import { zxcvbn, zxcvbnOptions, type ZxcvbnResult } from '@zxcvbn-ts/core'
import * as zxcvbnCommonPackage from '@zxcvbn-ts/language-common'
import * as zxcvbnEnPackage from '@zxcvbn-ts/language-fr'

export const usePasswordStrength = (password: Ref<string | undefined>) => {

  // 0 # too guessable: risky password. (guesses < 10 ^ 3)
  // 1 # very guessable: protection from throttled online attacks. (guesses < 10 ^ 6)
  // 2 # somewhat guessable: protection from unthrottled online attacks. (guesses < 10 ^ 8)
  // 3 # safely unguessable: moderate protection from offline slow - hash scenario. (guesses < 10 ^ 10)
  // 4 # very unguessable: strong protection from offline slow - hash scenario. (guesses >= 10 ^ 10)

  const strength = ref<Partial<ZxcvbnResult>>({
    score: 0,
  })

  const options = {
    translations: zxcvbnEnPackage.translations,
    graphs: zxcvbnCommonPackage.adjacencyGraphs,
    dictionary: {
      ...zxcvbnCommonPackage.dictionary,
      ...zxcvbnEnPackage.dictionary,
    },
  }

  zxcvbnOptions.setOptions(options)

  watchDebounced(password, (newPassword) => {
    if (!newPassword) {
      strength.value = {
        score: 0,
      }
      return
    }

    strength.value = zxcvbn(newPassword.trim())
  }, { immediate: true, debounce: 500 })

  return {
    strength,
  }
}