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

var assert = require('assert');
var util = require('util');

var LDAPMessage = require('./message');
var dn = require('../dn');
var Attribute = require('../attribute');
var Protocol = require('../protocol');



///--- Globals

var isDN = dn.DN.isDN;


///--- API

function AddRequest(options) {
  if (options) {
    if (typeof (options) !== 'object')
      throw new TypeError('options must be an object');
    if (options.entry &&
        !(isDN(options.entry) || typeof (options.entry) === 'string')) {
      throw new TypeError('options.entry must be a DN or string');
    }
    if (options.attributes) {
      if (!Array.isArray(options.attributes))
        throw new TypeError('options.attributes must be [Attribute]');
      options.attributes.forEach(function (a) {
        if (!Attribute.isAttribute(a))
          throw new TypeError('options.attributes must be [Attribute]');
      });
    }
  } else {
    options = {};
  }

  options.protocolOp = Protocol.LDAP_REQ_ADD;
  LDAPMessage.call(this, options);

  this.entry = options.entry || null;
  this.attributes = options.attributes ? options.attributes.slice(0) : [];

  var self = this;
  this.__defineGetter__('type', function () { return 'AddRequest'; });
  this.__defineGetter__('_dn', function () { return self.entry; });
}
util.inherits(AddRequest, LDAPMessage);
module.exports = AddRequest;


AddRequest.prototype._parse = function (ber) {
  assert.ok(ber);

  this.entry = ber.readString();

  ber.readSequence();

  var end = ber.offset + ber.length;
  while (ber.offset < end) {
    var a = new Attribute();
    a.parse(ber);
    a.type = a.type.toLowerCase();
    if (a.type === 'objectclass') {
      for (var i = 0; i < a.vals.length; i++)
        a.vals[i] = a.vals[i].toLowerCase();
    }
    this.attributes.push(a);
  }

  this.attributes.sort(Attribute.compare);
  return true;
};


AddRequest.prototype._toBer = function (ber) {
  assert.ok(ber);

  ber.writeString(this.entry.toString());
  ber.startSequence();
  this.attributes.forEach(function (a) {
    a.toBer(ber);
  });
  ber.endSequence();

  return ber;
};


AddRequest.prototype._json = function (j) {
  assert.ok(j);

  j.entry = this.entry.toString();
  j.attributes = [];

  this.attributes.forEach(function (a) {
    j.attributes.push(a.json);
  });

  return j;
};


AddRequest.prototype.indexOf = function (attr) {
  if (!attr || typeof (attr) !== 'string')
    throw new TypeError('attr (string) required');

  for (var i = 0; i < this.attributes.length; i++) {
    if (this.attributes[i].type === attr)
      return i;
  }

  return -1;
};


AddRequest.prototype.attributeNames = function () {
  var attrs = [];

  for (var i = 0; i < this.attributes.length; i++)
    attrs.push(this.attributes[i].type.toLowerCase());

  return attrs;
};


AddRequest.prototype.getAttribute = function (name) {
  if (!name || typeof (name) !== 'string')
    throw new TypeError('attribute name (string) required');

  name = name.toLowerCase();

  for (var i = 0; i < this.attributes.length; i++) {
    if (this.attributes[i].type === name)
      return this.attributes[i];
  }

  return null;
};


AddRequest.prototype.addAttribute = function (attr) {
  if (!(attr instanceof Attribute))
    throw new TypeError('attribute (Attribute) required');

  return this.attributes.push(attr);
};


/**
 * Returns a "pure" JS representation of this object.
 *
 * An example object would look like:
 *
 * {
 *   "dn": "cn=unit, dc=test",
 *   "attributes": {
 *     "cn": ["unit", "foo"],
 *     "objectclass": ["top", "person"]
 *   }
 * }
 *
 * @return {Object} that looks like the above.
 */
AddRequest.prototype.toObject = function () {
  var self = this;

  var obj = {
    dn: self.entry ? self.entry.toString() : '',
    attributes: {}
  };

  if (!this.attributes || !this.attributes.length)
    return obj;

  this.attributes.forEach(function (a) {
    if (!obj.attributes[a.type])
      obj.attributes[a.type] = [];

    a.vals.forEach(function (v) {
      if (obj.attributes[a.type].indexOf(v) === -1)
        obj.attributes[a.type].push(v);
    });
  });

  return obj;
};