import eachLimit from './eachLimit.js'
import awaitify from './internal/awaitify.js'

/**
 * The same as [`each`]{@link module:Collections.each} but runs only a single async operation at a time.
 *
 * Note, that unlike [`each`]{@link module:Collections.each}, this function applies iteratee to each item
 * in series and therefore the iteratee functions will complete in order.

 * @name eachSeries
 * @static
 * @memberOf module:Collections
 * @method
 * @see [async.each]{@link module:Collections.each}
 * @alias forEachSeries
 * @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`.
 * The array index is not passed to the iteratee.
 * If you need the index, use `eachOfSeries`.
 * Invoked with (item, callback).
 * @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
 */
function eachSeries(coll, iteratee, callback) {
    return eachLimit(coll, 1, iteratee, callback)
}
export default awaitify(eachSeries, 3);