'use strict';



var util = require('util');

var DataType = require('./data-type.js');



/**

 * @classdesc Provide methods to work with DateTime data.

 * @description Creates DateTime data type definition.

 *

 * @memberof bo.dataTypes

 * @constructor

 *

 * @extends bo.dataTypes.DataType

 */

function DateTime () {

  // Immutable object.

  DataType.call(this);

}

util.inherits(DateTime, DataType);



/**

 * Checks if value is a DateTime data.

 *

 * @function bo.dataTypes.DateTime#parse

 * @param {*} [value] - The value to check.

 * @returns {*} The DateTime value or null when the input value is valid, otherwise undefined.

 */

DateTime.prototype.parse = function (value) {



  if (value === null)

    return value;

  if (value === undefined)

    return null;



  var datetime = value instanceof Date ? value : new Date(value);

  return isNaN(datetime.valueOf()) ? undefined : datetime;

};



/**

 * Checks if value is a DateTime data and is not null.

 *

 * @function bo.dataTypes.DateTime#hasValue

 * @param {data} value - The value to check.

 * @returns {boolean} True if the value is DateTime and not null, otherwise false.

 */

DateTime.prototype.hasValue = function (value) {



  var parsed = this.parse(value);

  return parsed !== undefined && parsed !== null;

};



module.exports = DateTime;