flutter/lib/pages/groupChat/index.dart

// 创建群聊
import 'package:easy_refresh/easy_refresh.dart';
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:loopin/IM/controller/im_user_info_controller.dart';
import 'package:loopin/IM/im_message.dart';
import 'package:loopin/IM/im_service.dart';
import 'package:loopin/components/network_or_asset_image.dart';
import 'package:loopin/styles/index.dart';
import 'package:tencent_cloud_chat_sdk/enum/group_member_role_enum.dart';
import 'package:tencent_cloud_chat_sdk/enum/group_type.dart';
import 'package:tencent_cloud_chat_sdk/models/v2_tim_conversation.dart';
import 'package:tencent_cloud_chat_sdk/models/v2_tim_group_member.dart';
import 'package:tencent_cloud_chat_sdk/models/v2_tim_user_full_info.dart';

class StartGroupChatPage extends StatefulWidget {
  const StartGroupChatPage({super.key});

  @override
  State<StartGroupChatPage> createState() => _StartGroupChatPageState();
}

class _StartGroupChatPageState extends State<StartGroupChatPage> {
  final TextEditingController _searchController = TextEditingController();

  List<V2TimUserFullInfo> dataList = [];
  List<V2TimUserFullInfo> filteredList = [];
  Set<String> selectedIds = {}; // 已选中的用户 id
  String page = '';
  bool hasMore = true;
  bool isLoading = true;
  bool makeGroup = true;

  @override
  void initState() {
    super.initState();
    _loadData(reset: true);
  }

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

  // 分页获取关注列表数据
  Future<void> _loadData({bool reset = false}) async {
    if (reset) {
      page = '';
      hasMore = true;
      dataList.clear();
    }
    final res = await ImService.instance.getMutualFollowersList(
      nextCursor: page,
    );
    if (res.success && res.data != null) {
      final userInfoList = res.data!.userFullInfoList ?? [];
      final isFinished = res.data!.nextCursor == null || res.data!.nextCursor!.isEmpty;
      logger.w('获取成功：${res.data!.nextCursor},是否还有更多：$isFinished');

      if (isFinished) {
        setState(() {
          hasMore = false;
        });
        // 加载没数据了
        page = '';
      } else {
        page = res.data!.nextCursor ?? '';
      }
      logger.i('获取数据成功：$userInfoList');
      setState(() {
        dataList.addAll(userInfoList);
        _applySearch(_searchController.text);
      });
    } else {
      logger.e('获取数据失败：${res.desc}');
    }
  }

  void _applySearch(String query) {
    setState(() {
      if (query.isEmpty) {
        filteredList = List.from(dataList);
      } else {
        filteredList = dataList.where((item) => (item.nickName ?? '').contains(query.trim())).toList();
      }
    });
  }

  void _toggleSelection(String id) {
    setState(() {
      if (selectedIds.contains(id)) {
        selectedIds.remove(id);
      } else {
        selectedIds.add(id);
      }
    });
  }

  /// 创建群聊
  void createGroup(Set<String> selectedIds) async {
    logger.w(makeGroup);
    if (makeGroup == false) {
      return;
    }
    setState(() {
      makeGroup = false;
    });
    // dataList是原始数据List<V2TimUserFullInfo> dataList = [];
    // 通过dataList和selectedIds来构建memberList
    final ctl = Get.find<ImUserInfoController>();
    final memberList = dataList
        .where((user) => selectedIds.contains(user.userID))
        .map((user) => V2TimGroupMember(
              userID: user.userID!,
              role: GroupMemberRoleTypeEnum.V2TIM_GROUP_MEMBER_ROLE_MEMBER, // 加群的成员角色（默认普通成员）
            ))
        .toList();
    final self = V2TimGroupMember(
      userID: ctl.userID.value,
      role: GroupMemberRoleTypeEnum.V2TIM_GROUP_MEMBER_ROLE_OWNER, // 建群的人为群主
    );
    memberList.insert(0, self);
    final groupName = buildGroupName(selectedIds);
    try {
      final res = await ImService.instance.createGroup(groupType: GroupType.Work, groupName: groupName, memberList: memberList);
      if (res.success) {
        final groupID = res.data;
        logger.w(groupID);
        // final V2TimConversation conv = V2TimConversation(conversationID: 'group_$groupID');
        // conv.showName = groupName;
        final msgRes = await IMMessage().createTextMessage(text: '加入了群聊：$groupName');
        if (msgRes.success && msgRes.data?.messageInfo != null) {
          final groupRes = await IMMessage().sendMessage(
            msg: msgRes.data!.messageInfo!,
            groupID: groupID,
            isExcludedFromUnreadCount: true,
            isPush: false,
            groupName: groupName,
            cloudCustomData: 'tips',
          );
          if (groupRes.success) {
            final convRes = await ImService.instance.getConversation(conversationID: 'group_$groupID');
            if (convRes.success) {
              setState(() {
                makeGroup = true;
              });
              final V2TimConversation conv = convRes.data;
              logger.e(conv.toJson());
              await Get.toNamed('/chatGroup', arguments: conv);
            }
          }
        }
      }
    } catch (e) {
      logger.e(e);
      //修改按钮可操作状态
      setState(() {
        makeGroup = true;
      });
    }
  }

  // 构建默认群名称
  String buildGroupName(Set<String> selectedIds) {
    int maxLength = 20;
    // 根据 selectedIds 找到对应的昵称
    final memberNicknames = selectedIds.map((id) {
      final user = dataList.firstWhere(
        (u) => u.userID == id,
        orElse: () => V2TimUserFullInfo(userID: id, nickName: id),
      );
      return user.nickName?.isNotEmpty == true ? user.nickName! : user.userID;
    }).toList();
    final ctl = Get.find<ImUserInfoController>();
    // 插入群主的信息
    memberNicknames.insert(0, ctl.nickname.value);

