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

class TruyenFull implements Plugin.PagePlugin {
    id = "truyenchu";
    name = "Truyện Chữ";
    icon = "src/vi/truyenchu/icon.png";
    site = "https://truyenchu.vn";
    version = "1.0.0";

    parseNovels(loadedCheerio: CheerioAPI){
        const novels: Plugin.NovelItem[] = [];
        loadedCheerio(".list-truyen .row").each((idx, ele) => {
            const novelName = loadedCheerio(ele)
                .find("h3.truyen-title > a")
                .text();

            const novelCover = this.site + loadedCheerio(ele).find("div[data-classname='cover']").attr("data-image");

            const novelUrl = loadedCheerio(ele)
                    .find("h3.truyen-title > a")
                    .attr("href");
            if(novelUrl){
                novels.push({
                    name: novelName,
                    cover: novelCover,
                    path: novelUrl.replace(this.site, '')
                });
            }
        });
        return novels;
    }
    parseChapters(html: string){
        const listChapterHTML = 
        html.match(/("list_chapter":\s?\\{0}"(.+)\\{0}"),/)?.[1];
        if(!listChapterHTML) throw new Error("Không tải được chương");
        const listChapter = JSON.parse(`{${listChapterHTML}}`);
        const loadedChapterList = parseHTML(listChapter.list_chapter);
        const chapters: Plugin.ChapterItem[] = [];        
        loadedChapterList('ul > li > a').each((idx, ele) => {
            const path = ele.attribs['href'].replace(this.site, '');
            if(path){
                chapters.push({
                    name: ele.attribs['title'],
                    path,
                    chapterNumber: Number(path.match(/\/chuong-(\d+)/)?.[1])
                })
            }
        });
        return chapters;
    }
    async popularNovels(pageNo: number, options: Plugin.PopularNovelsOptions<Filters>): Promise<Plugin.NovelItem[]> {
        const url = `${this.site}/danh-sach/truyen-hot?page=${pageNo}`;
        const result = await fetch(url);
        const body = await result.text();        
        const loadedCheerio = parseHTML(body);

        return this.parseNovels(loadedCheerio);
    }
    async parseNovel(novelPath: string): Promise<Plugin.SourceNovel & {totalPages: number}> {
        const url = this.site + novelPath;
        
        const result = await fetch(url);
        const body = await result.text();

        let loadedCheerio = parseHTML(body);
        let lastPage = 1;
        const regex = new RegExp(`${novelPath}\\?page=\\d+`, 'g');
        body.match(regex)?.forEach(v => {
            const page = Number(v.match(/\?page=(\d+)/)?.[1]);
            if(page && page > lastPage){
                lastPage = page;
            }
        });
        const novel: Plugin.SourceNovel & {totalPages: number} = {
            path: novelPath,
            name: loadedCheerio("div.book > img").attr("alt") || 'Không có tiêu đề',
            chapters: [],
            totalPages: lastPage,
        };

        novel.cover = this.site + loadedCheerio("div.book > img").attr("src");

        novel.summary = loadedCheerio("div.desc-text").text().trim();

        novel.author = loadedCheerio('h3:contains("Tác giả:")')
            .parent()
            .contents()
            .text()
            .replace("Tác giả:", "");

        novel.genres = loadedCheerio('h3:contains("Thể loại")')
            .siblings()
            .map((i, el) => loadedCheerio(el).text())
            .toArray()
            .join(",");

        novel.status = loadedCheerio('h3:contains("Trạng thái")').next().text();
        if(novel.status === "Full"){
            novel.status = NovelStatus.Completed;
        }else if(novel.status === 'Đang ra'){
            novel.status = NovelStatus.Ongoing;
        }else{
            novel.status = NovelStatus.Unknown;
        }
        novel.chapters = this.parseChapters(body);
        return novel;
    }
    async parsePage(novelPath: string, page: string): Promise<Plugin.SourcePage> {
        const url = `${this.site}${novelPath}?page=${page}`;
        const result = await fetch(url);
        const body = await result.text();

        const chapters = this.parseChapters(body);
        return {
            chapters
        }
    }
    async parseChapter(chapterPath: string): Promise<string> {
        const result = await fetch(this.site + chapterPath);
        const body = await result.text();

        const loadedCheerio = parseHTML(body);

        let chapterText = (loadedCheerio(".chapter-title").html() || '') + (loadedCheerio('#chapter-c').html() || '');

        return chapterText;
    }
    async searchNovels(searchTerm: string, pageNo: number): Promise<Plugin.NovelItem[]> {
        const searchUrl = `${this.site}/tim-kiem?tukhoa=${searchTerm}&page=${pageNo}`;

        const result = await fetch(searchUrl);
        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 TruyenFull();