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

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);

export default defineConfig(() => {
  return {
    define: {
      'process.env.GOOGLE_MAPS_PLATFORM_KEY': JSON.stringify(process.env.GOOGLE_MAPS_PLATFORM_KEY || '')
    },
    plugins: [react(), tailwindcss()],
    resolve: {
      alias: {
        '@': path.resolve(__dirname, '.'),
        'firebase/firestore': path.resolve(__dirname, './src/lib/mock-firestore.ts'),
        'firebase/storage': path.resolve(__dirname, './src/lib/mock-storage.ts'),
      },
    },
    server: {
      // HMR is disabled in AI Studio via DISABLE_HMR env var.
      // Do not modify—file watching is disabled to prevent flickering during agent edits.
      hmr: process.env.DISABLE_HMR !== 'true',
      // Disable file watching when DISABLE_HMR is true to save CPU during agent edits.
      watch: process.env.DISABLE_HMR === 'true' ? null : {},
    },
    build: {
      chunkSizeWarningLimit: 2000,
      rollupOptions: {
        input: {
          main: path.resolve(__dirname, 'index.html')
        },
        output: {
          manualChunks(id) {
            if (id.includes('node_modules')) {
              return 'vendor';
            }
          }
        }
      }
    }
  };
});