import { promises as fs } from 'node:fs';
import path from 'node:path';
import { fileURLToPath } from 'node:url';

const SITE_URL = (process.env.SITE_URL ?? 'https://wsap.dev').replace(/\/+$/, '');
const STATIC_ROUTES = ['/', '/about', '/apps'];

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
const projectRoot = path.resolve(__dirname, '..');
const postsDir = path.join(projectRoot, 'src', 'posts');
const sitemapPath = path.join(projectRoot, 'static', 'sitemap.txt');

async function getPostRoutes(): Promise<string[]> {
    const files = await fs.readdir(postsDir);

    return files
        .filter((file) => file.endsWith('.svx'))
        .map((file) => `/posts/${file.replace(/\.svx$/, '')}`)
        .sort();
}

async function main(): Promise<void> {
    const postRoutes = await getPostRoutes();
    const urls = [...STATIC_ROUTES, ...postRoutes].map((route) => `${SITE_URL}${route}`);
    const body = `${urls.join('\n')}\n`;

    await fs.writeFile(sitemapPath, body, 'utf8');
    console.log(`Generated sitemap: ${path.relative(projectRoot, sitemapPath)} (${urls.length} URLs)`);
}

main().catch((error: unknown) => {
    console.error('Failed to generate sitemap.txt');
    console.error(error);
    process.exit(1);
});