/* global on:false */

import { getSetItems, getIntValue, exists } from './utilities';

export class ProficiencyBonus {
  get(level, challenge) {
    let pb = 2;

    level = getIntValue(level);
    if (challenge === '1/8' || challenge === '1/4' || challenge === '1/2') {
      challenge = 1;
    } else {
      getIntValue(challenge);
    }
    const levelOrChallenge = Math.max(level, challenge);

    if (exists(levelOrChallenge)) {
      pb += Math.floor(Math.abs((levelOrChallenge - 1) / 4));
    }
    return pb;
  }
  update() {
    getSetItems('proficiencyBonus.update', {
      collectionArray: ['level', 'challenge', 'pb', 'exp', 'h_PB'],
      callback: (v, finalSetAttrs) => {
        const pb = this.get(v.level, v.challenge);
        finalSetAttrs.pb = pb;
        finalSetAttrs.exp = pb * 2;
        finalSetAttrs.h_PB = pb / 2;
      },
    });
  }
  setup() {
    on('change:level', () => {
      this.update();
    });
  }
}