import { defineConfig } from 'vite';
import wasm from 'vite-plugin-wasm';
import { fileURLToPath, URL } from 'node:url';
import { resolve } from 'path';
import type { Plugin } from 'vite';

// Plugin to handle Service Worker in dev and build
function serviceWorkerPlugin(): Plugin {
  const swPath = resolve(__dirname, 'src/service-workers/network.sw.ts');
  const swUrl = '/src/service-workers/network.sw.ts';
  
  return {
    name: 'service-worker-plugin',
    enforce: 'pre', // Run before other plugins
    configureServer(server) {
      // In dev mode, serve the Service Worker from src
      server.middlewares.use('/network.sw.js', async (req, res, next) => {
        console.log('[Service Worker Plugin] Request for /network.sw.js');
        try {
          // Try using the URL format that Vite expects
          let result = await server.transformRequest(swUrl, { ssr: false });
          
          // If that doesn't work, try with the file path
          if (!result || !result.code) {
            console.log('[Service Worker Plugin] Trying with file path...');
            result = await server.transformRequest(swPath, { ssr: false });
          }
          
          if (result && result.code) {
            console.log('[Service Worker Plugin] Successfully transformed Service Worker');
            res.setHeader('Content-Type', 'application/javascript');
            res.setHeader('Service-Worker-Allowed', '/');
            res.setHeader('Cache-Control', 'no-cache');
            res.end(result.code);
            return;
          }
          
          // Final fallback: use pluginContainer directly
          console.log('[Service Worker Plugin] Fallback: using pluginContainer.transform');
          const { readFileSync } = await import('fs');
          const code = readFileSync(swPath, 'utf-8');
          const transformed = await server.pluginContainer.transform(code, swUrl);
          
          if (transformed && transformed.code) {
            console.log('[Service Worker Plugin] Successfully transformed via pluginContainer');
            res.setHeader('Content-Type', 'application/javascript');
            res.setHeader('Service-Worker-Allowed', '/');
            res.setHeader('Cache-Control', 'no-cache');
            res.end(transformed.code);
          } else {
            console.error('[Service Worker Plugin] Failed to transform Service Worker');
            res.statusCode = 500;
            res.end('Failed to load Service Worker');
          }
        } catch (err) {
          console.error('[Service Worker Plugin] Error serving SW:', err);
          if (err instanceof Error) {
            console.error('[Service Worker Plugin] Error details:', err.stack);
          }
          res.statusCode = 500;
          res.end(`Service Worker error: ${err instanceof Error ? err.message : String(err)}`);
        }
      });
    },
  };
}

export default defineConfig({
  // Configuration du serveur de développement
  server: {
    port: 3003,
    host: '0.0.0.0', // Permet l'accès depuis l'extérieur (Docker/Réseau)
    allowedHosts: ['dev3.4nkweb.com'],
    proxy: {
      // Proxy pour le stockage
      '/storage': {
        target: process.env.VITE_STORAGEURL || 'https://dev3.4nkweb.com',
        changeOrigin: true,
        secure: false, // Accepte les certificats auto-signés si besoin
        rewrite: (path) => path.replace(/^\/storage/, '/storage'),
      },
      // Proxy pour les websockets (si besoin de contourner CORS ou SSL)
      '/ws': {
        target: process.env.VITE_BOOTSTRAPURL?.replace('ws', 'http') || 'https://dev3.4nkweb.com',
        ws: true,
        changeOrigin: true,
        secure: false,
      },
      // Proxy pour l'API BlindBit
      '/blindbit': {
        target: process.env.VITE_BLINDBITURL || 'https://dev3.4nkweb.com/blindbit',
        changeOrigin: true,
        secure: false,
        rewrite: (path) => path.replace(/^\/blindbit/, ''),
      },
    },
  },

  // Plugins essentiels
  plugins: [
    wasm(), // Indispensable pour ton SDK Rust
    serviceWorkerPlugin(), // Service Worker handler
  ],

  // Alias pour les imports (ex: import ... from '@/services/...')
  resolve: {
    alias: {
      '@': fileURLToPath(new URL('./src', import.meta.url)),
      '~': fileURLToPath(new URL('./src', import.meta.url)), // Rétro-compatibilité avec tes anciens imports
    },
  },

  // Configuration du Build
  build: {
    target: 'esnext', // Nécessaire pour le "Top Level Await" souvent utilisé avec WASM
    outDir: 'dist',
    assetsDir: 'assets',
    emptyOutDir: true, // Vide le dossier dist avant chaque build
    rollupOptions: {
      input: {
        main: resolve(__dirname, 'index.html'),
        'network.sw': resolve(__dirname, 'src/service-workers/network.sw.ts'),
      },
      output: {
        entryFileNames: (chunkInfo) => {
          return chunkInfo.name === 'network.sw' ? 'network.sw.js' : 'assets/[name]-[hash].js';
        },
      },
    },
  },

  // Configuration spécifique pour les Workers (Database)
  worker: {
    format: 'es',
    plugins: () => [wasm()],
  },
});