/**
 * Research Data Validators
 * Pure functions to validate scientific identifiers and form inputs.
 */

// 1. Digital Object Identifier (DOI) Regex
// Matches standard DOI formats (e.g., 10.1038/s41586-021-03491-6)
const DOI_REGEX = /^10.\d{4,9}\/[-._;()/:A-Z0-9]+$/i;

// 2. Email Regex (Standard RFC 5322)
const EMAIL_REGEX = /^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$/;

export const validators = {
  /** Checks if a string is a valid DOI */
  isDOI: (val: string): boolean => DOI_REGEX.test(val.trim()),

  /** Checks if a string is a valid institutional email */
  isEmail: (val: string): boolean => EMAIL_REGEX.test(val),

  /** Ensures PICO instructions aren't just empty whitespace */
  isValidInstructions: (val: string): boolean => val.trim().length >= 10,

  /** Validates PICO Data object from the backend */
  hasCompletePico: (pico: any): boolean => {
    return !!(
      pico?.pico_population &&
      pico?.pico_intervention &&
      pico?.pico_outcome
    );
  }
};