var parse = require('../parse/index.js')
var setMonth = require('../set_month/index.js')

/**
 * @category Quarter Helpers
 * @summary Set the year quarter to the given date.
 *
 * @description
 * Set the year quarter to the given date.
 *
 * @param {Date|String|Number} date - the date to be changed
 * @param {Number} quarter - the quarter of the new date
 * @returns {Date} the new date with the quarter setted
 *
 * @example
 * // Set the 2nd quarter to 2 July 2014:
 * var result = setQuarter(new Date(2014, 6, 2), 2)
 * //=> Wed Apr 02 2014 00:00:00
 */
function setQuarter (dirtyDate, dirtyQuarter) {
  var date = parse(dirtyDate)
  var quarter = Number(dirtyQuarter)
  var oldQuarter = Math.floor(date.getMonth() / 3) + 1
  var diff = quarter - oldQuarter
  return setMonth(date, date.getMonth() + diff * 3)
}

module.exports = setQuarter