"use strict";

const Promise = require("bluebird");
const notifiedPromise = require("./notified-promise");

// FIXME: Move into separate package

module.exports = function createNotifiedWhen() {
	let notifier = notifiedPromise();

	function when(condition, callback) {
		if (condition()) {
			return callback();
		} else {
			return Promise.try(() => {
				return notifier.wait();
			}).then(() => {
				return when(condition, callback);
			});
		}
	}

	when.notify = function notifyWhen() {
		return notifier.notify();
	};

	return when;
};