import { type Position, type PropertyBag, toPosition, type Vec2 } from './Properties';

/**
 * An asset placed inside a scene. Overrides are sparse: only keys the user changed are stored,
 * everything else follows the asset.
 */
export interface SceneObject {
  id: string;
  assetId: string;
  /** Falls back to the asset name when empty. */
  name: string;
  /** Relative to the parent, `z` included; see `hierarchy.ts` for world coordinates. */
  position: Position;
  /**
   * Editor-only shift of where this object and everything below it is drawn – never part of the
   * game. It pulls apart objects that sit on top of each other without moving them for real.
   */
  editorOffset: Vec2;
  overrides: PropertyBag;
  /**
   * Parent object of the same scene, empty string = top level. Children move with their parent and
   * are removed with it; behaviors treat their parent as the "owner" the graph acts on.
   */
  parentId: string;
  /**
   * The template object inside the container asset this one was instantiated from, empty for
   * everything else – the link that lets template changes reach the instances later on.
   */
  templateId: string;
}

export function createSceneObject(
  id: string,
  assetId: string,
  position: Vec2 | Position,
  parentId = '',
): SceneObject {
  return {
    id,
    assetId,
    name: '',
    position: toPosition(position),
    editorOffset: { x: 0, y: 0 },
    overrides: {},
    parentId,
    templateId: '',
  };
}