app/lib/paegs/pay_page/pay_page.dart

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

import 'package:bbyyy/beans/alipay_result_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: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;

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

  @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 Scaffold(
      backgroundColor: Colors.white,
      body: Column(
        children: [
          MyViews().myAppBar(titles[status], context, []),
          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(order.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：${order.payTime}', MyColors.c333333, 12),
                      ),
                      Container(
                        height: 0.5,
                        color: MyColors.cE7E7E7,
                        margin: EdgeInsets.only(
                            left: 21, right: 21, top: 25, bottom: 10),
                      ),
                      Container(
                        margin: EdgeInsets.symmetric(horizontal: 21),
                        child: Row(
                          children: [
                            Container(
                              decoration: BoxDecoration(
                                color: MyColors.cFF4233,
                                borderRadius: BorderRadius.circular(2),
                              ),
                              height: 16,
                              width: 38,  alignment: Alignment.center,
                              child: MyViews().myText('收款方', Colors.white, 10),
                            ),
                            Container(
                              margin: EdgeInsets.only(left: 7,right: 5),
                              child: ClipRRect(
                                borderRadius: BorderRadius.circular(12.5),
                                child: MyViews()
                                    .netImg(imgURL(order.sellerPic), 25, 25),
                              ),
                            ),
                            MyViews().myText(
                                '${order.sellerName.length>12?order.sellerName.substring(0,12)+'...':order.buyerName}（${order.sellerUid}）',
                                MyColors.c333333,
                                14),
                          ],mainAxisAlignment: MainAxisAlignment.start,
                        ),
                      ),
                      Container(
                        margin: EdgeInsets.symmetric(horizontal: 21,vertical: 10),
                        child: Row(
                          children: [
                            Container(
                              decoration: BoxDecoration(
                                color: MyColors.cFF4233,
                                borderRadius: BorderRadius.circular(2),
                              ),
                              height: 16,
                              width: 38,
                              alignment: Alignment.center,
                              child: MyViews().myText('付款方', Colors.white, 10),
                            ),
                            Container(
                              margin: EdgeInsets.only(left: 7,right: 5),
                              child: ClipRRect(
                                borderRadius: BorderRadius.circular(12.5),
                                child: MyViews()
                                    .netImg(imgURL(order.buyerPic), 25, 25),
                              ),
                            ),
                            MyViews().myText(
                                '${order.buyerName.length>12?order.buyerName.substring(0,12)+'...':order.buyerName}（${order.buyerUid}）',
                                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 (balance.data >= widget.amount) {
          payOrder(payWayWallet, widget.orderUID, (re, hE) {
            if (!hE) {
              showToast('支付成功');
              count = 30;
              checkIfTheOrderIsPaid();
            }
          }, (e) {}, context);
        } else {
          payOrder(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);
        }
      }
    }, (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) {
          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) {});
  }
}