newbymikhail/dist/games/balance.js

brain-games project for student

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _hexletPairs = require('hexlet-pairs');

var _game = require('../game');

var _game2 = _interopRequireDefault(_game);

var _utils = require('../utils');

var _utils2 = _interopRequireDefault(_utils);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var descriptionGame = 'Balance the given number.';
var max = 5000;

var sumDigits = function sumDigits(number) {
  var result = String(number).split('').map(Number).reduce(function (a, b) {
    return a + b;
  }, 0);
  return result;
};

var concat = function concat(emptyString, num, count) {
  var str = emptyString;

  if (count > 0) {
    str += num;
    return concat(str, num, count - 1);
  }

  return str;
};

var getBalance = function getBalance(number) {
  var countDigits = String(number).length;
  var sum = sumDigits(number);

  if (sum % countDigits === 0) return concat('', sum / countDigits, countDigits);

  var number1 = Math.floor(sum / countDigits);
  var number2 = number1 + 1;
  var a = void 0;

  for (var i = 1; i < countDigits; i += 1) {
    a = concat('', number1, countDigits - i) + concat('', number2, i);
    if (sumDigits(Number(a)) === sum) return a;
  }

  return a;
};

var questionAndAnswer = function questionAndAnswer() {
  var number = (0, _utils2.default)(max);
  var question = 'Question: ' + number;
  var answer = getBalance(number);
  return (0, _hexletPairs.cons)(question, '' + answer);
};

exports.default = function () {
  return (0, _game2.default)(descriptionGame, questionAndAnswer);
};
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