devperf/backend/src/middleware/error-handler.ts

import { Context } from 'hono';
import { HTTPException } from 'hono/http-exception';

export class AppError extends Error {
  constructor(
    public code: number,
    message: string,
    public status: number = 400
  ) {
    super(message);
    this.name = 'AppError';
  }
}

export function errorHandler(err: Error, c: Context) {
  if (err instanceof AppError) {
    return c.json(
      { code: err.code, data: null, message: err.message },
      err.status as any
    );
  }

  if (err instanceof HTTPException) {
    return c.json(
      { code: err.status * 100, data: null, message: err.message },
      err.status
    );
  }

  console.error('Unhandled error:', err);
  return c.json(
    { code: 50001, data: null, message: 'Internal server error' },
    500
  );
}