packages/server/src/middleware/errorHandler.ts

import type { Request, Response, NextFunction } from 'express';
import pino from 'pino';

const logger = pino({ level: 'error' });

export function errorHandler(
  err: Error,
  _req: Request,
  res: Response,
  _next: NextFunction,
) {
  logger.error(err, 'Unhandled error');

  const statusCode = (err as { statusCode?: number }).statusCode || 500;
  const message = err.message || 'Internal Server Error';

  res.status(statusCode).json({
    error: true,
    message,
    ...(process.env.NODE_ENV === 'development' && { stack: err.stack }),
  });
}