// Please see documentation at https://docs.microsoft.com/aspnet/core/client-side/bundling-and-minification
// for details on configuring this project to bundle and minify static web assets.

if ('serviceWorker' in navigator) {
    window.addEventListener('load', function () {
        navigator.serviceWorker.register('/service-worker.js')
            .then(function (registration) {
                console.log('✅ Service Worker registrerad med scope:', registration.scope);
                subscribeToPush().catch(console.error);
            })
            .catch(function (error) {
                console.log('❌ Service Worker-registrering misslyckades:', error);
            });
    });
}

async function subscribeToPush() {
    const registration = await navigator.serviceWorker.ready;
    const publicVapidKey = await fetch('/api/push/vapid-public-key').then(r => r.text());

    const subscription = await registration.pushManager.subscribe({
        userVisibleOnly: true,
        applicationServerKey: urlBase64ToUint8Array(publicVapidKey)
    });

    await fetch('/api/push/subscribe', {
        method: 'POST',
        body: JSON.stringify(subscription),
        headers: { 'Content-Type': 'application/json' }
    });

    console.log('✅ Push-prenumeration skickad');
}

async function enablePush() {
    const permission = await Notification.requestPermission();

    if (permission !== "granted") {
        alert("Du måste tillåta notiser för att få push.");
        return;
    }

    const registration = await navigator.serviceWorker.ready;
    const publicVapidKey = await fetch('/api/push/vapid-public-key').then(r => r.text());

    const subscription = await registration.pushManager.subscribe({
        userVisibleOnly: true,
        applicationServerKey: urlBase64ToUint8Array(publicVapidKey.trim()) // 👈 .trim() viktigt
    });


    await fetch("/api/push/subscribe", {
        method: "POST",
        body: JSON.stringify(subscription),
        headers: { "Content-Type": "application/json" }
    });

    alert("✅ Push-notiser aktiverade!");
}




// utility för att konvertera nyckeln
function urlBase64ToUint8Array(base64String) {
    const padding = '='.repeat((4 - base64String.length % 4) % 4);
    const base64 = (base64String + padding).replace(/-/g, '+').replace(/_/g, '/');
    const raw = atob(base64);
    return new Uint8Array([...raw].map(char => char.charCodeAt(0)));
}
