import 'package:dio/dio.dart';
import 'package:flutter/material.dart';
import 'package:flutter_slidable/flutter_slidable.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> conversationIds = [];
  Map<String, Message> lastMessageMap = {};
  Map<String, int> unreadCountMap = {};
  Map<String, ImUser> contactMap = {};
  int insertIndex = 0;
  String selfUserId;

  @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();
    selfUserId = shared.getString("userId");
    socketClient.addCallback(selfUserId, (Message message) {
      if (conversationIds.contains(message.conversationId)) {
        conversationIds.remove(message.conversationId);
      }
      conversationIds.insert(insertIndex, message.conversationId);

      lastMessageMap[message.conversationId] = message;

      listenerRefresh(message);
    });

    loadMessageList();
  }

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

  listenerRefresh(Message message) async {
    await sortConversation(lastMessageMap);

    await queryUnreadCount(conversationIds);

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

  loadMessageList() async {
    messages = await hxDatabase.queryList();

    lastMessageMap = messages.lGroupBy((p0) => p0.conversationId).mGroupItem(key: (p1) => num.parse(p1.time));

    await queryImUserInfo(messages.map((e) => e.toId != selfUserId ? e.toId : e.fromId).toList());

    await sortConversation(lastMessageMap);

    await queryUnreadCount(conversationIds);

    refreshState();
  }

  /// update conversation by time sort
  sortConversation(lastMessageMap) async {
    List<Message> sortMessages = lastMessageMap.values.toList();
    sortMessages.sort((a, b) => (num.parse(b.time)).compareTo(num.parse(a.time)));
    conversationIds = sortMessages
        .map((e) => e.conversationId)
        .toSet()
        .toList();
  }

  /// update conversation unreadcount
  queryUnreadCount(conversationIds) async {
    unreadCountMap = await hxDatabase.messageUnreadCount(conversationIds);
    debugPrint("unreadCountMap: $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) => conversationId(p0.mid, selfUserId)).mGroupItem();
    List<String> topConversationIds = [],notTopUserIds = [];
    contactMap.forEach((key, value) {
      if(value.isTop == 1)
        topConversationIds.add(key);
      else
        notTopUserIds.add(key);
    });
    insertIndex = topConversationIds.length;
    this.conversationIds = topConversationIds..addAll(notTopUserIds);
  }

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

  void updateUnreadCount() async {
    unreadCountMap = await hxDatabase.messageUnreadCount(conversationIds);
    refreshState();
  }

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

  ///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[conversationId(element.mid, selfUserId)] == null) {
            contactMap[conversationId(element.mid, selfUserId)] = 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: Container(
        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: 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: SingleChildScrollView(
            physics: BouncingScrollPhysics(),
            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(),
              ],
            ),
          ),
        ),
      ),
    );
  }

  ///搜索
  Widget imPageSearch() {
    return GestureDetector(
      behavior: HitTestBehavior.opaque,
      onTap:(){
        Navigator.of(context).pushNamed('/router/im_search').then((value) {
          _refresh();
        });
      },
      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: SlidableAutoCloseBehavior(
        child: ListView(
          padding: EdgeInsets.only(top: 16),
          shrinkWrap: true,
          physics: NeverScrollableScrollPhysics(),
          children: conversationIds.map((e) {
            int position = conversationIds.indexOf(e);
            return ClipRRect(
              // borderRadius: BorderRadius.all(Radius.circular(4)),
              child: Slidable(
                groupTag: true,
                endActionPane: ActionPane(
                  extentRatio:0.16,
                  motion: ScrollMotion(),
                  children: [
                    CustomSlidableAction(
                      onPressed: (bc) {
                        showDelDialog(conversationIds[position]);
                      },
                      backgroundColor: Color(0xFFFB312B),
                      foregroundColor: Colors.white,
                      child: Container(
                        color: Colors.red,
                        height: double.infinity,
                        alignment: Alignment.center,
                        child: Text(
                          S.of(context).shanchu,
                          style: TextStyle(
                            color: Colors.white,
                            fontSize: 14.sp,
                            fontWeight: MyFontWeight.regular,
                          ),
                        ),
                      ),
                    ),
                  ],
                ),
                child: GestureDetector(
                  behavior: HitTestBehavior.opaque,
                  onTap: () {
                    Navigator.of(context).pushNamed(
                      '/router/chat_details_page',
                      arguments: {
                        "toUser": contactMap[conversationIds[position]],
                      },
                    ).then((value) {
                      unreadCountMap[conversationIds[position]] = 0;
                      updateLastMessage(conversationIds[position]);
                      _refresh();
                    });
                  },
                  child: chatItem(conversationIds[position]),
                ),
              ),
            );
          }).toList(),
        ),
      ),
    );
  }

