import type { ZodSchema } from 'zod'
import type { Request, Response, NextFunction, RequestHandler } from 'express'

export const validate = (schema: ZodSchema): RequestHandler =>
  (req: Request, res: Response, next: NextFunction): void => {
    const result = schema.safeParse(req.body)
    if (!result.success) {
      const issues = result.error.issues ?? []
      res.status(400).json({
        error: issues[0]?.message ?? 'Validation failed',
        details: issues,
      })
      return
    }
    req.body = result.data
    next()
  }