/**
 * @fileoverview Service Worker for Rantii PWA
 * @author retoor <retoor@molodetz.nl>
 * @description Handles caching and offline functionality
 * @keywords service worker, pwa, cache, offline
 */

const CACHE_NAME = 'rantii-v1';
const STATIC_ASSETS = [
    './',
    './index.html',
    './manifest.json',
    './css/variables.css',
    './css/base.css',
    './css/themes/dark.css',
    './css/themes/light.css',
    './css/themes/black.css',
    './css/themes/white.css',
    './css/themes/ocean.css',
    './css/themes/forest.css',
    './css/themes/sunset.css',
    './css/components/app-header.css',
    './css/components/app-nav.css',
    './css/components/components.css',
    './css/components/rant.css',
    './css/components/comment.css',
    './css/components/user.css',
    './css/components/notification.css',
    './css/components/form.css',
    './css/components/pages.css',
    './js/app.js',
    './js/api/client.js',
    './js/services/storage.js',
    './js/services/auth.js',
    './js/services/router.js',
    './js/services/theme.js',
    './js/utils/date.js',
    './js/utils/url.js',
    './js/utils/markdown.js',
    './js/utils/template.js',
    './lib/marked.min.js',
    './lib/highlight.min.js',
    './lib/highlight.css'
];

self.addEventListener('install', (event) => {
    event.waitUntil(
        caches.open(CACHE_NAME).then((cache) => {
            return cache.addAll(STATIC_ASSETS);
        })
    );
    self.skipWaiting();
});

self.addEventListener('activate', (event) => {
    event.waitUntil(
        caches.keys().then((cacheNames) => {
            return Promise.all(
                cacheNames.map((cacheName) => {
                    if (cacheName !== CACHE_NAME) {
                        return caches.delete(cacheName);
                    }
                })
            );
        })
    );
    self.clients.claim();
});

self.addEventListener('fetch', (event) => {
    const url = new URL(event.request.url);

    if (url.origin === 'https://dr.molodetz.nl' ||
        url.origin === 'https://devrant.com' ||
        url.origin === 'https://www.devrant.com' ||
        url.pathname.startsWith('/api/')) {
        event.respondWith(
            fetch(event.request).catch(() => {
                return new Response(JSON.stringify({ success: false, error: 'Offline' }), {
                    headers: { 'Content-Type': 'application/json' }
                });
            })
        );
        return;
    }

    if (url.hostname.includes('avatars.devrant.com') || url.hostname.includes('img.devrant.com')) {
        event.respondWith(
            caches.open('rantii-images').then((cache) => {
                return cache.match(event.request).then((response) => {
                    if (response) {
                        return response;
                    }
                    return fetch(event.request).then((networkResponse) => {
                        cache.put(event.request, networkResponse.clone());
                        return networkResponse;
                    }).catch(() => {
                        return new Response('', { status: 404 });
                    });
                });
            })
        );
        return;
    }

    event.respondWith(
        caches.match(event.request).then((response) => {
            if (response) {
                return response;
            }
            return fetch(event.request).then((networkResponse) => {
                if (networkResponse && networkResponse.status === 200) {
                    const responseClone = networkResponse.clone();
                    caches.open(CACHE_NAME).then((cache) => {
                        cache.put(event.request, responseClone);
                    });
                }
                return networkResponse;
            }).catch(() => {
                if (event.request.destination === 'document') {
                    return caches.match('./index.html');
                }
            });
        })
    );
});

self.addEventListener('message', (event) => {
    if (event.data && event.data.type === 'SKIP_WAITING') {
        self.skipWaiting();
    }
});