import type PadLocal from "padlocal-client-ts/dist/proto/padlocal_pb.js";
import type * as PUPPET from "wechaty-puppet";
import { isRoomId } from "../utils/is-type.js";
import type { EventPayload } from "./event.js";
import { parseSysmsgSysmsgTemplateMessagePayload } from "../messages/message-sysmsg.js";
import { parseSysmsgTemplate, SysmsgTemplateLinkProfile } from "../messages/sysmsg/message-sysmsgtemplate.js";
import { parseTextWithRegexList } from "../utils/regex.js";
import { WechatMessageType } from "../types.js";
import { executeRunners } from "../utils/runner.js";

const OTHER_CHANGE_TOPIC_REGEX_LIST = [
  /^"(.+)"修改群名为“(.+)”$/,
  /^"(.+)" changed the group name to "(.+)"$/,
];
const YOU_CHANGE_TOPIC_REGEX_LIST = [
  /^(你)修改群名为“(.+)”$/,
  /^(You) changed the group name to "(.+)"$/,
];

type TopicChange = {changerId: string, newTopic: string};

export default async(puppet: PUPPET.Puppet, message: PadLocal.Message.AsObject): Promise<EventPayload> => {
  const roomId = message.fromusername;
  if (!isRoomId(roomId)) {
    return null;
  }

  /**
   * 1. Message payload "you change the room topic" is plain text with type 10000 : https://gist.github.com/padlocal/0c7bb4f5d51e7e94a0efa108bebb4645
   */
  const youChangeTopic = async() => {
    if (message.type !== WechatMessageType.Sys) {
      return null;
    }

    return parseTextWithRegexList(message.content, YOU_CHANGE_TOPIC_REGEX_LIST, async(_, match) => {
      const newTopic = match[2];

      return {
        changerId: puppet.currentUserId,
        newTopic,
      } as TopicChange;
    });
  };

  /**
   * 2. Message payload "others change room topic" is xml text with type 10002: https://gist.github.com/padlocal/3480ada677839c8c11578d47e820e893
   */
  const otherChangeTopic = async() => {
    const sysmsgTemplatePayload = await parseSysmsgSysmsgTemplateMessagePayload(message);
    if (!sysmsgTemplatePayload) {
      return null;
    }

    return parseSysmsgTemplate<TopicChange>(
      sysmsgTemplatePayload,
      OTHER_CHANGE_TOPIC_REGEX_LIST,
      async(templateLinkList) => {
        // the first item MUST be changers profile link
        const changerList = templateLinkList[0]!.payload as SysmsgTemplateLinkProfile;
        const changerId = changerList[0]!.userName;

        // the second item MUST be new topic link
        const newTopicList = templateLinkList[1]!.payload as SysmsgTemplateLinkProfile;
        const newTopic = newTopicList[0]!.nickName;

        return {
          changerId,
          newTopic,
        } as TopicChange;
      });
  };

  const topicChange = await executeRunners<TopicChange>([ youChangeTopic, otherChangeTopic ]);
  if (topicChange) {
    const room = await puppet.roomPayload(roomId);
    const oldTopic = room.topic;

    return {
      changerId: topicChange.changerId,
      newTopic: topicChange.newTopic,
      oldTopic,
      roomId,
      timestamp: message.createtime,
    } as PUPPET.payloads.EventRoomTopic;
  }

  return null;
};