import 'package:flutter/material.dart';
import 'package:flutter_easyrefresh/easy_refresh.dart';
import 'package:flutter_screenutil/screenutil.dart';
import 'package:one_key/constant/state.dart';
import 'package:one_key/pages/coupon/coupon_item.dart';
import 'package:one_key/provider/coupon_provider.dart';
import 'package:one_key/provider/user_model.dart';
import 'package:one_key/res/colors.dart';
import 'package:one_key/utils/event_bus.dart';
import 'package:one_key/utils/navigator_util.dart';
import 'package:one_key/widgets/page_exception.dart';
import 'package:one_key/widgets/round_button.dart';
import 'package:one_key/widgets/system_app_bar.dart';
import 'package:one_key/widgets/v_empty_view.dart';
import 'package:provider/provider.dart';

/**
 * 优惠券列表
 */

class CouponPage extends StatefulWidget {
  CouponPage({Key key}) : super(key: key);

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

class _CouponPageState extends State<CouponPage> {
  EasyRefreshController _controller = EasyRefreshController();
  CouponProvider couponProvider;

  ///获取优惠券列表数据
  _couponNetworkData({bool isShowLoading = true}) async {
    Map<String, String> params = {
      "uid": Provider.of<UserModel>(context, listen: false).user.openid,
      // 'is_time': '0'
    };
    await couponProvider.getCustomerActivity(context, params,
        isShowLoading: isShowLoading);
  }

  ///修改活动信息
  _setCustomerActivity(int index) async {
    Map<String, String> params = {
      "id": couponProvider.couponList[index].id,
      "status": couponProvider.couponList[index].isOpenBool ? '1' : '0'
    };
    bool isSuccess = await couponProvider.setCustomerActivity(context, params,
        isShowLoading: false);
    print(isSuccess);
    _couponNetworkData(isShowLoading: false);
    // if (isSuccess) {
    //   couponProvider.notifyListeners();
    // } else {
    //   couponProvider.couponList[index].isOpenBool =
    //       !couponProvider.couponList[index].isOpenBool;
    //   couponProvider.notifyListeners();
    // }
  }

  @override
  void initState() {
    // TODO: implement initState
    super.initState();
    WidgetsBinding.instance.addPostFrameCallback((_) {
      _couponNetworkData();
    });
    // bus.on("refresh_coupon_list", (arg) {
    //   _couponNetworkData();
    // });
  }

  @override
  void dispose() {
    EventBus().emit('changeStatusColor');
    // bus.off("refresh_coupon_list");
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    couponProvider = Provider.of<CouponProvider>(context, listen: true);
    return Scaffold(
        appBar: SystemAppBar('线上券', rightImgName: '历史券', onTap: () {
          EventBus().emit('changeStatusColor');
          Navigator.of(context).pop();
        }, onTapRight: () {
          NavigatorUtil.goCouponHistoryPage(context);
        }),
        body: Column(
          children: [
            Expanded(child: Consumer<CouponProvider>(
              builder: (context, model, _) {
                if (model.pageState != PageState.Success) {
                  return ExceptionPage(
                    pageState: model.pageState,
                    callback: () {
                      // offset = 0;
                      // getMessage(showLoading: true);
                      _couponNetworkData();
                    },
                    emptyMsg: "暂时没有列表信息哦",
                    emptyImg: "empty_search",
                    showMsg: "加载中，请稍后...",
                  );
                } else {
                  return EasyRefresh.custom(
                    controller: _controller,
                    shrinkWrap: true,
                    slivers: [
                      SliverList(
                        delegate: SliverChildBuilderDelegate(
                            (BuildContext context, int index) {
                          return Container(
                              padding:
                                  EdgeInsets.all(ScreenUtil().setWidth(20)),
                              child: Text(
                                '使用说明：需在结账前出示优惠券二维码，店内工作人员微信扫码核销。超过有效期的券，会自动作废并移出列表。优惠券不可找零、兑现。',
                                style: TextStyle(
                                  color: MyColours.color_333333,
                                  fontSize: ScreenUtil().setSp(28),
                                ),
                                strutStyle: StrutStyle(
                                    forceStrutHeight: true,
                                    height: 1,
                                    leading: 0.3),
                              ));
                        }, childCount: 1),
                      ),
                      SliverList(
                        delegate: SliverChildBuilderDelegate(
                            (BuildContext context, int index) {
                          return CouponItem(
                            from: 'quan',
                            couponSonModel: couponProvider.couponList[index],
                            showBtn: true,
                            onPressedSwich: () {
                              couponProvider.couponList[index].isOpenBool =
                                  !couponProvider.couponList[index].isOpenBool;
                              _setCustomerActivity(index);
                            },
                            onPressed: () {
                              NavigatorUtil.goCouponDetailPage(
                                  context, couponProvider.couponList[index]);
                            },
                          );
                        }, childCount: couponProvider.couponList.length),
                      )
                    ],
                    // onRefresh: () async {
                    //   // offset = 0;
                    //   // getMessage(showLoading: false);
                    // },
                    // onLoad: () async {
                    //   // offset++;
                    //   // getMessage(showLoading: false);
                    // },
                  );
                }
              },
            )),
            VEmptyView(20),
            Padding(
                padding: EdgeInsets.fromLTRB(ScreenUtil().setWidth(40), 0,
                    ScreenUtil().setWidth(40), ScreenUtil().setWidth(40)),
                child: RoundButton(
                  onPressed: () async {
                    bool needRefresh =
                        await NavigatorUtil.goCouponEditPage(context);
                    print(needRefresh);
                    if (needRefresh != null && needRefresh) {
                      //刷新页面数据
                      // _controller.callRefresh();
                      _couponNetworkData();
                    }
                  },
                  text: '创建新券',
                  fontSize: 34,
                  isBold: false,
                  height: ScreenUtil().setWidth(80),
                  width: double.infinity,
                  radius: ScreenUtil().setWidth(10),
                ))
          ],
        ));
  }
}