package gui

// Common actions for widgets like 'Enable' or 'Hide'

import (
	"go.wit.com/log"
	"go.wit.com/widget"
)

// functions for handling text related GUI elements

func (n *Node) Show() *Node {
	if !n.Ready() {
		return n
	}
	if !n.Hidden() {
		return n
	}

	n.visable = true
	n.hidden = false
	n.changed = true

	if n.WidgetType == widget.Window {
		log.Log(CHANGE, "Show() on a hidden window", n.progname)
		log.Log(NOW, "Show() TO FIX: this is doing TestDraw()")
		n.TestDraw()
		return n
	}

	// inform the toolkits
	sendAction(n, widget.Show)
	return n
}

func (n *Node) Hide() *Node {
	if !n.Ready() {
		return n
	}

	if n.WidgetType == widget.Window {
		log.Log(CHANGE, "Hide() on a window", n.progname)
		log.Log(CHANGE, "Hide() this needs to do destroy() ?")
		n.destroy()
		n.hidden = true
		n.visable = false
		n.changed = true
		return nil
	}

	n.hidden = true
	n.changed = true

	// inform the toolkits
	sendAction(n, widget.Hide)
	return n
}

// enables a widget so the user can see it and work/click/etc on it
// by default, widgets are enabled when they are created
func (n *Node) Enable() *Node {
	if !n.Ready() {
		return n
	}
	// if n.enabled { return n }

	n.enabled = true
	n.changed = true

	// inform the toolkits
	sendAction(n, widget.Enable)
	return n
}

// disables a widget so the user can see it, but can not
// interact or change it.
func (n *Node) Disable() *Node {
	if !n.Ready() {
		return n
	}
	// if ! n.enabled { return n }

	n.enabled = false
	n.changed = true

	// inform the toolkits
	sendAction(n, widget.Disable)
	return n
}

func (n *Node) Bool() bool {
	if !n.Ready() {
		return false
	}

	switch n.WidgetType {
	case widget.Checkbox:
		return n.checked
	default:
	}

	return widget.GetBool(n.value)
}

func (n *Node) Int() int {
	if !n.Ready() {
		return -1
	}

	return widget.GetInt(n.value)
}

func (n *Node) SetBool(b bool) {
	switch n.WidgetType {
	case widget.Checkbox:
		n.checked = b
		n.value = b
	default:
		log.Warn("WidgetType not bool", n.WidgetType, n.id)
	}
}

func (n *Node) SetInt(i int) {
	switch n.WidgetType {
	default:
		n.value = i
		// log.Warn("WidgetType not bool", n.WidgetType, n.id)
	}
}

func (n *Node) String() string {
	if !n.Ready() {
		return ""
	}
	switch n.WidgetType {
	case widget.Window:
		return n.label
	case widget.Button:
		return n.label
	case widget.Group:
		return n.label
	case widget.Label:
		return n.label
	default:
	}

	return widget.GetString(n.value)
}

func (n *Node) Strings() []string {
	if !n.Ready() {
		return nil
	}
	var tmp []string

	for s, _ := range n.strings {
		tmp = append(tmp, s)
	}

	return tmp
}

func (n *Node) destroy() {
	if !n.Ready() {
		return
	}

	n.enabled = false
	n.changed = true

	log.Log(CHANGE, "destroy()", n.WidgetType, n.id, n.GetProgName())

	// inform the toolkits
	sendAction(n, widget.Delete)
	return
}

// appends text to the existing text
// TODO: this is an experiement
func (n *Node) AppendText(str string) {
	if !n.Ready() {
		return
	}
	tmp := widget.GetString(n.value) + str
	n.value = tmp
	n.changed = true

	// inform the toolkits
	sendAction(n, widget.SetText)
}

// should get the reference name used for programming and debugging
/*
TODO: ensure these are unique and make a way to look them up
myButton = myGroup.NewButton("hit ball", nil).SetName("HIT")
myButton.GetName() should return "HIT"
n = Find("HIT") should return myButton
*/
func (n *Node) SetProgName(s string) *Node {
	if !n.Ready() {
		return n
	}

	if n.progname == s {
		// don't do anything since nothing changed
		return n
	}

	n.changed = true
	n.progname = s
	return n
}

func (n *Node) GetProgName() string {
	if !n.Ready() {
		return ""
	}
	return n.progname
}

func (n *Node) Margin() *Node {
	if !n.Ready() {
		return n
	}
	if n.margin {
		return n
	}

	n.margin = true
	n.changed = true

	log.Log(INFO, "Margin()", n.WidgetType, n.progname)
	// inform the toolkits
	sendAction(n, widget.Margin)
	return n
}

func (n *Node) Unmargin() *Node {
	if !n.Ready() {
		return n
	}
	if !n.margin {
		return n
	}

	n.margin = false
	n.changed = true

	// inform the toolkits
	sendAction(n, widget.Unmargin)
	return n
}

func (n *Node) Pad() *Node {
	if !n.Ready() {
		return n
	}
	if n.pad == true {
		return n
	} // nothing changed

	n.pad = true
	n.changed = true

	log.Log(INFO, "Pad()", n.WidgetType, n.progname)
	// inform the toolkits
	sendAction(n, widget.Pad)
	return n
}

func (n *Node) Unpad() *Node {
	if !n.Ready() {
		return n
	}
	if n.pad == false {
		return n
	} // nothing changed

	n.pad = false
	n.changed = true

	// inform the toolkits
	sendAction(n, widget.Unpad)
	return n
}

func (n *Node) Expand() *Node {
	if !n.Ready() {
		return n
	}
	if n.expand == true {
		return n
	} // nothing changed

	n.expand = true
	n.changed = true

	// inform the toolkits
	sendAction(n, widget.SetExpand)
	return n
}

func (n *Node) SetExpand(b bool) *Node {
	if !n.Ready() {
		return n
	}
	if n.expand == b {
		return n
	} // nothing changed

	n.expand = b
	n.changed = true

	// inform the toolkits
	sendAction(n, widget.SetExpand)
	return n
}

// is the widget currently viewable?
func (n *Node) Hidden() bool {
	if !n.Ready() {
		return false
	}
	return n.hidden
}

func (n *Node) Ready() bool {
	if n == nil {
		log.Log(NOW, "Ready() got node == nil. TODO: find code trace to here")
		panic("ready got nil")
		// TODO: figure out if you can identify the code trace
		// to help find the root cause
		return false
	}
	return true
}

// returns the root of the binary tree
// change the names to 'Tree' as I think the name is better
func TreeRoot() *Node {
	return me.rootNode
}

//
//
// DEPRECATE / REDO / SORT OUT THIS STUFF
//
//

/*
// string handling examples that might be helpful for normalizeInt()
isAlpha := regexp.MustCompile(`^[A-Za-z]+$`).MatchString

for _, username := range []string{"userone", "user2", "user-three"} {
    if !isAlpha(username) {
        log.Log(GUI, "%q is not valid\n", username)
    }
}

const alpha = "abcdefghijklmnopqrstuvwxyz"

func alphaOnly(s string) bool {
   for _, char := range s {
      if !strings.Contains(alpha, strings.ToLower(string(char))) {
         return false
      }
   }
   return true
}

func normalizeInt(s string) string {
	// reg, err := regexp.Compile("[^a-zA-Z0-9]+")
	reg, err := regexp.Compile("[^0-9]+")
	if err != nil {
		log.Log(GUI, "normalizeInt() regexp.Compile() ERROR =", err)
		return s
	}
	clean := reg.ReplaceAllString(s, "")
	log.Log(GUI, "normalizeInt() s =", clean)
	return clean
}
*/