// Copy the four editable files into Astro's ignored content directory.
// --ensure seeds only a fresh checkout; an incomplete existing set fails loudly.
import { cpSync, existsSync, mkdirSync, readFileSync } from 'node:fs';
import { resolve, join } from 'node:path';
import { fileURLToPath } from 'node:url';

const root = fileURLToPath(new URL('../', import.meta.url));
const examples = JSON.parse(readFileSync(join(root, 'src/data/examples.json'), 'utf8'));
const ensure = process.argv.includes('--ensure');
const source = resolve(process.argv[2] && !ensure ? process.argv[2] : join(root, 'sample-content'));
const pages = join(root, 'src/content/pages');
const uploads = join(root, 'public/uploads');

function validate(directory) {
  for (const { slug } of examples) {
    if (!existsSync(join(directory, `${slug}.md`))) {
      throw new Error(`Missing ${join(directory, `${slug}.md`)}. Run npm run content:setup or npm run content:sync -- <content-clone>.`);
    }
  }
}

if (ensure && existsSync(pages)) {
  validate(pages);
} else {
  validate(join(source, 'pages'));
  if (!existsSync(join(source, 'uploads'))) throw new Error(`Missing uploads directory in ${source}`);
  mkdirSync(pages, { recursive: true });
  mkdirSync(uploads, { recursive: true });
  for (const { slug } of examples) {
    cpSync(join(source, 'pages', `${slug}.md`), join(pages, `${slug}.md`));
  }
  cpSync(join(source, 'uploads'), uploads, { recursive: true });
  console.log(`Example content copied from ${source}`);
}