import 'package:PiliPlus/common/skeleton/msg_feed_top.dart';
import 'package:PiliPlus/common/widgets/dialog/dialog.dart';
import 'package:PiliPlus/common/widgets/image/network_img_layer.dart';
import 'package:PiliPlus/common/widgets/loading_widget/http_error.dart';
import 'package:PiliPlus/common/widgets/refresh_indicator.dart';
import 'package:PiliPlus/http/loading_state.dart';
import 'package:PiliPlus/models/common/image_type.dart';
import 'package:PiliPlus/models_new/fans/list.dart';
import 'package:PiliPlus/pages/fan/controller.dart';
import 'package:PiliPlus/pages/share/view.dart' show UserModel;
import 'package:PiliPlus/services/account_service.dart';
import 'package:PiliPlus/utils/grid.dart';
import 'package:PiliPlus/utils/utils.dart';
import 'package:flutter/material.dart';
import 'package:get/get.dart';

class FansPage extends StatefulWidget {
  const FansPage({
    super.key,
    this.mid,
    this.onSelect,
  });

  final int? mid;
  final ValueChanged<UserModel>? onSelect;

  @override
  State<FansPage> createState() => _FansPageState();
}

class _FansPageState extends State<FansPage> {
  late int mid;
  String? name;
  late bool isOwner;
  late FansController _fansController;

  @override
  void initState() {
    super.initState();
    AccountService accountService = Get.find<AccountService>();
    mid = widget.mid ??
        (Get.parameters['mid'] != null
            ? int.parse(Get.parameters['mid']!)
            : accountService.mid);
    isOwner = mid == accountService.mid;
    name = Get.parameters['name'] ?? accountService.name.value;
    _fansController = Get.put(FansController(mid), tag: Utils.makeHeroTag(mid));
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: widget.mid != null
          ? null
          : AppBar(title: Text(isOwner ? '我的粉丝' : '$name的粉丝')),
      body: SafeArea(
        bottom: false,
        child: refreshIndicator(
          onRefresh: _fansController.onRefresh,
          child: CustomScrollView(
            physics: const AlwaysScrollableScrollPhysics(),
            controller: _fansController.scrollController,
            slivers: [
              SliverPadding(
                padding: EdgeInsets.only(
                    bottom: MediaQuery.paddingOf(context).bottom + 80),
                sliver:
                    Obx(() => _buildBody(_fansController.loadingState.value)),
              ),
            ],
          ),
        ),
      ),
    );
  }

  Widget _buildBody(LoadingState<List<FansItemModel>?> loadingState) {
    return switch (loadingState) {
      Loading() => SliverGrid(
          gridDelegate: SliverGridDelegateWithMaxCrossAxisExtent(
            maxCrossAxisExtent: Grid.smallCardWidth * 2,
            mainAxisExtent: 66,
          ),
          delegate: SliverChildBuilderDelegate(
            (context, index) {
              return const MsgFeedTopSkeleton();
            },
            childCount: 16,
          ),
        ),
      Success(:var response) => response?.isNotEmpty == true
          ? SliverGrid(
              gridDelegate: SliverGridDelegateWithMaxCrossAxisExtent(
                maxCrossAxisExtent: Grid.smallCardWidth * 2,
                mainAxisExtent: 66,
              ),
              delegate: SliverChildBuilderDelegate(
                (BuildContext context, int index) {
                  if (index == response.length - 1) {
                    _fansController.onLoadMore();
                  }
                  final item = response[index];
                  return ListTile(
                    onTap: () {
                      if (widget.onSelect != null) {
                        widget.onSelect!(UserModel(
                          mid: item.mid!,
                          name: item.uname!,
                          avatar: item.face!,
                        ));
                        return;
                      }
                      Get.toNamed('/member?mid=${item.mid}');
                    },
                    onLongPress: widget.onSelect != null
                        ? null
                        : isOwner
                            ? () => showConfirmDialog(
                                  context: context,
                                  title: '确定移除 ${item.uname} ？',
                                  onConfirm: () => _fansController.onRemoveFan(
                                      index, item.mid!),
                                )
                            : null,
                    leading: NetworkImgLayer(
                      width: 45,
                      height: 45,
                      type: ImageType.avatar,
                      src: item.face,
                    ),
                    title: Text(
                      item.uname!,
                      style: const TextStyle(fontSize: 14),
                    ),
                    subtitle: Text(
                      item.sign ?? '',
                      maxLines: 1,
                      overflow: TextOverflow.ellipsis,
                    ),
                    dense: true,
                    trailing: const SizedBox(width: 6),
                  );
                },
                childCount: response!.length,
              ),
            )
          : HttpError(
              onReload: _fansController.onReload,
            ),
      Error(:var errMsg) => HttpError(
          errMsg: errMsg,
          onReload: _fansController.onReload,
        ),
    };
  }
}