app/lib/paegs/pay_page/pay_page.dart

import 'dart:async';
import 'dart:convert';
import 'dart:io';
import 'dart:math' as math;

import 'package:bbyyy/beans/alipay_result_bean_entity.dart';
import 'package:bbyyy/beans/my_coupon_bean_entity.dart';
import 'package:bbyyy/beans/pay_by_alipay_bean_entity.dart';
import 'package:bbyyy/beans/smart_order_bean_entity.dart';
import 'package:bbyyy/beans/user_balance_entity.dart';
import 'package:bbyyy/https/MyDio.dart';
import 'package:bbyyy/https/my_request.dart';
import 'package:bbyyy/https/url.dart';
import 'package:bbyyy/my_tools/const.dart';
import 'package:bbyyy/my_tools/dims.dart';
import 'package:bbyyy/my_tools/easy_loading/easy_loading.dart';
import 'package:bbyyy/my_tools/event_bus.dart';
import 'package:bbyyy/my_tools/my_colors.dart';
import 'package:bbyyy/my_tools/my_tools.dart';
import 'package:bbyyy/my_tools/my_views.dart';
import 'package:bbyyy/pay/pay_tools.dart';
import 'package:flustars/flustars.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_svg/flutter_svg.dart';
import 'package:tobias/tobias.dart';

class PayPage extends StatefulWidget {
  int orderUID;
  bool cancelOrder;
  double amount;
  int payWay;
  MyCouponBeanDataData couponData;

  PayPage(this.orderUID, this.cancelOrder, this.amount, this.payWay,
      this.couponData);

  @override
  _PayPageState createState() => _PayPageState();
}

class _PayPageState extends State<PayPage> with WidgetsBindingObserver {
  var titles = ['正在支付', '支付成功', '支付失败'];
  var icons = ['images/svg/等待.svg', 'images/svg/成功.svg', 'images/svg/失败.svg'];
  var content = ['正在支付，请稍后…', '支付成功，即将自动跳转…', '支付失败'];
  int status = 0;
  SmartOrderBeanDataData order;

  @override
  void initState() {
    super.initState();
    WidgetsBinding.instance.addObserver(this);
    Future.delayed(Duration(seconds: 1), () {
      pay();
    });
  }

