/**

 * 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 {HookSourceAndMetadata} from './loadSourceAndMetadata';

import type {HooksNode, HooksTree} from 'react-debug-tools/src/ReactDebugHooks';

import type {HookNames} from 'react-devtools-shared/src/frontend/types';

import type {FetchFileWithCaching} from 'react-devtools-shared/src/devtools/views/Components/FetchFileWithCachingContext';

import {withAsyncPerfMeasurements} from 'react-devtools-shared/src/PerformanceLoggingUtils';

import WorkerizedParseSourceAndMetadata from './parseSourceAndMetadata.worker';

import typeof * as ParseSourceAndMetadataModule from './parseSourceAndMetadata';

import {flattenHooksList, loadSourceAndMetadata} from './loadSourceAndMetadata';

const workerizedParseHookNames: ParseSourceAndMetadataModule =

  WorkerizedParseSourceAndMetadata();

export function parseSourceAndMetadata(

  hooksList: Array<HooksNode>,

  locationKeyToHookSourceAndMetadata: Map<string, HookSourceAndMetadata>,

): Promise<HookNames | null> {

  return workerizedParseHookNames.parseSourceAndMetadata(

    hooksList,

    locationKeyToHookSourceAndMetadata,

  );

}

export const purgeCachedMetadata = workerizedParseHookNames.purgeCachedMetadata;

const EMPTY_MAP: HookNames = new Map();

export async function parseHookNames(

  hooksTree: HooksTree,

  fetchFileWithCaching: FetchFileWithCaching | null,

): Promise<HookNames | null> {

  return withAsyncPerfMeasurements('parseHookNames', async () => {

    const hooksList = flattenHooksList(hooksTree);

    if (hooksList.length === 0) {

      // This component tree contains no named hooks.

      return EMPTY_MAP;

    }

    // Runs on the main/UI thread so it can reuse Network cache:

    const locationKeyToHookSourceAndMetadata = await loadSourceAndMetadata(

      hooksList,

      fetchFileWithCaching,

    );

    // Runs in a Worker because it's CPU intensive:

    return parseSourceAndMetadata(

      hooksList,

      locationKeyToHookSourceAndMetadata,

    );

  });

}