import 'package:autosos_flutter/model/base_response.dart';
import 'package:autosos_flutter/model/order.dart';
import 'package:autosos_flutter/provider/providers.dart';
import 'package:autosos_flutter/util/toast.dart';
import 'package:autosos_flutter/widget/multi_state_view.dart';
import 'package:flutter/material.dart';
import 'package:flutter_easyloading/flutter_easyloading.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:go_router/go_router.dart';
import 'package:intl/intl.dart';

import '../../router/app_router.dart';

/// 核单页（对应 Android CheckOrderActivity / CheckFragment）
/// 展示待核单订单，技师确认后调 /v2/order/check 进入待接单
class CheckPage extends ConsumerStatefulWidget {
  const CheckPage({super.key});

  @override
  ConsumerState<CheckPage> createState() => _CheckPageState();
}

class _CheckPageState extends ConsumerState<CheckPage> {
  MultiState _state = MultiState.loading;
  List<CheckItem> _items = [];

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

  Future<void> _load() async {
    setState(() => _state = MultiState.loading);
    try {
      final api = ref.read(orderApiProvider);
      final BaseResponse<List<CheckItem>> resp = await api.checkList();
      if (!mounted) return;
      if (!resp.isSuccess) {
        setState(() => _state = MultiState.error);
        Toast.error(resp.message ?? '加载失败');
        return;
      }
      setState(() {
        _items = resp.data ?? [];
        _state = _items.isEmpty ? MultiState.empty : MultiState.success;
      });
    } catch (e) {
      if (mounted) setState(() => _state = MultiState.error);
    }
  }

  Future<void> _submit(CheckItem item) async {
    final remark = await _showRemarkDialog();
    if (remark == null) return;
    EasyLoading.show(status: '提交中…');
    try {
      final resp = await ref.read(orderApiProvider).submitCheck(
        orderId: item.orderId,
        remark: remark,
      );
      EasyLoading.dismiss();
      if (!resp.isSuccess) {
        Toast.error(resp.message ?? '核单失败');
        return;
      }
      Toast.success('核单成功');
      setState(() => _items.removeWhere((e) => e.orderId == item.orderId));
      if (_items.isEmpty) setState(() => _state = MultiState.empty);
    } catch (e) {
      EasyLoading.dismiss();
      Toast.error('核单异常：$e');
    }
  }

  Future<String?> _showRemarkDialog() async {
    final ctrl = TextEditingController();
    return showDialog<String>(
      context: context,
      builder: (ctx) => AlertDialog(
        title: const Text('核单备注'),
        content: TextField(
          controller: ctrl,
          maxLines: 3,
          decoration: const InputDecoration(
            hintText: '请输入核单说明（可选）',
            border: OutlineInputBorder(),
          ),
        ),
        actions: [
          TextButton(
            onPressed: () => Navigator.pop(ctx),
            child: const Text('取消'),
          ),
          ElevatedButton(
            onPressed: () => Navigator.pop(ctx, ctrl.text.trim()),
            child: const Text('确认'),
          ),
        ],
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('待核单'),
        actions: [
          IconButton(icon: const Icon(Icons.refresh), onPressed: _load),
        ],
      ),
      body: RefreshIndicator(
        onRefresh: _load,
        child: MultiStateView(
          state: _state,
          onRetry: _load,
          child: ListView.separated(
            padding: const EdgeInsets.all(12),
            itemCount: _items.length,
            separatorBuilder: (_, __) => const SizedBox(height: 8),
            itemBuilder: (ctx, i) => _CheckCard(
              item: _items[i],
              onSubmit: () => _submit(_items[i]),
              onDetail: () => context.push(
                '${Routes.orderComplete}/${_items[i].orderId}',
              ),
            ),
          ),
        ),
      ),
    );
  }
}

class _CheckCard extends StatelessWidget {
  final CheckItem item;
  final VoidCallback onSubmit;
  final VoidCallback onDetail;
  const _CheckCard({
    required this.item,
    required this.onSubmit,
    required this.onDetail,
  });

  @override
  Widget build(BuildContext context) {
    final fmt = DateFormat('MM-dd HH:mm');
    return Material(
      color: Colors.white,
      borderRadius: BorderRadius.circular(8),
      child: InkWell(
        borderRadius: BorderRadius.circular(8),
        onTap: onDetail,
        child: Padding(
          padding: const EdgeInsets.all(12),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Row(
                children: [
                  Container(
                    padding: const EdgeInsets.symmetric(
                      horizontal: 8,
                      vertical: 2,
                    ),
                    decoration: BoxDecoration(
                      color: Colors.orange.shade50,
                      borderRadius: BorderRadius.circular(4),
                    ),
                    child: Text(
                      item.serviceType,
                      style: TextStyle(
                        color: Colors.orange.shade700,
                        fontSize: 12,
                      ),
                    ),
                  ),
                  const Spacer(),
                  Text(
                    '¥${item.amount.toStringAsFixed(2)}',
                    style: const TextStyle(
                      color: Colors.red,
                      fontSize: 16,
                      fontWeight: FontWeight.bold,
                    ),
                  ),
                ],
              ),
              const SizedBox(height: 8),
              Text('订单号：${item.orderNo}',
                  style: const TextStyle(fontSize: 13)),
              if (item.address != null && item.address!.isNotEmpty) ...[
                const SizedBox(height: 4),
                Text('地点：${item.address}',
                    style: TextStyle(
                        fontSize: 13, color: Colors.grey.shade700)),
              ],
              const SizedBox(height: 4),
              Text('时间：${fmt.format(item.createdAt)}',
                  style: TextStyle(fontSize: 12, color: Colors.grey.shade500)),
              const SizedBox(height: 8),
              Row(
                children: [
                  Expanded(
                    child: OutlinedButton(
                      onPressed: onDetail,
                      child: const Text('查看详情'),
                    ),
                  ),
                  const SizedBox(width: 8),
                  Expanded(
                    child: ElevatedButton(
                      onPressed: onSubmit,
                      style: ElevatedButton.styleFrom(
                        backgroundColor: Theme.of(context).primaryColor,
                      ),
                      child: const Text('确认核单'),
                    ),
                  ),
                ],
              ),
            ],
          ),
        ),
      ),
    );
  }
}