import {
  generateRegistrationOptions,
  verifyRegistrationResponse,
  generateAuthenticationOptions,
  verifyAuthenticationResponse,
} from '@simplewebauthn/server';
import type {
  GenerateRegistrationOptionsOpts,
  VerifyRegistrationResponseOpts,
  GenerateAuthenticationOptionsOpts,
  VerifyAuthenticationResponseOpts,
} from '@simplewebauthn/server';
import type { NextRequest } from 'next/server';

export const RP_NAME = 'ServerMon';

/**
 * Get the expected origin from the request.
 * Accounts for reverse proxies and environment.
 */
export function getOrigin(req: NextRequest): string {
  const host = req.headers.get('host') || 'localhost';
  const proto =
    req.headers.get('x-forwarded-proto') ||
    (process.env.NODE_ENV === 'production' ? 'https' : 'http');
  return `${proto}://${host}`;
}

/**
 * Get the RP ID (domain) from the request host.
 */
export function getRPID(host: string): string {
  return host.split(':')[0];
}

/**
 * Generate options for a user to register a new passkey.
 */
export async function getPasskeyRegistrationOptions(options: GenerateRegistrationOptionsOpts) {
  return await generateRegistrationOptions(options);
}

/**
 * Verify the registration response from the client.
 */
export async function verifyPasskeyRegistration(options: VerifyRegistrationResponseOpts) {
  return await verifyRegistrationResponse(options);
}

/**
 * Generate options for a user to log in with a passkey.
 */
export async function getPasskeyLoginOptions(options: GenerateAuthenticationOptionsOpts) {
  return await generateAuthenticationOptions(options);
}

/**
 * Verify the authentication response from the client.
 */
export async function verifyPasskeyLogin(options: VerifyAuthenticationResponseOpts) {
  return await verifyAuthenticationResponse(options);
}