import { defineConfig } from 'astro/config';

// Static output (zero runtime) — the whole point of the git-based approach.
export default defineConfig({
  output: 'static',
  // Public origin — used to build absolute URLs (canonical, og:*, RSS,
  // sitemap). Change when the portal moves to its production domain.
  site: 'https://astro.isl-dev.grid.cyfronet.pl',
  // Built-in prefetch on every internal link (no per-link attributes needed).
  // Default 'hover' strategy: near-instant navigation without the bandwidth
  // cost of 'viewport' on a 24-card grid; auto-falls back to 'tap' on
  // data-saver / slow connections (Astro handles that).
  prefetch: { prefetchAll: true },
  server: { port: 4321, host: true },
  vite: {
    build: {
      // Lightning CSS (the default minifier) illegally folds animation-timeline
      // INTO the `animation` shorthand (`animation: ... view()`), which browsers
      // reject — silently killing every scroll-driven effect in production.
      // esbuild minifies without property merging.
      cssMinify: 'esbuild',
    },
    server: {
      // Vite blocks unknown Host headers by default; the demo is viewed through an
      // ephemeral cloudflared quick tunnel, so allow any *.trycloudflare.com host.
      allowedHosts: ['.trycloudflare.com'],
    },
  },
});