interface ParsedEmailAddressType {
  originalValue: string;
  username: string;
  domain: string;
  isValid: boolean;
}

const emailRegex = /^[a-zA-Z0-9._%+-]+@([a-zA-Z0-9.-]+\.[a-zA-Z]{2,})$/;

export function parseEmailAddress(email: string): ParsedEmailAddressType {
  // Normalize the email to lowercase
  email = email?.toLowerCase() ?? '';

  const isValid = emailRegex.test(email);
  if (!isValid) {
    return {
      originalValue: email,
      username: '',
      domain: '',
      isValid: false,
    };
  }

  const [username, domain] = email.split('@');

  return {
    originalValue: email,
    username,
    domain,
    isValid: true,
  };
}