import Data from "./Generic/Data";
import ResourceIdentifier from "./ResourceIdentifier";
import { DataWithLinksArgs } from "./index";
import MaybeDataWithLinks from "./MaybeDataWithLinks";

/**
 * Used in rare cases where the primary data of a Document is resource identifier
 * objects, and yet those aren't actually part of a relationship (and so have no
 * owner). E.g., resource identifiers in bulk deletion requests.
 *
 * TODO: ResourceIdentifierSets shouldn't actually be allowed to have links.
 * Refactor to accomplish that (which probably means trying again to make
 * pieces of MaybeDataWithLinks into a mixin, but that can get messy in TS,
 * even with "real mixins" support:
 * https://www.typescriptlang.org/docs/handbook/release-notes/typescript-2-2.html)
 */
export default class ResourceIdentifierSet extends MaybeDataWithLinks<ResourceIdentifier> {
  protected _data: Data<ResourceIdentifier>;

  protected constructor(it: DataWithLinksArgs<ResourceIdentifier>) {
    if(typeof it.data === "undefined") {
      throw new Error(
        "Cannot construct a ResourceIdentifierSet with missing data."
      );
    }

    super(it);
  }

  get isSingular() {
    return super.isSingular as boolean;
  }

  toJSON() {
    return this.unwrapWith((it) => it.toJSON(), {});
  }

  static of(it: DataWithLinksArgs<ResourceIdentifier>) {
    return new this(it);
  }
}