const fs = require("fs");const { pipeline } = require("stream/promises");const { Readable } = require("stream");const BASE = "https://snapdouyin.app";const UA = "Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36";function calculateHash(url, salt) {  return Buffer.from(url).toString("base64") + (url.length + 1000) + Buffer.from(salt).toString("base64");}function parseCookies(setCookieHeaders) {  if (!setCookieHeaders) return "";  return setCookieHeaders.map((c) => c.split(";")[0]).join("; ");}async function getSessionAndToken() {  const res = await fetch(BASE + "/", { headers: { "User-Agent": UA } });  const html = await res.text();  const setCookie = res.headers.getSetCookie ? res.headers.getSetCookie() : [];  const cookie = parseCookies(setCookie);  const match = html.match(/id="token"[^>]*value="([^"]+)"/);  if (!match) throw new Error("Token tidak ditemukan di halaman");  return { cookie, token: match[1] };}async function getVideoData(videoUrl, retries = 2) {  for (let attempt = 0; attempt <= retries; attempt++) {    try {      const { cookie: initialCookie, token } = await getSessionAndToken();      const hash = calculateHash(videoUrl, "aio-dl");      const body = new URLSearchParams();      body.append("url", videoUrl);      body.append("token", token);      body.append("hash", hash);      const res = await fetch(BASE + "/wp-json/mx-downloader/video-data/", {        method: "POST",        headers: {          "Content-Type": "application/x-www-form-urlencoded",          Origin: BASE,          Referer: BASE + "/",          Cookie: initialCookie,          "User-Agent": UA,        },        body,      });      if (!res.ok) throw new Error(`video-data gagal dengan status ${res.status}`);      const newSetCookie = res.headers.getSetCookie ? res.headers.getSetCookie() : [];      const newCookie = parseCookies(newSetCookie);      const cookie = newCookie || initialCookie;      const data = await res.json();      if (data.error) throw new Error(data.error);      data._cookie = cookie;      return data;    } catch (err) {      if (attempt === retries) throw err;    }  }}async function downloadMedia(mediaUrl, cookie, outputPath) {  const res = await fetch(mediaUrl + "&bandwidth_saving=1", {    headers: {      accept: "*/*",      "accept-language": "id-ID,id;q=0.9,en-US;q=0.8,en;q=0.7",      "sec-fetch-dest": "empty",      "sec-fetch-mode": "cors",      "sec-fetch-site": "same-origin",      Cookie: cookie,      "User-Agent": UA,    },    signal: AbortSignal.timeout(30000),  });  if (!res.ok) throw new Error(`download gagal dengan status ${res.status}`);  if (!res.body) throw new Error("Response tidak punya body");  await pipeline(Readable.fromWeb(res.body), fs.createWriteStream(outputPath));  return outputPath;}async function main() {  const url = process.argv[2];  const qualityArg = process.argv[3];  if (!url) {    console.error("Gunakan: node snapdouyin.js <url_douyin> [index_kualitas]");    process.exit(1);  }  const data = await getVideoData(url);  if (qualityArg === undefined) {    console.log(JSON.stringify(data, null, 2));    return;  }  const media = data.medias[Number(qualityArg)];  if (!media) throw new Error("Index kualitas tidak valid");  const filename = `douyin-${media.quality.replace(/\s/g, "")}-${Date.now()}.${media.extension}`;  await downloadMedia(media.url, data._cookie, filename);  console.log(JSON.stringify({    url: data.url,    title: data.title,    thumbnail: data.thumbnail,    duration: data.duration,    source: data.source,    downloaded: {      saved: filename,      quality: media.quality,      extension: media.extension,      size: media.formattedSize,    },  }, null, 2));}main().catch((err) => {  console.error("Error:", err.message);  if (err.cause) console.error("Cause:", err.cause.message || err.cause);  process.exit(1);});