'use strict';

var forEach = require('../../_virtual/forEach.js');
var eachOf = require('./eachOf.js');
var withoutIndex = require('./internal/withoutIndex.js');
var wrapAsync = require('./internal/wrapAsync.js');
var awaitify = require('./internal/awaitify.js');

(function (module, exports) {

	Object.defineProperty(exports, "__esModule", {
	    value: true
	});

	var _eachOf = eachOf.eachOfExports;

	var _eachOf2 = _interopRequireDefault(_eachOf);

	var _withoutIndex = withoutIndex.withoutIndexExports;

	var _withoutIndex2 = _interopRequireDefault(_withoutIndex);

	var _wrapAsync = wrapAsync.__require();

	var _wrapAsync2 = _interopRequireDefault(_wrapAsync);

	var _awaitify = awaitify.awaitifyExports;

	var _awaitify2 = _interopRequireDefault(_awaitify);

	function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

	/**
	 * Applies the function `iteratee` to each item in `coll`, in parallel.
	 * The `iteratee` is called with an item from the list, and a callback for when
	 * it has finished. If the `iteratee` passes an error to its `callback`, the
	 * main `callback` (for the `each` function) is immediately called with the
	 * error.
	 *
	 * Note, that since this function applies `iteratee` to each item in parallel,
	 * there is no guarantee that the iteratee functions will complete in order.
	 *
	 * @name each
	 * @static
	 * @memberOf module:Collections
	 * @method
	 * @alias forEach
	 * @category Collection
	 * @param {Array|Iterable|AsyncIterable|Object} coll - A collection to iterate over.
	 * @param {AsyncFunction} iteratee - An async function to apply to
	 * each item in `coll`. Invoked with (item, callback).
	 * The array index is not passed to the iteratee.
	 * If you need the index, use `eachOf`.
	 * @param {Function} [callback] - A callback which is called when all
	 * `iteratee` functions have finished, or an error occurs. Invoked with (err).
	 * @returns {Promise} a promise, if a callback is omitted
	 * @example
	 *
	 * // dir1 is a directory that contains file1.txt, file2.txt
	 * // dir2 is a directory that contains file3.txt, file4.txt
	 * // dir3 is a directory that contains file5.txt
	 * // dir4 does not exist
	 *
	 * const fileList = [ 'dir1/file2.txt', 'dir2/file3.txt', 'dir/file5.txt'];
	 * const withMissingFileList = ['dir1/file1.txt', 'dir4/file2.txt'];
	 *
	 * // asynchronous function that deletes a file
	 * const deleteFile = function(file, callback) {
	 *     fs.unlink(file, callback);
	 * };
	 *
	 * // Using callbacks
	 * async.each(fileList, deleteFile, function(err) {
	 *     if( err ) {
	 *         console.log(err);
	 *     } else {
	 *         console.log('All files have been deleted successfully');
	 *     }
	 * });
	 *
	 * // Error Handling
	 * async.each(withMissingFileList, deleteFile, function(err){
	 *     console.log(err);
	 *     // [ Error: ENOENT: no such file or directory ]
	 *     // since dir4/file2.txt does not exist
	 *     // dir1/file1.txt could have been deleted
	 * });
	 *
	 * // Using Promises
	 * async.each(fileList, deleteFile)
	 * .then( () => {
	 *     console.log('All files have been deleted successfully');
	 * }).catch( err => {
	 *     console.log(err);
	 * });
	 *
	 * // Error Handling
	 * async.each(fileList, deleteFile)
	 * .then( () => {
	 *     console.log('All files have been deleted successfully');
	 * }).catch( err => {
	 *     console.log(err);
	 *     // [ Error: ENOENT: no such file or directory ]
	 *     // since dir4/file2.txt does not exist
	 *     // dir1/file1.txt could have been deleted
	 * });
	 *
	 * // Using async/await
	 * async () => {
	 *     try {
	 *         await async.each(files, deleteFile);
	 *     }
	 *     catch (err) {
	 *         console.log(err);
	 *     }
	 * }
	 *
	 * // Error Handling
	 * async () => {
	 *     try {
	 *         await async.each(withMissingFileList, deleteFile);
	 *     }
	 *     catch (err) {
	 *         console.log(err);
	 *         // [ Error: ENOENT: no such file or directory ]
	 *         // since dir4/file2.txt does not exist
	 *         // dir1/file1.txt could have been deleted
	 *     }
	 * }
	 *
	 */
	function eachLimit(coll, iteratee, callback) {
	    return (0, _eachOf2.default)(coll, (0, _withoutIndex2.default)((0, _wrapAsync2.default)(iteratee)), callback);
	}

	exports.default = (0, _awaitify2.default)(eachLimit, 3);
	module.exports = exports.default; 
} (forEach.__module, forEach.__module.exports));

var forEachExports = forEach.__module.exports;

exports.forEachExports = forEachExports;
