import 'package:dio/dio.dart';
import 'package:flutter/material.dart';
import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';
import 'package:huixiang/constant.dart';
import 'package:huixiang/generated/l10n.dart';
import 'package:huixiang/im/database/message.dart';
import 'package:huixiang/main.dart';
import 'package:huixiang/retrofit/data/base_data.dart';
import 'package:huixiang/retrofit/retrofit_api.dart';
import 'package:huixiang/utils/font_weight.dart';
import 'package:huixiang/view_widget/classic_header.dart';
import 'package:huixiang/view_widget/my_footer.dart';
import 'package:huixiang/view_widget/round_button.dart';
import 'package:pull_to_refresh/pull_to_refresh.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import '../../retrofit/data/im_user.dart';
import '../../utils/flutter_utils.dart';
import '../../view_widget/custom_image.dart';
import 'on_chat_message.dart';
import 'on_chat_msg_instance.dart';

class IMPage extends StatefulWidget {
  IMPage(Key key) : super(key: key);

  @override
  State<StatefulWidget> createState() {
    return _IMPage();
  }
}

class _IMPage extends State<IMPage> implements OnChatMessage {
  ApiService apiService;
  int pageNum = 1;
  List<Message> messages = [];
  Map<String, int> msgNumber = {
    "1": 0,
    "2": 0,
    "3": 0,
    "4": 0,
    "5": 0,
    "6": 0,
  };
  int state = 0;
  List<String> userIds = [];
  Map<String, Message> lastMessageMap = {};
  Map<String, int> unreadCountMap = {};
  Map<String, ImUser> contactMap = {};

  @override
  void onMessage(txt) {
    // SmartDialog.showToast("列表 $txt", alignment: Alignment.center);
  }

  @override
  void dispose() {
    super.dispose();
    OnChatMsgInstance.instance.onChatMessage = null;

    socketClient.removeCallback(socketClient.userId);
  }

  @override
  void initState() {
    super.initState();
    OnChatMsgInstance.instance.onChatMessage = this;

    initSocketClient();

    SharedPreferences.getInstance().then((value) {
      apiService = ApiService(Dio(), token: value.getString("token"), context: context);
      // queryMsgStats();
    });
  }

  initSocketClient() async {
    SharedPreferences shared = await SharedPreferences.getInstance();
    String userId = shared.getString("userId");
    socketClient.addCallback(userId, (Message message) {
      if (userIds.contains(message.fromId)) {
        userIds.remove(message.fromId);
      }
      userIds.insert(0, message.fromId);

      lastMessageMap[message.fromId] = message;

      listenerRefresh(message);
    });

    loadMessageList();
  }

  _refresh() {
    pageNum = 1;
    loadMessageList();
    // queryMsgStats();
  }

  listenerRefresh(Message message) async {
    SharedPreferences shared = await SharedPreferences.getInstance();
    String userId = shared.getString("userId");

    await sortConversation(lastMessageMap);

    await queryUnreadCount(userIds, userId);

    debugPrint("messages_records : ${message.toJson()}");
    if (contactMap[message.fromId] == null) {
      queryMemberInfo([message.fromId]);
      return;
    }
    refreshState();
  }

  loadMessageList() async {
    SharedPreferences shared = await SharedPreferences.getInstance();
    String userId = shared.getString("userId");
    messages = await hxDatabase.queryList(userId);

    lastMessageMap = messages.lGroupBy((p0) => p0.toId != userId ? p0.toId : p0.fromId).mGroupItem(key: (p1) => num.parse(p1.time));

    await sortConversation(lastMessageMap);

    await queryUnreadCount(userIds, userId);

    await queryImUserInfo(userIds);

    refreshState();
  }

  /// update conversation by time sort
  sortConversation(lastMessageMap) async {
    SharedPreferences shared = await SharedPreferences.getInstance();
    String userId = shared.getString("userId");
    List<Message> sortMessages = lastMessageMap.values.toList();
    sortMessages.sort((a, b) => (num.parse(b.time)).compareTo(num.parse(a.time)));
    userIds = sortMessages
        .map((e) => e.toId != userId ? e.toId : e.fromId)
        .toSet()
        .where((element) => element != userId)
        .toList();
  }

