#!/usr/bin/env node
/**
 * Vendor the original webview verbatim into ./original.
 *
 * Source: the extracted ChatGPT.app/Contents/Resources/app.asar, i.e.
 *   <extracted-asar>/webview
 *
 * Nothing is rewritten. The copy is byte-for-byte identical, which is what makes
 * the UI 100% the original rather than an approximation.
 *
 * Usage:
 *   node host/vendor-original.mjs --from /tmp/codex-asar/webview
 *   node host/vendor-original.mjs --from /path/to/webview --clean
 */
import fs from "node:fs";
import path from "node:path";
import crypto from "node:crypto";
import { fileURLToPath } from "node:url";

const __dirname = path.dirname(fileURLToPath(import.meta.url));
const projectRoot = path.resolve(__dirname, "..");

const args = process.argv.slice(2);
const getArg = (name, fallback) => {
  const i = args.indexOf(name);
  return i >= 0 && args[i + 1] ? args[i + 1] : fallback;
};

const from = path.resolve(getArg("--from", "/tmp/codex-asar/webview"));
const to = path.resolve(projectRoot, getArg("--to", "original"));
const clean = args.includes("--clean");

if (!fs.existsSync(path.join(from, "index.html"))) {
  console.error(`[vendor] not a webview directory: ${from}`);
  process.exit(1);
}

if (clean && fs.existsSync(to)) {
  console.log(`[vendor] removing ${to}`);
  fs.rmSync(to, { recursive: true, force: true });
}
fs.mkdirSync(to, { recursive: true });

console.log(`[vendor] copying ${from} -> ${to}`);
fs.cpSync(from, to, { recursive: true, force: true });

// Manifest (written outside ./original so the vendored tree stays untouched).
function sha256(file) {
  return crypto.createHash("sha256").update(fs.readFileSync(file)).digest("hex");
}
function countFiles(dir) {
  let n = 0;
  for (const entry of fs.readdirSync(dir, { withFileTypes: true })) {
    n += entry.isDirectory() ? countFiles(path.join(dir, entry.name)) : 1;
  }
  return n;
}

const manifest = {
  source: from,
  vendoredAt: new Date().toISOString(),
  fileCount: countFiles(to),
  indexHtmlSha256: sha256(path.join(to, "index.html")),
};
fs.writeFileSync(
  path.join(projectRoot, "host", "vendor-manifest.json"),
  JSON.stringify(manifest, null, 2),
);

console.log(`[vendor] done — ${manifest.fileCount} files`);
console.log(`[vendor] index.html sha256 ${manifest.indexHtmlSha256}`);