package expr

import (
	"github.com/z7zmey/php-parser/meta"
	"github.com/z7zmey/php-parser/node"
	"github.com/z7zmey/php-parser/position"
	"github.com/z7zmey/php-parser/walker"
)

// Ternary node
type Ternary struct {
	Meta      meta.Collection
	Position  *position.Position
	Condition node.Node
	IfTrue    node.Node
	IfFalse   node.Node
}

// NewTernary node constructor
func NewTernary(Condition node.Node, IfTrue node.Node, IfFalse node.Node) *Ternary {
	return &Ternary{
		Condition: Condition,
		IfTrue:    IfTrue,
		IfFalse:   IfFalse,
	}
}

// SetPosition sets node position
func (n *Ternary) SetPosition(p *position.Position) {
	n.Position = p
}

// GetPosition returns node positions
func (n *Ternary) GetPosition() *position.Position {
	return n.Position
}

func (n *Ternary) GetMeta() *meta.Collection {
	return &n.Meta
}

// Attributes returns node attributes as map
func (n *Ternary) Attributes() map[string]interface{} {
	return nil
}

// Walk traverses nodes
// Walk is invoked recursively until v.EnterNode returns true
func (n *Ternary) Walk(v walker.Visitor) {
	if v.EnterNode(n) == false {
		return
	}

	if n.Condition != nil {
		v.EnterChildNode("Condition", n)
		n.Condition.Walk(v)
		v.LeaveChildNode("Condition", n)
	}

	if n.IfTrue != nil {
		v.EnterChildNode("IfTrue", n)
		n.IfTrue.Walk(v)
		v.LeaveChildNode("IfTrue", n)
	}

	if n.IfFalse != nil {
		v.EnterChildNode("IfFalse", n)
		n.IfFalse.Walk(v)
		v.LeaveChildNode("IfFalse", n)
	}

	v.LeaveNode(n)
}