import { type Handler } from "aws-lambda";
import { createRestAPIClient, mastodon } from "masto";

import ScraperArticles from "../utils/scraper-articles";
import TagGenerator from "../utils/tag-generator";
import RedisClient from "../libs/redis-client";
import LogLevels from "../enums/log-levels";
import Emojis from "../enums/emojis";
import config from "../config";

import { type IScraperArticlesOptions } from "../interfaces/scaper-articles-options";

export default class Portal {
  private readonly _name: string;
  private readonly _scraperArticlesOptions: IScraperArticlesOptions
  private readonly _redisClient: RedisClient;
  private readonly _mastodonClient: mastodon.rest.Client
  private readonly _scraperArticles: ScraperArticles;
  private readonly _tagGenerator: TagGenerator;

  constructor (name: string, accessToken = config.MASTODON_TEST_ACCESS_TOKEN, scraperArticlesOptions: IScraperArticlesOptions) {
    this._name = name;
    this._scraperArticlesOptions = scraperArticlesOptions;
    this._scraperArticles = new ScraperArticles(this._name, this._scraperArticlesOptions);
    this._redisClient = new RedisClient();
    this._tagGenerator = new TagGenerator(this._name);

    accessToken = config.DEVELOP ? config.MASTODON_TEST_ACCESS_TOKEN : accessToken;
    this._mastodonClient = createRestAPIClient({ url: config.MASTODON_URL, accessToken });
  }

  public async run (event?: any, context?: any): Promise<void> {
    try {
      const articles = await this._scraperArticles.getArticles();
      if (config.LOG_LEVEL === LogLevels.DEBUG) {
        console.log(`${this._name} | Articles`, articles);
      }

      let totalPublished = 0;

      // Deduplicate articles by link within the same batch
      const seenLinks = new Set<string>();
      const uniqueArticles = articles.filter((article) => {
        if (seenLinks.has(article.link)) {
          return false;
        }
        seenLinks.add(article.link);
        return true;
      });

      // Order has to be reversed to appear in the correct order when posting
      uniqueArticles.reverse();

      const maxArticles = this._scraperArticlesOptions.maxArticles;
      const articlesToPublish = maxArticles !== undefined && maxArticles > 0
        ? uniqueArticles.slice(0, maxArticles)
        : uniqueArticles;

      const length = articlesToPublish.length;
      for (let i = 0; i < length; i++) {
        const article = articlesToPublish[i];
        const exists = await this._redisClient.retrieve(article.link);

        if (exists !== null) {
          continue;
        }

        // To avoid publiposts (I'm lookint at you La Tercera >:-|)
        if (article.link.includes("publirreportajes") || article.link.includes("publireportajes")) {
          continue;
        }

        if (article.title.includes("Exclusivo suscriptor")) {
          article.title = article.title.replace("Exclusivo suscriptor", "");
        }

        article.title = article.title.replace(/\s+/g, " ").trim();
        if (article.content !== "") {
          article.content = article.content.replace(/\s+/g, " ").trim();
        }

        let message = `${Emojis.NEWS} ${article.title}`;
        if (article.content !== "") {
          message += `\n\n${article.content}`;
        }

        if (message.trim().length <= 10) {
          continue;
        }

        // Generating hashtags from article content using Ollama
        const generatedTags = await this._tagGenerator.generate(article.title, article.content);
        const tags = generatedTags.length > 0
          ? generatedTags
          : (this._scraperArticlesOptions.hashtags ?? []);

        message += `\n${Emojis.LINK} ${article.link}`;

        if (tags.length > 0) {
          message += `\n\n${tags.map((hashtag) => `#${hashtag}`).join(" ")}`;
        }

        // Mastodon allows a maximum of 500 characters, but historically this bot limits to 400
        if (message.length > 400) {
          const linkLine = `\n${Emojis.LINK} ${article.link}`;
          const tagsLine = tags.length > 0
            ? `\n\n${tags.map((hashtag) => `#${hashtag}`).join(" ")}`
            : "";
          const maxContentLength = 400 - linkLine.length - tagsLine.length;
          message = `${Emojis.NEWS} ${article.title}\n\n${article.content.substring(0, Math.max(0, maxContentLength - 10))}...${linkLine}${tagsLine}`;
        }

        if (this._name.toUpperCase() == "Chile Cultura".toUpperCase()) {
          // Icons Chilecultura
          let regex = new RegExp(/\n(\d{1,2} \w{3})\s*\n?\s*-\s*(\d{1,2} \w{3})/);
          message = message.replace("date_range", `${Emojis.CALENDAR} `);
          message = message.replace(regex, (match, p1, p2) => {
            return `${p1} - ${p2}`;
          });
          
          message = message.replace("location_on", Emojis.PIN).replace(`${Emojis.PIN}\n`, `${Emojis.PIN} `);
          
          // Expresión regular para capturar el texto antes del 📆 seguido de una fecha
          regex = new RegExp(/(.*?)📆 (\d{1,2} \w{3}( - \d{1,2} \w{3}))?/);
          message = message.replace(regex, (match, p1, p2) => {
            const tags = p1 ? p1.split(" ").map(tag => `#${tag}`).join(" ") : "";
            return `🎭 ${tags}\n📆 ${p2 ? p2 : ""}`;
          });
        }

        const mediaIds: any[] = [];
        if (article.image !== null && article.image !== undefined) {
          const media = await this._mastodonClient.v2.media.create({ file: article.image, description: article.title });
          mediaIds.push(media.id);
        }

        console.log(`\n${this._name} | Sending\n`, message);

        await this._mastodonClient.v1.statuses.create({ status: message, mediaIds });
        totalPublished++
        if (!config.DEVELOP) {
          await this._redisClient.store(
            article.link, 
            new Date(Date.now()).toLocaleDateString(), 
            { EX: this._scraperArticlesOptions.cacheExpiration ? this._scraperArticlesOptions.cacheExpiration : 60 * 60 * 24 } // EX: 24 hrs expiration
          );
        }
      }
      console.log(`${this._name} | Published ${totalPublished} new articles`);
    } catch (err: any) {
      console.log(`${this._name} | An error has occurred\n`)
      console.error(err.message);
      if (config.LOG_LEVEL === LogLevels.DEBUG) {
        if (event !== undefined) {
          console.debug("\nEvent\n");
          console.debug(event);
        }

        if (context !== undefined) {
          console.debug("\nContext\n");
          console.debug(context);
        }
      }
    }
    console.log(`${this._name} | Finished`);
  }

  public getHandler (): Handler {
    return async (event, context) => {
      await this.run(event, context);
    }
  }
}