const crypto = require('crypto');

const Glib = require('../glib');

Object.defineProperty(String.prototype, 'lengthN', {
  enumerable: false,
  configurable: false,
  get() {
    return BigInt(this.length);
  },
});

Object.defineProperty(String.prototype, 'glib', {
  enumerable: false,
  configurable: false,
  get() {
    return Glib.fromIterable(this);
  },
});

Object.defineProperty(String.prototype, 'md5', {
  enumerable: false,
  configurable: false,
  get() {
    return crypto
      .createHash('md5')
      .update(this.valueOf())
      .digest('hex');
  },
});

Object.defineProperty(String.prototype, 'characterFrequencies', {
  enumerable: false,
  configurable: false,
  get() {
    const frequency = new Map();
    for (const letter of this) {
      frequency.set(letter, (frequency.get(letter) || BigInt(0)) + BigInt(1));
    }
    return frequency;
  },
});

String.prototype.splice = function(...args) {
  const characterArray = this.valueOf().split('');
  characterArray.splice(...args);
  return characterArray.join('');
};