const staticCacheName = 'site-static-v2';
const dynamicCacheName = 'site-dynamic-v1';
const assets = [
    '/',
    '/css/app.css',
    '/css/normalize.css',
    '/css/webapp.css',
    '/css/webappdark.css',
    '/home',
    '/events'
];

// install event
self.addEventListener('install', evt => {
    //console.log('service worker installed');
    evt.waitUntil(
        caches.open(staticCacheName).then((cache) => {
            console.log('caching shell assets');
            return cache.addAll(assets);
        })
    );
});

// activate event
self.addEventListener('activate', evt => {
    //console.log('service worker activated');
    evt.waitUntil(
        caches.keys().then(keys => {
            //console.log(keys);
            return Promise.all(keys
                .filter(key => key !== staticCacheName && key !== dynamicCacheName)
                .map(key => caches.delete(key))
            );
        })
    );
});

// fetch event
self.addEventListener('fetch', evt => {
    //console.log('fetch event', evt);
    evt.respondWith(
        caches.match(evt.request).then(cacheRes => {
            return cacheRes || fetch(evt.request).then(fetchRes => {
                return caches.open(dynamicCacheName).then(cache => {
                    cache.put(evt.request.url, fetchRes.clone()).then(r => {
                        return fetchRes;
                    });

                })
            });
        })
    );
});


//Push notification, this is more of a demo you can test in the dev tool
self.addEventListener('push', evt => {
    const title = "Test Notification";
    const body = "Det her et en demo på hvordan en notification kan se ud! ";
    const icon = "/icons/browserFavIcon.svg"
    const tag = "simple-push-example-tag";
    evt.waitUntil(
      self.registration.showNotification(title, {
          body : body,
          icon : icon,
          tag : tag
      })
    );
});



function displayNotification(){
    if(Notification.permission === 'granted'){
        navigator.serviceWorker.getRegistration()
            .then(function (reg){
                reg.showNotification('Helloe ')
            })
    }
}