/**
 * Companies Service
 *
 * Handles all data operations for companies including fetching,
 * updating presence status, and real-time subscriptions.
 *
 * Returns data directly from PocketBase with no transformations.
 * File URLs are resolved at display time using getFileUrl() helper.
 */

import { pb, Collections } from "@/lib/pocketbase";
import type { Company } from "@/types/company";
import { safely } from "@/lib/result";

/**
 * Fetches all companies from PocketBase
 * Returns companies sorted alphabetically by short name
 *
 * @returns Array of all company records sorted by name
 */
export async function getCompanies(): Promise<Company[]> {
  return await pb.collection(Collections.Companies).getFullList<Company>({
    sort: "short_name",
  });
}

/**
 * Updates a company's presence status (present/absent)
 * Used when tenants mark themselves as present or absent at the kiosk
 */
export async function updateCompanyStatus(companyId: string, status: "present" | "absent"): Promise<Company> {
  return await pb.collection(Collections.Companies).update<Company>(companyId, {
    status,
  });
}

/**
 * Subscribes to real-time company updates
 * Callback is invoked whenever any company record is created, updated, or deleted
 *
 * @param callback Function to call when companies change
 * @returns Unsubscribe function to clean up the subscription
 */
export function subscribeToCompanies(callback: (companies: Company[]) => void): () => void {
  pb.collection(Collections.Companies).subscribe<Company>("*", async () => {
    const companies = await getCompanies();
    callback(companies);
  });

  return () => {
    safely(() => pb.collection(Collections.Companies).unsubscribe("*"));
  };
}