/**

 * Copyright (c) Meta Platforms, Inc. and affiliates.

 *

 * This source code is licensed under the MIT license found in the

 * LICENSE file in the root directory of this source tree.

 *

 * @flow

 */

import type {Fiber} from './ReactFiber';

import ReactSharedInternals from 'shared/ReactSharedInternals';

import {warnsIfNotActing} from './ReactFiberConfig';

const {ReactCurrentActQueue} = ReactSharedInternals;

export function isLegacyActEnvironment(fiber: Fiber): boolean {

  if (__DEV__) {

    // Legacy mode. We preserve the behavior of React 17's act. It assumes an

    // act environment whenever `jest` is defined, but you can still turn off

    // spurious warnings by setting IS_REACT_ACT_ENVIRONMENT explicitly

    // to false.

    const isReactActEnvironmentGlobal =

      // $FlowFixMe[cannot-resolve-name] Flow doesn't know about IS_REACT_ACT_ENVIRONMENT global

      typeof IS_REACT_ACT_ENVIRONMENT !== 'undefined'

        ? // $FlowFixMe[cannot-resolve-name]

          IS_REACT_ACT_ENVIRONMENT

        : undefined;

    // $FlowFixMe[cannot-resolve-name] - Flow doesn't know about jest

    const jestIsDefined = typeof jest !== 'undefined';

    return (

      warnsIfNotActing && jestIsDefined && isReactActEnvironmentGlobal !== false

    );

  }

  return false;

}

export function isConcurrentActEnvironment(): void | boolean {

  if (__DEV__) {

    const isReactActEnvironmentGlobal =

      // $FlowFixMe[cannot-resolve-name] Flow doesn't know about IS_REACT_ACT_ENVIRONMENT global

      typeof IS_REACT_ACT_ENVIRONMENT !== 'undefined'

        ? // $FlowFixMe[cannot-resolve-name]

          IS_REACT_ACT_ENVIRONMENT

        : undefined;

    if (!isReactActEnvironmentGlobal && ReactCurrentActQueue.current !== null) {

      // TODO: Include link to relevant documentation page.

      console.error(

        'The current testing environment is not configured to support ' +

          'act(...)',

      );

    }

    return isReactActEnvironmentGlobal;

  }

  return false;

}