// Plan 017 harness check: device A holds a file; device B downloads it over WebRTC.
import { chromium } from 'playwright';
const b = await chromium.launch({
  executablePath: process.env.CHROMIUM || '/opt/pw-browsers/chromium-1194/chrome-linux/chrome',
  args: ['--disable-features=WebRtcHideLocalIpsWithMdns'],
});
const pages = [];
for (let i = 0; i < 2; i++) { const ctx = await b.newContext(); const p = await ctx.newPage(); p.on('console', (m) => { if (m.type() === 'error') console.log('console', i, m.text()); }); await p.goto('http://localhost:8770/'); pages.push(p); }
const setup = (p) => p.evaluate(async () => {
  P2PClient.start({ getSettings: () => ({}) });
  await P2PClient.sync();
  for (let i = 0; i < 50 && !P2PClient.isConnected(); i++) await new Promise((r) => setTimeout(r, 100));
  P2PTransfer.start({ iceServers: [] });
  return P2PClient.peer();
});
// Holder: write a 5 MB file + registry record.
const held = await pages[0].evaluate(async () => {
  const bytes = new Uint8Array(5 * 1024 * 1024 + 777).map((_, i) => (i * 31 + 7) % 256);
  const dir = await (await navigator.storage.getDirectory()).getDirectoryHandle('videos', { create: true });
  const w = await (await dir.getFileHandle('heldAAAAAAA.mp4', { create: true })).createWritable();
  await w.write(bytes); await w.close();
  const cid = Sha256.hex(bytes);
  await DeviceDB.putFile({ videoId: 'heldAAAAAAA', cid, size: bytes.length, state: 'verified' });
  return { cid, size: bytes.length };
});
const peerA = await setup(pages[0]);
await setup(pages[1]);
const t0 = Date.now();
const res = await pages[1].evaluate(async ({ peerA, held }) => {
  const good = await P2PTransfer.download({ videoId: 'gotAAAAAAAA', cid: held.cid, size: held.size, peers: [{ peer: peerA }] });
  const list = (await OPFS.listVideos()).map((x) => [x.id, x.size]);
  const bad = await P2PTransfer.download({ videoId: 'badAAAAAAAA', cid: 'f'.repeat(64), size: held.size, peers: [{ peer: peerA }] });
  const list2 = (await OPFS.listVideos()).map((x) => x.id);
  return { good, list, bad, list2 };
}, { peerA, held });
// Holder's file gets corrupted (same size, one byte flipped) but its record still claims the cid.
await pages[0].evaluate(async () => {
  const dir = await (await navigator.storage.getDirectory()).getDirectoryHandle('videos');
  const fh = await dir.getFileHandle('heldAAAAAAA.mp4');
  const bytes = new Uint8Array(await (await fh.getFile()).arrayBuffer());
  bytes[12345] ^= 0xff;
  const w = await fh.createWritable(); await w.write(bytes); await w.close();
});
res.corrupt = await pages[1].evaluate(async ({ peerA, held }) => {
  const r = await P2PTransfer.download({ videoId: 'corAAAAAAAA', cid: held.cid, size: held.size, peers: [{ peer: peerA }] });
  await new Promise((x) => setTimeout(x, 300));
  const names = [];
  for await (const [n] of (await (await navigator.storage.getDirectory()).getDirectoryHandle('videos')).entries()) names.push(n);
  return { r, names: names.sort() };
}, { peerA, held });
console.log(JSON.stringify({ ...res, ms: Date.now() - t0 }));
await b.close();