'use strict'

const validator = require('./lib/validator')
const parse = require('./lib/parse')
const redactor = require('./lib/redactor')
const restorer = require('./lib/restorer')
const { groupRedact, nestedRedact } = require('./lib/modifiers')
const state = require('./lib/state')
const rx = require('./lib/rx')
const validate = validator()
const noop = (o) => o
noop.restore = noop

const DEFAULT_CENSOR = '[REDACTED]'
fastRedact.rx = rx
fastRedact.validator = validator

module.exports = fastRedact

function fastRedact (opts = {}) {
  const paths = Array.from(new Set(opts.paths || []))
  const serialize = 'serialize' in opts ? (
    opts.serialize === false ? opts.serialize
      : (typeof opts.serialize === 'function' ? opts.serialize : JSON.stringify)
  ) : JSON.stringify
  const remove = opts.remove
  if (remove === true && serialize !== JSON.stringify) {
    throw Error('fast-redact – remove option may only be set when serializer is JSON.stringify')
  }
  const censor = remove === true
    ? undefined
    : 'censor' in opts ? opts.censor : DEFAULT_CENSOR

  const isCensorFct = typeof censor === 'function'
  const censorFctTakesPath = isCensorFct && censor.length > 1

  if (paths.length === 0) return serialize || noop

  validate({ paths, serialize, censor })

  const { wildcards, wcLen, secret } = parse({ paths, censor })

  const compileRestore = restorer({ secret, wcLen })
  const strict = 'strict' in opts ? opts.strict : true

  return redactor({ secret, wcLen, serialize, strict, isCensorFct, censorFctTakesPath }, state({
    secret,
    censor,
    compileRestore,
    serialize,
    groupRedact,
    nestedRedact,
    wildcards,
    wcLen
  }))
}