// Copyright 2017-2025 WIT.COM Inc. All rights reserved.
// Use of this source code is governed by the GPL 3.0

// this file implements a libnotify-like menu
// also there is SIGWINCH resizing
package main

import (
	"fmt"
	"time"

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

// create a new widget in the binary tree
func makeNewInternalWidget(wId int) *guiWidget {
	if me.treeRoot == nil {
		log.Info("GOGUI Init ERROR. treeRoot == nil")
		return nil
	}
	n := new(tree.Node)
	n.WidgetType = widget.Flag
	n.WidgetId = wId
	n.ParentId = 0

	// store the internal toolkit information
	tk := new(guiWidget)
	tk.frame = true

	tk.node = n
	tk.node.Parent = me.treeRoot

	// set the name used by gocui to the id
	tk.cuiName = fmt.Sprintf("%d DR", wId)

	tk.setColorInput()

	// add this new widget on the binary tree
	tk.parent = me.treeRoot.TK.(*guiWidget)
	if tk.parent == nil {
		panic("makeNewFlagWidget() didn't get treeRoot guiWidget")
	} else {
		tk.parent.children = append(tk.parent.children, tk)
	}

	n.TK = tk
	return tk
}

func makeNotifyClock() {
	if me.treeRoot == nil {
		log.Info("gogui makeClock() error. treeRoot == nil")
		return
	}
	me.notify.clock.tk = makeNewInternalWidget(me.notify.clock.wId)
	// me.notify.clock.tk.dumpWidget("init() clock")
	me.notify.clock.tk.MoveToOffset(0, 0)
	me.notify.clock.tk.labelN = time.Now().Format("15:04:05")
	me.notify.clock.tk.frame = false
	me.notify.clock.tk.setColorLabel()
	me.notify.clock.tk.Show()
	me.notify.clock.active = true
	// me.notify.clock.tk.dumpWidget("notifyClock()")

}

func makeNotifyIcon() {
	if me.treeRoot == nil {
		log.Info("gogui makeClock() error. treeRoot == nil")
		return
	}
	me.notify.icon.tk = makeNewInternalWidget(me.notify.icon.wId)
	// me.notify.icon.tk.dumpWidget("init() menu")
	w, _ := me.baseGui.Size()
	me.notify.icon.tk.MoveToOffset(w-5, me.notify.icon.offsetH)
	me.notify.icon.tk.labelN = "[ ]"
	me.notify.icon.tk.frame = false
	me.notify.icon.tk.setColorNotifyIcon()
	me.notify.icon.tk.Show()
	me.notify.icon.active = true
	// me.notify.icon.tk.dumpWidget("notifyIcon()")

}

func libNotifyUpdate() {
	if me.baseGui == nil {
		log.Info("libNotifyUpdate error baseGui == nil")
		return
	}

	// refresh GOCUI
	me.baseGui.Update(testRefresh)
	// me.baseGui.UpdateAsync(testRefresh) // Async option. probably don't need this?

	if me.notify.clock.tk == nil {
		log.Info("libNotifyUpdate error clock.tk == nil")
		return
	}

	// check for SIGWINCH. If so, move the libnotify clock
	w, h := me.baseGui.Size()
	if me.winchW != w || me.winchH != h {
		if me.winchW == 0 && me.winchH == 0 {
			// this isn't really SIGWINCH. This is the app starting
		} else {
			log.Printf("gocui: long live SIGWINCH! (w,h) is now (%d,%d)\n", w, h)
		}
		me.winchW = w
		me.winchH = h
		me.notify.clock.tk.MoveToOffset(w-me.notify.clock.offsetW, me.notify.clock.offsetH)
		me.notify.clock.tk.Hide()
		me.notify.clock.tk.Show()

		sigWinchBG()
		sigWinchIcon()
	}

	// update the time
	me.notify.clock.tk.v.Clear()
	me.notify.clock.tk.labelN = time.Now().Format("15:04:05")
	me.notify.clock.tk.v.WriteString(me.notify.clock.tk.labelN)
	hardDrawAtgocuiSize(me.notify.clock.tk)
	// hardDrawUnderMouse(me.notify.clock.tk, "clock")
	// log.Info("libNotifyUpdate updated clock", me.notify.clock.tk.labelN)

	if me.notify.icon.tk == nil {
		log.Info("libNotifyUpdate error menu.tk == nil")
		return
	}
	if me.notify.icon.tk.v == nil {
		log.Info("libNotifyUpdate error menu.tk.v == nil")
		return
	}

	// update the menu
	hardDrawAtgocuiSize(me.notify.icon.tk)
	me.notify.icon.tk.setColorNotifyIcon()
	me.baseGui.SetViewOnTop(me.notify.icon.tk.v.Name())
	me.baseGui.SetViewOnTop(me.notify.clock.tk.v.Name())
}

func setNotifyIconText(s string) {
	me.notify.icon.tk.v.Clear()
	me.notify.icon.tk.labelN = s
	me.notify.icon.tk.v.WriteString(me.notify.icon.tk.labelN)
	hardDrawAtgocuiSize(me.notify.icon.tk)
	me.notify.icon.tk.setColorNotifyIcon()
	me.baseGui.SetViewOnTop(me.notify.icon.tk.v.Name())
	log.Info("setNotifyIconText() updated menu to:", me.notify.icon.tk.labelN)
}

