/** @import {PseudoDocument} from "./_types" */
import BasePseudoDocument from "./base.mjs";


const { ApplicationV2 } = foundry.applications.api;

/** @implements {PseudoDocument}*/
export default class PseudoDocument extends BasePseudoDocument {
  /**
   * Reference to the sheet of this pseudo-document.
   * @type {ApplicationV2|null}
   */
  get sheet() {
    if (this._sheet) return this._sheet;
    const cls = this.constructor.metadata.sheetClass ?? ApplicationV2;
    if (!ApplicationV2.isPrototypeOf(cls)) {
      return void ui.notifications.error("Daggerheart | Error on PseudoDocument | sheetClass must be ApplicationV2");
    }

    const sheet = new cls({ document: this });
    this._sheet = sheet;
  }

  /* -------------------------------------------- */
  /*  Static Properties                           */
  /* -------------------------------------------- */

  /**
   * Set of apps what should be re-render.
   * @type {Set<ApplicationV2>}
   * @internal
   */
  _apps = new Set();

  /* -------------------------------------------- */

  /**
   * Existing sheets of a specific type for a specific document.
   * @type {ApplicationV2 | null}
   */
  _sheet = null;

  /* -------------------------------------------- */
  /*  Display Methods                             */
  /* -------------------------------------------- */

  /**
   * Render all the Application instances which are connected to this PseudoDocument.
   * @param {ApplicationRenderOptions} [options]  Rendering options.
   */
  render(options) {
    for (const app of this._apps ?? []) {
      app.render({ window: { title: app.title }, ...options });
    }
  }

  /* -------------------------------------------- */

  /**
   * Register an application to respond to updates to a certain document.
   * @param {ApplicationV2} app     Application to update.
   * @internal
   */
  _registerApp(app) {
    this._apps.add(app);
  }

  /* -------------------------------------------- */

  /**
   * Remove an application from the render registry.
   * @param {ApplicationV2} app     Application to stop watching.
   */
  _unregisterApp(app) {
    this._apps.delete(app)
  }


  /* -------------------------------------------- */
  /*  Drag and Drop                               */
  /* -------------------------------------------- */

  /**
   * Serialize salient information for this PseudoDocument when dragging it.
   * @returns {object}  An object of drag data.
   */
  toDragData() {
    const dragData = { type: this.documentName, data: this.toObject() };
    if (this.id) dragData.uuid = this.uuid;
    return dragData;
  }

  /* -------------------------------------------- */
  /*  Dialog Methods                              */
  /* -------------------------------------------- */

  /**
   * Spawn a dialog for creating a new PseudoDocument.
   * @param {object} [data]  Data to pre-populate the document with.
   * @param {object} context
   * @param {foundry.documents.Item} context.parent        A parent for the document.
   * @param {string[]|null} [context.types]  A list of types to restrict the choices to, or null for no restriction.
   * @returns {Promise<PseudoDocument|null>}
   */
  static async createDialog(data = {}, { parent, types = null, ...options } = {}) { }


  /**
 * Present a Dialog form to confirm deletion of this PseudoDocument.
 * @param {object} [options]           Positioning and sizing options for the resulting dialog.
 * @returns {Promise<PseudoDocument>}  A Promise which resolves to the deleted PseudoDocument.
 */
  async deleteDialog(options = {}) {
  }
}