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import * as base64 from "https://denopkg.com/chiefbiiko/base64/mod.ts"import { hmac } from "https://denopkg.com/chiefbiiko/hmac/mod.ts"
interface Claims {  iss?: string  sub?: string  aud?: string[] | string  exp?: number  nbf?: number  iat?: number  jti?: string  [key: string]: any}
interface Jose {  alg: string  crit?: string[]  [key: string]: any}
function convertBase64urlFromBase64(base64: string): string {  return base64    .replace(/=/g, "")    .replace(/\+/g, "-")    .replace(/\//g, "_")}
function makeB64urlEncodedString(  input: string | Uint8Array,  inputEncoding: string = "utf8"): string {  if (typeof input === "object")    return convertBase64urlFromBase64(base64.fromUint8Array(input))  const makeTypedArray =    inputEncoding === "hex" ? convertHexToUint8Array : convertUtf8ToTypedArray  return convertBase64urlFromBase64(base64.fromUint8Array(makeTypedArray(input)))}
function convertHexToUint8Array(hex: string): Uint8Array {  if (typeof hex !== "string") throw new TypeError("Expected input to be a string")  if (hex.length % 2 !== 0)    throw new RangeError("String length is not an even number")  var view = new Uint8Array(hex.length / 2)  for (var i = 0; i < hex.length; i += 2)    view[i / 2] = parseInt(hex.substring(i, i + 2), 16)  return view}
function convertUtf8ToTypedArray(utf8: string): Uint8Array {  return new TextEncoder().encode(utf8)}
function makeJwsSigningInput(encodedHeader: string, encodedPayload: string): string {  return `${encodedHeader}.${encodedPayload}`}
function makeHmacSignature(  hash: string,  key: string | Uint8Array,  msg: string | Uint8Array): string | Uint8Array {  return hmac(hash, key, msg, "utf8", "hex")}
function makeSignature(  alg: string,  key: string | Uint8Array,  msg: string | Uint8Array): string | Uint8Array {  if (alg === "HS256") return makeHmacSignature("sha256", key, msg)  if (alg === "HS512") return makeHmacSignature("sha512", key, msg)  throw new RangeError("no matching algorithm")}
function makeJwt(headerObject: Jose, claims: Claims, key: string): string {  try {    const encodedHeader = makeB64urlEncodedString(JSON.stringify(headerObject))    const encodedPayload = makeB64urlEncodedString(JSON.stringify(claims))    const signingInput = makeJwsSigningInput(encodedHeader, encodedPayload)    if (headerObject.alg === "none") return `${signingInput}.`    const signature = makeSignature(headerObject.alg, key, signingInput)    const encodedSignature = makeB64urlEncodedString(signature, "hex")    return `${signingInput}.${encodedSignature}`  } catch (err) {    err.message = `Failed to create a JWT: ${err.message}`    throw err  }}
export { makeJwt }