var isFunction = require('../base/isFunction')
var eqNull = require('../base/eqNull')
var get = require('../base/get')

var arrayEach = require('../array/arrayEach')

function helperCreateMinMax (handle) {
  return function (arr, iterate) {
    if (arr && arr.length) {
      var rest, itemIndex
      arrayEach(arr, function (itemVal, index) {
        if (iterate) {
          itemVal = isFunction(iterate) ? iterate(itemVal, index, arr) : get(itemVal, iterate)
        }
        if (!eqNull(itemVal) && (eqNull(rest) || handle(rest, itemVal))) {
          itemIndex = index
          rest = itemVal
        }
      })
      return arr[itemIndex]
    }
    return rest
  }
}

module.exports = helperCreateMinMax