/**
 * UserCard utility functions for testable logic
 * These functions extract the core logic from the UserCard component
 * to enable property-based testing.
 */

/**
 * Determines if the photo should be displayed or blurred
 * Property 3: User Card Photo Display
 * @param {boolean} isPhotoPublic - Whether the photo is public
 * @param {string} firstPhoto - The photo URL
 * @returns {Object} Photo display state
 */
export function getPhotoDisplayState(isPhotoPublic, firstPhoto) {
  return {
    showPhoto: isPhotoPublic && !!firstPhoto,
    showPlaceholder: !isPhotoPublic || !firstPhoto,
    isBlurred: !isPhotoPublic
  }
}

/**
 * Determines which badges should be displayed
 * Property 4: User Card Badge Display
 * @param {Object} userData - User data object
 * @param {boolean} userData.isMember - Whether user is a member
 * @param {boolean} userData.isRealName - Whether user is verified
 * @param {boolean} userData.viewedToday - Whether user was viewed today
 * @returns {Object} Badge display state
 */
export function getBadgeDisplayState(userData) {
  const { isMember = false, isRealName = false, viewedToday = false } = userData || {}
  
  return {
    showMemberBadge: isMember === true,
    showRealNameBadge: isRealName === true,
    showViewedTodayIndicator: viewedToday === true
  }
}

/**
 * Validates user card props
 * @param {Object} props - Component props
 * @returns {Object} Validation result
 */
export function validateUserCardProps(props) {
  const errors = []
  
  if (typeof props.userId !== 'number' || props.userId <= 0) {
    errors.push('userId must be a positive number')
  }
  
  if (typeof props.age !== 'number' || props.age < 0) {
    errors.push('age must be a non-negative number')
  }
  
  if (typeof props.height !== 'number' || props.height < 0) {
    errors.push('height must be a non-negative number')
  }
  
  return {
    isValid: errors.length === 0,
    errors
  }
}