const VAPID_PUBLIC_KEY = process.env.NEXT_PUBLIC_VAPID_PUBLIC_KEY ?? "";

export function isPushSupported(): boolean {
  if (typeof window === "undefined") return false;
  return "serviceWorker" in navigator && "PushManager" in window && "Notification" in window;
}

export function getVapidPublicKey(): string {
  return VAPID_PUBLIC_KEY;
}

export function urlBase64ToUint8Array(base64String: string): Uint8Array<ArrayBuffer> {
  const padding = "=".repeat((4 - (base64String.length % 4)) % 4);
  const base64 = (base64String + padding).replace(/-/g, "+").replace(/_/g, "/");
  const rawData = window.atob(base64);
  const outputArray = new Uint8Array(rawData.length) as Uint8Array<ArrayBuffer>;
  for (let i = 0; i < rawData.length; ++i) {
    outputArray[i] = rawData.charCodeAt(i);
  }
  return outputArray;
}