import MessageContent from "./messageContent";
import MessageContentType from "./messageContentType";
import wfc from "../client/wfc";
import LinkMessageContent from "./linkMessageContent";

export default class ArticlesMessageContent extends MessageContent {
  topArticle;
  subArticles;

  constructor() {
    super(MessageContentType.Articles);
  }

  digest(message) {
    return this.topArticle.title;
  }

  encode() {
    let payload = super.encode();
    let obj = {
      top: this.topArticle.toJson(),
    };
    if (this.subArticles) {
      obj["subArticles"] = this.subArticles.map((article) => article.toJson());
    }
    payload.binaryContent = wfc.utf8_to_b64(JSON.stringify(obj));

    return payload;
  }

  decode(payload) {
    super.decode(payload);
    let obj = JSON.parse(wfc.b64_to_utf8(payload.binaryContent));
    this.topArticle = new Article();
    this.topArticle.fromJson(obj.top);
    if (obj.subArticles) {
      this.subArticles = [];
      obj.subArticles.forEach((article) => {
        let tmp = new Article();
        tmp.fromJson(article);
        this.subArticles.push(tmp);
      });
    }
  }

  toLinkMessageContent() {
    let contents = [];
    contents.push(this.topArticle.toLinkMessageContent());
    if (this.subArticles) {
      this.subArticles.forEach((article) => {
        contents.push(article.toLinkMessageContent());
      });
    }
    return contents;
  }
}

class Article {
  articleId;
  cover;
  title;
  digest;
  url;
  readReport;

  toJson() {
    let obj = {
      id: this.articleId,
      cover: this.cover,
      title: this.title,
      url: this.url,
      digest: this.digest,
      rr: this.readReport,
    };
    return obj;
  }

  fromJson(obj) {
    this.articleId = obj.id;
    this.cover = obj.cover;
    this.title = obj.title;
    this.digest = obj.digest;
    this.url = obj.url;
    this.readReport = obj.rr;
  }

  toLinkMessageContent() {
    let content = new LinkMessageContent();
    content.url = this.url;
    content.title = this.title;
    content.contentDigest = this.digest;
    content.thumbnail = this.cover;

    return content;
  }
}