/**
 * llmindex.io — CI check: mandatory author header on all source files (§4)
 * Author:  Simon-Pierre Boucher
 * Contact: contact@spboucher.ai
 * License: Proprietary — © Simon-Pierre Boucher, all rights reserved
 */
import { readFileSync, readdirSync, statSync } from 'node:fs';
import { join, extname } from 'node:path';

const ROOT = new URL('..', import.meta.url).pathname;
const SCAN_DIRS = ['apps', 'packages', 'infra'];
const EXTENSIONS = new Set(['.ts', '.tsx', '.py', '.sh', '.sql', '.mjs', '.cjs']);
const EXCLUDED_DIRS = new Set([
  'node_modules', '.next', 'dist', '.turbo', '__pycache__', '.venv', '.pytest_cache',
  'migrations', 'playwright-report', 'test-results', 'generated',
]);
const EXCLUDED_FILES = new Set(['next-env.d.ts']);
const REQUIRED = ['Author:  Simon-Pierre Boucher', 'contact@spboucher.ai'];

function* walk(dir) {
  for (const entry of readdirSync(dir)) {
    const full = join(dir, entry);
    const st = statSync(full);
    if (st.isDirectory()) {
      if (!EXCLUDED_DIRS.has(entry)) yield* walk(full);
    } else if (EXTENSIONS.has(extname(entry)) && !EXCLUDED_FILES.has(entry)) {
      yield full;
    }
  }
}

const failures = [];
for (const dir of SCAN_DIRS) {
  for (const file of walk(join(ROOT, dir))) {
    const head = readFileSync(file, 'utf8').slice(0, 600);
    if (!REQUIRED.every((needle) => head.includes(needle))) {
      failures.push(file.replace(ROOT, ''));
    }
  }
}

if (failures.length > 0) {
  console.error(`✗ ${failures.length} file(s) missing the mandatory author header:`);
  for (const f of failures) console.error(`  - ${f}`);
  process.exit(1);
}
console.log('✓ all source files carry the author header');