import { copyFile, mkdir } from 'node:fs/promises';
import { dirname, 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 both clean-URL and directory-index shells for every client-side route.
// The directory copy also supports basic Nginx static configurations that do
// not rewrite missing paths to the root application shell.
await Promise.all(
    browserRoutes.map(async (route) => {
        const routeFile = resolve(outputDirectory, `${route}.html`);
        const routeDirectory = resolve(outputDirectory, route);

        await mkdir(dirname(routeFile), { recursive: true });
        await mkdir(routeDirectory, { recursive: true });
        await copyFile(appShell, routeFile);
        await copyFile(appShell, resolve(routeDirectory, 'index.html'));
    }),
);