import {compose} from '@avocado/core';
import {hasGraphics, Container} from '@avocado/graphics';

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

const decorate = compose(
);

class GraphicalBase extends Trait {

  static defaultParams() {
    return {
      trackPosition: true,
    };
  }

  static defaultState() {
    return {};
  }

  constructor(...args) {
    super(...args);
    if (hasGraphics) {
      this._container = new Container();
    }
  }

  get container() {
    return this._container;
  }

  listeners() {
    const listeners = {};
    const trackPosition = this.params.get('trackPosition');
    if (trackPosition && hasGraphics) {
      listeners.traitAdded = (trait) => {
        if ('positioned' === trait.constructor.type()) {
          this.entity.container.position = this.entity.position;
        }
      };
      listeners.xChanged = (x) => {
        this.entity.container.x = x;
      };
      listeners.yChanged = (y) => {
        this.entity.container.y = y;
      };
    }
    return listeners;
  }

}

export class Graphical extends decorate(GraphicalBase) {}