import summaly from "@iceshrimp/summaly";
import { fetchMeta } from "../../misc/fetch-meta.js";
import Logger from "../../services/logger.js";
import config from "../../config/index.js";
import { query } from "../../prelude/url.js";
import { getJson } from "../../misc/fetch.js";
const logger = new Logger("url-preview");
export const urlPreviewHandler = async (ctx)=>{
    const url = ctx.query.url;
    if (typeof url !== "string") {
        ctx.status = 400;
        return;
    }
    const lang = ctx.query.lang;
    if (Array.isArray(lang)) {
        ctx.status = 400;
        return;
    }
    const meta = await fetchMeta();
    logger.info(meta.summalyProxy ? `(Proxy) Getting preview of ${url}@${lang} ...` : `Getting preview of ${url}@${lang} ...`);
    try {
        const summary = meta.summalyProxy ? await getJson(`${meta.summalyProxy}?${query({
            url: url,
            lang: lang ?? "en-US"
        })}`) : await summaly.default(url, {
            followRedirects: false,
            lang: lang ?? "en-US",
            userAgent: config.userAgent
        });
        logger.succ(`Got preview of ${url}: ${summary.title}`);
        if (summary.url && !(summary.url.startsWith("http://") || summary.url.startsWith("https://"))) {
            throw new Error("unsupported schema included");
        }
        if (summary.player?.url && !(summary.player.url.startsWith("http://") || summary.player.url.startsWith("https://"))) {
            throw new Error("unsupported schema included");
        }
        summary.icon = wrap(summary.icon);
        summary.thumbnail = wrap(summary.thumbnail);
        // Cache 7days
        ctx.set("Cache-Control", "max-age=604800, immutable");
        ctx.body = summary;
    } catch (err) {
        logger.warn(`Failed to get preview of ${url}: ${err}`);
        ctx.status = 200;
        ctx.set("Cache-Control", "max-age=86400, immutable");
        ctx.body = "{}";
    }
};
function wrap(url) {
    return url != null ? `${config.url}/proxy/preview.webp?${query({
        url,
        preview: "1"
    })}` : null;
}