'use strict';

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

var _isIterateeCall = require('./_isIterateeCall.js');
var _baseRest = require('./_baseRest.js');
var _baseFlatten = require('./_baseFlatten.js');
var _baseOrderBy = require('./_baseOrderBy.js');

/**
 * Creates an array of elements, sorted in ascending order by the results of
 * running each element in a collection thru each iteratee. This method
 * performs a stable sort, that is, it preserves the original sort order of
 * equal elements. The iteratees are invoked with one argument: (value).
 *
 * @static
 * @memberOf _
 * @since 0.1.0
 * @category Collection
 * @param {Array|Object} collection The collection to iterate over.
 * @param {...(Function|Function[])} [iteratees=[_.identity]]
 *  The iteratees to sort by.
 * @returns {Array} Returns the new sorted array.
 * @example
 *
 * var users = [
 *   { 'user': 'fred',   'age': 48 },
 *   { 'user': 'barney', 'age': 36 },
 *   { 'user': 'fred',   'age': 40 },
 *   { 'user': 'barney', 'age': 34 }
 * ];
 *
 * _.sortBy(users, [function(o) { return o.user; }]);
 * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]
 *
 * _.sortBy(users, ['user', 'age']);
 * // => objects for [['barney', 34], ['barney', 36], ['fred', 40], ['fred', 48]]
 */
var sortBy = _baseRest.default(function(collection, iteratees) {
  if (collection == null) {
    return [];
  }
  var length = iteratees.length;
  if (length > 1 && _isIterateeCall.default(collection, iteratees[0], iteratees[1])) {
    iteratees = [];
  } else if (length > 2 && _isIterateeCall.default(iteratees[0], iteratees[1], iteratees[2])) {
    iteratees = [iteratees[0]];
  }
  return _baseOrderBy.default(collection, _baseFlatten.default(iteratees, 1), []);
});

var sortBy_1 = sortBy;

exports.__moduleExports = sortBy_1;
exports.default = sortBy_1;
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