export class HttpError extends Error {
  constructor(status, message, details = undefined) {
    super(message);
    this.name = 'HttpError';
    this.status = status;
    this.details = details;
  }
}

export function notFoundHandler(req, res, next) {
  next(new HttpError(404, 'Ressource nicht gefunden.'));
}

export function errorHandler(error, req, res, next) {
  if (res.headersSent) return next(error);
  let status = Number.isInteger(error.status) ? error.status : 500;
  if (error.code === 'LIMIT_FILE_SIZE') status = 413;
  if (error.code === 'LIMIT_UNEXPECTED_FILE') status = 400;
  if (status >= 500) console.error(error);
  res.status(status).json({
    error: error.name || 'Error',
    message: status >= 500 ? 'Interner Serverfehler.' : error.message,
    ...(error.details ? { details: error.details } : {})
  });
}