import {compose, TickingPromise} from '@avocado/core';
import {TransitionResult} from '@avocado/timing';

import {StateProperty, Trait} from '../trait';

const decorate = compose(
  StateProperty('name'),
  StateProperty('isTicking'),
);

class ExistentBase extends Trait {

  static defaultState() {
    return {
      name: 'Untitled entity',
      isTicking: true,
    };
  }

  initialize() {
    this._isTicking = this.params.get('isTicking');
  }

  methods() {
    return {

      destroy: () => {
        this.entity.isTicking = false;
        this.entity.emit('destroy');
        this.entity.emit('destroyed');
      },

      transition: (props, duration, easing) => {
        const result = new TransitionResult(
          this.entity,
          props,
          duration,
          easing
        );
        const promise = new TickingPromise((resolve) => {
          resolve(result.promise);
        });
        promise.ticker = (elapsed) => {
          result.tick(elapsed);
        }
        return promise;
      },

    };
  }

}

export class Existent extends decorate(ExistentBase) {}