import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:ftrecruiter/comm/utils/log_utils.dart';
import 'package:ftrecruiter/comm/widget/load_state_layout.dart';
import 'package:ftrecruiter/modules/zdemo/page_four.dart';
import 'package:ftrecruiter/modules/zdemo/page_one.dart';
import 'package:ftrecruiter/modules/zdemo/page_three.dart';
import 'package:ftrecruiter/modules/zdemo/page_two.dart';

class DemoLoadPage extends StatelessWidget {
  final controller = Get.put(DemoLoadController());
  final _pageController = PageController(initialPage: 0, keepPage: true);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: const Text("测试LoadStateLayout"),
        ),
        body: GetBuilder<DemoLoadController>(builder: (controller) {
          //加载布局-封装Loading Error Empty Success状态切换
          return LoadStateLayout(
            state: controller._layoutState,
            errorRetry: () {
              controller.changeState(LoadState.State_Loading);
              controller.loadData();
            },
            //加载成功的页面-试试ViewPager的滑动效果
            successWidget: PageView(
              controller: _pageController,
              onPageChanged: (index) {
                Log.d("cur index:$index");
                // _pageController.jumpToPage(index);

                _pageController.animateToPage(index,
                    duration: const Duration(milliseconds: 16), //跳转的间隔时间
                    curve: Curves.fastOutSlowIn);
              },
              children: [
                PageOne(),
                PageTwo(),
                PageThree(),
                PageFour(),
              ],
            ),
          );
        }));
  }
}

class DemoLoadController extends GetxController {
  LoadState _layoutState = LoadState.State_Loading;

  void changeState(LoadState state) {
    _layoutState = state;
    update();
  }

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

  void loadData() {
    //模拟网络请求
    Future.delayed(const Duration(seconds: 2)).then((_) {
      //此为加载结束
      changeState(LoadState.State_Success);
      // changeState(LoadState.State_Empty);
      // changeState(LoadState.State_Error);
    }).catchError((_) {
      //此为加载失败
      changeState(LoadState.State_Error);
    });
  }
}