package main

import (
	"fmt"

	"github.com/awesome-gocui/gocui"
	"go.wit.com/log"
	"go.wit.com/toolkits/tree"
	"go.wit.com/widget"
)

// set isCurrent = false everywhere
func unsetCurrent(w *guiWidget) {
	w.isCurrent = false

	if w.node.WidgetType == widget.Tab {
		// n.tk.color = &colorTab
		// n.setColor()
	}

	for _, child := range w.children {
		unsetCurrent(child)
	}
}

// when adding a new widget, this will update the display
// of the current widgets if that widget is supposed
// to be in current display
func updateCurrent(n *tree.Node) {
	var w *guiWidget
	w = n.TK.(*guiWidget)

	log.Log(NOW, "updateCurrent()", w.String())
	if n.WidgetType == widget.Tab {
		if w.IsCurrent() {
			// n.tk.color = &colorActiveT
			setColor(n, &colorActiveT)
			w.hideView()
			w.showView()
			setCurrentTab(n)
		} else {
			// n.tk.color = &colorTab
			// n.setColor()
		}
		return
	}
	if n.WidgetType == widget.Window {
		if w.IsCurrent() {
			// setCurrentWindow(n)
		}
		return
	}
	if n.WidgetType == widget.Root {
		return
	}
	updateCurrent(n.Parent)
}

// shows the widgets in a window
func setCurrentWindow(n *tree.Node) {
	var w *guiWidget
	w = n.TK.(*guiWidget)
	if w.IsCurrent() {
		return
	}
	if n.WidgetType != widget.Window {
		return
	}
	var rootTK *guiWidget
	rootTK = me.treeRoot.TK.(*guiWidget)
	unsetCurrent(rootTK)

	if w.hasTabs {
		// set isCurrent = true on the first tab
		for _, child := range w.children {
			child.isCurrent = true
			break
		}
	} else {
		w.isCurrent = true
	}
}

// shows the widgets in a tab
func setCurrentTab(n *tree.Node) {
	var w, p, rootTK *guiWidget
	w = n.TK.(*guiWidget)
	if n.WidgetType != widget.Tab {
		return
	}
	rootTK = me.treeRoot.TK.(*guiWidget)
	unsetCurrent(rootTK)
	w.isCurrent = true
	p = n.Parent.TK.(*guiWidget)
	p.isCurrent = true
	log.Log(NOW, "setCurrent()", n.String())
}

func doWidgetClick(n *tree.Node) {
	switch n.WidgetType {
	case widget.Root:
		// THIS IS THE BEGINING OF THE LAYOUT
		log.Log(NOW, "doWidgetClick()", n.String())
		redoWindows(0, 0)
	case widget.Flag:
		log.Log(NOW, "doWidgetClick() FLAG widget name =", n.String())
		log.Log(NOW, "doWidgetClick() if this is the dropdown menu, handle it here?")
	case widget.Window:
		if me.currentWindow == n {
			return
		}
		if me.currentWindow != nil {
			var w *guiWidget
			w = me.currentWindow.TK.(*guiWidget)
			unsetCurrent(w)
			setColor(me.currentWindow, &colorWindow)
			w.hideWidgets()
		}
		me.currentWindow = n
		// setCurrentWindow(n) // probably delete this
		setColor(n, &colorActiveW)

