import {build} from 'esbuild';
import {mkdir, rm, readFile} from 'node:fs/promises';
import {join, resolve} from 'node:path';

const root = process.cwd();
const publicRoot = join(root, 'public');
const workerRoot = join(publicRoot, 'tts', 'piper-wasm-v1');

await rm(workerRoot, {recursive: true, force: true});
await mkdir(workerRoot, {recursive: true});

await build({
  entryPoints: [resolve(root, 'piper-runtime.js')],
  outfile: join(publicRoot, 'piper-runtime.js'),
  bundle: true,
  format: 'iife',
  platform: 'browser',
  target: ['es2022'],
  external: ['fs', 'path'],
  sourcemap: false,
  legalComments: 'none',
});

await build({
  entryPoints: [resolve(root, 'piper-worker.js')],
  outfile: join(workerRoot, 'piper-worker.js'),
  bundle: true,
  format: 'esm',
  platform: 'browser',
  target: ['es2022'],
  external: ['fs', 'path'],
  sourcemap: false,
  legalComments: 'none',
});

const workerBundle = await readFile(join(workerRoot, 'piper-worker.js'), 'utf8');
for (const route of [
  'https://huggingface.co/diffusionstudio/piper-voices/resolve/main/',
  '/static/piper-wasm-v1',
  '/static/piper-wasm-v1/voices/',
  '/static/piper-wasm-v1/onnx/',
]) {
  if (!workerBundle.includes(route)) throw new Error(`The Piper worker is missing static route ${route}`);
}

console.log(`Piper worker bundle prepared at ${workerRoot}`);