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
  };
};