const fs = require('fs');
const path = require('path');
const vm = require('vm');

const localeDir = path.join(__dirname, '..', 'webapp', 'src', 'lib', 'i18n', 'locales');

function readLocale(fileName, variableName) {
  let code = fs.readFileSync(path.join(localeDir, fileName), 'utf8');
  code = code
    .replace(/const (\w+): Record<string, string> =/g, 'const $1 =')
    .replace(/export default \w+;\s*$/m, '');
  code += `\nresult = ${variableName};`;
  const sandbox = { result: null };
  vm.createContext(sandbox);
  vm.runInContext(code, sandbox, { filename: fileName });
  return sandbox.result;
}

function writeLocale(fileName, variableName, table, header) {
  const body = JSON.stringify(table, null, 2);
  fs.writeFileSync(
    path.join(localeDir, fileName),
    `${header}\nconst ${variableName}: Record<string, string> = ${body};\n\nexport default ${variableName};\n`,
    'utf8'
  );
}

module.exports = {
  localeDir,
  readLocale,
  writeLocale,
};