// Build the single-file CDN bundle: everything a browser needs as one
// minified ES module, for import-map use against any static host that
// serves JavaScript with the right MIME type.
//
//   npm run bundle       →  dist-cdn/buuh.js (+ sourcemap)
//
//   <script type="importmap">
//     { "imports": { "buuh": "https://cdn.uhhm.no/buuh@8.0.0.js" } }
//   </script>
//   <script type="module">
//     import { choo, html } from 'buuh'
//   </script>

import { build } from 'vite'
import { readFile } from 'node:fs/promises'
import { join, dirname, resolve } from 'node:path'
import { fileURLToPath } from 'node:url'

const root = resolve(dirname(fileURLToPath(import.meta.url)), '..')
const { version } = JSON.parse(await readFile(join(root, 'packages/core/package.json'), 'utf8'))

const VIRTUAL = '\0bundle:entry'

await build({
  appType: 'custom',
  logLevel: 'warn',
  plugins: [{
    name: 'bundle-entry',
    resolveId: (id) => id === 'bundle:entry' ? VIRTUAL : undefined,
    load: (id) => id === VIRTUAL
      ? [
          "export { default as choo, Choo, lazy } from '@uhhm/buuh'",
          "export { default as html } from '@uhhm/buuh-html'",
          "export { default as raw } from '@uhhm/buuh-html/raw'",
          "export { default as morph } from '@uhhm/buuh-html/morph'",
          "export { default as hydrate } from '@uhhm/buuh-html/hydrate'",
          "export { default as Component } from '@uhhm/buuh-component'",
          "export { default as devtools } from '@uhhm/buuh-devtools'"
        ].join('\n')
      : undefined
  }],
  build: {
    outDir: join(root, 'dist-cdn'),
    emptyOutDir: true,
    sourcemap: true,
    lib: false,
    rollupOptions: {
      input: { buuh: 'bundle:entry' },
      output: { entryFileNames: 'buuh.js' },
      preserveEntrySignatures: 'strict'
    }
  }
})

console.log(`bundled buuh ${version} → dist-cdn/buuh.js`)