import { readdirSync, readFileSync } from 'node:fs';
import { resolve, relative } from 'node:path';
import { fileURLToPath } from 'node:url';

const root = fileURLToPath(new URL('../', import.meta.url));
function sources(dir, extension) {
  return readdirSync(resolve(root, dir), { withFileTypes: true }).flatMap((entry) => {
    const path = `${dir}/${entry.name}`;
    return entry.isDirectory() ? sources(path, extension) : path.endsWith(extension) ? [path] : [];
  });
}

// Check the boundaries introduced by the refactor. Existing query projections and
// composition roots are deliberately outside these use-case-specific rules.
const rules = [
  {
    files: sources('packages/core/src', '.ts'),
    forbidden: /(?:from\s*|import\s*)['"](?:[^'"]*apps\/|(?:@react-native[^'"]*|react(?:-native)?(?:[-\/]|['"]))|expo(?:[-\/]|['"])|\.\.[^'"]*(?:web|mobile|desktop)\/)/,
    message: 'core must not import platform/UI implementations',
  },
  {
    files: ['service.go', 'worker.go', 'placement.go', 'batch.go'].map((p) => `services/api/internal/uploads/${p}`),
    forbidden: /github\.com\/jackc\/pgx|\.store\.pool\b|\b(?:tx|pool)\.(?:Exec|Query|QueryRow)\(/,
    message: 'upload SQL and pgx belong in store/persistence adapters',
  },
  {
    files: sources('apps/web/src/features/uploads', '.tsx').filter((p) => !p.endsWith('/common.tsx')),
    forbidden: /\b(?:session|client)\.(?:GET|POST|PUT|PATCH|DELETE)\(/,
    message: 'upload views must use feature API/queries',
  },
];

const errors = [];
for (const rule of rules) {
  for (const path of rule.files) {
    const text = readFileSync(resolve(root, path), 'utf8');
    text.split(/\r?\n/).forEach((line, i) => {
      if (rule.forbidden.test(line)) errors.push(`${relative(root, resolve(root, path))}:${i + 1}: ${rule.message}`);
    });
  }
}
if (errors.length) {
  console.error(errors.join('\n'));
  process.exitCode = 1;
} else {
  console.log('Module boundary checks passed.');
}