  Widget chatItem(conversationId) {
    return Container(
      padding: EdgeInsets.only(
        left: 16.w, right: 17.w, bottom: 18.h,
      ),
      child: Row(
        children: [
          MImage(
            !contactMap.containsKey(conversationId)
                ? null
                : contactMap[conversationId]?.avatar ?? "",
            isCircle: true,
            height: 54.h,
            width: 54.h,
            fit: BoxFit.cover,
            errorSrc: "assets/image/default_1.webp",
            fadeSrc: "assets/image/default_1.webp",
          ),
          SizedBox(
            width: 12.w,
          ),
          Expanded(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Row(
                  children: [
                    Expanded(
                      child: Text(
                        !contactMap.containsKey(conversationId)
                            ? ""
                            : contactMap[conversationId]?.nickname ?? "",
                        // overflow: TextOverflow.fade,
                        maxLines: 1,
                        style: TextStyle(
                          fontSize: 16.sp,
                          color: Color(0xFF060606),
                          fontWeight: MyFontWeight.semi_bold,
                        ),
                      ),
                    ),
                    Text(
                      lastMessageMap[conversationId]?.time != null
                          ? AppUtils.timeFormatter(
                              DateTime.fromMillisecondsSinceEpoch(num.parse(
                                  lastMessageMap[conversationId]?.time ?? "")))
                          : "",
                      style: TextStyle(
                        fontSize: 12.sp,
                        color: Color(0xFFA29E9E),
                        fontWeight: MyFontWeight.regular,
                      ),
                    ),
                  ],
                ),
                SizedBox(
                  height: 7.h,
                ),
                Row(
                  children: [
                    Expanded(
                      child: Text(
                        lastMessageMap[conversationId]?.content ?? "",
                        maxLines: 1,
                        overflow: TextOverflow.ellipsis,
                        style: TextStyle(
                          fontSize: 12.sp,
                          color: Color(0xFF353535),
                          fontWeight: MyFontWeight.regular,
                        ),
                      ),
                    ),
                    if (unreadCountMap[conversationId] != null && unreadCountMap[conversationId] > 0)
                      Container(
                        width: 16,
                        height: 16,
                        decoration: BoxDecoration(
                          borderRadius: BorderRadius.circular(100),
                          color: Color(0xFFFF441A),
                        ),
                        child: RoundButton(
                          text: "${unreadCountMap[conversationId]}",
                          textColor: Colors.white,
                          fontWeight: MyFontWeight.regular,
                          backgroup: Color(0xFFFF441A),
                          fontSize: 10.sp,
                          radius: 100,
                        ),
                      ),
                  ],
                ),
              ],
            ),
          ),
        ],
      ),
    );
  }


  ///确认删除弹窗
  showDelDialog(conversationId) {
    showDialog(
      context: context,
      builder: (context) {
        return AlertDialog(
          contentPadding: EdgeInsets.zero, // 移除默认内边距
          content: Container(
            // width: MediaQuery.of(context).size.width - 84,
            height: 130.h,
            decoration: BoxDecoration(
              borderRadius: BorderRadius.circular(4),
            ),
            child: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              crossAxisAlignment: CrossAxisAlignment.center,
              children: [
                Expanded(child:Container(
                  alignment:Alignment.center,
                  child: Text(
                    "删除并清空聊天记录",
                    style: TextStyle(
                      color: Color(0xFF060606),
                      fontSize: 16.sp,
                      fontWeight: MyFontWeight.bold,
                    ),
                  ),
                ),
                ),
                // Spacer(),
                Container(
                  height:1.h,
                  width: double.infinity,
                  color:Color(0xFFEDEDED),
                ),
                Row(
                  children: [
                    Expanded(
                        child: GestureDetector(
                            behavior: HitTestBehavior.opaque,
                            onTap: () {
                              Navigator.of(context).pop();
                            },
                            child: Container(
                                child: Text(
                                    "取消",
                                    textAlign: TextAlign.center,
                                    style: TextStyle(
                                      fontSize: 16.sp,
                                      color: Color(0xFF060606),
                                    )
                                )
                            )
                        )
                    ),
                    Container(
                      height:45,
                      width: 1.w,
                      color: Color(0xFFEDEDED),
                    ),
                    Expanded(
                        child: GestureDetector(
                            behavior: HitTestBehavior.opaque,
                            onTap: () async{
                              await hxDatabase.deleteByUser(conversationId);
                              _refresh();
                              Navigator.of(context).pop();
                            },
                            child: Text(
                                "确认",
                                textAlign: TextAlign.center,
                                style: TextStyle(
                                  color: Color(0xFFFF370A),
                                ),
                            ),
                        ),
                    ),
                  ],
                )
              ],
            ),
          ),
        );
      },
    );
  }
}