/**
 * Validation utility functions
 */

/**
 * Check if value is empty
 */
export function isEmpty(value: unknown): boolean {
  if (value === null || value === undefined) return true;
  if (typeof value === 'string') return value.trim().length === 0;
  if (Array.isArray(value)) return value.length === 0;
  if (typeof value === 'object') return Object.keys(value).length === 0;
  return false;
}

/**
 * Check if value is not empty
 */
export function isNotEmpty(value: unknown): boolean {
  return !isEmpty(value);
}

/**
 * Check if email is valid
 */
export function isValidEmail(email: string): boolean {
  const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
  return emailRegex.test(email);
}

/**
 * Check if URL is valid
 */
export function isValidUrl(url: string): boolean {
  try {
    new URL(url);
    return true;
  } catch {
    return false;
  }
}

/**
 * Check if string is numeric
 */
export function isNumeric(str: string): boolean {
  return !isNaN(Number(str)) && !isNaN(parseFloat(str));
}