import { Request, Response, NextFunction } from 'express';
import { AnyZodObject, ZodError } from 'zod';

export const validate = (schema: AnyZodObject) => {
  return async (req: Request, res: Response, next: NextFunction) => {
    try {
      const parsed = await schema.parseAsync({
        body: req.body,
        query: req.query,
        params: req.params,
      });
      
      if (parsed.body !== undefined) req.body = parsed.body;
      if (parsed.query !== undefined) req.query = parsed.query;
      if (parsed.params !== undefined) req.params = parsed.params;
      
      return next();
    } catch (error) {
      if (error instanceof ZodError) {
        return res.status(400).json({
          sukses: false,
          pesan: 'Validasi input gagal',
          errors: error.errors.map((err) => ({
            field: err.path.slice(1).join('.'),
            message: err.message,
          })),
        });
      }
      return next(error);
    }
  };
};