package tree

import (
	"errors"
	"os"
	"runtime/debug"
	"sync"

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

var muAction sync.Mutex

// TODO: add checks for nil function pointers
func (me *TreeInfo) newAction(a widget.Action) {
	n := treeRoot.FindWidgetId(a.WidgetId)
	switch a.ActionType {
	case widget.Add:
		if n == nil {
			n := me.AddNode(&a)
			me.Add(n)
			return
		}
		log.Log(TREEWARN, "attempting to re-add widget", a.WidgetId, a.WidgetType, a.ActionType)
		return
	}
	if n == nil {
		log.Log(TREEWARN, "tree.FindWidgetId() n == nil", a.WidgetId, a.WidgetType, a.ActionType)
		log.Log(TREEWARN, "tree.FindWidgetId() n == nil", a.State.CurrentS)
		log.Log(TREEWARN, "tree.FindWidgetId() n == nil. This should not happen. Bug in gui or tree package?")
		log.Log(TREEWARN, "tree.FindWidgetId() n == nil. A bug in your application?")
		return
	}
	switch a.ActionType {
	case widget.SetText:
		log.Log(TREE, "tree.SetText() a.State.CurrentS =", a.State.CurrentS)
		log.Log(TREE, "tree.SetText() a.State.DefaultS =", a.State.DefaultS)
		log.Log(TREE, "tree.SetText() a.State.NewString =", a.State.NewString)
		switch n.WidgetType {
		case widget.Dropdown:
			me.SetText(n, a.State.NewString)
		case widget.Combobox:
			me.SetText(n, a.State.NewString)
		case widget.Textbox:
			me.SetText(n, a.State.NewString)
		case widget.Window:
			me.SetTitle(n, a.State.Label)
		default:
			// buttons, checkboxes, groups, etc
			me.SetLabel(n, a.State.Label)
		}
	case widget.AddText:
		switch n.WidgetType {
		case widget.Dropdown:
			n.ddStrings = append(n.ddStrings, a.State.NewString)
			me.AddText(n, a.State.NewString)
		case widget.Combobox:
			n.ddStrings = append(n.ddStrings, a.State.NewString)
			me.AddText(n, a.State.NewString)
		default:
			log.Log(TREEWARN, "AddText() not supported on widget", n.WidgetType, n.String())
		}
	case widget.Checked:
		switch n.WidgetType {
		case widget.Checkbox:
			if me.SetChecked == nil {
				log.Log(TREEWARN, "SetChecked() == nil in toolkit", me.PluginName)
			} else {
				me.SetChecked(n, a.State.Checked)
			}
		default:
			log.Log(TREEWARN, "SetChecked() not supported on widget", n.WidgetType, n.String())
		}
	default:
		me.NodeAction(n, a.ActionType)
	}
}

func (me *TreeInfo) catchActionChannel() {
	defer func() {
		if r := recover(); r != nil {
			log.Log(TREEWARN, "YAHOOOO Recovered in tree.catchActionChannel()", r)
			log.Log(TREEWARN, "YAHOOOO Recovered in tree.catchActionChannel() Plugin:", me.PluginName)
			me.SendToolkitPanic()
			debug.PrintStack()
			me.ToolkitClose()
			if me.PluginName == "nocui" {
				os.Exit(-1)
			}
		}
	}()
	log.Log(TREE, "catchActionChannel() START")
	for {
		log.Log(TREE, "catchActionChannel() for loop")
		select {
		case a := <-me.pluginChan:
			log.Verbose("catchActionChannel() on ", a.WidgetId, a.WidgetType, a.ProgName)
			muAction.Lock()
			if me.newAction == nil {
				log.Error(errors.New("toolkit newAction == nil"), a.WidgetId, a.ActionType, a.WidgetType)
			} else {
				// send this to the toolkit
				me.newAction(a)
				// me.ActionFromChannel(a)
			}
			muAction.Unlock()
		}
	}
}

func New() *TreeInfo {
	me := new(TreeInfo)
	me.pluginChan = make(chan widget.Action, 1)

	log.Log(TREE, "Init() start channel reciever")
	go me.catchActionChannel()
	log.Log(TREE, "Init() END")
	return me
}