/**
 * lodash 4.2.1 (Custom Build) <https://lodash.com/>
 * Build: `lodash modularize exports="npm" -o ./`
 * Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2016 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <https://lodash.com/license>
 */
var baseFlatten = require('lodash._baseflatten'),
    baseIteratee = require('lodash._baseiteratee'),
    rest = require('lodash.rest');

/**
 * A faster alternative to `Function#apply`, this function invokes `func`
 * with the `this` binding of `thisArg` and the arguments of `args`.
 *
 * @private
 * @param {Function} func The function to invoke.
 * @param {*} thisArg The `this` binding of `func`.
 * @param {...*} args The arguments to invoke `func` with.
 * @returns {*} Returns the result of `func`.
 */
function apply(func, thisArg, args) {
  var length = args.length;
  switch (length) {
    case 0: return func.call(thisArg);
    case 1: return func.call(thisArg, args[0]);
    case 2: return func.call(thisArg, args[0], args[1]);
    case 3: return func.call(thisArg, args[0], args[1], args[2]);
  }
  return func.apply(thisArg, args);
}

/**
 * A specialized version of `_.map` for arrays without support for iteratee
 * shorthands.
 *
 * @private
 * @param {Array} array The array to iterate over.
 * @param {Function} iteratee The function invoked per iteration.
 * @returns {Array} Returns the new mapped array.
 */
function arrayMap(array, iteratee) {
  var index = -1,
      length = array.length,
      result = Array(length);

  while (++index < length) {
    result[index] = iteratee(array[index], index, array);
  }
  return result;
}

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

/**
 * Creates a function that invokes `func` with arguments transformed by
 * corresponding `transforms`.
 *
 * @static
 * @memberOf _
 * @category Function
 * @param {Function} func The function to wrap.
 * @param {...(Function|Function[])} [transforms] The functions to transform
 * arguments, specified individually or in arrays.
 * @returns {Function} Returns the new function.
 * @example
 *
 * function doubled(n) {
 *   return n * 2;
 * }
 *
 * function square(n) {
 *   return n * n;
 * }
 *
 * var func = _.overArgs(function(x, y) {
 *   return [x, y];
 * }, square, doubled);
 *
 * func(9, 3);
 * // => [81, 6]
 *
 * func(10, 5);
 * // => [100, 10]
 */
var overArgs = rest(function(func, transforms) {
  transforms = arrayMap(baseFlatten(transforms, 1), baseIteratee);

  var funcsLength = transforms.length;
  return rest(function(args) {
    var index = -1,
        length = nativeMin(args.length, funcsLength);

    while (++index < length) {
      args[index] = transforms[index].call(this, args[index]);
    }
    return apply(func, this, args);
  });
});

module.exports = overArgs;