  @override
  Widget build(BuildContext context) {
    return WillPopScope(
      onWillPop: () {
        Navigator.pop(context,status);
      return  Future.value(false);
      },
      child: Scaffold(
        backgroundColor: Colors.white,
        body: Column(
          children: [
            Container(
              color: Colors.white,
              child: SafeArea(
                bottom: false,
                child: Container(
                  height: 45,
                  width: double.infinity,
                  color: Colors.white,
                  child: Stack(
                    children: [
                      Text(
                        titles[status],
                        style: TextStyle(color: MyColors.c333333, fontSize: 16),
                      ),
                      Positioned(
                        left: 0,
                        child: GestureDetector(
                          onTap: () {
                            Navigator.pop(context,status);
                          },
                          behavior: HitTestBehavior.translucent,
                          child: Transform.rotate(
                            angle: math.pi,
                            child: Padding(
                              padding: EdgeInsets.only(
                                  left: 16, right: 16, top: 8, bottom: 8),
                              child: SvgPicture.asset(
                                'images/svg/箭头.svg',
                                color: MyColors.c333333,
                                height: 14,
                              ),
                            ),
                          ),
                        ),
                      ),
                    ],
                    alignment: Alignment.center,
                  ),
                ),
              ),
            ),
            Container(
              height: 10,
              color: MyColors.cF7F7F7,
            ),
            Expanded(
              child: status == 1
                  ? Column(
                      children: [
                        Container(
                          child: Text(
                            '支付金额',
                            style: TextStyle(
                                color: MyColors.c333333,
                                fontSize: 16,
                                fontWeight: FontWeight.bold),
                          ),
                          margin: EdgeInsets.only(top: 25, bottom: 5),
                        ),
                        Text(
                          widget.couponData == null
                              ? order.amount.toStringAsFixed(2)
                              : NumUtil.subtract(
                                      order.amount, widget.couponData.amount)<0?0.0
                                  .toStringAsFixed(2):NumUtil.subtract(
                              order.amount, widget.couponData.amount).toStringAsFixed(2),
                          style: TextStyle(
                              color: MyColors.c333333,
                              fontSize: 26,
                              fontWeight: FontWeight.bold),
                        ),
                        Container(
                          margin: EdgeInsets.only(
                            top: 5,
                          ),
                          child: MyViews().myText(
                              '支付时间：${order.payTime}', MyColors.c333333, 12),
                        ),
                        Container(
                          height: 0.5,
                          color: MyColors.cE7E7E7,
                          margin: EdgeInsets.only(
                              left: 21, right: 21, top: 25, bottom: 10),
                        ),
                        Container(
                          margin: EdgeInsets.symmetric(horizontal: 21),
                          child: Row(
                            children: [
                              Container(
                                decoration: BoxDecoration(
                                  color: MyColors.cFF4233,
                                  borderRadius: BorderRadius.circular(2),
                                ),
                                height: 16,
                                width: 38,
                                alignment: Alignment.center,
                                child: MyViews().myText('收款方', Colors.white, 10),
                              ),
                              Container(
                                margin: EdgeInsets.only(left: 7, right: 5),
                                child: ClipRRect(
                                  borderRadius: BorderRadius.circular(12.5),
                                  child: order.sellerUid == 0
                                      ? Image.asset(
                                          'images/app_logo.png',
                                          height: 25,
                                          width: 25,
                                        )
                                      : MyViews().netImg(
                                          imgURL(order.sellerPic), 25, 25),
                                ),
                              ),
                              MyViews().myText(
                                  order.sellerUid == 0
                                      ? '平台'
                                      : '${order.sellerName.length > 12 ? order.sellerName.substring(0, 12) + '...' : order.sellerName}（${order.sellerUid}）',
                                  MyColors.c333333,
                                  14),
                            ],
                            mainAxisAlignment: MainAxisAlignment.start,
                          ),
                        ),
                        Container(
                          margin:
                              EdgeInsets.symmetric(horizontal: 21, vertical: 10),
                          child: Row(
                            children: [
                              Container(
                                decoration: BoxDecoration(
                                  color: MyColors.cFF4233,
                                  borderRadius: BorderRadius.circular(2),
                                ),
                                height: 16,
                                width: 38,
                                alignment: Alignment.center,
                                child: MyViews().myText('付款方', Colors.white, 10),
                              ),
                              Container(
                                margin: EdgeInsets.only(left: 7, right: 5),
                                child: ClipRRect(
                                  borderRadius: BorderRadius.circular(12.5),
                                  child: MyViews()
                                      .netImg(imgURL(order.payerPic), 25, 25),
                                ),
                              ),
                              MyViews().myText(
                                  '${order.payerName.length > 12 ? order.payerName.substring(0, 12) + '...' : order.payerName}（${order.payerUid}）',
                                  MyColors.c333333,
                                  14),
                            ],
                            mainAxisAlignment: MainAxisAlignment.start,
                          ),
                        )
                      ],
                    )
                  : Center(
                      child: Column(
                        children: [
                          Expanded(
                            child: Column(
                              children: [
                                SvgPicture.asset(
                                  icons[status],
                                  height: 94,
                                  width: 94,
                                ),
                                Container(
                                  margin: EdgeInsets.only(top: 30),
                                  child: Text(
                                    content[status],
                                    style: TextStyle(
                                        color: MyColors.c666666, fontSize: 15),
                                  ),
                                ),
                              ],
                              mainAxisAlignment: MainAxisAlignment.center,
                            ),
                          ),
                          Expanded(child: Container()),
                        ],
                      ),
                    ),
            ),
          ],
        ),
      ),
    );
  }

  pay() {
    getUserWalletBalance((re, hE) {
      if (!hE) {
        UserBalanceEntity balance =
            UserBalanceEntity().fromJson(json.decode(re.data.toString()));
        if (widget.payWay == payWayWallet) {
          if (balance.data >= widget.amount) {
            payWithWallet();
          } else {
            if(widget.couponData!=null){
              if(balance.data+widget.couponData.amount>=widget.amount){
                payWithWallet();
              }else{
                showToast('积分不足，请选择其他支付方式');
                status = 2;
                setState(() {});
              }
            }else{
              showToast('积分不足，请选择其他支付方式');
              status = 2;
              setState(() {});
            }
          }
        } else if (widget.payWay == payWayAliPay) {
          payWithAliPay();
        }
      }
    }, (e) {}, context);
  }