// in the very end of redrawing things, this will place the help and stdout on the top or botton
// depending on the state the user has chosen
func setThingsOnTop() {
	if me.showHelp { // terrible variable name. FIXME
		// log.Info("help does not exist")
	} else {
		me.baseGui.SetViewOnTop("help")
	}

	if me.notify.clock.tk != nil {
		me.baseGui.SetViewOnTop(me.notify.clock.tk.v.Name())
	}

	if me.notify.icon.tk != nil {
		if me.notify.icon.tk.v != nil {
			me.baseGui.SetViewOnTop(me.notify.icon.tk.v.Name())
		}
	}

	if me.stdout.tk == nil {
		makeOutputWidget(me.baseGui, "from setThingsOnTop()")
	}
	if me.stdout.tk == nil {
		return
	}
	if me.stdout.tk.v == nil {
		return
	}
	if me.dark {
		me.stdout.tk.v.FgColor = gocui.ColorWhite
		me.stdout.tk.v.BgColor = gocui.ColorBlack
	} else {
		me.stdout.tk.v.FgColor = gocui.ColorBlack
		me.stdout.tk.v.BgColor = gocui.AttrNone
	}

	if me.stdout.outputOnTop {
		me.baseGui.SetViewOnTop("msg")
	} else {
		me.baseGui.SetViewOnBottom("msg")
	}
	if me.stdout.startOnscreen {
		// log.Info("THIS TRIGGERS STDOUT") // todo: make a proper init() & move this there
		me.stdout.tk.relocateStdout(me.stdout.lastW, me.stdout.lastH)
		me.stdout.startOnscreen = false
	}
	setBottomBG()
}

// useful for debuggging
func hardDrawUnderMouse(tk *guiWidget, name string) {
	if tk.v != nil {
		tk.Hide()
	}
	w, h := me.baseGui.MousePosition()
	a := w
	b := h
	c := w + 8
	d := h + 4
	var err error
	tk.v, err = me.baseGui.SetView(tk.cuiName, a, b, c, d, 0)
	if err == nil {
		log.Info("hardDrawUnderMouse() err ok widget", tk.cuiName)
		tk.dumpWidget("hard draw err")
	}
	tk.v.Frame = false
	tk.v.Clear()
	tk.v.WriteString(tk.labelN + "\n" + name)
}

func hardDrawAtgocuiSize(tk *guiWidget) {
	if tk.v != nil {
		tk.Hide()
	}
	a := tk.gocuiSize.w0
	b := tk.gocuiSize.h0
	c := tk.gocuiSize.w1
	d := tk.gocuiSize.h1
	var err error
	tk.v, err = me.baseGui.SetView(tk.cuiName, a, b, c, d, 0)
	if err == nil {
		log.Info("hardDrawAtgocuiSize() err ok widget", tk.cuiName)
		tk.dumpWidget("hard draw err")
	}
	tk.v.Frame = false
	tk.v.Clear()
	tk.v.WriteString(tk.labelN)
	log.Verbose("hardDrawAtgocuiSize() err ok widget", tk.cuiName, a, b, c, d, tk.v.Name())
}

func sigWinchIcon() {
	w, _ := me.baseGui.Size()
	me.notify.icon.tk.MoveToOffset(w-me.notify.icon.offsetW, me.notify.icon.offsetH)
	me.notify.icon.tk.Hide()
	me.notify.icon.tk.Show()
}

func sigWinchBG() {
	tk := me.BG.tk
	w, h := me.baseGui.Size()
	a := -1
	b := -1
	c := w + 1
	d := h + 1
	var err error
	tk.v, err = me.baseGui.SetView(tk.cuiName, a, b, c, d, 0)
	if err == nil {
		if tk.v == nil {
			tk.dumpWidget("drawView() err")
			log.Log(ERROR, "drawView() internal plugin error err = nil")
		}
		return
	}
	log.Log(INFO, "background resized to", a, b, c, d)
}

// find the "BG" widget and set it to the background on the very very bottom
func setBottomBG() {
	if me.BG.tk == nil {
		log.Info("background tk widget not initialized")
		return
	}
	tk := me.BG.tk
	// log.Info("found BG. setting to bottom", tk.cuiName)
	if tk.v == nil {
		sigWinchBG()
		return
	}
	if me.dark {
		tk.v.BgColor = gocui.ColorBlack
	} else {
		tk.v.BgColor = gocui.ColorWhite
	}
	tk.v.Clear()
	me.baseGui.SetViewOnBottom(tk.cuiName)
	w, h := me.baseGui.Size()
	me.baseGui.SetView(tk.cuiName, -1, -1, w+1, h+1, 0)
}