import {Ticker} from '@avocado/timing';

export class WorldTime {

  constructor() {
    this.hour = 0;
    this.ticker = new Ticker(1);
    this._state = 0;
    this.ticker.on('tick', () => {
      this._state = this.hour;
    });
  }

  hour() {
    return this.hour;
  }

  humanReadable() {
    const rawHour = (this.hour + 12) % 12;
    const hour = Math.floor(0 === Math.floor(rawHour) ? 12 : rawHour);
    const minutes = String(Math.floor((rawHour - Math.floor(rawHour)) * 60)).padStart(2, '0');
    if (this.hour >= 12) {
      return `${hour}:${minutes} pm`;
    }
    else {
      return `${hour}:${minutes} am`;
    }
  }

  patchState(patch) {
    this.hour = patch;
  }

  secondsPerHour() {
    return 60;
  }

  get state() {
    return this._state;
  }

  tick(elapsed) {
    this.hour += (elapsed / this.secondsPerHour());
    this.hour = this.hour % 24;
    this.ticker.tick(elapsed);
  }

}