class wattpad {
    constructor(fetchPath, cheerioPath, browser) {
        this.browser = browser;
        this.fetch = require(fetchPath);
        this.cheerio = require(cheerioPath);
        this.baseUrl = "https://wattpad.com";
        this.type = "book-board";
    }

    async fetchSearchResult(query = "", page = 1) {
        if (!query || query.trim() === "") {
            const res = await this.fetch("https://www.wattpad.com/");
            const html = await res.text();
            const $ = this.cheerio.load(html);

            const results = [];

            $("li.splide__slide").each((_, el) => {
                const li = $(el);

                const link = li.find("a[data-testid='coverLink']").attr("href") || "";
                const img = li.find("img[data-testid='image']").attr("src") || "";
                const title = li.find("img[data-testid='image']").attr("alt") || "";

                if (link && img) {
                    const id = link.split("/story/")[1]?.split(/[^0-9]/)[0] || null;

                    if (id) {
                        results.push({
                            id,
                            title,
                            image: img,
                            sampleImageUrl: img,
                            tags: [],
                            type: "book"
                        });
                    }
                }
            });

            return {
                results,
                hasNextPage: false,
                page: 1
            };
        }

        const limit = 15;
        const offset = (page - 1) * limit;

        const url = `${this.baseUrl}/v4/search/stories?query=${query}&fields=stories%28id%2Ctitle%2CvoteCount%2CreadCount%2CcommentCount%2Cdescription%2Ccompleted%2Cmature%2Ccover%2Curl%2CisPaywalled%2CpaidModel%2Clength%2Clanguage%28id%29%2Cuser%28name%29%2CnumParts%2ClastPublishedPart%28createDate%29%2Cpromoted%2Csponsor%28name%2Cavatar%29%2Ctags%2Ctracking%28clickUrl%2CimpressionUrl%2CthirdParty%28impressionUrls%2CclickUrls%29%29%2Ccontest%28endDate%2CctaLabel%2CctaURL%29%29%2Ctotal%2Ctags%2Cnexturl&limit=${limit}&mature=false&offset=${offset}`;

        const res = await this.fetch(url);
        const json = await res.json();

        const results = json.stories.map(n => ({
            id: n.id,
            title: n.title,
            image: n.cover,
            sampleImageUrl: n.cover,
            tags: n.tags,
            type: "book"
        }));

        const totalPages = Math.ceil(json.total / limit);
        const hasNextPage = page < totalPages;

        return {
            results,
            hasNextPage,
            page
        };
    }

    async findChapters(bookId) {
        const res = await this.fetch(`${this.baseUrl}/story/${bookId}`);
        const html = await res.text();
        const $ = this.cheerio.load(html);

        const chapters = [];

        $('div.Y26Ib ul[aria-label="story-parts"] li a').each((i, el) => {
            const href = $(el).attr("href") || "";
            const match = href.match(/wattpad\.com\/(\d+)/);
            const id = match ? match[1] : null;

            const titleText = $(el).find('div.wpYp-').text().trim();

            let chapterNumber = i + 1;
            let title = titleText;

            const match2 = titleText.match(/^(\d+)\s*-\s*(.*)$/);
            if (match2) {
                chapterNumber = parseInt(match[1], 10);
                title = match2[2].trim();
            }

            chapters.push({
                id: id,
                title,
                chapter: chapterNumber,
                language: "en"
            });
        });

        return { chapters };
    }

    async findChapterPages(chapterId) {
        const ampUrl = `https://www.wattpad.com/amp/${chapterId}`;
        const res = await this.fetch(ampUrl);
        const html = await res.text();

        const $ = this.cheerio.load(html);

        const title = $("#amp-reading h2").first().text().trim();
        const titleHtml = title ? `<h1>${title}</h1>\n\n` : "";

        const paragraphsHtml = [];

        $(".story-body-type p").each((i, el) => {
            const p = $(el);

            if (p.attr("data-media-type") !== "image") {
                let h = p.html() || "";
                h = h
                    .replace(/<br\s*\/?>/gi, "<br>")
                    .replace(/\u00A0/g, " ")
                    .replace(/[ \t]+/g, " ")
                    .trim();

                if (h.length > 0) {
                    paragraphsHtml.push(`<p>${h}</p>`);
                }
                return;
            }

            const ampImg = p.find("amp-img").first();

            if (ampImg.length) {
                const src = ampImg.attr("src") || "";
                const width = ampImg.attr("width") || "";
                const height = ampImg.attr("height") || "";

                if (src) {
                    paragraphsHtml.push(
                        `<img src="${src}" width="${width}" height="${height}">`
                    );
                }
            }
        });
        const cleanHTML = titleHtml + paragraphsHtml.join("\n\n");

        return [
            {
                type: "text",
                content: cleanHTML.trim(),
                index: 0
            }
        ];
    }
}

module.exports = { novelupdates: wattpad };