import 'package:easy_refresh/easy_refresh.dart';
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:loopin/IM/im_service.dart';
import 'package:loopin/pages/groupChat/controller/group_detail_controller.dart';
import 'package:loopin/styles/index.dart';
import 'package:tencent_cloud_chat_sdk/enum/group_member_filter_enum.dart';
import 'package:tencent_cloud_chat_sdk/models/v2_tim_group_member_full_info.dart';
import 'package:tencent_cloud_chat_sdk/models/v2_tim_group_member_search_param.dart';

class MemberActionSheet extends StatefulWidget {
  final String groupID;
  final Function(List<String> selected) onAction;
  final String title;
  final String actionLabel;
  final bool showButton;
  final bool showSelf;

  const MemberActionSheet({
    super.key,
    required this.groupID,
    required this.onAction,
    this.title = "",
    this.actionLabel = "确认",
    this.showButton = true,
    this.showSelf = false,
  });

  @override
  State<MemberActionSheet> createState() => _MemberActionSheetState();
}

class _MemberActionSheetState extends State<MemberActionSheet> {
  String _query = "";
  final Set<String> _selectedIDs = {}; // 选中的 userID 集合
  late List<V2TimGroupMemberFullInfo> members = [];
  late List<V2TimGroupMemberFullInfo> searchMemberList = [];
  String nextSeq = '0';
  String searchCursor = '';
  bool hasMore = false; // 普通列表用
  bool loading = false;
  bool isFinished = false; // 搜索列表用
  bool loading2 = false; //搜索

  //
  @override
  void initState() {
    super.initState();
    if (widget.showSelf) {
      final self = Get.find<GroupDetailController>().selfInfo.value!;
      members.insert(0, self);
    }
    getMemberData();
  }

  //群成员
  Future<void> getMemberData() async {
    if (loading) return;
    loading = true;
    final res = await ImService.instance.getGroupMemberList(
      groupID: widget.groupID,
      filter: GroupMemberFilterTypeEnum.V2TIM_GROUP_MEMBER_FILTER_COMMON,
      nextSeq: nextSeq,
      count: 100,
    );
    if (res.success && res.data != null) {
      logger.e(res.data!.nextSeq);
      nextSeq = res.data!.nextSeq ?? '0';
      final mem = res.data!.memberInfoList ?? [];
      setState(() {
        members.addAll(mem);
        hasMore = res.data!.nextSeq == '0' ? false : true;
        loading = false;
      });
    }
  }

  ///搜索群成员
  Future<void> searchMember({bool loadMore = false}) async {
    if (loading2) return;
    if (_query.isEmpty) {
      setState(() {
        _query = '';
      });
      return;
    }
    loading2 = true;
    final param = V2TimGroupMemberSearchParam(
      keywordList: [_query],
      groupIDList: [widget.groupID],
      isSearchMemberUserID: true,
      isSearchMemberNickName: true,
      isSearchMemberRemark: true,
      isSearchMemberNameCard: true,
      keywordListMatchType: V2TimGroupMemberSearchParam.V2TIM_KEYWORD_LIST_MATCH_TYPE_OR,
      searchCount: 100,
      searchCursor: searchCursor,
    );
    final res = await ImService.instance.searchGroupMembers(param: param);
    if (res.success && res.data != null) {
      isFinished = res.data!.isFinished ?? true;
      final searchCursor = res.data!.nextCursor ?? '';
      final data = res.data!.groupMemberSearchResultItems;
      // 搜索结果群的成员
      if (data != null && data[widget.groupID] != null) {
        List<V2TimGroupMemberFullInfo> list = (data[widget.groupID] as List<dynamic>).cast<V2TimGroupMemberFullInfo>();
        if (!widget.showSelf) {
          // 过滤自己
          final self = Get.find<GroupDetailController>().selfInfo.value!;
          list = list.where((item) => item.userID != self.userID).toList();
        }
        if (loadMore) {
          searchMemberList.addAll(list);
        } else {
          searchMemberList = list;
        }
      }
      logger.w(hasMore);
      logger.w(searchCursor);
      logger.w(data);
    }
    setState(() {
      loading2 = false;
    });
  }

  String handleText(String? text, String defaultValue) {
    if (text == null || text.trim().isEmpty) return defaultValue;
    return text;
  }

