class ZeroChan {
    baseUrl = "https://zerochan.net";

    constructor() {
        this.type = "image-board";
        this.version = "1.0"
    }

    async search(query = "thighs", page = 1, perPage = 48) {
        const url = `${this.baseUrl}/${query.trim().replace(/\s+/g, "+")}?p=${page}`;

        const { result } = await this.scrape(
            url,
            async (page) => {
                return page.evaluate(() => {
                    const list = document.querySelectorAll("#thumbs2 li");
                    if (list.length === 0) {
                        return {results: [], hasNextPage: false};
                    }

                    const results = [];

                    list.forEach(li => {
                        const id = li.getAttribute("data-id");
                        if (!id) return;

                        const img = li.querySelector("img");
                        const imgUrl =
                            img?.getAttribute("data-src") ||
                            img?.getAttribute("src") ||
                            null;

                        if (!imgUrl) return;

                        const tagLinks = li.querySelectorAll("p a");
                        const tags = [...tagLinks]
                            .map(a => a.textContent.trim())
                            .filter(Boolean);

                        results.push({
                            id,
                            image: imgUrl,
                            tags,
                        });
                    });

                    const hasNextPage =
                        document.querySelector('nav.pagination a[rel="next"]') !== null;

                    return {results, hasNextPage};
                });
            },
            {
                waitSelector: "#thumbs2 li",
                timeout: 15000,
                renderWaitTime: 3000,
                loadImages: true
            }
        );

        return {
            results: result.results.map(r => ({
                id: r.id,
                image: r.image,
                tags: r.tags
            })),
            hasNextPage: result.hasNextPage,
            page
        };

    }

    async getInfo(id) {
        const url = `${this.baseUrl}/${id}`;

        const { result } = await this.scrape(
            url,
            async (page) => {
                return page.evaluate(() => {
                    const preview = document.querySelector("a.preview");
                    if (!preview) {
                        return {
                            fullImage: null,
                            tags: [],
                            createdAt: Date.now()
                        };
                    }

                    const fullImage = preview.getAttribute("href") || null;
                    const img = preview.querySelector("img");
                    const alt = img?.getAttribute("alt") || "";

                    let tags = [];
                    if (alt.startsWith("Tags:")) {
                        tags = alt
                            .replace("Tags:", "")
                            .split(",")
                            .map(t => t.trim())
                            .filter(Boolean);
                    }

                    return {
                        fullImage,
                        tags,
                        createdAt: Date.now()
                    };
                });
            },
            { waitSelector: "a.preview img", timeout: 15000 }
        );

        return {
            id,
            image: result.fullImage,
            tags: result.tags
        };
    }
}

module.exports = ZeroChan;