import crypto = require('crypto');

export class Random {
  static randomString(length = 6): string {
    return crypto.randomBytes(length).toString('hex').slice(0, length);
  }

  static getRandomValueFromArray<T>(array: T[]): T {
    const randomArrayIndex = Math.floor(Math.random() * array.length);
    return array[randomArrayIndex];
  }

  static getTwoUniqueRandomValueFromArray<T>(array: T[]): [T, T] {
    const firstLocation = this.getRandomValueFromArray(array);
    let secondLocation = this.getRandomValueFromArray(array);
    while (firstLocation === secondLocation) {
      secondLocation = this.getRandomValueFromArray(array);
    }
    return [firstLocation, secondLocation];
  }

  static getRandomValueFrom2DArray<T>(array: T[][]): T[] {
    const randomArrayIndex = Math.floor(Math.random() * array.length);
    return array[randomArrayIndex];
  }
}