  @override
  Widget build(BuildContext context) {
    List filteredMembers;
    if (_query.isEmpty) {
      filteredMembers = members;
    } else {
      filteredMembers = searchMemberList;
    }
    return SafeArea(
      child: GestureDetector(
        behavior: HitTestBehavior.translucent, // 点击空白区域也能触发
        onTap: () {
          FocusScope.of(context).unfocus();
        },
        child: Scaffold(
          backgroundColor: Colors.white,
          appBar: AppBar(
            centerTitle: true,
            forceMaterialTransparency: true,
            bottom: PreferredSize(
              preferredSize: const Size.fromHeight(1.0),
              child: Container(
                color: Colors.grey[300],
                height: 1.0,
              ),
            ),
            title: Text(
              widget.title,
              style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
            ),
            leading: IconButton(
              icon: const Icon(Icons.arrow_back),
              onPressed: () {
                Navigator.pop(context);
              },
            ),
          ),
          body: Column(
            children: [
              SizedBox(height: 10),
              // 搜索框
              Padding(
                padding: const EdgeInsets.symmetric(horizontal: 16),
                child: TextField(
                  decoration: InputDecoration(
                    prefixIcon: const Icon(Icons.search),
                    hintText: "搜索成员",
                    contentPadding: const EdgeInsets.symmetric(vertical: 8),
                    border: OutlineInputBorder(borderRadius: BorderRadius.circular(8)),
                  ),
                  onChanged: (value) {
                    setState(() {
                      _query = value.trim();
                      searchMember();
                    });
                  },
                ),
              ),

              const SizedBox(height: 8),

              // 成员列表
              Expanded(
                child: EasyRefresh(
                  footer: ClassicFooter(
                    dragText: '加载更多',
                    armedText: '释放加载',
                    readyText: '加载中...',
                    processingText: '加载中...',
                    processedText: '加载完成',
                    noMoreText: '没有更多了～',
                    failedText: '加载失败，请重试',
                    messageText: '最后更新于 %T',
                  ),
                  onLoad: () async {
                    //
                    if (_query.isNotEmpty && (!isFinished)) {
                      await searchMember(loadMore: true);
                      return !isFinished ? IndicatorResult.success : IndicatorResult.noMore;
                    } else if (hasMore) {
                      await getMemberData();
                      return hasMore ? IndicatorResult.success : IndicatorResult.noMore;
                    }
                  },
                  child: ListView.builder(
                    itemCount: filteredMembers.length,
                    itemBuilder: (context, index) {
                      final m = filteredMembers[index];
                      final id = m.userID;
                      final uname = handleText(m.nameCard, '');
                      final nickname = handleText(m.nickName, '未知昵称');
                      final showName = uname.isEmpty ? nickname : uname;
                      return InkWell(
                        onTap: () {
                          setState(() {
                            if (_selectedIDs.contains(id)) {
                              _selectedIDs.remove(id);
                            } else {
                              _selectedIDs.add(id);
                            }
                          });
                        },
                        child: Padding(
                          padding: const EdgeInsets.symmetric(vertical: 8, horizontal: 16),
                          child: Row(
                            children: [
                              // 左侧圆形头像
                              CircleAvatar(
                                radius: 20,
                                backgroundImage: m.faceUrl != null ? NetworkImage(m.faceUrl!) : null,
                                child: m.faceUrl == null ? const Icon(Icons.person) : null,
                              ),
                              const SizedBox(width: 12),

                              // 用户名
                              Expanded(
                                child: Text(
                                  showName,
                                  style: const TextStyle(fontSize: 14),
                                  overflow: TextOverflow.ellipsis,
                                ),
                              ),
                              if (widget.showButton)
                                // 复选框
                                Container(
                                  width: 24,
                                  height: 24,
                                  alignment: Alignment.center,
                                  decoration: BoxDecoration(
                                    shape: BoxShape.circle,
                                    border: Border.all(color: _selectedIDs.contains(id) ? FStyle.primaryColor : Colors.grey),
                                    color: _selectedIDs.contains(id) ? FStyle.primaryColor : Colors.transparent,
                                  ),
                                  child: _selectedIDs.contains(id) ? const Icon(Icons.check, size: 16, color: Colors.white) : null,
                                ),
                            ],
                          ),
                        ),
                      );
                    },
                  ),
                ),
              ),
              // 底部操作按钮
              if (widget.showButton)
                Padding(
                  padding: const EdgeInsets.all(16),
                  child: ElevatedButton(
                    style: ElevatedButton.styleFrom(
                      minimumSize: const Size(double.infinity, 48),
                      backgroundColor: FStyle.primaryColor,
                    ),
                    onPressed: _selectedIDs.isEmpty
                        ? null
                        : () {
                            Navigator.pop(context);
                            widget.onAction(_selectedIDs.toList());
                          },
                    child: Text(
                      "${widget.actionLabel}（${_selectedIDs.length}）",
                      style: TextStyle(
                        color: _selectedIDs.isNotEmpty ? Colors.white : Colors.black,
                      ),
                    ),
                  ),
                ),
            ],
          ),
        ),
      ),
    );
  }
}