const Faker = require('faker');
  const Fs = require('fs');
  const range = (start, end) => new Array(end - start).fill(start).map((el, i) => start + i);
  const randomInt  = (max) => Math.floor(Math.random() * max) + 1;
  const randomArray = (arr, n) => {
    let result = new Array(n);
    let len = arr.length;
    let taken = new Array(len);
  
    if (n > len) {
      throw new RangeError('getRandom: more elements taken than available');
    }
  
    while (n--) {
      let x = Math.floor(Math.random() * len);
      result[n] = arr[x in taken ? taken[x] : x];
      taken[x] = --len in taken ? taken[len] : len;
    }
    return result;
  };
  
  const users = JSON.parse(Fs.readFileSync('./static/data/user.json', 'UTF-8'));
  const uids = [];
  users.forEach((item) => {
    uids.push(item.uuid);
  });
  const chatGroup = range(0, 10).map(() => {
    return {
      'uuid': Faker.random.uuid(),
      'title': Faker.lorem.word(),
      'users': randomArray(uids, Faker.random.number({ min: 1, max: 3 })),
      'created_by': Faker.random.arrayElement(uids),
      'created_at': Faker.date.recent(),
   
    };
  });
  
  
  
  module.exports = () => {
    return {
      data: chatGroup
    };
  };