import { action, observable } from "mobx";
import { broadcastMessage, subscribeToBroadcast } from "../../common/ipc";
import { CatalogEntity, CatalogEntityData } from "../../common/catalog-entity";
import { catalogCategoryRegistry, CatalogCategoryRegistry } from "../../common/catalog-category-registry";
import "../../common/catalog-entities";

export { CatalogEntity, CatalogEntityData, CatalogEntityContextMenuContext } from "../../common/catalog-entity";

export class CatalogEntityRegistry {
  @observable protected _items: CatalogEntity[] = observable.array([], { deep: true });

  constructor(private categoryRegistry: CatalogCategoryRegistry) {}

  init() {
    subscribeToBroadcast("catalog:items", (ev, items: CatalogEntityData[]) => {
      this.updateItems(items);
    });
    broadcastMessage("catalog:broadcast");
  }

  @action updateItems(items: CatalogEntityData[]) {
    this._items.forEach((item, index) => {
      const foundIndex = items.findIndex((i) => i.apiVersion === item.apiVersion && i.kind === item.kind && i.metadata.uid === item.metadata.uid);

      if (foundIndex === -1) {
        this._items.splice(index, 1);
      }
    });

    items.forEach((data) => {
      const item = this.categoryRegistry.getEntityForData(data);

      if (!item) return; // invalid data

      const index = this._items.findIndex((i) => i.apiVersion === item.apiVersion && i.kind === item.kind && i.metadata.uid === item.metadata.uid);

      if (index === -1) {
        this._items.push(item);
      } else {
        this._items.splice(index, 1, item);
      }
    });
  }

  get items() {
    return this._items;
  }

  getItemsForApiKind<T extends CatalogEntity>(apiVersion: string, kind: string): T[] {
    const items = this._items.filter((item) => item.apiVersion === apiVersion && item.kind === kind);

    return items as T[];
  }
}

export const catalogEntityRegistry = new CatalogEntityRegistry(catalogCategoryRegistry);