import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:ftrecruiter/comm/constants/color_constants.dart';
import 'package:ftrecruiter/comm/widget/alive/keep_alive_wrapper.dart';
import 'package:ftrecruiter/comm/widget/my_refresh_list.dart';
import 'package:ftrecruiter/local/theme/theme_config.dart';

//Demo列表2，使用GetX和GetBuild的功能，但是不是StatefulWidget控件 左右切换无法保存页面状态
class PageOne extends StatelessWidget {
  final controller = Get.put(PageOneController());

  Future _onRefresh() async {
    controller.setCurPage(1);
    controller.listData.clear();
    controller.loadData();
  }

  Future _loadMore() async {
    controller.setCurPage(controller.curPage++);
    await controller.loadData();
  }

  @override
  Widget build(BuildContext context) {
    return Container(
      width: double.infinity,
      height: double.infinity,
      color: ColorConstants.pageBg,
      child: GetBuilder<PageOneController>(
        builder: (controller) {
          return KeepAliveWrapper(   //使用这样布局包裹一样可以保存页面状态
            child: MyRefreshListView(
              itemCount: controller.listData.length,
              hasMore: controller.curPage < 10,
              // onRefresh: _onRefresh,  //不加就不带刷新布局
              loadMore: _loadMore,
              itemBuilder: (_, index) {
                return Container(
                  margin: const EdgeInsets.only(top: 10.0),
                  width: double.infinity,
                  height: 100,
                  color: Colors.grey,
                  child: Row(
                    children: [
                      Text("我是列表Item:$index"),
                    ],
                  ),
                );
              },
            ),
          );
        }),
    );
  }
}

class PageOneController extends GetxController {
  List<String> listData = [];
  int curPage = 1;

  @override
  void onReady() {
    super.onReady();
    loadData();
  }

  void setCurPage(page) {
    curPage = page;
    update();
  }

  Future loadData() async {
    //模拟网络请求
    Future.delayed(const Duration(seconds: 2)).then((_) {
      //此为加载结束
      listData.addAll(List.generate(10, (index) => "123"));
      update();
    }).catchError((_) {
      //此为加载失败
    });
  }
}