import * as jose from "jose"

export const hashPassword = async (password: string) => {
  const iterations = 600000
  const encoder = new TextEncoder()
  const bytes = encoder.encode(password)
  const salt = crypto.getRandomValues(new Uint8Array(16))
  const keyMaterial = await crypto.subtle.importKey(
    "raw",
    bytes,
    "PBKDF2",
    false,
    ["deriveBits"],
  )
  const hash = await crypto.subtle.deriveBits(
    {
      name: "PBKDF2",
      hash: "SHA-256",
      salt: salt,
      iterations,
    },
    keyMaterial,
    256,
  )
  const hashB64 = jose.base64url.encode(new Uint8Array(hash))
  const saltB64 = jose.base64url.encode(salt)
  return {
    hash: hashB64,
    salt: saltB64,
    iterations,
  }
}

export const verifyPassword = async (
  password: string,
  hashB64: string,
  saltB64: string,
  iterations: number,
) => {
  const encoder = new TextEncoder()
  const passwordBytes = encoder.encode(password)
  const salt = jose.base64url.decode(saltB64)
  const params = {
    name: "PBKDF2",
    hash: "SHA-256",
    salt,
    iterations,
  }
  const keyMaterial = await crypto.subtle.importKey(
    "raw",
    passwordBytes,
    "PBKDF2",
    false,
    ["deriveBits"],
  )
  const hash = await crypto.subtle.deriveBits(params, keyMaterial, 256)
  const hashBase64 = jose.base64url.encode(new Uint8Array(hash))
  return hashBase64 === hashB64
}