function digestToHash(digest: string): string {
  return digest.split(':')[1];
}

export function getOciBlobPath(digest: string): string {
  return `oci/blobs/sha256/${digestToHash(digest)}`;
}

export function getOciManifestPath(repository: string, digest: string): string {
  return `oci/manifests/${repository}/${digestToHash(digest)}`;
}

export function getNpmPackumentPath(packageName: string): string {
  return `npm/packages/${packageName}/index.json`;
}

export function getNpmTarballPath(packageName: string, version: string): string {
  const safeName = packageName.replace('@', '').replace('/', '-');
  return `npm/packages/${packageName}/${safeName}-${version}.tgz`;
}

export function getMavenArtifactPath(
  groupId: string,
  artifactId: string,
  version: string,
  filename: string
): string {
  const groupPath = groupId.replace(/\./g, '/');
  return `maven/artifacts/${groupPath}/${artifactId}/${version}/${filename}`;
}

export function getMavenMetadataPath(groupId: string, artifactId: string): string {
  const groupPath = groupId.replace(/\./g, '/');
  return `maven/metadata/${groupPath}/${artifactId}/maven-metadata.xml`;
}

export function getCargoConfigPath(): string {
  return 'cargo/config.json';
}

export function getCargoIndexPath(crateName: string): string {
  const lower = crateName.toLowerCase();
  const len = lower.length;

  if (len === 1) {
    return `cargo/index/1/${lower}`;
  }

  if (len === 2) {
    return `cargo/index/2/${lower}`;
  }

  if (len === 3) {
    return `cargo/index/3/${lower.charAt(0)}/${lower}`;
  }

  const prefix1 = lower.substring(0, 2);
  const prefix2 = lower.substring(2, 4);
  return `cargo/index/${prefix1}/${prefix2}/${lower}`;
}

export function getCargoCratePath(crateName: string, version: string): string {
  return `cargo/crates/${crateName}/${crateName}-${version}.crate`;
}

export function getComposerMetadataPath(vendorPackage: string): string {
  return `composer/packages/${vendorPackage}/metadata.json`;
}

export function getComposerZipPath(vendorPackage: string, reference: string): string {
  return `composer/packages/${vendorPackage}/${reference}.zip`;
}

export function getPypiMetadataPath(packageName: string): string {
  return `pypi/metadata/${packageName}/metadata.json`;
}

export function getPypiSimpleIndexPath(packageName: string): string {
  return `pypi/simple/${packageName}/index.html`;
}

export function getPypiSimpleRootIndexPath(): string {
  return 'pypi/simple/index.html';
}

export function getPypiPackageFilePath(packageName: string, filename: string): string {
  return `pypi/packages/${packageName}/${filename}`;
}

export function getRubyGemsVersionsPath(): string {
  return 'rubygems/versions';
}

export function getRubyGemsInfoPath(gemName: string): string {
  return `rubygems/info/${gemName}`;
}

export function getRubyGemsNamesPath(): string {
  return 'rubygems/names';
}

export function getRubyGemsGemPath(gemName: string, version: string, platform?: string): string {
  const filename = platform ? `${gemName}-${version}-${platform}.gem` : `${gemName}-${version}.gem`;
  return `rubygems/gems/${filename}`;
}

export function getRubyGemsMetadataPath(gemName: string): string {
  return `rubygems/metadata/${gemName}/metadata.json`;
}