import crypto from 'node:crypto';
import fs from 'node:fs';
import path from 'node:path';

const DEFAULT_ASSET_ROOTS = [
  '/usr/share/nginx/html',
  path.resolve(process.cwd(), 'dist'),
];

function cleanRelease(value) {
  const release = String(value || '').trim();
  if (!release || release === 'unknown' || release.length > 128) return null;
  return release;
}

export function deployedRelease(env = process.env) {
  return cleanRelease(env.APP_RELEASE) || cleanRelease(env.SOURCE_COMMIT);
}

export function frontendAssetInfo(roots = DEFAULT_ASSET_ROOTS) {
  for (const root of roots) {
    try {
      const indexPath = path.join(root, 'index.html');
      const html = fs.readFileSync(indexPath, 'utf8');
      const match = html.match(/<script[^>]+src=["']([^"']*\/assets\/[^"']+\.js(?:\?[^"']*)?)["']/i);
      if (!match) continue;
      const publicPath = new URL(match[1], 'https://ihaleist.invalid/').pathname;
      const assetPath = path.resolve(root, `.${publicPath}`);
      const rootPath = path.resolve(root) + path.sep;
      if (!assetPath.startsWith(rootPath)) continue;
      const bytes = fs.readFileSync(assetPath);
      return {
        path: publicPath,
        sha256: crypto.createHash('sha256').update(bytes).digest('hex'),
        bytes: bytes.length,
      };
    } catch {
      // Bu kökte derlenmiş arayüz yoksa sıradaki olası köke bakılır.
    }
  }
  return null;
}

export function releaseInfo({ env = process.env, roots = DEFAULT_ASSET_ROOTS } = {}) {
  return {
    release: deployedRelease(env),
    version: '1.0.0',
    frontendAsset: frontendAssetInfo(roots),
  };
}