'use strict';

const DatePart = require('./datepart');

class Month extends DatePart {
  constructor(opts={}) {
    super(opts);
  }

  up() {
    this.date.setMonth(this.date.getMonth() + 1);
  }

  down() {
    this.date.setMonth(this.date.getMonth() - 1);
  }

  setTo(val) {
    val = parseInt(val.substr(-2)) - 1;
    this.date.setMonth(val < 0 ? 0 : val);
  }

  toString() {
    let month = this.date.getMonth();
    let tl = this.token.length;
    return tl === 2 ? String(month + 1).padStart(2, '0')
           : tl === 3 ? this.locales.monthsShort[month]
             : tl === 4 ? this.locales.months[month]
               : String(month + 1);
  }
}

module.exports = Month;