import type {TAlgorithm} from "jwt-simple";
// TODO: fix jwt-simple types
// eslint-disable-next-line import/default
import jwt from "jwt-simple";

// eslint-disable-next-line import/no-named-as-default-member
const {encode, decode} = jwt;

/** jwt token has iat which is issued at unix timestamp, and an optional exp for expiry */
type JwtClaim = {iat: number; exp?: number};

export function encodeJwtToken(
  claim: Record<string, unknown> & JwtClaim,
  jwtSecret: Buffer | Uint8Array | string,
  algorithm: TAlgorithm = "HS256"
): string {
  const token = encode(
    claim,
    // Note: This type casting is required as even though jwt-simple accepts a buffer as a
    // secret types definitions exposed by @types/jwt-simple only takes a string
    (jwtSecret as unknown) as string,
    algorithm
  );
  return token;
}

export function decodeJwtToken(
  token: string,
  jwtSecret: Buffer | Uint8Array | string,
  algorithm: TAlgorithm = "HS256"
): JwtClaim {
  const claim = decode(token, (jwtSecret as never) as string, false, algorithm) as JwtClaim;
  return claim;
}