/**
 * Copies story assets (images, etc.) from content/stories/<slug>/
 * into static/stories/<slug>/ so they're available as static files
 * during the build.
 *
 * Run before `vite build`: node scripts/copy-assets.js
 */

import { readdirSync, cpSync, existsSync, mkdirSync, statSync } from 'node:fs';
import { join, resolve } from 'node:path';

const CONTENT_DIR = resolve('public/stories');
const STATIC_DIR = resolve('static/stories');

if (!existsSync(CONTENT_DIR)) {
  console.log('No content/stories directory found, skipping asset copy.');
  process.exit(0);
}

if (!existsSync(STATIC_DIR)) {
  mkdirSync(STATIC_DIR, { recursive: true });
}

const slugs = readdirSync(CONTENT_DIR, { withFileTypes: true })
  .filter((d) => d.isDirectory())
  .map((d) => d.name);

let copied = 0;

for (const slug of slugs) {
  const storyDir = join(CONTENT_DIR, slug);
  const destDir = join(STATIC_DIR, slug);

  const entries = readdirSync(storyDir, { withFileTypes: true });

  for (const entry of entries) {
    // Skip the .aml file itself
    if (entry.name.endsWith('.aml')) continue;

    const srcPath = join(storyDir, entry.name);
    const destPath = join(destDir, entry.name);

    if (!existsSync(destDir)) {
      mkdirSync(destDir, { recursive: true });
    }

    if (entry.isDirectory()) {
      cpSync(srcPath, destPath, { recursive: true });
      copied++;
    } else if (entry.isFile()) {
      const srcStat = statSync(srcPath);
      // Only copy if dest doesn't exist or is older
      if (!existsSync(destPath) || statSync(destPath).mtimeMs < srcStat.mtimeMs) {
        cpSync(srcPath, destPath);
        copied++;
      }
    }
  }
}

console.log(`Copied ${copied} asset(s) from ${slugs.length} story folder(s).`);