  /// update conversation unreadcount
  queryUnreadCount(userIds, userId) async {
    unreadCountMap = await hxDatabase.messageUnreadCount(userIds, userId);
    debugPrint("unreadCount: $unreadCountMap");
  }

  /// update imuser info by mids
  queryImUserInfo(userIds) async {
    List<ImUser> contacts = (await hxDatabase.queryImUser(userIds)) ?? [];
    if (contacts?.isEmpty ?? true) {
      await queryMemberInfo(userIds);
      return;
    } else {
      List<String> queryUserIds = userIds.where((u) => contacts.where((c) => c.mid == u).isEmpty).toList();
      if (queryUserIds.isNotEmpty) {
        await queryMemberInfo(queryUserIds);
        return;
      }
    }
    contactMap = contacts.lGroupBy((p0) => p0.mid).mGroupItem();
  }

  /// update one conversation last message ,and update conversation sort
  void updateLastMessage(String userId) async {
    Message message = await hxDatabase.lastMessage(userId);
    debugPrint("lastmessage: $userId  ${message.content}  ${message.toJson()}");
    if (message != null) {
      lastMessageMap[userId] = message;
      await sortConversation(lastMessageMap);
      refreshState();
    }
  }

  void updateUnreadCount() async {
    SharedPreferences shared = await SharedPreferences.getInstance();
    String userId = shared.getString("userId");
    unreadCountMap = await hxDatabase.messageUnreadCount(userIds, userId);
    refreshState();
  }

  refreshState() {
    if(_refreshController.isRefresh)_refreshController.refreshCompleted();
    if (mounted) setState(() {});
  }

  // queryMessage() async {
  //   BaseData<PageInfo<Message>> baseData = await apiService.msgList({
  //     "pageNum": pageNum,
  //     "pageSize": 10,
  //     "searchKey": "",
  //     "state": "",
  //     "typed": ""
  //   }).catchError((onError) {
  //     _refreshController.loadFailed();
  //     _refreshController.refreshFailed();
  //   });
  //
  //   if (baseData != null && baseData.isSuccess) {
  //     if (pageNum == 1) {
  //       messages.clear();
  //     }
  //     List<Message> message = [];
  //     message.addAll(baseData.data.list);
  //     message.forEach((element) {
  //       if (element.typed == 2 || element.typed == 3) {
  //         messages.add(element);
  //       }
  //     });
  //     _refreshController.loadComplete();
  //     _refreshController.refreshCompleted();
  //     if (mounted) setState(() {});
  //     if (pageNum * 10 > int.tryParse(baseData.data.total)) {
  //       _refreshController.loadNoData();
  //     } else {
  //       pageNum += 1;
  //     }
  //   } else {
  //     _refreshController.loadFailed();
  //     _refreshController.refreshFailed();
  //   }
  // }

  // queryMsgStats() async {
  //   if (apiService == null) {
  //     SharedPreferences value = await SharedPreferences.getInstance();
  //     apiService = ApiService(
  //       Dio(),
  //       context: context,
  //       token: value.getString("token"),
  //     );
  //   }
  //   BaseData<List<MsgStats>> baseData = await apiService.stats().catchError((onError) {
  //     debugPrint("stats.error: $onError");
  //   });
  //   if (baseData != null && baseData.isSuccess) {
  //     setState(() {
  //       msgNumber.forEach((key, value) {
  //         msgNumber[key] = 0;
  //       });
  //       baseData.data.forEach((element) {
  //         if (msgNumber.containsKey(element.name)) {
  //           msgNumber[element.name] = element.number;
  //         }
  //       });
  //     });
  //     _refreshController.loadComplete();
  //     _refreshController.refreshCompleted();
  //   }
  //   EasyLoading.dismiss();
  // }

