import { CheerioAPI, load as parseHTML } from "cheerio";
import { fetchApi, fetchFile } from "@libs/fetch";
import { Plugin } from "@typings/plugin";
import { Filters } from "@libs/filterInputs";

class NovelBuddy implements Plugin.PluginBase {
    id = "novelbuddy";
    name = "NovelBuddy.io";
    site = "https://novelbuddy.io/";
    version = "1.0.0";
    icon = "src/en/novelbuddy/icon.png";
    filters?: undefined; //TODO: Filters, Filters in Filters required

    parseNovels(loadedCheerio: CheerioAPI){
        const novels: Plugin.NovelItem[] = [];

        loadedCheerio(".book-item").each((idx, ele) => {
            const novelName = loadedCheerio(ele).find(".title").text();
            const novelCover =
                "https:" + loadedCheerio(ele).find("img").attr("data-src");
            const novelUrl = loadedCheerio(ele).find(".title a").attr("href")?.substring(1);

            if (!novelUrl) return;

            const novel = { name: novelName, cover: novelCover, path: novelUrl };

            novels.push(novel);
        });

        return novels;
    }

    async popularNovels(
        pageNo: number,
        options: Plugin.PopularNovelsOptions
    ): Promise<Plugin.NovelItem[]> {
        const url = `${this.site}popular?page=${pageNo}`;

        const result = await fetchApi(url);
        const body = await result.text();

        const loadedCheerio = parseHTML(body);
        return this.parseNovels(loadedCheerio);
    }

    async parseNovel(novelPath: string): Promise<Plugin.SourceNovel> {
        const result = await fetchApi(this.site + novelPath);
        const body = await result.text();

        let loadedCheerio = parseHTML(body);

        const novel: Plugin.SourceNovel = {
            path: novelPath,
            name: loadedCheerio(".name h1").text().trim() || "Untitled",
            cover: "https:" + loadedCheerio(".img-cover img").attr("data-src"),
            summary: loadedCheerio('.section-body.summary').text().trim(),
            chapters: [],
        };

        loadedCheerio('.meta.box p').each((i,el) => {
            const detailName = loadedCheerio(el).find('strong').text();
            const detail = loadedCheerio(el).find('a');
            
            switch(detailName){
                case "Authors :":
                    novel.author = detail.find('span')
                        .map((a,ex) => loadedCheerio(ex).text())
                        .toArray()
                        .join(', ');
                    break;
                case "Status :":
                    novel.status = detail.text();
                    break;
                case "Genres :":
                    novel.genres = detail.text().trim();
                    break;
            }
        })
        const novelId = loadedCheerio('script')
            .text()
            .match(/bookId = (\d+);/)![1];
        const chapter: Plugin.ChapterItem[] = [];

        const getChapters = async (id: string) => {
            const chapterListUrl = `${this.site}api/manga/${id}/chapters?source=detail`;
            const data = await fetchApi(chapterListUrl);
            const chapterlist = await data.text();

            loadedCheerio = parseHTML(chapterlist);

            loadedCheerio("li").each((i,el) => {
                const chapterName = loadedCheerio(el)
                    .find(".chapter-title")
                    .text()
                    .trim();
    
                const releaseDate = loadedCheerio(el)
                    .find(".chapter-update")
                    .text()
                    .trim();
                
                const months = [
                    "jan",
                    "feb",
                    "mar",
                    "apr",
                    "may",
                    "jun",
                    "jul",
                    "aug",
                    "sep",
                    "oct",
                    "nov",
                    "dec",
                ].join("|");
                const rx = new RegExp(`(${months}) (\\d{1,2}), (\\d{4})`,'i')
                    .exec(releaseDate);
                if (!rx) return;
                const year = +rx[3];
                const month = months.indexOf(rx[1].toLowerCase());
                const day = +rx[2];
    
                const chapterUrl = loadedCheerio(el).find("a").attr("href")?.slice(1);
    
                if (!chapterUrl) return;
    
                chapter.push({
                    name: chapterName,
                    releaseTime: new Date(year, month, day).toISOString(),
                    path: chapterUrl,
                });
            });
            return chapter;
        }

        novel.chapters = (await getChapters(novelId)).reverse();

        return novel;
    }

    async parseChapter(chapterPath: string): Promise<string> {
        const result = await fetchApi(this.site + chapterPath);
        const body = await result.text();

        const loadedCheerio = parseHTML(body);

        loadedCheerio("#listen-chapter").remove();
        loadedCheerio("#google_translate_element").remove();

        const chapterText = loadedCheerio(".chapter__content").html() || '';

        return chapterText;
    }

    async searchNovels(searchTerm: string, page: number): Promise<Plugin.NovelItem[]> {
        const url = `${this.site}search?q=${searchTerm}&page=${page}`;

        const result = await fetchApi(url);
        const body = await result.text();

        const loadedCheerio = parseHTML(body);
        return this.parseNovels(loadedCheerio);
    }

    async fetchImage(url: string): Promise<string | undefined> {
        return fetchFile(url);
    }
    
}

export default new NovelBuddy();