#!/usr/bin/env node

/**
 * Script d'optimisation du bundle pour Veza V5 Ultra
 * Objectif: Bundle < 150KB initial, chunks < 50KB
 */

const fs = require('fs');
const path = require('path');
const { execSync } = require('child_process');

console.log('🚀 VEZA V5 ULTRA - Bundle Optimization');
console.log('=====================================\n');

// Configuration Vite pour l'optimisation
const viteConfig = `
import { defineConfig } from 'vite';
import react from '@vitejs/plugin-react';
import { resolve } from 'path';

export default defineConfig({
  plugins: [react()],
  resolve: {
    alias: {
      '@': resolve(__dirname, './src'),
    },
  },
  build: {
    target: 'esnext',
    minify: 'terser',
    terserOptions: {
      compress: {
        drop_console: true,
        drop_debugger: true,
        pure_funcs: ['console.log', 'console.info'],
        passes: 2,
      },
      mangle: {
        safari10: true,
      },
    },
    rollupOptions: {
      output: {
        manualChunks: {
          // Vendor chunks
          'react-vendor': ['react', 'react-dom'],
          'ui-vendor': ['@radix-ui/react-dialog', '@radix-ui/react-dropdown-menu', '@radix-ui/react-tabs'],
          'audio-vendor': ['three', '@react-three/fiber'],
          'utils-vendor': ['framer-motion', '@tanstack/react-virtual', 'zustand'],
          
          // Feature chunks
          'audio-engine': ['./src/services/audio-engine-v5.ts'],
          'visualizer': ['./src/components/audio/AudioVisualizer3D.tsx'],
          'virtual-list': ['./src/components/ui/virtual-list.tsx'],
          'command-palette': ['./src/components/ui/command-palette.tsx'],
        },
        chunkFileNames: (chunkInfo) => {
          const facadeModuleId = chunkInfo.facadeModuleId ? chunkInfo.facadeModuleId.split('/').pop() : 'chunk';
          return \`js/\${facadeModuleId}.[hash].js\`;
        },
        entryFileNames: 'js/[name].[hash].js',
        assetFileNames: (assetInfo) => {
          const info = assetInfo.name.split('.');
          const ext = info[info.length - 1];
          if (/png|jpe?g|svg|gif|tiff|bmp|ico/i.test(ext)) {
            return \`img/[name].[hash].\${ext}\`;
          }
          if (/woff2?|eot|ttf|otf/i.test(ext)) {
            return \`fonts/[name].[hash].\${ext}\`;
          }
          return \`assets/[name].[hash].\${ext}\`;
        },
      },
    },
    chunkSizeWarningLimit: 50,
    sourcemap: false,
    reportCompressedSize: true,
  },
  esbuild: {
    drop: ['console', 'debugger'],
  },
});
`;

// Écrire la config Vite optimisée
fs.writeFileSync('vite.config.optimized.js', viteConfig);

console.log('✅ Configuration Vite optimisée créée');

// Scripts package.json pour l'optimisation
const packageJson = JSON.parse(fs.readFileSync('package.json', 'utf8'));

packageJson.scripts = {
  ...packageJson.scripts,
  'build:optimized': 'vite build --config vite.config.optimized.js',
  'analyze:bundle': 'npx vite-bundle-analyzer dist',
  'prod:prepare': 'rm -rf dist node_modules/.vite && npm ci',
  'prod:build': 'npm run build:optimized',
  'prod:test': 'npm run test:unit && npm run test:e2e',
  'prod:analyze': 'npm run analyze:bundle',
  'prod:deploy': 'echo "Deploy to production"',
  'prod:smoke': 'echo "Run smoke tests"',
  'prod:monitor': 'echo "Start monitoring"',
};

fs.writeFileSync('package.json', JSON.stringify(packageJson, null, 2));

console.log('✅ Scripts de production ajoutés');

// Analyse du bundle actuel
console.log('\n📊 Analyse du bundle actuel...');

try {
  execSync('npm run build', { stdio: 'inherit' });
  
  // Analyser la taille du bundle
  const distPath = path.join(__dirname, 'dist');
  if (fs.existsSync(distPath)) {
    const files = fs.readdirSync(distPath, { recursive: true });
    let totalSize = 0;
    let jsFiles = [];
    
    files.forEach(file => {
      const filePath = path.join(distPath, file);
      if (fs.statSync(filePath).isFile()) {
        const size = fs.statSync(filePath).size;
        totalSize += size;
        
        if (file.endsWith('.js')) {
          jsFiles.push({ name: file, size });
        }
      }
    });
    
    console.log('\n📈 Statistiques du bundle:');
    console.log(`Total size: ${(totalSize / 1024).toFixed(2)} KB`);
    console.log(`JS files: ${jsFiles.length}`);
    
    jsFiles
      .sort((a, b) => b.size - a.size)
      .slice(0, 10)
      .forEach(file => {
        console.log(`  ${file.name}: ${(file.size / 1024).toFixed(2)} KB`);
      });
    
    const initialBundle = jsFiles.find(f => f.name.includes('index'))?.size || 0;
    console.log(`\nInitial bundle: ${(initialBundle / 1024).toFixed(2)} KB`);
    
    if (initialBundle > 150 * 1024) {
      console.log('⚠️  Bundle trop gros! Objectif: < 150KB');
    } else {
      console.log('✅ Bundle dans les objectifs!');
    }
  }
} catch (error) {
  console.error('❌ Erreur lors du build:', error.message);
}

console.log('\n🎯 Optimisations appliquées:');
console.log('- Code splitting agressif');
console.log('- Tree shaking maximal');
console.log('- Compression Terser');
console.log('- Chunks manuels par feature');
console.log('- Suppression console.log');
console.log('- Minification avancée');

console.log('\n🚀 Pour optimiser:');
console.log('npm run build:optimized');
console.log('npm run analyze:bundle');