import { readFile, writeFile } from 'node:fs/promises';

import { createGenerator } from 'unocss';

import config from '../uno.config.mjs';

const generator = await createGenerator(config);
const iconSource = await readFile(new URL('../src/lib/icons.ts', import.meta.url), 'utf8');
const { css } = await generator.generate(iconSource, { preflights: false });

if (!css.trim()) {
	throw new Error('UnoCSS did not generate any icons from src/lib/icons.ts');
}

await writeFile(
	new URL('../src/lib/styles/icons.css', import.meta.url),
	`/* Generated by \`pnpm icons:generate\`. Do not edit directly. */\n${css}\n`
);