  ///批量查询用户信息
  queryMemberInfo(List<String> mids) async {
    if (mids.isEmpty) {
      return;
    }
    BaseData<List<ImUser>> baseData = await apiService.memberInfoByIds({
      "mids": mids,
    }).catchError((error) {
      SmartDialog.showToast(AppUtils.dioErrorTypeToString(error.type),
          alignment: Alignment.center);
    });
    if (baseData != null && baseData.isSuccess) {
      if (baseData.data.isNotEmpty) {
        baseData.data.forEach((element) async {
          await hxDatabase.insertOrUpdateImUser(element.toJson());
        });
        baseData.data.forEach((element) {
          if (contactMap[element.mid] == null) {
            contactMap[element.mid] = element;
          }
        });
        refreshState();
      }
    } else {
      SmartDialog.showToast(baseData.msg, alignment: Alignment.center);
    }
  }

  final RefreshController _refreshController = RefreshController();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Color(0xFFFFFFFF),
      body: SmartRefresher(
        enablePullDown: true,
        enablePullUp: false,
        header: MyHeader(),
        physics: BouncingScrollPhysics(),
        footer: CustomFooter(
          loadStyle: LoadStyle.ShowWhenLoading,
          builder: (BuildContext context, LoadStatus mode) {
            return (messages.length == 0) ? Container() : MyFooter(mode);
          },
        ),
        controller: _refreshController,
        onRefresh: _refresh,
        onLoading: () {
          _refresh();
        },
        child: Container(
          // color: Colors.white,
          decoration: BoxDecoration(
            gradient: LinearGradient(
              begin: Alignment.topCenter,
              end: Alignment.bottomCenter,
              colors: [
                Color(0xFFD9FFDE),
                Color(0xFFD9FFDE),
                Color(0xFFFFFFFF),
                Color(0xFFFFFFFF),
              ],
              stops: [0, 0.2, 0.4, 1],
            ),
          ),
          child: SingleChildScrollView(
            physics: BouncingScrollPhysics(),
            child: Container(
              padding: EdgeInsets.only(bottom: 30.h),
              child: Column(
                children: [
                  Container(
                    padding: EdgeInsets.only(
                        top: MediaQuery.of(context).padding.top + 12.h,
                        bottom: 15.h,
                        right: 16.w,
                        left: 16.w),
                    child: Row(
                      mainAxisAlignment: MainAxisAlignment.spaceBetween,
                      crossAxisAlignment: CrossAxisAlignment.center,
                      children: [
                        Expanded(
                          child: Text(
                            S.of(context).xiaoxi,
                            style: TextStyle(
                              color: Colors.black,
                              fontSize: 18.sp,
                              fontWeight: MyFontWeight.bold,
                            ),
                          ),
                        ),
                        GestureDetector(
                          behavior: HitTestBehavior.opaque,
                          onTap: () {
                            Navigator.of(context)
                                .pushNamed('/router/chat_friend_group').then((value) {
                              _refresh();
                            });
                          },
                          child: Container(
                            padding: EdgeInsets.all(12),
                            decoration: BoxDecoration(
                              color: Color(0xFFFFFFFF),
                              borderRadius: BorderRadius.circular(20.r),
                            ),
                            child: Image.asset(
                              "assets/image/friend_grouping.webp",
                              fit: BoxFit.fill,
                              height: 14.h,
                              width: 14.h,
                            ),
                          ),
                        ),
                      ],
                    ),
                  ),
                  imPageSearch(),
                  chatList(),
                  // buildMessage(),fgg
                ],
              ),
            ),
          ),
        ),
      ),
    );
  }

  ///搜索
  Widget imPageSearch() {
    return GestureDetector(
      behavior: HitTestBehavior.opaque,
      onTap:(){
        Navigator.of(context).pushNamed('/router/im_search');
      },
      child: Container(
          margin: EdgeInsets.fromLTRB(16.w, 0, 16.w, 0),
          padding: EdgeInsets.symmetric(vertical: 13.h),
          decoration: BoxDecoration(
            color: Color(0xFFFDFCFC),
            borderRadius: BorderRadius.circular(4),
          ),
          child: Row(
            children: [
              Padding(
                padding: EdgeInsets.only(left: 15.w, right: 5.w),
                child: Image.asset(
                  "assets/image/icon_search.webp",
                  width: 14.h,
                  height: 14.h,
                  color: Color(0xFF353535),
                ),
              ),
              Text(
                "搜索",
                style: TextStyle(
                  color: Color(0xFFA29E9E),
                  fontSize: 16.sp,
                  fontWeight: MyFontWeight.regular,
                ),
              ),
            ],
          )
      ),
    );
  }

