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

export class ApiError extends Error {
  constructor(
    public readonly status: number,
    message: string,
  ) {
    super(message);
  }
}

export function errorHandler(
  error: unknown,
  _req: Request,
  res: Response,
  _next: NextFunction,
): void {
  if (error instanceof ApiError) {
    res.status(error.status).json({
      code: error.status,
      message: error.message,
      data: null,
    });
    return;
  }

  console.error(error);
  res.status(500).json({
    code: 500,
    message: 'Internal server error',
    data: null,
  });
}