/* eslint max-nested-callbacks: ["error", 8] */
/* eslint-env mocha */
'use strict'

const chai = require('chai')
const dirtyChai = require('dirty-chai')
const expect = chai.expect
chai.use(dirtyChai)
const { expectErrCode } = require('../util')
const crypto = require('../../src')
const fixtures = require('../fixtures/go-stretch-key')

describe('keyStretcher', () => {
  describe('generate', () => {
    const ciphers = ['AES-128', 'AES-256', 'Blowfish']
    const hashes = ['SHA1', 'SHA256', 'SHA512']
    let res
    // @ts-check
    /**
     * @type {Uint8Array}
     */
    let secret

    before(async () => {
      res = await crypto.keys.generateEphemeralKeyPair('P-256')
      secret = await res.genSharedKey(res.key)
    })

    ciphers.forEach((cipher) => {
      hashes.forEach((hash) => {
        it(`${cipher} - ${hash}`, async () => {
          const keys = await crypto.keys.keyStretcher(cipher, hash, secret)
          expect(keys.k1).to.exist()
          expect(keys.k2).to.exist()
        })
      })
    })

    it('handles invalid cipher type', () => {
      return expectErrCode(crypto.keys.keyStretcher('invalid-cipher', 'SHA256', 'secret'), 'ERR_INVALID_CIPHER_TYPE')
    })

    it('handles missing hash type', () => {
      return expectErrCode(crypto.keys.keyStretcher('AES-128', '', 'secret'), 'ERR_MISSING_HASH_TYPE')
    })
  })

  describe('go interop', () => {
    fixtures.forEach((test) => {
      it(`${test.cipher} - ${test.hash}`, async () => {
        const cipher = test.cipher
        const hash = test.hash
        const secret = test.secret
        const keys = await crypto.keys.keyStretcher(cipher, hash, secret)

        expect(keys.k1.iv).to.be.eql(test.k1.iv)
        expect(keys.k1.cipherKey).to.be.eql(test.k1.cipherKey)
        expect(keys.k1.macKey).to.be.eql(test.k1.macKey)

        expect(keys.k2.iv).to.be.eql(test.k2.iv)
        expect(keys.k2.cipherKey).to.be.eql(test.k2.cipherKey)
        expect(keys.k2.macKey).to.be.eql(test.k2.macKey)
      })
    })
  })
})