import {
  isDevelopment,
  isTest,
} from './environment';

// taken straight from https://github.com/substack/deep-freeze to avoid import hassles with rollup
function deepFreeze (o: any) {
  Object.freeze(o);

  Object.getOwnPropertyNames(o).forEach(function (prop) {
    if (o.hasOwnProperty(prop)
    && o[prop] !== null
    && (typeof o[prop] === 'object' || typeof o[prop] === 'function')
    && !Object.isFrozen(o[prop])) {
      deepFreeze(o[prop]);
    }
  });

  return o;
};

export default function maybeDeepFreeze(obj: any) {
  if (isDevelopment() || isTest()) {
    return deepFreeze(obj);
  }
  return obj;
}