import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:pull_to_refresh/pull_to_refresh.dart';
import 'package:dating_touchme_app/controller/home/home_controller.dart';
import 'package:dating_touchme_app/model/home/marriage_data.dart';
import 'package:dating_touchme_app/pages/home/content_card.dart';

/// 同城列表 Tab
class NearbyTab extends StatefulWidget {
  const NearbyTab({super.key});

  @override
  State<NearbyTab> createState() => _NearbyTabState();
}

class _NearbyTabState extends State<NearbyTab>
    with AutomaticKeepAliveClientMixin {
  final HomeController controller = Get.find<HomeController>();
  late final RefreshController _refreshController;

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

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

  @override
  Widget build(BuildContext context) {
    super.build(context);
    // 获取底部安全区域高度和 tabbar 高度（约64）
    final bottomPadding = MediaQuery.of(context).padding.bottom;
    final tabBarHeight = 64.0;
    final totalBottomPadding = bottomPadding + tabBarHeight;

    return SizedBox(
      height: MediaQuery.of(context).size.height - totalBottomPadding,
      child: Obx(() {
      final List<MarriageData> dataSource = controller.nearbyFeed;

      return SmartRefresher(
        controller: _refreshController,
        enablePullDown: true,
        enablePullUp: true,
        header: const ClassicHeader(
          refreshingText: '正在刷新...',
          completeText: '刷新完成',
          idleText: '下拉刷新',
          releaseText: '释放刷新',
        ),
        footer: ClassicFooter(
          idleText: '上拉加载',
          loadingText: '正在加载...',
          noDataText: '没有更多数据',
          canLoadingText: '释放加载',
        ),
        // 下拉刷新
        onRefresh: () async {
          print('同城列表下拉刷新被触发');
          try {
            await controller.refreshNearbyData();
            _refreshController.refreshCompleted();
            _refreshController.loadComplete();
            print('同城列表刷新完成');
          } catch (e) {
            print('同城列表刷新失败: $e');
            _refreshController.refreshFailed();
          }
        },
        // 上拉加载更多
        onLoading: () async {
          print('同城列表上拉加载被触发, hasMore: ${controller.nearbyHasMore.value}');
          if (controller.nearbyHasMore.value) {
            try {
              await controller.loadNearbyMoreData();
              // 完成加载，根据是否有更多数据决定
              if (controller.nearbyHasMore.value) {
                _refreshController.loadComplete();
                print('同城列表加载更多成功');
              } else {
                _refreshController.loadNoData();
                print('同城列表没有更多数据了');
              }
            } catch (e) {
              print('同城列表加载更多失败: $e');
              _refreshController.loadFailed();
            }
          } else {
            _refreshController.loadNoData();
            print('同城列表没有更多数据');
          }
        },
        child: ListView.separated(
          // 关键：始终允许滚动，即使内容不足
          physics: const AlwaysScrollableScrollPhysics(
            parent: BouncingScrollPhysics(),
          ),
          // 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,
            bottom: 12,
          ),
          itemBuilder: (context, index) {
            // 空数据状态
            if (dataSource.isEmpty && index == 0) {
              // 使用足够的高度确保可以滚动
              return SizedBox(
                height: MediaQuery.of(context).size.height - totalBottomPadding,
                child: const Center(
                  child: Text(
                    "暂无数据",
                    style: TextStyle(fontSize: 14, color: Color(0xFF999999)),
                  ),
                ),
              );
            }
            // 数据项
            final item = dataSource[index];
            return ContentCard(item: item);
          },
          separatorBuilder: (context, index) {
            // 空状态或加载状态时不显示分隔符
            if (dataSource.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: dataSource.isEmpty ? 1 : dataSource.length,
        ),
      );
    }));
  }

  @override
  bool get wantKeepAlive => true;
}