import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:huixiang/generated/l10n.dart';
import 'package:huixiang/view_widget/coupon_widget.dart';
import 'package:pull_to_refresh/pull_to_refresh.dart';

class MineCardInvalidPage extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return _MineCardInvalidPage();
  }
}

class _MineCardInvalidPage extends State<MineCardInvalidPage> {
  RefreshController _refreshController;

  @override
  void initState() {
    super.initState();
    _refreshController = RefreshController(initialRefresh: false);
  }

  List<String> items = ["1", "2", "3", "4", "5", "6", "7", "8"];
  void _onRefresh() async {
    // monitor network fetch
    await Future.delayed(Duration(milliseconds: 1000));
    // if failed,use refreshFailed()
    _refreshController.refreshCompleted();
  }

  void _onLoading() async {
    // monitor network fetch
    await Future.delayed(Duration(milliseconds: 1000));
    // if failed,use loadFailed(),if no data return,use LoadNodata()
    items.add((items.length + 1).toString());
    if (mounted) setState(() {});
    _refreshController.loadComplete();
    // _refreshController.loadNoData();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(
          S.of(context).shixiaoyouhuiquan,
          style: TextStyle(
            color: Colors.black,
            fontWeight: FontWeight.bold,
          ),
        ),
        centerTitle: false,
        backgroundColor: Color(0xFFF7F7F7),
        elevation: 0,
        leading: GestureDetector(
          onTap: () {
            Navigator.of(context).pop();
          },
          child: Container(
            alignment: Alignment.centerRight,
            margin: EdgeInsets.only(left: 10),
            padding: EdgeInsets.all(6),
            child: Icon(
              Icons.arrow_back_ios,
              color: Colors.black,
              size: 24,
            ),
          ),
        ),
        titleSpacing: 2,
        leadingWidth: 56,
      ),
      body: Container(
        child: SmartRefresher(
          enablePullDown: true,
          enablePullUp: true,
          header: ClassicHeader(),
          footer: CustomFooter(
            builder: (context, mode) {
              Widget body;
              if (mode == LoadStatus.idle) {
                body = Text("pull up load");
              } else if (mode == LoadStatus.loading) {
                body = CupertinoActivityIndicator();
              } else if (mode == LoadStatus.failed) {
                body = Text("Load Failed!Click retry!");
              } else if (mode == LoadStatus.canLoading) {
                body = Text("release to load more");
              } else {
                body = Text(S.of(context).meiyougengduoyouhuiquan);
              }
              return Container(
                height: 55.0,
                child: Center(child: body),
              );
            },
          ),
          controller: _refreshController,
          onRefresh: _onRefresh,
          onLoading: _onLoading,
          child: ListView.builder(
            itemBuilder: (c, i) {
              return CouponWidget(false,false,null);
            },
            itemCount: items.length,
          ),
        ),
      ),
    );
  }
}