/**

 * 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 './ReactInternalTypes';

import ReactSharedInternals from 'shared/ReactSharedInternals';

import {getStackByFiberInDevAndProd} from './ReactFiberComponentStack';

import getComponentNameFromFiber from 'react-reconciler/src/getComponentNameFromFiber';

const ReactDebugCurrentFrame = ReactSharedInternals.ReactDebugCurrentFrame;

export let current: Fiber | null = null;

export let isRendering: boolean = false;

export function getCurrentFiberOwnerNameInDevOrNull(): string | null {

  if (__DEV__) {

    if (current === null) {

      return null;

    }

    const owner = current._debugOwner;

    if (owner !== null && typeof owner !== 'undefined') {

      return getComponentNameFromFiber(owner);

    }

  }

  return null;

}

function getCurrentFiberStackInDev(): string {

  if (__DEV__) {

    if (current === null) {

      return '';

    }

    // Safe because if current fiber exists, we are reconciling,

    // and it is guaranteed to be the work-in-progress version.

    return getStackByFiberInDevAndProd(current);

  }

  return '';

}

export function resetCurrentFiber() {

  if (__DEV__) {

    ReactDebugCurrentFrame.getCurrentStack = null;

    current = null;

    isRendering = false;

  }

}

export function setCurrentFiber(fiber: Fiber | null) {

  if (__DEV__) {

    ReactDebugCurrentFrame.getCurrentStack =

      fiber === null ? null : getCurrentFiberStackInDev;

    current = fiber;

    isRendering = false;

  }

}

export function getCurrentFiber(): Fiber | null {

  if (__DEV__) {

    return current;

  }

  return null;

}

export function setIsRendering(rendering: boolean) {

  if (__DEV__) {

    isRendering = rendering;

  }

}

export function getIsRendering(): void | boolean {

  if (__DEV__) {

    return isRendering;

  }

}