/**
 * Mixin for startOf
 * @function startOf
 * @param {function} Class
 * @returns {function} Class
 */
'use strict'

/** @lends startOf */
function startOf (Class) {
  const units = {{{unitsString}}}

  /** @class StartOfMixed */
  class StartOfMixed extends Class {
    /**
     * Date for start of
     * @param {string} unit - Unit to startOf
     * @see https://momentjs.com/docs/#/manipulating/start-of/
     * @returns {TheDate}
     */
    startOf (unit = 'milliseconds') {
      unit = this.normalizeMomentUnits(unit)
      const unknown = !units.includes(unit)
        if (unknown) {
          throw new Error(`[TheDate] Unsupported unit: ${unit}`)
      }
      const Constructor = this.constructor
      const moment = this.toMoment()
      return new Constructor(moment.startOf(unit))
    }

{{#each units}}
    /**
     * Start of {{this}}
     * @returns {TheDate}
     */
    startOf{{pascalcase this}} () {
      return this.startOf('{{this}}')
    }

{{/each}}

  }
  return StartOfMixed
}

module.exports = startOf