// sw.js — Network-First 서비스 워커
const APP_VERSION = 'v2026040101';
const CACHE_NAME = 'tkfb-' + APP_VERSION;

self.addEventListener('install', function() {
  self.skipWaiting();
});

self.addEventListener('activate', function(event) {
  event.waitUntil(
    caches.keys().then(function(keys) {
      return Promise.all(
        keys.filter(function(k) { return k !== CACHE_NAME; })
            .map(function(k) { return caches.delete(k); })
      );
    }).then(function() {
      return self.clients.claim();
    })
  );
});

self.addEventListener('fetch', function(event) {
  // API, POST, cross-origin, 로그인/대시보드 프록시 경로는 캐싱하지 않음
  if (event.request.url.includes('/api/')) return;
  if (event.request.method !== 'GET') return;
  if (!event.request.url.startsWith(self.location.origin)) return;
  var path = new URL(event.request.url).pathname;
  if (path === '/dashboard' || path === '/login' || path === '/auth' || path.startsWith('/auth/')) return;

  event.respondWith(
    fetch(event.request)
      .then(function(res) {
        if (res.ok) {
          var clone = res.clone();
          caches.open(CACHE_NAME).then(function(c) { c.put(event.request, clone); });
        }
        return res;
      })
      .catch(function() {
        return caches.match(event.request);
      })
  );
});