/**
 * Copyright (c) Microsoft Corporation.
 *
 * 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.
 */

export class ManualPromise<T> extends Promise<T> {
  private _resolve!: (t: T) => void;
  private _reject!: (e: Error) => void;
  private _isDone: boolean;

  constructor() {
    let resolve: (t: T) => void;
    let reject: (e: Error) => void;
    super((f, r) => {
      resolve = f;
      reject = r;
    });
    this._isDone = false;
    this._resolve = resolve!;
    this._reject = reject!;
  }

  isDone() {
    return this._isDone;
  }

  resolve(t: T) {
    this._isDone = true;
    this._resolve(t);
  }

  reject(e: Error) {
    this._isDone = true;
    this._reject(e);
  }

  static override get [Symbol.species]() {
    return Promise;
  }

  override get [Symbol.toStringTag]() {
    return 'ManualPromise';
  }
}