export const NDC_CREDENTIAL_REFERENCE_OWNER = "ndc_l2_credentials";

const CREDENTIAL_REFERENCE_PATTERN =
  /^ndc-credref:[A-Za-z0-9][A-Za-z0-9._:-]{7,240}$/;

export function normalizeNdcCredentialReference(input) {
  if (!input || typeof input !== "object" || Array.isArray(input)) {
    throw new TypeError("ndc_credential_reference_invalid");
  }
  for (const key of Object.keys(input)) {
    if (!new Set(["owner", "reference"]).has(key)) {
      throw new TypeError(`ndc_credential_reference_field_unexpected:${key}`);
    }
  }
  if (input.owner !== NDC_CREDENTIAL_REFERENCE_OWNER) {
    throw new TypeError("ndc_credential_reference_owner_invalid");
  }
  if (!isNdcCredentialReferenceValue(input.reference)) {
    throw new TypeError("ndc_credential_reference_value_invalid");
  }
  return Object.freeze({
    owner: NDC_CREDENTIAL_REFERENCE_OWNER,
    reference: input.reference,
  });
}

export function isNdcCredentialReferenceValue(value) {
  return typeof value === "string" && CREDENTIAL_REFERENCE_PATTERN.test(value);
}