import test from 'node:test';
import assert from 'node:assert/strict';
import { readFileSync } from 'node:fs';

const root = new URL('../', import.meta.url);
const readProjectFile = (name) => readFileSync(new URL(name, root), 'utf8');

test('the playable shell uses a local canvas entry point and no external runtime assets', () => {
  const html = readProjectFile('index.html');

  assert.match(html, /<canvas[^>]+id="relay-canvas"/);
  assert.match(html, /<script\s+type="module"\s+src="\.\/app\.js"><\/script>/);
  assert.match(html, /data-action="anchor"/);
  assert.doesNotMatch(html, /<(?:script|link|img)\b[^>]+(?:src|href)\s*=\s*["']https?:\/\//i);
});

test('the runtime exposes a narrow smoke-test surface without network calls', () => {
  const app = readProjectFile('app.js');

  assert.match(app, /window\.__VANTA_TEST__/);
  assert.doesNotMatch(app, /\bfetch\s*\(|XMLHttpRequest|WebSocket/);
});