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

baseIndexOf = require('./_baseIndexOf'),
baseIndexOfWith = require('./_baseIndexOfWith'),
baseUnary = require('./_baseUnary'),
copyArray = require('./_copyArray');

/** Used for built-in method references. */ var arrayProto = Array.prototype;

/** Built-in value references. */ var splice = arrayProto.splice;

/**

* The base implementation of `_.pullAllBy` without support for iteratee
* shorthands.
*
* @private
* @param {Array} array The array to modify.
* @param {Array} values The values to remove.
* @param {Function} [iteratee] The iteratee invoked per element.
* @param {Function} [comparator] The comparator invoked per element.
* @returns {Array} Returns `array`.
*/

function basePullAll(array, values, iteratee, comparator) {

var indexOf = comparator ? baseIndexOfWith : baseIndexOf,
    index = -1,
    length = values.length,
    seen = array;

if (array === values) {
  values = copyArray(values);
}
if (iteratee) {
  seen = arrayMap(array, baseUnary(iteratee));
}
while (++index < length) {
  var fromIndex = 0,
      value = values[index],
      computed = iteratee ? iteratee(value) : value;

  while ((fromIndex = indexOf(seen, computed, fromIndex, comparator)) > -1) {
    if (seen !== array) {
      splice.call(seen, fromIndex, 1);
    }
    splice.call(array, fromIndex, 1);
  }
}
return array;

}

module.exports = basePullAll;