		var w *guiWidget
		w = n.TK.(*guiWidget)
		w.hideWidgets()
		w.redoTabs(me.TabW, me.TabH)
		for _, child := range w.children {
			if child.currentTab == true {
				log.Log(NOW, "FOUND CURRENT TAB", child.String())
				setCurrentTab(child.node)
				placeWidgets(child.node, me.RawW, me.RawH)
				child.showWidgets()
				return
			}
		}
		/* FIXME: redo this
		if ! n.hasTabs {
		}
		*/
	case widget.Tab:
		var w *guiWidget
		w = n.TK.(*guiWidget)
		if w.IsCurrent() {
			return // do nothing if you reclick on the already selected tab
		}
		// find the window and disable the active tab
		p := n.Parent
		if p != nil {
			var w *guiWidget
			w = p.TK.(*guiWidget)
			w.hideWidgets()
			w.redoTabs(me.TabW, me.TabH)
			unsetCurrent(w)
			for _, child := range w.children {
				if child.node.WidgetType == widget.Tab {
					setColor(child.node, &colorTab)
					child.currentTab = false
				}
			}
		}
		w.currentTab = true
		setColor(n, &colorActiveT)
		setCurrentTab(n)
		placeWidgets(n, me.RawW, me.RawH)
		w.showWidgets()
	case widget.Group:
		// n.placeWidgets(p.tk.startH, newH)
		toggleTree(n)
	case widget.Checkbox:
		var w *guiWidget
		w = n.TK.(*guiWidget)
		if widget.GetBool(w.value) {
			w.setCheckbox(false)
		} else {
			w.setCheckbox(true)
		}
		// n.doUserEvent()
		me.myTree.SendUserEvent(me.treeRoot)
	case widget.Grid:
		newR := realGocuiSize(n)

		// w,h := n.logicalSize()
		// w := newR.w1 - newR.w0
		// h := newR.h1 - newR.h0

		placeGrid(n, newR.w0, newR.h0)
		var w *guiWidget
		w = n.TK.(*guiWidget)
		w.showWidgets()
	case widget.Box:
		var w *guiWidget
		w = n.TK.(*guiWidget)
		// w.showWidgetPlacement(logNow, "drawTree()")
		if w.direction == widget.Horizontal {
			log.Log(NOW, "BOX IS HORIZONTAL", n.String())
		} else {
			log.Log(NOW, "BOX IS VERTICAL", n.String())
		}
		placeWidgets(n, me.RawW, me.RawH)
		toggleTree(n)
	case widget.Button:
		// doUserEvent(n)
		me.myTree.SendUserEvent(n)
	case widget.Dropdown:
		log.Log(NOW, "do the dropdown here")
		if me.ddview == nil {
			me.ddview = addDropdown()
			// n.TK = initWidget(n)
			var tk *guiWidget
			tk = me.ddview.TK.(*guiWidget)
			tk.gocuiSize.w0 = 20
			tk.gocuiSize.w1 = 40
			tk.gocuiSize.h0 = 10
			tk.gocuiSize.h1 = 25
			tk.v, _ = me.baseGui.SetView("ddview",
				tk.gocuiSize.w0,
				tk.gocuiSize.h0,
				tk.gocuiSize.w1,
				tk.gocuiSize.h1, 0)
			if tk.v == nil {
				return
			}
			tk.v.Wrap = true
			tk.v.Frame = true
			tk.v.Clear()
			fmt.Fprint(tk.v, "example.com\nwit.com")
			SetVisible(me.ddview, true)
			return
		}
		log.Log(NOW, "doWidgetClick() visible =", Visible(me.ddview))
		var tk *guiWidget
		tk = me.ddview.TK.(*guiWidget)
		if Visible(me.ddview) {
			SetVisible(me.ddview, false)
			me.baseGui.DeleteView("ddview")
			tk.v = nil
		} else {
			var dnsList string
			for i, s := range tk.vals {
				log.Log(NOW, "AddText()", n.String(), i, s)
				dnsList += s + "\n"
			}
			me.ddNode = n
			log.Log(NOW, "new dns list should be set to:", dnsList)
			tk.labelN = dnsList
			tk.SetText(dnsList)
			SetVisible(me.ddview, true)
		}
		for i, s := range tk.vals {
			log.Log(NOW, "AddText()", tk.String(), i, s)
		}
	default:
	}
}

var toggle bool = true

func toggleTree(n *tree.Node) {
	var w *guiWidget
	w = n.TK.(*guiWidget)
	if toggle {
		drawTree(n, toggle)
		toggle = false
	} else {
		w.hideWidgets()
		toggle = true
	}
}

