/**
 * Notices Service
 *
 * Handles all data operations for notices including fetching
 * and real-time subscriptions for bulletin board display.
 *
 * Returns data directly from PocketBase with no transformations.
 * Uses created field from RecordModel for posted date.
 */

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

/**
 * Fetches all notices from PocketBase
 * Returns notices sorted by created date (newest first)
 * Includes both active and expired notices for display
 *
 * @returns Array of all notice records sorted by creation date
 */
export async function getNotices(): Promise<Notice[]> {
  return await pb.collection(Collections.Notices).getFullList<Notice>({
    sort: "-created",
  });
}

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

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