dating_touchme_app/lib/pages/home/all_timeline.dart

import 'package:dating_touchme_app/controller/home/timeline_controller.dart';
import 'package:dating_touchme_app/pages/home/timeline_item.dart';
import 'package:easy_refresh/easy_refresh.dart';
import 'package:flutter/material.dart';
import 'package:get/get.dart';

/// 推荐列表 Tab
class AllTimeline extends StatefulWidget {
  const AllTimeline({super.key});

  @override
  State<AllTimeline> createState() => _AllTimelineState();
}

class _AllTimelineState extends State<AllTimeline>
    with AutomaticKeepAliveClientMixin {
  late final TimelineController controller;
  late final EasyRefreshController _refreshController;

  @override
  void initState() {
    super.initState();
    // 确保 TimelineController 已注册
    if (!Get.isRegistered<TimelineController>()) {
      Get.put(TimelineController());
    }
    controller = Get.find<TimelineController>();
    _refreshController = EasyRefreshController(controlFinishRefresh: true, controlFinishLoad: true);
  }

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

  @override
  Widget build(BuildContext context) {
    super.build(context);
    return Obx(() {
      if (controller.recommendIsLoading.value && controller.postList.isEmpty) {
        return Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              CircularProgressIndicator(),
              SizedBox(height: 16),
              Text('加载数据中...'),
            ],
          ),
        );
      }
      return EasyRefresh(
          controller: _refreshController,
          header: const ClassicHeader(
              dragText: '下拉刷新',
              armedText: '释放刷新',
              readyText: '刷新中...',
              processingText: '刷新中...',
              processedText: '刷新完成',
              failedText: '刷新失败',
              noMoreText: '没有更多数据',
              showMessage: false
          ),
          footer: ClassicFooter(
              dragText: '上拉加载',
              armedText: '释放加载',
              readyText: '加载中...',
              processingText: '加载中...',
              processedText: '加载完成',
              failedText: '加载失败',
              noMoreText: '没有更多数据',
              showMessage: false
          ),
          // 下拉刷新
          onRefresh: () async {
            print('推荐列表下拉刷新被触发');
            try {
              controller.page.value = 1;
              controller.postList.clear();
              await controller.loadPostList();
              print( '推荐列表刷新完成, hasMore: $controller.recommendHasMore.value');
              _refreshController.finishRefresh();
              _refreshController.resetFooter();
            } catch (e) {
              print('推荐列表刷新失败: $e');
              _refreshController.finishRefresh(IndicatorResult.fail);
            }
          },
          // 上拉加载更多
          onLoad: () async {
            print('推荐列表上拉加载被触发, hasMore: $controller.recommendHasMore.value');
            try {
              controller.page.value += 1;
              await controller.loadPostList();
              // 完成加载，根据是否有更多数据决定
              if (controller.hasMore.value) {
                _refreshController.finishLoad(IndicatorResult.success);
                print('推荐列表加载更多成功');
              } else {
                _refreshController.finishLoad(IndicatorResult.noMore);
                print('推荐列表没有更多数据了');
              }
            } catch (e) {
              print('推荐列表加载更多失败: $e');
              _refreshController.finishLoad(IndicatorResult.fail);
            }
          },
          child: ListView.separated(
            // 关键：始终允许滚动，即使内容不足
            // 移除顶部 padding，让刷新指示器可以正确显示在 AppBar 下方
            padding: EdgeInsets.only(left: 12, right: 12),
            itemBuilder: (context, index) {
              // 空数据状态
              if (controller.postList.isEmpty && index == 0) {
                // 使用足够的高度确保可以滚动
                if (controller.recommendIsLoading.value) {
                  return Center(
                    child: Column(
                      mainAxisAlignment: MainAxisAlignment.center,
                      children: [
                        CircularProgressIndicator(),
                        SizedBox(height: 16),
                        Text('加载数据中...'),
                      ],
                    ),
                  );
                } else {
                  return Center(
                    child: Column(
                      mainAxisAlignment: MainAxisAlignment.center,
                      children: [
                        Text('暂无数据'),
                      ],
                    ),
                  );
                }
              }
              // 数据项
              final item = controller.postList[index];
              return TimelineItem(item: item,);
            },
            separatorBuilder: (context, index) {
              // 空状态或加载状态时不显示分隔符
              if (controller.postList.isEmpty) {
                return const SizedBox.shrink();
              }
              return const SizedBox(height: 12);
            },
            // 至少显示一个 item（用于显示加载或空状态）
            itemCount: controller.postList.length,
          )
      );
    });
  }

  @override
  bool get wantKeepAlive => true;
}