import { Router } from 'express';
import fs from 'fs';
import path from 'path';
import { ROOT } from '../rootDir';

const router = Router();
const LOCALES_DIR = path.join( ROOT, 'source', 'locale-data' );

router.get('/:locale/*', (req, res) => {
  const locale = req.params.locale;
  const filePath = (req.params as Record<string, string>)[0];
  const abs = path.resolve(path.join(LOCALES_DIR, locale, filePath));
  if (!abs.startsWith(path.resolve(LOCALES_DIR) + path.sep)) {
    res.status(403).json({ error: 'Forbidden' });
    return;
  }
  if (!fs.existsSync(abs)) {
    res.status(404).json({ error: 'Not found' });
    return;
  }
  const ext = path.extname(abs).slice(1);
  if (ext === 'html') res.type('text/html').send(fs.readFileSync(abs, 'utf8'));
  else if (ext === 'json') res.json(JSON.parse(fs.readFileSync(abs, 'utf8')));
  else res.type('text/plain').send(fs.readFileSync(abs, 'utf8'));
});

export default router;