext context) {
    ref.listen(adminDoctorsRefreshSignalProvider, (previous, next) {
      if (previous != null && previous != next) _load();
    });
    return Scaffold(
      backgroundColor: AppColors.pageGrey,
      floatingActionButton: FloatingActionButton(
        backgroundColor: AppColors.primary,
        onPressed: () => pushRoute(ref, 'adminAddDoctor'),
        child: const Icon(Icons.add, color: Colors.white),
      ),
      body: _loading
          ? const BackofficeLoadingState(message: '正在加载医生')
          : _error != null
          ? BackofficeErrorState(message: _error!, onRetry: _load)
          : _doctors.isEmpty
          ? const BackofficeEmptyState(
              icon: Icons.medical_services_outlined,
              title: '暂无医生',
              description: '点击右下角按钮添加第一位医生',
            )
          : ListView.builder(
              padding: const EdgeInsets.all(16),
              itemCount: _doctors.length,
              itemBuilder: (_, i) {
                final d = _doctors[i];
                final active = d['isActive'] != false;
                return BackofficeSectionCard(
                  margin: const EdgeInsets.only(bottom: 10),
                  padding: const EdgeInsets.all(14),
                  child: Row(
                    children: [
                      CircleAvatar(
                        backgroundColor: active
                            ? AppColors.successLight
                            : AppColors.background,
                        child: Icon(
                          Icons.local_hospital,
                          size: 20,
                          color: active
                              ? AppColors.success
                              : AppColors.textHint,
                        ),
                      ),
                      const SizedBox(width: 12),
                      Expanded(
                        child: Column(
                          crossAxisAlignment: CrossAxisAlignment.start,
                          children: [
                            Row(
                              children: [
                                Text(
                                  d['name'] ?? '',
                                  style: const TextStyle(
                                    fontSize: 16,
                                    fontWeight: FontWeight.w600,
                                  ),
                                ),
                                const SizedBox(width: 8),
                                if (!active)
                                  Container(
                                    padding: const EdgeInsets.symmetric(
                                      horizontal: 6,
                                      vertical: 2,
                                    ),
                                    decoration: BoxDecoration(
                                      color: AppColors.errorLight,
                                      borderRadius: BorderRadius.circular(4),
                                    ),
                                    child: const Text(
                                      '已停用',
                                      style: TextStyle(
                                        fontSize: 10,
                                        color: AppColors.error,
                                      ),
                                    ),
                                  ),
                              ],
                            ),
                            const SizedBox(height: 4),
                            Text(
                              '${d['title'] ?? ''} · ${d['department'] ?? ''}',
                              style: const TextStyle(
                                fontSize: 13,
                                color: AppColors.textSecondary,
                              ),
                            ),
                            if (d['professionalDirection'] != null)
                              Text(
                                d['professionalDirection']!,
                                style: const TextStyle(
                                  fontSize: 12,
                                  color: AppColors.textHint,
                                ),
                              ),
                          ],
                        ),
                      ),
                      PopupMenuButton<String>(
                        onSelected: (v) {
                          if (v == 'edit') {
                            pushRoute(
                              ref,
                              'adminAddDoctor',
                              params: {
                                'id': d['id']?.toString() ?? '',
                                'phone': d['phone']?.toString() ?? '',
                                'name': d['name']?.toString() ?? '',
                                'title': d['title']?.toString() ?? '',
                                'department': d['department']?.toString() ?? '',
                                'direction':
                                    d['professionalDirection']?.toString() ??
                                    '',
                              },
                            );
                          }
                          if (v == 'toggle') _toggleActive(d['id']);
                          if (v == 'delete') _delete(d['id']);
                        },
                        itemBuilder: (_) => [
                          const PopupMenuItem(value: 'edit', child: Text('编辑')),
                          PopupMenuItem(
                            value: 'toggle',
                            child: Text(active ? '停用' : '启用'),
                          ),
                          const PopupMenuItem(
                            value: 'delete',
                            child: Text(
                              '删除',
                              style: TextStyle(color: AppColors.error),
                            ),
                          ),
                        ],
                      ),
                    ],
                  ),
                );
              },
            ),
    );
  }
}