'use strict';

var utils = require('../utils');
var common = require('./common');
var DataModificationBase = require('../base-messages/DataModificationBase');

module.exports = DataModificationMessage;

function DataModificationMessage(content, transport) {
  DataModificationBase.call(this, content, transport);
}

require('util').inherits(DataModificationMessage, DataModificationBase);

DataModificationMessage.prototype.attribute = function (arg0, arg1, arg2) {
  var name = arg0;
  utils.validate.notEmptyString(name, 'attribute name');
  utils.validate.attributeName(this._content.attributes, name);

  if (arg1 === undefined) {
    this._content.attributes.push({ name: name });
    return this;
  }

  if (typeof arg1 === 'boolean') {
    this._content.attributes.push({ name: name, successful: arg1 });
    return this;
  }

  if (typeof arg1 === 'string') {
    utils.validate.string(arg1, 'attribute old value');
    utils.validate.string(arg2, 'attribute new value');
    this._content.attributes.push({ name: name, old: arg1, new: arg2 });
    return this;
  }

  throw new Error('Second argument is neither a boolean nor a string');
};

DataModificationMessage.prototype.log = common.log;