// Copyright 2011 Mark Cavage, Inc.  All rights reserved.

const assert = require('assert-plus')
const util = require('util')

const asn1 = require('asn1')

const LDAPMessage = require('./message')
const Protocol = require('../protocol')

/// --- Globals

const Ber = asn1.Ber
const LDAP_BIND_SIMPLE = 'simple'
// var LDAP_BIND_SASL = 'sasl'

/// --- API

function BindRequest (options) {
  options = options || {}
  assert.object(options)

  options.protocolOp = Protocol.LDAP_REQ_BIND
  LDAPMessage.call(this, options)

  this.version = options.version || 0x03
  this.name = options.name || null
  this.authentication = options.authentication || LDAP_BIND_SIMPLE
  this.credentials = options.credentials || ''
}
util.inherits(BindRequest, LDAPMessage)
Object.defineProperties(BindRequest.prototype, {
  type: {
    get: function getType () { return 'BindRequest' },
    configurable: false
  },
  _dn: {
    get: function getDN () { return this.name },
    configurable: false
  }
})

BindRequest.prototype._parse = function (ber) {
  assert.ok(ber)

  this.version = ber.readInt()
  this.name = ber.readString()

  const t = ber.peek()

  // TODO add support for SASL et al
  if (t !== Ber.Context) { throw new Error('authentication 0x' + t.toString(16) + ' not supported') }

  this.authentication = LDAP_BIND_SIMPLE
  this.credentials = ber.readString(Ber.Context)

  return true
}

BindRequest.prototype._toBer = function (ber) {
  assert.ok(ber)

  ber.writeInt(this.version)
  ber.writeString((this.name || '').toString())
  // TODO add support for SASL et al
  ber.writeString((this.credentials || ''), Ber.Context)

  return ber
}

BindRequest.prototype._json = function (j) {
  assert.ok(j)

  j.version = this.version
  j.name = this.name
  j.authenticationType = this.authentication
  j.credentials = this.credentials

  return j
}

/// --- Exports

module.exports = BindRequest