import lombok.Data;

@Data
public class ComplexListNode {
    private int value;
    private ComplexListNode next;
    private ComplexListNode siblingNode;

    public ComplexListNode() {
    }
    
    public ComplexListNode(int value) {
        this.value = value;
    }
    
    public ComplexListNode(int value, ComplexListNode next) {
        this.value = value;
        this.next = next;
    }
    
    public static ComplexListNode myClone(ComplexListNode head) {
        if(head==null)
            return null;
        
        cloneDouble(head);
        cloneSibling(head);
        return seperateDouble(head);
    }

    private static void cloneDouble(ComplexListNode head) {
        ComplexListNode node = head;
        while(node!=null) {
            ComplexListNode newNode = new ComplexListNode();
            newNode.setValue(node.getValue());
            newNode.setNext(node.next);
            node.setNext(newNode);
            node = newNode.getNext();
        }
    }

    private static void cloneSibling(ComplexListNode head) {
        ComplexListNode node = head;
        while(node!=null) {
            ComplexListNode newNode = node.getNext();
            ComplexListNode siblingNode = node.getSiblingNode();
            if(siblingNode==null) {
                newNode.setSiblingNode(null);
            } else {
                newNode.setSiblingNode(siblingNode.getNext());
            }
            node = newNode.getNext();
        }
    }

    private static ComplexListNode seperateDouble(ComplexListNode head) {
        ComplexListNode newHead = head.getNext();
        ComplexListNode node = head;
        
        while(node!=null) {
            ComplexListNode nextNode = node.getNext();
            ComplexListNode next2Node = nextNode.getNext();
            ComplexListNode next3Node = next2Node==null?null:next2Node.getNext();
            
            node.setNext(next2Node);
            nextNode.setNext(next3Node);
            
            node=next2Node;
        }
        
        return newHead;
    }
    
    public static void traversal(ComplexListNode head){
        while (head!=null) {
            System.out.println("this node value is: " + head.value);
            if(head.getSiblingNode()==null) {
                System.out.println("this node's sibling value is: null" );
            } else {
                System.out.println("this node's sibling value is: " + head.getSiblingNode().getValue());
            }
            
            head = head.next;
        }
    }
}