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/common/widgets/view_sliver_safe_area.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(
      resizeToAvoidBottomInset: false,
      appBar: widget.mid != null
          ? null
          : AppBar(title: Text(isOwner ? '我的粉丝' : '$name的粉丝')),
      body: refreshIndicator(
        onRefresh: _fansController.onRefresh,
        child: CustomScrollView(
          physics: const AlwaysScrollableScrollPhysics(),
          controller: _fansController.scrollController,
          slivers: [
            ViewSliverSafeArea(
              sliver: Obx(
                () => _buildBody(_fansController.loadingState.value),
              ),
            ),
          ],
        ),
      ),
    );
  }

  late final gridDelegate = SliverGridDelegateWithMaxCrossAxisExtent(
    maxCrossAxisExtent: Grid.smallCardWidth * 2,
    mainAxisExtent: 66,
  );

  Widget _buildBody(LoadingState<List<FansItemModel>?> loadingState) {
    return switch (loadingState) {
      Loading() => SliverGrid.builder(
        gridDelegate: gridDelegate,
        itemBuilder: (context, index) => const MsgFeedTopSkeleton(),
        itemCount: 16,
      ),
      Success(:var response) =>
        response?.isNotEmpty == true
            ? SliverGrid.builder(
                gridDelegate: gridDelegate,
                itemBuilder: (context, index) {
                  if (index == response.length - 1) {
                    _fansController.onLoadMore();
                  }
                  final item = response[index];
                  return SizedBox(
                    height: 66,
                    child: InkWell(
                      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,
                      child: Padding(
                        padding: const EdgeInsets.symmetric(
                          horizontal: 12,
                          vertical: 10,
                        ),
                        child: Row(
                          spacing: 10,
                          crossAxisAlignment: CrossAxisAlignment.start,
                          children: [
                            NetworkImgLayer(
                              width: 45,
                              height: 45,
                              type: ImageType.avatar,
                              src: item.face,
                            ),
                            Column(
                              spacing: 5,
                              children: [
                                Text(
                                  item.uname!,
                                  style: const TextStyle(fontSize: 14),
                                ),
                                Text(
                                  item.sign ?? '',
                                  maxLines: 1,
                                  overflow: TextOverflow.ellipsis,
                                ),
                              ],
                            ),
                          ],
                        ),
                      ),
                    ),
                  );
                },
                itemCount: response!.length,
              )
            : HttpError(onReload: _fansController.onReload),
      Error(:var errMsg) => HttpError(
        errMsg: errMsg,
        onReload: _fansController.onReload,
      ),
    };
  }
}