import { defineConfig } from 'vite';
import react from '@vitejs/plugin-react';
import path from 'path';

export default defineConfig({
  plugins: [react()],
  resolve: {
    alias: {
      '@': path.resolve(__dirname, './src'),
    },
  },
  build: {
    rollupOptions: {
      output: {
        // AS-1: Split large dependencies into separate chunks for better caching
        manualChunks: {
          'vendor-react': ['react', 'react-dom', 'react-router-dom'],
          'vendor-query': ['@tanstack/react-query'],
          'vendor-fullcalendar': [
            '@fullcalendar/react',
            '@fullcalendar/core',
            '@fullcalendar/daygrid',
            '@fullcalendar/timegrid',
            '@fullcalendar/interaction',
          ],
          'vendor-ui': ['sonner', 'lucide-react', 'date-fns'],
        },
      },
    },
  },
  server: {
    port: 5173,
    proxy: {
      '/api': {
        target: 'http://localhost:8000',
        changeOrigin: true,
      },
    },
  },
});