// Bundles the extension's TypeScript entry points into dist/ for Firefox to load.
//
// Runs on `npm run build` and, via the `prepare` script, on every `npm ci` — so CI's
// `web-ext lint` (which needs the referenced bundles to exist) works without a separate
// build step. Firefox-only: no polyfill, native ESM, `browser.*` is a global.

import { build } from 'esbuild';
import { rm, mkdir } from 'node:fs/promises';
import { fileURLToPath } from 'node:url';
import { dirname, resolve } from 'node:path';

const root = resolve(dirname(fileURLToPath(import.meta.url)), '..');
const outdir = resolve(root, 'dist');

// One entry per manifest surface. Add popup/options/content here as they land.
const entryPoints = {
  background: resolve(root, 'src/background/index.ts'),
};

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

const watch = process.argv.includes('--watch');
const dev = watch || process.argv.includes('--dev');

const options = {
  entryPoints,
  outdir,
  bundle: true,
  format: 'esm',
  target: ['firefox128'],
  platform: 'browser',
  sourcemap: dev ? 'inline' : 'linked',
  minify: !dev,
  logLevel: 'info',
  // A bare `import ... from 'ws'` etc. must never reach a bundle — fail loud if one does.
  external: [],
};

if (watch) {
  const ctx = await (await import('esbuild')).context(options);
  await ctx.watch();
  console.log('esbuild: watching');
} else {
  await build(options);
}