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

/// 收款页（对应 Android FinishOrderMoneyActivity）
/// 三种方式：微信支付（技师端唤起收款码让客户扫）/ 现金收款 / 已扫码后回调
class CollectionPage extends ConsumerStatefulWidget {
  final int orderId;
  const CollectionPage({super.key, required this.orderId});

  @override
  ConsumerState<CollectionPage> createState() => _CollectionPageState();
}

class _CollectionPageState extends ConsumerState<CollectionPage> {
  Order? _order;
  final TextEditingController _amountCtrl = TextEditingController();
  String _qrUrl = '';
  bool _loading = false;

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

  @override
  void dispose() {
    _amountCtrl.dispose();
    super.dispose();
  }

  Future<void> _load() async {
    try {
      final resp =
          await ref.read(orderApiProvider).orderDetail(widget.orderId);
      if (!mounted) return;
      if (!resp.isSuccess || resp.data == null) {
        Toast.error('订单不存在');
        return;
      }
      setState(() {
        _order = resp.data;
        _amountCtrl.text = resp.data!.amount.toStringAsFixed(2);
      });
    } catch (e) {
      Toast.error('加载失败：$e');
    }
  }

  Future<void> _wxPay() async {
    final amount = double.tryParse(_amountCtrl.text.trim());
    if (amount == null || amount <= 0) {
      Toast.error('请输入有效金额');
      return;
    }
    setState(() => _loading = true);
    EasyLoading.show(status: '生成中…');
    try {
      final BaseResponse<String> resp = await ref
          .read(orderApiProvider)
          .createPayQrCode(widget.orderId, amount);
      if (!resp.isSuccess) {
        EasyLoading.dismiss();
        Toast.error(resp.message ?? '生成失败');
        return;
      }
      setState(() => _qrUrl = resp.data ?? '');
      EasyLoading.dismiss();
    } catch (e) {
      EasyLoading.dismiss();
      Toast.error('生成失败：$e');
    } finally {
      if (mounted) setState(() => _loading = false);
    }
  }

  Future<void> _wxPayNative() async {
    final amount = double.tryParse(_amountCtrl.text.trim());
    if (amount == null || amount <= 0) {
      Toast.error('请输入有效金额');
      return;
    }
    setState(() => _loading = true);
    EasyLoading.show(status: '调起微信…');
    try {
      final BaseResponse<WxPay> resp = await ref
          .read(orderApiProvider)
          .createWxPay(widget.orderId, amount);
      EasyLoading.dismiss();
      if (!resp.isSuccess || resp.data == null) {
        Toast.error(resp.message ?? '下单失败');
        return;
      }
      final pay = resp.data!;
      await Fluwx().pay(
        which: Payment(
          appId: pay.appId,
          partnerId: pay.partnerId,
          prepayId: pay.prepayId,
          packageValue: pay.packageValue,
          nonceStr: pay.nonceStr,
          timestamp: int.tryParse(pay.timeStamp) ?? 0,
          sign: pay.sign,
        ),
      );
    } catch (e) {
      EasyLoading.dismiss();
      Toast.error('调起失败：$e');
    } finally {
      if (mounted) setState(() => _loading = false);
    }
  }

  Future<void> _cashPay() async {
    final amount = double.tryParse(_amountCtrl.text.trim());
    if (amount == null || amount <= 0) {
      Toast.error('请输入有效金额');
      return;
    }
    final ok = await showDialog<bool>(
      context: context,
      builder: (ctx) => AlertDialog(
        title: const Text('现金收款确认'),
        content: Text('确认已收到客户现金 ¥${amount.toStringAsFixed(2)}？'),
        actions: [
          TextButton(
            onPressed: () => Navigator.pop(ctx, false),
            child: const Text('取消'),
          ),
          ElevatedButton(
            onPressed: () => Navigator.pop(ctx, true),
            child: const Text('确认'),
          ),
        ],
      ),
    );
    if (ok != true) return;
    setState(() => _loading = true);
    try {
      final resp = await ref
          .read(orderApiProvider)
          .confirmCashPay(widget.orderId, amount);
      if (!resp.isSuccess) {
        Toast.error(resp.message ?? '提交失败');
        return;
      }
      Toast.success('已记录现金收款');
      if (mounted) context.pop(true);
    } catch (e) {
      Toast.error('提交失败：$e');
    } finally {
      if (mounted) setState(() => _loading = false);
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('客户付款')),
      body: _order == null
          ? const Center(child: CircularProgressIndicator())
          : Padding(
              padding: const EdgeInsets.all(16),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.stretch,
                children: [
                  Text(
                    '订单号：${_order!.orderNo}',
                    style: const TextStyle(fontSize: 13),
                  ),
                  const SizedBox(height: 16),
                  TextField(
                    controller: _amountCtrl,
                    keyboardType: const TextInputType.numberWithOptions(
                      decimal: true,
                    ),
                    decoration: const InputDecoration(
                      labelText: '收款金额',
                      prefixText: '¥ ',
                      border: OutlineInputBorder(),
                    ),
                    style: const TextStyle(
                      fontSize: 28,
                      fontWeight: FontWeight.bold,
                      color: Colors.red,
                    ),
                  ),
                  const SizedBox(height: 24),
                  if (_qrUrl.isNotEmpty) ...[
                    Center(
                      child: QrImageView(
                        data: _qrUrl,
                        size: 220,
                      ),
                    ),
                    const SizedBox(height: 8),
                    const Center(
                      child: Text(
                        '请客户扫码支付',
                        style: TextStyle(color: Colors.grey),
                      ),
                    ),
                    const SizedBox(height: 16),
                  ],
                  ElevatedButton.icon(
                    onPressed: _loading ? null : _wxPay,
                    icon: const Icon(Icons.qr_code_2),
                    label: const Text('生成收款二维码'),
                    style: ElevatedButton.styleFrom(
                      backgroundColor: Colors.green,
                      minimumSize: const Size.fromHeight(48),
                    ),
                  ),
                  const SizedBox(height: 8),
                  OutlinedButton.icon(
                    onPressed: _loading ? null : _wxPayNative,
                    icon: const Icon(Icons.wechat),
                    label: const Text('调起微信收款'),
                    style: OutlinedButton.styleFrom(
                      side: const BorderSide(color: Colors.green),
                      foregroundColor: Colors.green,
                      minimumSize: const Size.fromHeight(48),
                    ),
                  ),
                  const SizedBox(height: 8),
                  OutlinedButton.icon(
                    onPressed: _loading ? null : _cashPay,
                    icon: const Icon(Icons.money),
                    label: const Text('现金收款确认'),
                    style: OutlinedButton.styleFrom(
                      minimumSize: const Size.fromHeight(48),
                    ),
                  ),
                ],
              ),
            ),
    );
  }
}