import { StringSchema } from './types';

const EMAIL_REGEX = /^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$/;
const URL_REGEX = /^(https?:\/\/)?([\da-z.-]+)\.([a-z.]{2,6})([\/\w .-]*)*\/?$/;
const UUID_REGEX = /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i;
const DATE_REGEX = /^\d{4}-\d{2}-\d{2}(T\d{2}:\d{2}:\d{2}(\.\d{3})?Z?)?$/;

export const validators = {
  email: (val: string) => EMAIL_REGEX.test(val),
  url: (val: string) => URL_REGEX.test(val),
  uuid: (val: string) => UUID_REGEX.test(val),
  date: (val: string) => DATE_REGEX.test(val) && !isNaN(Date.parse(val))
};

export function validateStringFormat(value: string, format: StringSchema['format']): string | null {
  if (!format) return null;
  
  const validator = validators[format];
  if (validator && !validator(value)) {
    return `Invalid ${format} format`;
  }
  return null;
}