import * as fs from 'fs';
import * as path from 'path';
import { fileURLToPath } from 'url';
import type { Certificates } from '../models/certificate-types.js';

const __dirname = path.dirname(fileURLToPath(import.meta.url));

/**
 * Loads the default SSL certificates from the assets directory
 * @returns The certificate key pair
 */
export function loadDefaultCertificates(): Certificates {
  try {
    // Need to adjust path from /ts/certificate/utils to /assets/certs
    const certPath = path.join(__dirname, '..', '..', '..', 'assets', 'certs');
    const privateKey = fs.readFileSync(path.join(certPath, 'key.pem'), 'utf8');
    const publicKey = fs.readFileSync(path.join(certPath, 'cert.pem'), 'utf8');

    if (!privateKey || !publicKey) {
      throw new Error('Failed to load default certificates');
    }

    return {
      privateKey,
      publicKey
    };
  } catch (error) {
    console.error('Error loading default certificates:', error);
    throw error;
  }
}

/**
 * Checks if a certificate file exists at the specified path
 * @param certPath Path to check for certificate
 * @returns True if the certificate exists, false otherwise
 */
export function certificateExists(certPath: string): boolean {
  return fs.existsSync(certPath);
}

/**
 * Ensures the certificate directory exists
 * @param dirPath Path to the certificate directory
 */
export function ensureCertificateDirectory(dirPath: string): void {
  if (!fs.existsSync(dirPath)) {
    fs.mkdirSync(dirPath, { recursive: true });
  }
}