// Interop-Test v2: lädt EXAKT den Core aus der ausgelieferten index.html und
// prüft Byte-Kompatibilität mit dem Python-CLI (richtungsgetrennte Schlüssel).
import { readFileSync, writeFileSync } from 'node:fs';

const U = (p) => new Uint8Array(readFileSync(new URL(p, import.meta.url)));
const html = readFileSync(new URL('./index.html', import.meta.url), 'utf8');
const core = html.match(/==CORE START==.*?\*\/([\s\S]*?)\/\*\s*==CORE END==/)[1];
new Function(core)();
const SP = globalThis.SP;

let fails = 0;
const ok = (c, m) => { console.log((c ? '  ✓ ' : '  ✗ ') + m); if (!c) fails++; };

// A: CLI (send.key) -> Web-Core (recv.key)
{
  const rgb = U('./_a_rgb.bin');
  const recv = SP.parseKey(U('../t2/rel_partner_seite/recv.key'));
  const info = SP.extract(rgb);
  const plain = SP.otpXor(info.ciphertext, recv.material, info.offset);
  const text = new TextDecoder().decode(plain);
  console.log('A) CLI → Web');
  ok(SP.sameStream(info.streamId, recv.streamId), 'stream_id passt zum recv.key');
  ok(text === 'MsgA vom CLI 🕵️', 'Klartext: ' + JSON.stringify(text));
}

// B: Web-Core (send.key) -> CLI (recv.key)
{
  const rgb = U('./_b_rgb.bin');
  const send = SP.parseKey(U('../t2/rel_partner_seite/send.key'));
  const msg = 'MsgB aus dem Browser-Core 🌐';
  ok(send.role === SP.ROLE_SEND, 'partner send.key hat Rolle SEND');
  const plain = new TextEncoder().encode(msg);
  const ct = SP.otpXor(plain, send.material, send.sendOffset);
  const payload = SP.buildStego(send.streamId, send.sendOffset, ct);
  SP.embed(rgb, payload);
  writeFileSync(new URL('./_b_out_rgb.bin', import.meta.url), rgb);
  console.log('B) Web → CLI');
  ok(true, `eingebettet (${plain.length} B ab Offset ${send.sendOffset}) → _b_out_rgb.bin`);
}

process.exit(fails ? 1 : 0);