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/utils/utils.dart';
import 'package:one_key/widgets/h_empty_view.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';

class CouponSelectPage extends StatefulWidget {
  final String rid;
  final bool hasModify;
  CouponSelectPage({Key key, this.rid, this.hasModify}) : super(key: key);

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

class _CouponSelectPageState extends State<CouponSelectPage> {
  EasyRefreshController _controller = EasyRefreshController();
  CouponProvider couponProvider;

  ///获取优惠券列表数据(status == 1)

  _couponNetworkData({bool isShowLoading = true}) async {
    Map<String, String> params = {
      "uid": Provider.of<UserModel>(context, listen: false).user.openid,
    };
    if (!widget.hasModify) {
      params['status'] = '1';
    }
    await couponProvider.getCustomerSelectActivity(context, params,
        isShowLoading: isShowLoading);
  }

  @override
  void initState() {
    // TODO: implement initState
    super.initState();
    WidgetsBinding.instance.addPostFrameCallback((_) {
      // if (!couponProvider.hasModify) {
      _couponNetworkData();
      // } else {
      //   couponProvider.pageStateSelect = PageState.Success;
      //   // couponProvider.notifyListeners();
      // }
    });
  }

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

  @override
  Widget build(BuildContext context) {
    couponProvider = Provider.of<CouponProvider>(context, listen: true);
    return Scaffold(
      appBar: AppBar(
        elevation: 0,
        leading: InkWell(
          onTap: () {
            Navigator.pop(context);
            Utils.changeStatusColor(color: Colors.transparent);
          },
          child: Padding(
              padding: EdgeInsets.symmetric(
                  horizontal: ScreenUtil().setWidth(40),
                  vertical: ScreenUtil().setWidth(15)),
              child: Row(
                children: <Widget>[
                  Image.asset(
                    "assets/icon_back.png",
                    width: ScreenUtil().setWidth(20),
                    height: ScreenUtil().setWidth(31),
                  )
                ],
              )),
        ),
        title: Text(
          '优惠券',
          style: TextStyle(
              color: MyColours.color_353535,
              fontSize: ScreenUtil().setSp(34),
              decoration: TextDecoration.none),
        ),
        actions: <Widget>[
          !widget.hasModify &&
                  couponProvider.pageStateSelect == PageState.Success
              ? InkWell(
                  onTap: () {
                    if (couponProvider.checkValue) {
                      couponProvider.cancelAll();
                    } else {
                      couponProvider.addAll();
                    }
                  },
                  child: Padding(
                      padding:
                          EdgeInsets.only(right: ScreenUtil().setWidth(40)),
                      child: Row(children: [
                        Container(
                            // color: Colors.red,
                            alignment: Alignment.center,
                            child: Text(
                              '全选',
                              style: TextStyle(
                                  color: MyColours.color_199095,
                                  fontSize: ScreenUtil().setSp(34)),
                            )),
                        HEmptyView(20),
                        Image.asset(
                            Utils.getImgPath(couponProvider.checkValue
                                ? 'check_g'
                                : 'check_un'),
                            width: ScreenUtil().setWidth(40))
                      ])))
              : Container()
        ],
        centerTitle: true, // 标题居中
      ),
      body: WillPopScope(
        child: Column(
          children: [
            Expanded(child: Consumer<CouponProvider>(
              builder: (context, model, _) {
                if (model.pageStateSelect != PageState.Success) {
                  return ExceptionPage(
                    pageState: model.pageStateSelect,
                    callback: () {
                      // offset = 0;
                      // getMessage(showLoading: true);
                    },
                    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 VEmptyView(40);
                        }, childCount: 1),
                      ),
                      SliverList(
                        delegate: SliverChildBuilderDelegate(
                            (BuildContext context, int index) {
                          return InkWell(
                              onTap: () {
                                couponProvider.couponListSelect[index].isCheck =
                                    !couponProvider
                                        .couponListSelect[index].isCheck;
                                if (couponProvider
                                    .couponListSelect[index].isCheck) {
                                  couponProvider.addData(index);
                                } else {
                                  couponProvider.cancelData(index);
                                }
                                couponProvider.getCheckValue();
                              },
                              // child: Row(
                              //   children: [
                              //     HEmptyView(30),
                              //     !widget.hasModify
                              //         ? Checkbox(
                              //             value: couponProvider
                              //                 .couponListSelect[index].isCheck,
                              //             checkColor: MyColours.color_ffffff,
                              //             activeColor: MyColours.app_main,
                              //             onChanged: (bool value) {},
                              //           )
                              //         : Container(),
                              // Image.asset(
                              //     couponProvider.listData[index]['checked']
                              //         ? 'assets/select.png'
                              //         : 'assets/unselect.png',
                              //     width: ScreenUtil().setWidth(44)),
                              child: CouponItem(
                                  from: 'select',
                                  showCheck: !widget.hasModify,
                                  couponSonModel:
                                      couponProvider.couponListSelect[index],
                                  onPressed: () {
                                    //改这里 ******8
                                    if (!widget.hasModify) {
                                      couponProvider
                                              .couponListSelect[index].isCheck =
                                          !couponProvider
                                              .couponListSelect[index].isCheck;
                                      if (couponProvider
                                          .couponListSelect[index].isCheck) {
                                        couponProvider.addData(index);
                                      } else {
                                        couponProvider.cancelData(index);
                                      }
                                      couponProvider.getCheckValue();
                                    }
                                  }));
                        }, childCount: couponProvider.couponListSelect.length),
                      )
                    ],
                    // onRefresh: () async {
                    //   // offset = 0;
                    //   // getMessage(showLoading: false);
                    // },
                    // onLoad: () async {
                    //   // offset++;
                    //   // getMessage(showLoading: false);
                    // },
                  );
                }
              },
            )),
            VEmptyView(20),
            !widget.hasModify &&
                    couponProvider.pageStateSelect == PageState.Success
                ? Padding(
                    padding: EdgeInsets.fromLTRB(ScreenUtil().setWidth(40), 0,
                        ScreenUtil().setWidth(40), ScreenUtil().setWidth(40)),
                    child: RoundButton(
                      onPressed: () async {
                        Navigator.pop(context);
                      },
                      text: '已选${couponProvider.coupons.length}个 确定',
                      fontSize: 34,
                      isBold: false,
                      height: ScreenUtil().setWidth(80),
                      width: double.infinity,
                      radius: ScreenUtil().setWidth(10),
                    ))
                : Container()
          ],
        ),
        onWillPop: () async {
          Utils.changeStatusColor(color: Colors.transparent);
          Navigator.of(context).pop();
          return true;
        },
      ),
    );
  }
}