var apply = require('./_apply'),

arrayPush = require('./_arrayPush'),
baseRest = require('./_baseRest'),
castSlice = require('./_castSlice'),
toInteger = require('./toInteger');

/** Error message constants. */ var FUNC_ERROR_TEXT = 'Expected a function';

/* Built-in method references for those with the same name as other `lodash` methods. */ var nativeMax = Math.max;

/**

* Creates a function that invokes `func` with the `this` binding of the
* create function and an array of arguments much like
* [`Function#apply`](http://www.ecma-international.org/ecma-262/7.0/#sec-function.prototype.apply).
*
* **Note:** This method is based on the
* [spread operator](https://mdn.io/spread_operator).
*
* @static
* @memberOf _
* @since 3.2.0
* @category Function
* @param {Function} func The function to spread arguments over.
* @param {number} [start=0] The start position of the spread.
* @returns {Function} Returns the new function.
* @example
*
* var say = _.spread(function(who, what) {
*   return who + ' says ' + what;
* });
*
* say(['fred', 'hello']);
* // => 'fred says hello'
*
* var numbers = Promise.all([
*   Promise.resolve(40),
*   Promise.resolve(36)
* ]);
*
* numbers.then(_.spread(function(x, y) {
*   return x + y;
* }));
* // => a Promise of 76
*/

function spread(func, start) {

if (typeof func != 'function') {
  throw new TypeError(FUNC_ERROR_TEXT);
}
start = start == null ? 0 : nativeMax(toInteger(start), 0);
return baseRest(function(args) {
  var array = args[start],
      otherArgs = castSlice(args, 0, start);

  if (array) {
    arrayPush(otherArgs, array);
  }
  return apply(func, this, otherArgs);
});

}

module.exports = spread;