import { z } from "zod";

export const DateStringSchema = z
  .string()
  .refine((val) => !Number.isNaN(Date.parse(val)), {
    message: "Invalid date string",
  })
  .transform((val) => new Date(val));

export const NullableDateStringSchema = z
  .nullable(z.string())
  .transform((val) => {
    if (val === null || val === "") {
      return null;
    }
    const parsed = new Date(val);
    if (Number.isNaN(parsed.getTime())) {
      return null;
    }
    return parsed;
  });