package main

import "fmt"

func main() {
  list := List{}
  list.insert(2)
  list.insert(4)
  list.insert(6)
  list.printListInfo()
}

// Node Type
type Node struct {
  data int
  next *Node
}

// LinkedList Type
type List struct {
  head *Node
}

func (self *List) printListInfo() {
  fmt.Println("\nList Info:")
  fmt.Printf("items: %v\n", self.items())
  fmt.Printf("count: %v\n", self.count())
  fmt.Println("\n")
}

func (l *List) insert(n int) {
  if l.head == nil {
    l.head = &Node{ n, l.head }
  } else {
    temp := l.head
    last := l.head

    for temp != nil {
      last = temp
      temp = temp.next
    }
    last.next = &Node { n, nil }
  }

  l.printNodes()
}

func (l *List) printNodes() {
  temp := l.head
  for temp != nil {
    fmt.Printf("%v ", temp.data)
    temp = temp.next
  }
  fmt.Println()
}

func (l *List) count() int {
  temp := l.head
  count := 0
  for temp != nil {
    count += 1
    temp = temp.next
  }
  return count
}

func (l *List) items() []int {
  temp := l.head

  var nodes []int

  for temp != nil {
    nodes = append(nodes, temp.data)
    temp = temp.next
  }
  return nodes
}