// TODO: use temporal

import { z } from "zod";

export const validDateTimeSchema = z
  .union([z.string(), z.date(), z.number()])
  .refine((input) => {
    const inputAsDate = new Date(input);
    if (!isValidDateTime(inputAsDate)) {
      return false;
    }

    return true;
  })
  .transform((input): string => new Date(input).toISOString())
  .brand<"ValidDateTime">();

export const validDateSchema = z
  .string()
  .refine((input) => {
    if (!isValidDate(input)) {
      return false;
    }

    return true;
  })
  .brand<"ValidDateTime">();

export type ValidDateTime = z.infer<typeof validDateTimeSchema>;
export type ValidDate = z.infer<typeof validDateSchema>;

function isValidDateTime(input: Date): boolean {
  return !Number.isNaN(input.getTime());
}

function isValidDate(input: string): boolean {
  return /^\d{4}-\d{2}-\d{2}$/.test(input) && isValidDateTime(new Date(input));
}