/**
 * 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 strict-local
 * @format
 * @oncall react_native
 */

import type {DuplicatesSet} from '../flow-types';

import H from '../constants';

export class DuplicateHasteCandidatesError extends Error {
  hasteName: string;
  platform: string | null;
  supportsNativePlatform: boolean;
  duplicatesSet: DuplicatesSet;

  constructor(
    name: string,
    platform: string,
    supportsNativePlatform: boolean,
    duplicatesSet: DuplicatesSet,
  ) {
    const platformMessage = getPlatformMessage(platform);
    super(
      `The name \`${name}\` was looked up in the Haste module map. It ` +
        'cannot be resolved, because there exists several different ' +
        'files, or packages, that provide a module for ' +
        `that particular name and platform. ${platformMessage} You must ` +
        'delete or exclude files until there remains only one of these:\n\n' +
        Array.from(duplicatesSet)
          .map(
            ([dupFilePath, dupFileType]) =>
              `  * \`${dupFilePath}\` (${getTypeMessage(dupFileType)})\n`,
          )
          .sort()
          .join(''),
    );
    this.hasteName = name;
    this.platform = platform;
    this.supportsNativePlatform = supportsNativePlatform;
    this.duplicatesSet = duplicatesSet;
  }
}

function getPlatformMessage(platform: string) {
  if (platform === H.GENERIC_PLATFORM) {
    return 'The platform is generic (no extension).';
  }
  return `The platform extension is \`${platform}\`.`;
}

function getTypeMessage(type: number) {
  switch (type) {
    case H.MODULE:
      return 'module';
    case H.PACKAGE:
      return 'package';
  }
  return 'unknown';
}