var arrayMap = require('./_arrayMap'),

baseIteratee = require('./_baseIteratee'),
baseMap = require('./_baseMap'),
baseSortBy = require('./_baseSortBy'),
baseUnary = require('./_baseUnary'),
compareMultiple = require('./_compareMultiple'),
identity = require('./identity');

/**

* The base implementation of `_.orderBy` without param guards.
*
* @private
* @param {Array|Object} collection The collection to iterate over.
* @param {Function[]|Object[]|string[]} iteratees The iteratees to sort by.
* @param {string[]} orders The sort orders of `iteratees`.
* @returns {Array} Returns the new sorted array.
*/

function baseOrderBy(collection, iteratees, orders) {

var index = -1;
iteratees = arrayMap(iteratees.length ? iteratees : [identity], baseUnary(baseIteratee));

var result = baseMap(collection, function(value, key, collection) {
  var criteria = arrayMap(iteratees, function(iteratee) {
    return iteratee(value);
  });
  return { 'criteria': criteria, 'index': ++index, 'value': value };
});

return baseSortBy(result, function(object, other) {
  return compareMultiple(object, other, orders);
});

}

module.exports = baseOrderBy;