/**

 * 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 ErrorStackParser from 'error-stack-parser';

import testErrorStack, {

  SOURCE_STACK_FRAME_LINE_NUMBER,

} from './ErrorTesterCompiled';

let sourceMapsAreAppliedToErrors: boolean | null = null;

// Source maps are automatically applied to Error stack frames.

export function areSourceMapsAppliedToErrors(): boolean {

  if (sourceMapsAreAppliedToErrors === null) {

    try {

      testErrorStack();

      sourceMapsAreAppliedToErrors = false;

    } catch (error) {

      const parsed = ErrorStackParser.parse(error);

      const topStackFrame = parsed[0];

      const lineNumber = topStackFrame.lineNumber;

      if (lineNumber === SOURCE_STACK_FRAME_LINE_NUMBER) {

        sourceMapsAreAppliedToErrors = true;

      }

    }

  }

  return sourceMapsAreAppliedToErrors === true;

}