import { cp, mkdir, rm, stat, writeFile } from 'node:fs/promises';
import { dirname, join } from 'node:path';
import { fileURLToPath } from 'node:url';

const rootDir = join(dirname(fileURLToPath(import.meta.url)), '..');
const distDir = join(rootDir, 'dist');

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

await copyRequired('index.html');
await copyRequired('poster.jpg');
await copyRequired('test-pages');
await copyRequired('vr180player');
await copyOptional('media');

await writeFile(
	join(distDir, '_headers'),
	[
		'/vr180player/*',
		'  Cache-Control: public, max-age=3600',
		'',
		'/*',
		'  Cache-Control: public, max-age=300',
		''
	].join('\n')
);

console.log(`Built test app in ${distDir}`);

async function copyRequired(relativePath) {
	const source = join(rootDir, relativePath);
	const target = join(distDir, relativePath);
	await cp(source, target, { recursive: true });
}

async function copyOptional(relativePath) {
	const source = join(rootDir, relativePath);
	if (!await pathExists(source)) {
		console.warn(`Optional ${relativePath}/ directory not found; bundled sample media will not be included.`);
		return;
	}

	await cp(source, join(distDir, relativePath), { recursive: true });
}

async function pathExists(path) {
	try {
		await stat(path);
		return true;
	} catch (error) {
		if (error?.code === 'ENOENT') {
			return false;
		}

		throw error;
	}
}