d8d-vite-starter/src/server/utils/errorHandler.ts

import { Context } from 'hono'
import { z } from '@hono/zod-openapi'
import { HTTPException } from 'hono/http-exception'

export const ErrorSchema = z.object({
  code: z.number().openapi({
    example: 400,
  }),
  message: z.string().openapi({
    example: 'Bad Request',
  }),
})

export const errorHandler = async (err: Error, c: Context) => {
  if (err instanceof HTTPException) {
    const details = err.cause ? { details: err.cause instanceof Error ? err.cause.message : err.cause } : {} 
    return c.json(
      { 
        code: err.status,
        message: err.message,
        ...details
      },
      err.status
    )
  }

  return c.json(
    { 
      code: 500,
      message: err.message || 'Internal Server Error'
    },
    500
  )
}