import { build } from 'vite';
import { readFile, writeFile } from 'node:fs/promises';
import { fileURLToPath } from 'node:url';
import { createRequire } from 'node:module';
import { execFileSync } from 'node:child_process';
import path from 'node:path';

const root = fileURLToPath(new URL('./', import.meta.url));
const require = createRequire(import.meta.url);
const manifest = JSON.parse(await readFile(path.join(root, 'package.json'), 'utf8'));
const externals = Object.keys({ ...manifest.dependencies, ...manifest.peerDependencies });

await build({
  configFile: false,
  root,
  publicDir: false,
  build: {
    target: 'es2022',
    outDir: 'dist',
    minify: false,
    lib: { entry: path.join(root, 'src/index.ts'), formats: ['es'], fileName: () => 'index.js' },
    rolldownOptions: {
      external: id => externals.some(dependency => id === dependency || id.startsWith(`${dependency}/`)),
      onwarn(warning, warn) {
        // Restore the client boundary on the final public entry below.
        if (warning.code === 'MODULE_LEVEL_DIRECTIVE') return;
        warn(warning);
      },
    },
  },
});

const typescriptManifest = require.resolve('typescript/package.json');
const typescript = JSON.parse(await readFile(typescriptManifest, 'utf8'));
execFileSync(process.execPath, [
  path.resolve(path.dirname(typescriptManifest), typescript.bin.tsc),
  '-p', path.join(root, 'tsconfig.build.json'),
], { stdio: 'inherit' });

const entry = path.join(root, 'dist/index.js');
await writeFile(entry, `"use client";\n${await readFile(entry, 'utf8')}`);