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

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

/** Keep peer/runtime deps out of published dist (including subpaths like @tamagui/config/v3). */
function isExternal(id) {
  if (id === 'react' || id === 'react/jsx-runtime' || id === 'react-dom' || id === 'react-dom/client') {
    return true;
  }
  if (id === 'tamagui' || id.startsWith('tamagui/')) return true;
  if (id.startsWith('@tamagui/')) return true;
  return false;
}

export default defineConfig({
  plugins: [
    react(),
    dts({
      tsconfigPath: './tsconfig.json',
      insertTypesEntry: true,
      include: ['src/**/*.js', 'src/**/*.jsx'],
      exclude: ['**/*.test.*', '**/test/**']
    })
  ],
  build: {
    lib: {
      entry: path.resolve(__dirname, 'src/index.js'),
      formats: ['es']
    },
    rollupOptions: {
      external: isExternal,
      output: {
        // Preserve module structure - automatically preserves directory structure
        preserveModules: true,
        preserveModulesRoot: 'src',
        // Use original file names and paths
        entryFileNames: '[name].js',
        chunkFileNames: '[name].js'
      }
    },
    outDir: 'dist',
    emptyOutDir: true,
    sourcemap: true
  }
});