import { defineConfig } from 'vite';
import path from 'path';
import { glob } from 'glob';

// Find component, page, and iframe files to be used as entry points
const entries = glob.sync('src/{components,pages,iframe}/**/*.{ts,tsx}').reduce((acc, file) => {
  const name = file.replace('src/', '').replace(/\.tsx?$/, '');
  acc[name] = path.resolve(__dirname, file);
  return acc;
}, {});

export default defineConfig({
  plugins: [],
  esbuild: {
    jsx: 'transform',
  },
  build: {
    lib: {
      entry: entries,
      formats: ['es'],
      fileName: (format, entryName) => `${entryName}.js`,
    },
    rollupOptions: {
      // Mark React and ReactDOM as external - they'll be provided by the host
      external: ['react', 'react-dom', 'react/jsx-runtime', 'react/jsx-dev-runtime'],
      output: {
        format: 'es',
        // Force .js extensions for entries and chunks
        entryFileNames: (chunkInfo) => `${chunkInfo.name}.js`,
        chunkFileNames: (chunkInfo) => `${chunkInfo.name}.js`,
        assetFileNames: (assetInfo) => `${assetInfo.name ?? '[name]'}[extname]`,
        // Use import maps to resolve React from the global scope
        paths: {
          'react': 'https://esm.sh/react@18',
          'react-dom': 'https://esm.sh/react-dom@18',
          'react/jsx-runtime': 'https://esm.sh/react@18/jsx-runtime',
          'react/jsx-dev-runtime': 'https://esm.sh/react@18/jsx-dev-runtime'
        }
      },
    },
    outDir: 'dist',
    sourcemap: true,
    emptyOutDir: true,
  },
  resolve: {
    alias: {
      // Resolve local UI kit source when building browser-targeted bundles
      '@alga/ui-kit': path.resolve(__dirname, '..', '..', 'server', 'packages', 'ui-kit', 'src'),
    }
  }
});