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

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

var LDAPMessage = require('./message')
var Change = require('../change')
var Protocol = require('../protocol')
var lassert = require('../assert')

/// --- API

function ModifyRequest (options) {
  options = options || {}
  assert.object(options)
  lassert.optionalStringDN(options.object)
  lassert.optionalArrayOfAttribute(options.attributes)

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

  this.object = options.object || null
  this.changes = options.changes ? options.changes.slice(0) : []
}
util.inherits(ModifyRequest, LDAPMessage)
Object.defineProperties(ModifyRequest.prototype, {
  type: {
    get: function getType () { return 'ModifyRequest' },
    configurable: false
  },
  _dn: {
    get: function getDN () { return this.object },
    configurable: false
  }
})

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

  this.object = ber.readString()

  ber.readSequence()
  var end = ber.offset + ber.length
  while (ber.offset < end) {
    var c = new Change()
    c.parse(ber)
    c.modification.type = c.modification.type.toLowerCase()
    this.changes.push(c)
  }

  this.changes.sort(Change.compare)
  return true
}

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

  ber.writeString(this.object.toString())
  ber.startSequence()
  this.changes.forEach(function (c) {
    c.toBer(ber)
  })
  ber.endSequence()

  return ber
}

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

  j.object = this.object
  j.changes = []

  this.changes.forEach(function (c) {
    j.changes.push(c.json)
  })

  return j
}

/// --- Exports

module.exports = ModifyRequest