/**
 * Local push notifications for background message delivery.
 *
 * Uses a minimal Objective-C native module (ios/LocalNotifications/) that wraps
 * UNUserNotificationCenter directly. No aps-environment entitlement needed.
 */
import { AppState, NativeModules } from "react-native";

const { LocalNotifications } = NativeModules;

let permissionGranted = false;

/** Request notification permissions. Call once at app startup. */
export async function requestNotificationPermissions(): Promise<boolean> {
  try {
    if (!LocalNotifications) return false;
    permissionGranted = await LocalNotifications.requestPermissions();
  } catch {
    permissionGranted = false;
  }
  return permissionGranted;
}

/** Returns true if the app is currently in the background or inactive. */
export function isAppBackgrounded(): boolean {
  return AppState.currentState !== "active";
}

/** Fire a local notification for an incoming message. */
export async function notifyIncomingMessage(
  title: string,
  body: string,
): Promise<void> {
  if (!permissionGranted || !isAppBackgrounded() || !LocalNotifications) return;
  try {
    await LocalNotifications.notify(title, body);
  } catch {
    // Best-effort
  }
}