package binarysearchtree

// SearchTreeData is a Binary Search Tree node
type SearchTreeData struct {
	data  int
	left  *SearchTreeData
	right *SearchTreeData
}

// Bst creates a node from an int
func Bst(n int) *SearchTreeData {
	return &SearchTreeData{data: n}
}

// Insert finds the correct location for a new node and inserts it there.
func (s *SearchTreeData) Insert(n int) *SearchTreeData {
	if s == nil {
		return Bst(n)
	}
	if s.data < n {
		s.right = s.right.Insert(n)
	} else {
		s.left = s.left.Insert(n)
	}
	return s
}

// MapString maps a function to every node in the search tree and returns
// the []string result of it.
func (s *SearchTreeData) MapString(f func(int) string) []string {
	var ret []string
	if s != nil {
		ret = append(ret, s.left.MapString(f)...)
		ret = append(ret, f(s.data))
		ret = append(ret, s.right.MapString(f)...)
	}
	return ret
}

// MapInt maps a function to every node in the search tree and returns
// the []int result of it.
func (s *SearchTreeData) MapInt(f func(int) int) []int {
	var ret []int
	if s != nil {
		ret = append(ret, s.left.MapInt(f)...)
		ret = append(ret, f(s.data))
		ret = append(ret, s.right.MapInt(f)...)
	}
	return ret
}