import fs from 'fs';
const files = fs.readdirSync('spa-dist/client');
const assets = fs.readdirSync('spa-dist/client/assets');
const toCache = [
	...files
		.filter((f) => {
			return fs.statSync(`spa-dist/client/${f}`).isFile();
		})
		.map((f) => `/convert/${f}`.replace('/index.html', '')),
	...assets
		.filter((f) => {
			if (!fs.statSync(`spa-dist/client/assets/${f}`).isFile()) {
				throw new Error('Unexpected output');
			}
			return true;
		})
		.map((f) => `/convert/assets/${f}`),
];

const result = await Bun.build({
	entrypoints: ['./app/service-worker.ts'],
});

if (!result.success) {
	console.log(result.logs);
	throw new Error('Failed to build service worker');
}

const firstOutput = result.outputs[0];

if (!firstOutput) {
	throw new Error('No output');
}
const text = await firstOutput.text();

const replaced = '$FILES = [];';
if (!text.includes(replaced)) {
	throw new Error('Unexpected output');
}

const cacheNameReplacer = 'CACHE_NAME = "ABCDEF"';

if (!text.includes(cacheNameReplacer)) {
	throw new Error('Unexpected output');
}

const gitRef =
	// eslint-disable-next-line @remotion/deterministic-randomness
	process.env.VERCEL_GIT_COMMIT_SHA || Math.random().toString(36).slice(2);

await Bun.write(
	'spa-dist/client/convert-service-worker.js',
	text
		.replace(replaced, `$FILES = ${JSON.stringify(toCache)};`)
		.replace(cacheNameReplacer, `CACHE_NAME = 'convert-${gitRef}'`),
);