  @override
  void didChangeAppLifecycleState(AppLifecycleState state) {
    super.didChangeAppLifecycleState(state);
    if (state == AppLifecycleState.paused) {
      print('AlipayPage went to Background');
      count = 0;
      status = 0;
      setState(() {});
    }
    if (state == AppLifecycleState.resumed) {
      print('AlipayPage came back to Foreground');
      if (Platform.isIOS) {
        count = 10;
        checkIfTheOrderIsPaid();
      }
    }
  }

  int count = 0;

  void checkIfTheOrderIsPaid() {
    MyDio().query({
      "key": "order",
      "filters": {
        "conditions": ["uid == ${widget.orderUID}"]
      },
      "dims": orderDims,
      "paging": [1, 1]
    }, (response, hasError) {
      if (!hasError) {
        SmartOrderBeanEntity entity = SmartOrderBeanEntity()
            .fromJson(json.decode(response.data.toString()));
        if (entity.data.data[0].state == orderStatePaid ||
            entity.data.data[0].state == orderStateOtherPaid) {
          order = entity.data.data[0];
          status = 1;
          setState(() {});
          // Timer(Duration(seconds: 1), () {
          //   Navigator.pop(context, '支付成功');
          // });
        } else {
          if (count != 0) {
            Timer(Duration(seconds: 1), () {
              count--;
              checkIfTheOrderIsPaid();
            });
          } else {
            count = 10;
            status = 2;
            if (widget.cancelOrder) {
              revokePayOrder(widget.orderUID);
            } else {
              resetOrder(widget.orderUID);
            }
            setState(() {});
          }
        }
      }
    }, (error) {});
  }

  void payWithWallet() {
    payOrder(widget.couponData,payWayWallet, widget.orderUID, (re, hE) {
      if (!hE) {
        showToast('支付成功');
        count = 30;
        checkIfTheOrderIsPaid();
      }
    }, (e) {}, context);
  }

  void payWithAliPay() {
    payOrder(widget.couponData,payWayAliPay, widget.orderUID, (re, hE) {
      if (!hE) {
        PayByAlipayBeanEntity entity =
            PayByAlipayBeanEntity().fromJson(json.decode(re.data.toString()));
        EventBus().on('alipayPaymentCallback', (arg) {
          EventBus().off('alipayPaymentCallback');
          EasyLoading.dismiss();
          showToast('支付成功');
          EventBus().emit('reNoPayOrder');
          // Navigator.pop(context);
          count = 30;
          checkIfTheOrderIsPaid();
        });
        print(entity.data);
        EasyLoading.instance
          ..contentPadding = EdgeInsets.symmetric(horizontal: 20, vertical: 12)
          ..alignment = Alignment.center
          ..loadingStyle = EasyLoadingStyle.light
          ..contentMargin = EdgeInsets.all(20);
        aliPay(entity.data).then((value) {
          print(json.encode(value));
          AlipayResultBeanEntity e = AlipayResultBeanEntity()
              .fromJson(json.decode(json.encode(value)));
          try {
            int r = int.parse(e.resultStatus);
            if (r == 9000) {
              count = 30;
              showToast('支付成功');
              checkIfTheOrderIsPaid();
            } else {
              showToast(aliPayResultStatus(r));
              if (widget.cancelOrder) {
                revokePayOrder(widget.orderUID);
              } else {
                resetOrder(widget.orderUID);
              }
              setState(() {
                status = 2;
              });
            }
          } catch (e) {
            EasyLoading.dismiss();
          }
        });
      }
    }, (e) {}, context);
  }
}