    // 拼接成群名
    String name = memberNicknames.join("、");

    // 如果超过长度限制，截断
    if (name.length > maxLength) {
      name = "${name.substring(0, maxLength - 3)}...";
    }

    return name;
  }

  // 空状态提示
  Widget _emptyTip(String text) {
    return Center(
      child: Column(
        mainAxisSize: MainAxisSize.min,
        children: [
          Image.asset('assets/images/empty.png', width: 100),
          const SizedBox(height: 8),
          Text(
            text,
            style: const TextStyle(color: Colors.grey, fontSize: 13),
          ),
        ],
      ),
    );
  }

  Widget _buildCard({
    required IconData icon,
    required String title,
    required VoidCallback onTap,
  }) {
    return Card(
      color: Colors.white,
      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
      child: ListTile(
        leading: Icon(icon, color: Colors.black),
        title: Text(title, style: const TextStyle(fontSize: 16)),
        trailing: const Icon(Icons.arrow_forward_ios, size: 16),
        onTap: onTap,
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return 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: const Text(
          "创建群聊",
          style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
        ),
      ),
      body: Column(
        children: [
          // 上半部分 - 两个卡片
          // Padding(
          //   padding: const EdgeInsets.all(8.0),
          //   child: Column(
          //     children: [
          //       _buildCard(
          //         icon: Icons.public,
          //         title: "创建公开群",
          //         onTap: () {
          //           logger.w("跳转到 创建公开群");
          //         },
          //       ),
          //       _buildCard(
          //         icon: Icons.group,
          //         title: "创建好友群",
          //         onTap: () {
          //           logger.w("跳转到 创建好友群");
          //         },
          //       ),
          //     ],
          //   ),
          // ),

          // const Divider(),

          // 下半部分
          Expanded(
            child: Column(
              children: [
                // 搜索框
                Padding(
                  padding: const EdgeInsets.all(8.0),
                  child: TextField(
                    controller: _searchController,
                    decoration: InputDecoration(
                      hintText: "搜索用户昵称",
                      prefixIcon: const Icon(Icons.search),
                      border: OutlineInputBorder(
                        borderRadius: BorderRadius.circular(8),
                      ),
                    ),
                    onChanged: _applySearch,
                  ),
                ),

                // 列表
                Expanded(
                  child: EasyRefresh(
                    header: ClassicHeader(
                      dragText: '下拉刷新',
                      armedText: '释放刷新',
                      readyText: '加载中...',
                      processingText: '加载中...',
                      processedText: '加载完成',
                      failedText: '加载失败，请重试',
                      messageText: '最后更新于 %T',
                    ),
                    footer: ClassicFooter(
                      dragText: '加载更多',
                      armedText: '释放加载',
                      readyText: '加载中...',
                      processingText: '加载中...',
                      processedText: hasMore ? '加载完成' : '没有更多了～',
                      failedText: '加载失败，请重试',
                      messageText: '最后更新于 %T',
                    ),
                    onRefresh: () async => _loadData(reset: true),
                    onLoad: () async {
                      if (hasMore) await _loadData();
                    },
                    child: filteredList.isEmpty
                        ? _emptyTip('暂无数据')
                        : ListView.builder(
                            itemCount: filteredList.length,
                            itemBuilder: (context, index) {
                              final item = filteredList[index];
                              final id = item.userID as String;
                              final isSelected = selectedIds.contains(id);

                              return ListTile(
                                leading: ClipOval(
                                  // child: Text((item.nickName ?? '未知').substring(0, 1)),
                                  child: NetworkOrAssetImage(
                                    imageUrl: item.faceUrl,
                                    width: 48,
                                    height: 48,
                                  ),
                                ),
                                title: Text(item.nickName ?? '未知'),
                                trailing: Checkbox(
                                  value: isSelected,
                                  shape: const CircleBorder(),
                                  onChanged: (_) => _toggleSelection(id),
                                ),
                                onTap: () => _toggleSelection(id),
                              );
                            },
                          ),
                  ),
                ),
              ],
            ),
          ),
        ],
      ),

      // 底部按钮
      bottomNavigationBar: SafeArea(
          child: Padding(
        padding: const EdgeInsets.all(12.0),
        child: TweenAnimationBuilder<Color?>(
          duration: const Duration(milliseconds: 300),
          tween: ColorTween(
            begin: Colors.grey,
            end: (selectedIds.isNotEmpty && makeGroup == true) ? FStyle.primaryColor : Colors.grey,
          ),
          builder: (context, bgColor, _) {
            return ElevatedButton(
              onPressed: (selectedIds.isEmpty && makeGroup == false)
                  ? null
                  : () {
                      logger.w("选择了用户：$selectedIds");
                      createGroup(selectedIds);
                    },
              style: ElevatedButton.styleFrom(
                minimumSize: const Size.fromHeight(50),
                backgroundColor: bgColor,
                shape: const StadiumBorder(), // 胶囊形状
              ),
              child: AnimatedDefaultTextStyle(
                duration: const Duration(milliseconds: 300),
                style: TextStyle(
                  fontSize: 16,
                  color: selectedIds.isEmpty ? Colors.black : Colors.white,
                ),
                child: const Text("发起聊天"),
              ),
            );
          },
        ),
      )),
    );
  }
}