import { System } from '../ecs/System.js';
import { Transform } from '../components/Transform.js';
import { MeshComponent } from '../components/MeshComponent.js';

/**
 * RenderSystem - syncs Three.js mesh positions with Transform components
 */
export class RenderSystem extends System {
  constructor(scene) {
    super();
    this.scene = scene;
  }

  update(_deltaTime) {
    const entities = this.getEntities(Transform, MeshComponent);

    for (const entityId of entities) {
      const transform = this.getComponent(entityId, Transform);
      const meshComp = this.getComponent(entityId, MeshComponent);

      // Sync mesh transform with component
      meshComp.mesh.position.copy(transform.position);
      meshComp.mesh.rotation.copy(transform.rotation);
      meshComp.mesh.scale.copy(transform.scale);
    }
  }
}