const mRandSeed = 1234;

const createRandomizer = () => {
  const randomizer = {
    seed: mRandSeed,

    arrayShuffle(options: { arr: number[]; sampleSize: number }) {
      const { arr, sampleSize } = options;

      for (let i = 0; i < sampleSize; i++) {
        this.seed = (214013 * this.seed + 2531011) % (1 << 31);

        let k = (this.seed >> 16) & 0x7fff;
        k = k % arr.length;

        const tmp = arr[i];

        arr[i] = arr[k];
        arr[k] = tmp;
      }
    },

    nextInt(maxValue: number) {
      this.seed = (214013 * this.seed + 2531011) % (1 << 31);

      let k = (this.seed >> 16) & 0x7fff;
      k = k % maxValue;

      return k;
    },
  };

  return randomizer;
};

export default createRandomizer;