/**
 * Copyright 2015 CANAL+ Group
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import createCancellablePromise from "./create_cancellable_promise";
import type { CancellationSignal } from "./task_canceller";

/**
 * Wait the given `delay`, resolving the Promise when finished.
 *
 * The `cancellationSignal` given allows to cancel that timeout. In the case it
 * is triggered before the timeout ended, this function will reject the
 * corresponding `CancellationError` through the returned Promise.
 *
 * @param {number} delay - Delay to wait, in milliseconds
 * @param {Object} cancellationSignal - `CancellationSignal` allowing to abort
 * the timeout.
 * @returns {Promise} - Resolve on timeout completion, rejects on timeout
 * cancellation with the corresponding `CancellationError`.
 */
export default function cancellableSleep(
  delay: number,
  cancellationSignal: CancellationSignal,
): Promise<void> {
  return createCancellablePromise(cancellationSignal, (res) => {
    const timeout = setTimeout(() => res(), delay);
    return () => clearTimeout(timeout);
  });
}