package plist

import (
	"474420502.top/eson/structure"
)

type NodeList struct {
	head, tail *Node
}

// Node 节点结构
type Node struct {
	prev, next *Node
	structure.NValue
}

// PriorityList 跳表
type PriorityList struct {
	size    int
	compare func(v1, v2 interface{}) int
	level   *LevelNode
}

type LevelSize struct {
	size int
}

// LevelNode 层级列表
type LevelNode struct {
	node  *Node
	prev  *LevelNode
	next  *LevelNode
	sub   interface{}
	lsize *LevelSize
	level int
}

// New a node
func New() *PriorityList {
	p := new(PriorityList)
	p.level = new(LevelNode)
	p.level.lsize = new(LevelSize)
	p.level.lsize.size = 1

	lnode := new(LevelNode)
	lnode.lsize = new(LevelSize)
	p.level.sub = lnode

	node := new(Node)
	lnode.sub = node

	return p
}

// String 展示需要的
func (pl *PriorityList) String() string {

	content := ""

	return content
}

// InsertValues 插入值
func (pl *PriorityList) InsertValues(values ...interface{}) {

	for _, value := range values {
		node := new(Node)
		node.IValue = value

		ll := pl.level
		// 寻找 适合的level
		for ll.level != 0 {

			if pl.compare(node, ll.node) > 0 {
				temp := ll.prev

			}

		}

		// 找到数据后
		if ll.level == 0 {

			if ll.sub == nil {
				ll.sub = node
				continue
			}

			cur := ll.sub.(*Node)

			isTail := false

			for i := 0; i < ll.lsize.size; i++ {
				if pl.compare(node, cur) > 0 {

					temp := cur.prev
					cur.prev = node
					if temp != nil {
						node.prev = temp
						temp.next = node
					}
					ll.lsize.size++
					pl.size++

					isTail = true
				}
				cur = cur.next
			}

			if isTail {
				temp := cur.next
				cur.next = node
				if temp != nil {
					node.next = temp
					temp.prev = node
				}
				ll.lsize.size++
				pl.size++
			}

		}
	}
}

// Get 获取索引长度
// func (pl *PriorityList) Get(idx int) INode {

// 	if idx >= pl.size {
// 		return nil
// 	}
// 	cur := pl.head
// 	for i := 0; i < idx; i++ {
// 		cur = cur.GetNext()
// 	}
// 	return cur
// }

// Size 长度
func (pl *PriorityList) Size() int {
	return pl.size
}

// Clear 清空链表, 如果外部有引用其中一个节点 要把节点Prev Next值为nil, 三色标记
func (pl *PriorityList) Clear() {
	pl.level = nil
	pl.size = 0
}