import 'package:easy_refresh/easy_refresh.dart';
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:ftrecruiter/modules/zdemo/list_item.dart';

//Demo列表3，使用StatefulWidget+GetBuilder的方式 可以保存状态了，推荐使用
class PageFour extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return _GoodsListPageState();
  }
}

class _GoodsListPageState extends State<PageFour>
    with AutomaticKeepAliveClientMixin<PageFour>, SingleTickerProviderStateMixin {
  List<String> _list = List.generate(10, (index) => "1234");
  int _page = 1;
  final int _maxPage = 10;

  //刷新控件控制器
  final EasyRefreshController _controller = EasyRefreshController(
    controlFinishRefresh: true,
    controlFinishLoad: true,
  );

  Future _onRefresh() async {
    // 设置两秒后关闭刷新，时间可以随便设置，根据项目需求，正常在请求成功后，也要关闭
    await Future.delayed(const Duration(seconds: 2), () {
      setState(() {
        _page = 1;
        _list = List.generate(10, (index) => "1234");

        // 控制器关闭刷新功能
        _controller.finishRefresh();
        _controller.resetFooter();
      });
    });
  }

  Future _loadMore() async {
    await Future.delayed(const Duration(seconds: 2), () {
      setState(() {
        _page++;
        _list.addAll(List.generate(10, (i) => "4567"));

        // 控制器关闭加载功能，还可以设置没有更多数据noMore
        _controller.finishLoad(IndicatorResult.success);
      });
    });
  }

  @override
  Widget build(BuildContext context) {
    return EasyRefresh(
      //创建的刷新控制器
      controller: _controller,

      //自定义刷新头
      // header: MaterialHeader(),

      // ClassicalHeader(
      //   enableInfiniteRefresh: false,
      //   float: false,
      //   enableHapticFeedback: false,
      //   refreshText: "pullToRefresh",
      //   refreshReadyText: "releaseToRefresh",
      //   refreshingText: "refreshing",
      //   refreshedText: "refreshed",
      //   refreshFailedText: "refreshFailed",
      //   noMoreText: "noMore",
      //   infoText: "updateAt %T",
      // ),

      //自定义刷新脚
      // footer: MaterialFooter(),

      // ClassicalFooter(
      //   enableInfiniteLoad: true,
      //   enableHapticFeedback: false,
      //   loadText: "pushToLoad",
      //   loadReadyText: "releaseToLoad",
      //   loadingText: "loading",
      //   loadedText: "loaded",
      //   loadFailedText: "loadFailed",
      //   noMoreText: "noMore",
      //   infoText: "updateAt %T",
      // ),
      // CustomFootView(),

      onRefresh: _onRefresh,
      onLoad: _loadMore,

      // childBuilder: (BuildContext context, ScrollPhysics physics) {
      //   return NestedScrollView(
      //       physics: physics,
      //       headerSliverBuilder: (context, innerBoxIsScrolled) {
      //         return [
      //           const HeaderLocator.sliver(clearExtent: false),
      //         ];
      //       },
      //       body: ListView.builder(
      //
      //         itemBuilder: (BuildContext context, int index) {
      //           //Item布局
      //           return ListTile(title: Text("$index"));
      //         },
      //       ));
      // },

      child: CustomScrollView(
        slivers: [
          SliverFixedExtentList( //或者直接用Sliver也是可以的，只是一个固定Item高度，一个不固定高度而已
            itemExtent: 100,
            delegate: SliverChildBuilderDelegate(
              (context, index) {
                return const ListItem(title: "index");
              },
              childCount: _list.length,
            ),
          ),
        ],
      ),
    );
  }

  @override
  bool get wantKeepAlive => true;
}