// Utility functions for validation
function isValidFullName(name) {
    const words = name.trim().split(/\s+/);
    return /^[A-Za-z]/.test(name) && words.length >= 2;
}

// Main validation function
function validateInput(input, isValidFn) {
    const parent = input.closest('.customer-step-info');
    if (!isValidFn(input.value.trim())) {
        parent.classList.add('error');
    } else {
        parent.classList.remove('error');
    }
    
    validateStepInfo();
}

function isValidTaxID(value) {
    const trimmed = value.trim();
    const regex = /^[A-Za-z0-9@.+-]{5,}$/;
    return regex.test(trimmed);
}

            function validateCuit(cuit) {
  const validTypes = [20, 23, 24, 27, 30, 33, 34];
  const multipliers = [5, 4, 3, 2, 7, 6, 5, 4, 3, 2];
  const number = cuit.replace(/-/g, '').trim();
  if (number.length !== 11) return false;
  const typePrefix = parseInt(number.slice(0, 2), 10);
  if (!validTypes.includes(typePrefix)) return false;
  let sum = 0;
  for (let i = 0; i < 10; i++) {
    sum += parseInt(number[i], 10) * multipliers[i];
  }
  let checksum = 11 - (sum % 11);
  if (checksum === 11) checksum = 0;
  else if (checksum === 10) checksum = 9;
  return checksum === parseInt(number[10], 10);
}

function checkCuit(cuit) {
  const isValid = validateCuit(cuit);
  
  return isValid;
}

function validateStepInfo() {
  const sections = document.querySelectorAll('.customer-step-info');
  let isValid = true;

  sections.forEach(section => {
    // If the section has class 'error', it's invalid
    if (section.classList.contains('error')) {
      isValid = false;
      return;
    }

    // Check if every input in the section has a value
    const inputs = section.querySelectorAll('input');
    inputs.forEach(input => {
      if (!input.value.trim()) {
        isValid = false;
      }
    });
  });

  const submitButton = document.getElementById('step-form-button-submit');
  if (isValid) {
    submitButton.classList.remove('disabled');
  } else {
    submitButton.classList.add('disabled');
  }
}