import { defineConfig } from 'astro/config';
import tailwind from '@astrojs/tailwind';
import node from '@astrojs/node';
import preact from "@astrojs/preact";

export default defineConfig({
  site: "https://fuz.dariuszm.eu", 
  output: 'server',
  
  adapter: node({
    mode: "standalone"
  }),
  
  server: {
    host: process.env.HOST || '0.0.0.0',
    port: parseInt(process.env.PORT || '4321'),
  },
  
  // ✅ Build optimizations
  build: {
    inlineStylesheets: 'auto',  // Inline małe CSS-y (<4KB)
  },
  
  vite: {
    build: {
      minify: "esbuild",        // ✅ Minifikacja JS
      cssMinify: true,          // ✅ Minifikacja CSS (zmienione z "esbuild" na true)
      
      // ✅ Rollup optimizations
      rollupOptions: {
        output: {
          // Lepsze nazwy plików z hashami
          assetFileNames: 'assets/[name].[hash][extname]',
          chunkFileNames: 'chunks/[name].[hash].js',
          entryFileNames: 'entry/[name].[hash].js',
          
          // ✅ Code splitting - Preact w osobnym bundle
          manualChunks: (id) => {
            if (id.includes('node_modules')) {
              if (id.includes('preact')) {
                return 'vendor-preact';
              }
              if (id.includes('marked')) {
                return 'vendor-marked';
              }
              return 'vendor';
            }
          },
        },
      },
      
      // ✅ Chunk size warnings (opcjonalne)
      chunkSizeWarningLimit: 500, // KB
    },
    
    // ✅ CSS optimization dla Tailwind
    // css: {
    //   transformer: 'lightningcss', // Szybszy CSS transformer npm install -D lightningcss
    // },
  },
  
  // ✅ HTML compression
  compressHTML: true,
  
  integrations: [
    preact({
      compat: true  // ✅ Jeśli używasz React bibliotek
    }),
    tailwind({
      applyBaseStyles: true
    })
  ]
});