import {compose} from '@avocado/core';
import {Trait} from '@avocado/entity';
import {Property} from '@avocado/mixins';

const decorate = compose(
)

export class Emitter extends decorate(Trait) {

  initialize() {
    this.emitters = {};
  }

  hooks() {
    return {

      afterDestructionTickers: () => {
        return (elapsed) => {
          for (const key in this.emitters) {
            const emitter = this.emitters[key];
            emitter.tick(elapsed);
            if (!emitter.hasParticles()) {
              delete this.emitters[key];
            }
          }
          return 0 === Object.keys(this.emitters).length;
        };
      },

    }
  }

  methods() {
    return {

      addEmitter: (key, emitter) => {
        this.emitters[key] = emitter;
      },

      addEmitterRenderer: (key, renderer) => {
        if (!this.emitters[key]) {
          return;
        }
        this.emitters[key].addRenderer(renderer);
      },

      emitParticle: (key, ...args) => {
        if (!this.emitters[key]) {
          return;
        }
        this.emitters[key].emit(...args);
      },

    }
  }

  tick(elapsed) {
    for (const key in this.emitters) {
      const emitter = this.emitters[key];
      emitter.tick(elapsed);
    }
  }

}