// Step 6 test — the harness is the test surface: it must PASS a clean extract, FAIL one with a
// planted tracked state file, and use the glob test form (never a bare dir). Pattern:
// plugins/voyage/tests/synthetic/*.test.mjs.
import test from 'node:test';
import assert from 'node:assert/strict';
import { spawnSync } from 'node:child_process';
import { mkdtempSync, rmSync, cpSync, writeFileSync, readFileSync } from 'node:fs';
import os from 'node:os';
import path from 'node:path';
import { fileURLToPath } from 'node:url';

const here = path.dirname(fileURLToPath(import.meta.url));
const SCRIPT = path.join(here, '40-validate-standalone.sh');
const WORK = process.env.WORK || '/tmp/polyrepo-migration';

function harness(key, work) {
  // Strip the parent test-runner context so the harness's own `node --test` runs un-nested
  // (otherwise Node emits its IPC subtest format and the test-count label is suppressed).
  const env = { ...process.env, WORK: work };
  delete env.NODE_TEST_CONTEXT;
  return spawnSync('bash', [SCRIPT, key], { encoding: 'utf8', env });
}
const git = (dir, args) => spawnSync('git', ['-C', dir, ...args], { encoding: 'utf8' });

test('harness PASSes a clean standalone extract (graceful-handoff)', () => {
  const r = harness('graceful-handoff', WORK);
  assert.equal(r.status, 0, `expected PASS exit 0:\n${r.stdout}\n${r.stderr}`);
  assert.match(r.stdout, /graceful-handoff: PASS \(.*standalone-safe\)/);
});

test('harness FAILs an extract with a planted tracked state file (SC7)', () => {
  const tmpWork = mkdtempSync(path.join(os.tmpdir(), 'validate-broken-'));
  try {
    const broken = path.join(tmpWork, 'graceful-handoff');
    cpSync(path.join(WORK, 'graceful-handoff'), broken, { recursive: true });
    writeFileSync(path.join(broken, 'STATE.md'), '# planted tracked state file\n');
    assert.equal(git(broken, ['add', '-f', 'STATE.md']).status, 0);
    assert.equal(git(broken, ['commit', '-m', 'plant tracked STATE.md', '-q']).status, 0);

    const r = harness('graceful-handoff', tmpWork);
    assert.notEqual(r.status, 0, `expected FAIL (non-zero), got 0:\n${r.stdout}`);
    assert.match(r.stdout, /graceful-handoff: FAIL/);
    assert.match(r.stdout, /state-file leak/);
  } finally {
    rmSync(tmpWork, { recursive: true, force: true });
  }
});

test('harness uses the glob test form, never a bare dir (Node 25 gotcha)', () => {
  const src = readFileSync(SCRIPT, 'utf8');
  assert.ok(src.includes('*.test.mjs'), 'harness must reference the glob test form *.test.mjs');
});