// Read-only production drift probe. No authentication, writes, payments or
// provider calls are performed. It intentionally fails when a required
// deployment contract is missing.
import { mkdir, writeFile } from 'node:fs/promises';
import crypto from 'node:crypto';

const base = String(process.argv[2] || process.env.IHALEIST_LIVE_URL || 'https://ihaleist.com').replace(/\/$/, '');
const evidencePath = process.env.IHALEIST_LIVE_EVIDENCE_PATH || 'docs/quality/evidence/qa-live-runtime.json';
const timeoutMs = 15_000;
const requiredHeaders = [
  'x-content-type-options', 'referrer-policy', 'permissions-policy',
  'x-frame-options', 'content-security-policy',
  ...(base.startsWith('https://') ? ['strict-transport-security'] : []),
];
const observedHeaders = [...new Set([...requiredHeaders, 'strict-transport-security'])];
const checks = {};
const expectedRelease = String(process.env.IHALEIST_EXPECTED_RELEASE || '').trim();
const expectedAssetSha256 = String(process.env.IHALEIST_EXPECTED_ASSET_SHA256 || '').trim();

async function probe(path, successField = null, captureText = false) {
  const controller = new AbortController();
  const timer = setTimeout(() => controller.abort(), timeoutMs);
  try {
    const response = await fetch(base + path, { signal: controller.signal, redirect: 'manual' });
    const result = {
      status: response.status,
      contentType: response.headers.get('content-type'),
      headers: Object.fromEntries(observedHeaders.map(name => [name, response.headers.get(name)])),
    };
    if (successField || captureText) {
      const raw = await response.text();
      if (captureText) result.text = raw;
      if (successField) {
        try { result.json = JSON.parse(raw); } catch { result.jsonError = 'JSON yanıtı ayrıştırılamadı.'; }
        result.apiSuccess = result.json?.[successField] === true;
      }
    }
    return result;
  } catch (error) {
    return { error: error.name === 'AbortError' ? `timeout after ${timeoutMs}ms` : error.message };
  } finally {
    clearTimeout(timer);
  }
}

async function probeFrontendAsset(publicPath) {
  if (!publicPath) return { error: 'Ana sayfada Vite JavaScript asset yolu bulunamadı.' };
  const controller = new AbortController();
  const timer = setTimeout(() => controller.abort(), timeoutMs);
  try {
    const response = await fetch(new URL(publicPath, base), { signal: controller.signal, redirect: 'manual' });
    const bytes = Buffer.from(await response.arrayBuffer());
    return {
      status: response.status,
      contentType: response.headers.get('content-type'),
      headers: Object.fromEntries(observedHeaders.map(name => [name, response.headers.get(name)])),
      path: new URL(publicPath, base).pathname,
      bytes: bytes.length,
      sha256: crypto.createHash('sha256').update(bytes).digest('hex'),
    };
  } catch (error) {
    return { error: error.name === 'AbortError' ? `timeout after ${timeoutMs}ms` : error.message };
  } finally {
    clearTimeout(timer);
  }
}

checks.home = await probe('/', null, true);
const assetMatch = checks.home.text?.match(/<script[^>]+src=["']([^"']*\/assets\/[^"']+\.js(?:\?[^"']*)?)["']/i);
delete checks.home.text;
checks.health = await probe('/api/health', 'ok');
// /api/health and /api/ready use the same { ok: true } probe contract. The
// readiness payload also includes a separate `ready` diagnostic field.
checks.ready = await probe('/api/ready', 'ok');
checks.version = await probe('/api/version', 'ok');
// The EKAP document fallback depends on the bundled browser being available;
// check its public capability endpoint without opening a document or mutating
// any account data.
checks.documents = await probe('/api/documents/config', 'tarayiciVar');
checks.frontendAsset = await probeFrontendAsset(assetMatch?.[1]);
const release = checks.version?.json?.release;
const releaseValid = typeof release === 'string' && /^[a-f0-9]{7,64}$/i.test(release);
const releaseMatches = !expectedRelease || release === expectedRelease;
const reportedAsset = checks.version?.json?.frontendAsset;
const assetMatchesRuntime = Boolean(reportedAsset?.sha256)
  && reportedAsset.sha256 === checks.frontendAsset?.sha256
  && reportedAsset.path === checks.frontendAsset?.path;
const assetMatchesExpected = !expectedAssetSha256 || checks.frontendAsset?.sha256 === expectedAssetSha256;
const publicChecks = [checks.home, checks.health, checks.ready, checks.version, checks.documents, checks.frontendAsset];
const missingHeaders = requiredHeaders.filter(name => publicChecks.some(check => check?.headers?.[name] == null));
const report = {
  base,
  readOnly: true,
  checkedAt: new Date().toISOString(),
  expectedRelease: expectedRelease || null,
  expectedAssetSha256: expectedAssetSha256 || null,
  checks,
  releaseValid,
  releaseMatches,
  assetMatchesRuntime,
  assetMatchesExpected,
  pass: checks.home?.status === 200 && checks.health?.status === 200 && checks.health.apiSuccess === true && checks.ready?.status === 200 && checks.ready.apiSuccess === true && checks.version?.status === 200 && checks.version.apiSuccess === true && checks.documents?.status === 200 && checks.documents.apiSuccess === true && checks.frontendAsset?.status === 200 && releaseValid && releaseMatches && assetMatchesRuntime && assetMatchesExpected && missingHeaders.length === 0,
  missingHeaders,
};

await mkdir('docs/quality/evidence', { recursive: true });
await writeFile(evidencePath, JSON.stringify(report, null, 2) + '\n');
console.log(JSON.stringify(report));
if (!report.pass) process.exitCode = 1;