/**
 * @fileoverview Serialization utils.
 * @author Bryan Mishkin
 */

'use strict';

/**
 * Check if a value is a primitive or plain object created by the Object constructor.
 * @param {any} val the value to check
 * @returns {boolean} true if so
 * @private
 */
function isSerializablePrimitiveOrPlainObject(val) {
  return (
    val === null ||
    typeof val === 'string' ||
    typeof val === 'boolean' ||
    typeof val === 'number' ||
    (typeof val === 'object' && val.constructor === Object) ||
    Array.isArray(val)
  );
}

/**
 * Check if a value is serializable.
 * Functions or objects like RegExp cannot be serialized by JSON.stringify().
 * Inspired by: https://stackoverflow.com/questions/30579940/reliable-way-to-check-if-objects-is-serializable-in-javascript
 * @param {any} val the value
 * @returns {boolean} true if the value is serializable
 */
function isSerializable(val) {
  if (!isSerializablePrimitiveOrPlainObject(val)) {
    return false;
  }
  if (typeof val === 'object') {
    for (const property in val) {
      if (Object.hasOwn(val, property)) {
        if (!isSerializablePrimitiveOrPlainObject(val[property])) {
          return false;
        }
        if (typeof val[property] === 'object') {
          if (!isSerializable(val[property])) {
            return false;
          }
        }
      }
    }
  }
  return true;
}

module.exports = {
  isSerializable,
};