import { INewsItem, IAggregator } from "./aggregator";
import { getRepository } from "typeorm";
import { AggroNewsItem } from "@shared/db/entity/AggroNewsItem";
import cheerio from "cheerio";
import { logger } from "src/logging";
import got from "got";

const kissDiaryRoot = "https://com3d2.world/r18/notices.php";
const FEED_NAME = "com3d2-world-notices";

function isTag<T>(o: T): o is (T & {attribs: { [attr: string]: string };}) {
    return typeof(o) === "object" && Object.keys(o).includes("tagName");
}

async function aggregate() {
    const repo = getRepository(AggroNewsItem);
    
    let lastPost = await repo.findOne({
        select: [ "newsId" ],
        where: { feedName: FEED_NAME },
        order: { newsId: "DESC" }
    });

    if(!lastPost)
        lastPost = repo.create({
            newsId: 0
        });

    try {
        const mainPageRes = await got.get(kissDiaryRoot);
        
        if(mainPageRes.statusCode != 200) {
            logger.error("[COM3D2 WORLD BLOG] Failed to load page. Got response code: %s", mainPageRes.statusCode);
            return [];
        }

        const rootNode = cheerio.load(mainPageRes.body);

        const diaryEntries = rootNode("div.frame a");

        if(!diaryEntries) {
            logger.error("[COM3D2 WORLD BLOG] Failed to find listing!");
            return [];
        }

        const result : INewsItem[] = [];
        let latestEntry = lastPost.newsId;

        for(const a of diaryEntries.toArray()) {
            if (!isTag(a)) {
                continue;
            }
            const idAttrVal = a.attribs.id;
            if(!idAttrVal)
                continue;
            
            const id = +idAttrVal;

            if(id <= lastPost.newsId)
                continue;

            if(id > latestEntry)
                latestEntry = id;

            const diaryLink = `${kissDiaryRoot}?no=${id}`;
            const res = await got.get(diaryLink);
            if(res.statusCode != 200)
                continue;

            const node = cheerio.load(res.body);

            const title = node("div.frame div.notice_title th");
            const contents = node("div.frame div").get(1);

            result.push({
                newsId: id,
                feedId: FEED_NAME,
                link: diaryLink,
                title: title.text(),
                author: "com3d2.world",
                contents: cheerio.html(contents),
                embedColor: 0xa39869
            });
        }
        return result;
    } catch(err) {
        logger.error("Failed to process com3d2.world news: %s", err);
        return [];
    }
}

export default {
    aggregate: aggregate
} as IAggregator;