import { copyFile, mkdir } from 'node:fs/promises';
import { resolve } from 'node:path';

const root = process.cwd();
const outputDirectory = resolve(root, 'dist');
const serverDirectory = resolve(root, 'dist', 'server');
const appShell = resolve(outputDirectory, 'index.html');
const browserRoutes = [
    'encryption',
    'privacy',
    'proto',
    'proto/docs',
    'support',
    'terms',
];

await mkdir(serverDirectory, { recursive: true });
await copyFile(
    resolve(root, 'worker', 'index.js'),
    resolve(serverDirectory, 'index.js'),
);

// Emit an extensionless HTML match for every client-side route. This keeps
// browser refreshes working even when the asset layer handles navigations
// before the Worker gets a chance to return the SPA fallback.
await Promise.all(
    browserRoutes.map(async (route) => {
        const routeFile = resolve(outputDirectory, `${route}.html`);
        await mkdir(resolve(routeFile, '..'), { recursive: true });
        await copyFile(appShell, routeFile);
    }),
);