// display the widgets in the binary tree
func drawTree(n *tree.Node, draw bool) {
	var w *guiWidget
	w = n.TK.(*guiWidget)
	if w == nil {
		return
	}
	showWidgetPlacement(n, true, "drawTree()")
	if draw {
		// w.textResize()
		w.showView()
	} else {
		w.deleteView()
	}

	for _, child := range w.children {
		drawTree(child.node, draw)
	}
}

func click(g *gocui.Gui, v *gocui.View) error {
	// var l string
	// var err error

	log.Log(INFO, "click() START", v.Name())
	// n := me.rootNode.findWidgetName(v.Name())
	n := findUnderMouse()
	var w *guiWidget
	w = n.TK.(*guiWidget)
	if n != nil {
		log.Log(NOW, "click() Found widget =", n.WidgetId, n.String(), ",", w.labelN)
		if n.String() == "DropBox" {
			log.Log(NOW, "click() this is the dropdown menu. set a flag here what did I click? where is the mouse?")
			log.Log(NOW, "click() set a global dropdown clicked flag=true here")
			me.ddClicked = true
		}
		doWidgetClick(n)
	} else {
		log.Log(NOW, "click() could not find node name =", v.Name())
	}

	if _, err := g.SetCurrentView(v.Name()); err != nil {
		log.Log(NOW, "click() END err =", err)
		return err
	}

	log.Log(NOW, "click() END")
	return nil
}

func findUnderMouse() *tree.Node {
	var found *tree.Node
	var widgets []*tree.Node
	var f func(n *tree.Node)
	w, h := me.baseGui.MousePosition()

	// find buttons that are below where the mouse button click
	f = func(n *tree.Node) {
		var widget *guiWidget
		widget = n.TK.(*guiWidget)
		// ignore widgets that are not visible
		if Visible(n) {
			if (widget.gocuiSize.w0 <= w) && (w <= widget.gocuiSize.w1) &&
				(widget.gocuiSize.h0 <= h) && (h <= widget.gocuiSize.h1) {
				widgets = append(widgets, n)
				found = n
			}
		}
		if n == me.ddview {
			log.Log(NOW, "findUnderMouse() found ddview")
			if Visible(n) {
				log.Log(NOW, "findUnderMouse() and ddview is visable. hide it here. TODO: find highlighted row")
				found = n
				// find the actual value here and set the dropdown widget
				me.baseGui.DeleteView("ddview")
			} else {
				log.Log(NOW, "findUnderMouse() I was lying, actually it's not found")
			}
		}

		for _, child := range widget.children {
			f(child.node)
		}
	}
	f(me.treeRoot)
	// widgets has everything that matches
	// TODO: pop up menu with a list of them
	for _, n := range widgets {
		//log(logNow, "ctrlDown() FOUND widget", widget.id, widget.name)
		showWidgetPlacement(n, true, "findUnderMouse() FOUND")
	}
	return found
}

// find the widget under the mouse click
func ctrlDown(g *gocui.Gui, v *gocui.View) error {
	var found *tree.Node
	// var widgets []*node
	// var f func (n *node)
	found = findUnderMouse()
	if me.ctrlDown == nil {
		setupCtrlDownWidget()

		var tk *guiWidget
		tk = me.ctrlDown.TK.(*guiWidget)
		tk.labelN = found.String()
		tk.cuiName = "ctrlDown"
		// me.ctrlDown.parent = me.rootNode
	}
	var tk *guiWidget
	tk = me.ctrlDown.TK.(*guiWidget)
	if found == nil {
		found = me.treeRoot
	}
	tk.labelN = found.String()
	newR := realGocuiSize(found)
	tk.gocuiSize.w0 = newR.w0
	tk.gocuiSize.h0 = newR.h0
	tk.gocuiSize.w1 = newR.w1
	tk.gocuiSize.h1 = newR.h1
	if tk.Visible() {
		// me.ctrlDown.hideView()
	} else {
		// me.ctrlDown.showView()
	}
	// me.ctrlDown.showWidgetPlacement(true, "ctrlDown:")
	return nil
}