  ///聊天列表
  Widget chatList() {
    return Container(
      child: ListView.builder(
        padding: EdgeInsets.only(top: 16),
        itemCount: userIds.length,
        shrinkWrap: true,
        physics: NeverScrollableScrollPhysics(),
        itemBuilder: (context, position) {
          return GestureDetector(
            behavior: HitTestBehavior.opaque,
            onTap: () {
              if (userIds[position] == sharedPreferences.getString("userId")) {
                SmartDialog.showToast("不能跟自己聊天", alignment: Alignment.center);
                return;
              }
              Navigator.of(context).pushNamed(
                '/router/chat_details_page',
                arguments: {
                  "toUser": contactMap[userIds[position]],
                },
              ).then((value) {
                unreadCountMap[userIds[position]] = 0;
                updateLastMessage(userIds[position]);
              });
            },
            child: chatItem(userIds[position]),
          );
        },
      ),
    );
  }

  Widget chatItem(userId) {
    return Container(
      padding: EdgeInsets.only(left: 16.w, right: 17.w, bottom: 18.h),
      child: Row(
        children: [
          MImage(
            !contactMap.containsKey(userId)
                ? null
                : contactMap[userId]?.avatar ?? "",
            isCircle: true,
            height: 54.h,
            width: 54.h,
            fit: BoxFit.cover,
            errorSrc: "assets/image/fuka_zj.webp",
            fadeSrc: "assets/image/fuka_zj.webp",
          ),
          SizedBox(
            width: 12.w,
          ),
          Expanded(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Row(
                  children: [
                    Expanded(
                      child: Text(
                        !contactMap.containsKey(userId)
                            ? ""
                            : contactMap[userId]?.nickname ?? "",
                        // overflow: TextOverflow.fade,
                        maxLines: 1,
                        style: TextStyle(
                          fontSize: 16.sp,
                          color: Color(0xFF060606),
                          fontWeight: MyFontWeight.semi_bold,
                        ),
                      ),
                    ),
                    Text(
                      lastMessageMap[userId]?.time != null
                          ? AppUtils.timeFormatter(
                              DateTime.fromMillisecondsSinceEpoch(num.parse(
                                  lastMessageMap[userId]?.time ?? "")))
                          : "",
                      style: TextStyle(
                        fontSize: 12.sp,
                        color: Color(0xFFA29E9E),
                        fontWeight: MyFontWeight.regular,
                      ),
                    ),
                  ],
                ),
                SizedBox(
                  height: 7.h,
                ),
                Row(
                  children: [
                    Expanded(
                      child: Text(
                        lastMessageMap[userId]?.content ?? "",
                        maxLines: 1,
                        overflow: TextOverflow.ellipsis,
                        style: TextStyle(
                          fontSize: 12.sp,
                          color: Color(0xFF353535),
                          fontWeight: MyFontWeight.regular,
                        ),
                      ),
                    ),
                    if (unreadCountMap[userId] != null && unreadCountMap[userId] > 0)
                      Container(
                        width: 16,
                        height: 16,
                        decoration: BoxDecoration(
                          borderRadius: BorderRadius.circular(100),
                          color: Color(0xFFFF441A),
                        ),
                        child: RoundButton(
                          text: "${unreadCountMap[userId]}",
                          textColor: Colors.white,
                          fontWeight: MyFontWeight.regular,
                          backgroup: Color(0xFFFF441A),
                          fontSize: 10.sp,
                          radius: 100,
                        ),
                      ),
                  ],
                ),
              ],
            ),
          ),
        ],
      ),
    );
  }
}