function requireEnv(name: string): string {
  const value = process.env[name];
  if (!value) {
    throw new Error(`Не задана переменная окружения ${name}`);
  }
  return value;
}

export const config = {
  tenantId: requireEnv('GRAPH_TENANT_ID'),
  clientId: requireEnv('GRAPH_CLIENT_ID'),
  certPath: requireEnv('GRAPH_CERT_PATH'),
  keyPath: requireEnv('GRAPH_KEY_PATH'),
  scope: process.env.GRAPH_SCOPE ?? 'https://graph.microsoft.com/.default',
  port: Number(process.env.PORT ?? 3000)
};