package main

import (
	"fmt"
	"io"
	"log"
	"os"
	"slices"
	"syscall"

	// _ "embed"
	"fyne.io/systray"
	hook "github.com/robotn/gohook"
)

var (
	us32                = syscall.MustLoadDLL("user32.dll")
	SetForegroundWindow = us32.MustFindProc("SetForegroundWindow")
	GetForegroundWindow = us32.MustFindProc("GetForegroundWindow")
)

// //go:embed duck2.jpg
// var icon []byte
var Error *log.Logger
var Warning *log.Logger

func init() {
	log.SetFlags(log.Lmicroseconds | log.Lshortfile)
	logFile, err := os.Create("main.log")
	if err != nil {
		log.Printf("Error creating log file: %v", err)
		os.Exit(1)
	}
	logger := io.MultiWriter(os.Stdout, logFile)
	log.SetOutput(logger)

	Error = log.New(io.MultiWriter(logFile, os.Stderr, os.Stdout),
		fmt.Sprintf("%sERROR:%s ", "\033[0;101m", "\033[0m"),
		log.Lmicroseconds|log.Lshortfile)
	Warning = log.New(io.MultiWriter(logFile, os.Stdout),
		fmt.Sprintf("%sWarning:%s ", "\033[0;93m", "\033[0m"),
		log.Lmicroseconds|log.Lshortfile)
}

var processes = []uintptr{}

func main() {
	go systray.Run(onReady, nil)

	hook.Register(hook.KeyDown, []string{"alt", "-"}, func(e hook.Event) {
		hwnd, _, _ := GetForegroundWindow.Call()
		if slices.Contains(processes, hwnd) {
			processes = slices.DeleteFunc(processes, func(i uintptr) bool {
				return i == hwnd
			})
		} else {
			processes = append(processes, hwnd)
		}
		log.Printf("%#v", processes)
	})
	hook.Register(hook.KeyDown, []string{"alt", "1"}, func(e hook.Event) {
		TabTo(0)
	})

	s := hook.Start()
	<-hook.Process(s)
}
func TabTo(idx int) {
	log.Printf("TabTo: %d", idx)
	log.Printf("%+v", processes)
	if idx > len(processes) {
		Warning.Printf("idx %d is greater than length of processes %d", idx, len(processes))
		return
	}
	hwnd := processes[idx]
	if hwnd == 0 {
		Warning.Printf("hwnd for idx %d is 0", idx)
		return
	}
	SetForegroundWindow.Call(hwnd)
}

func onReady() {
	// Icons no workey... idk why...
	// systray error: unable to set icon: The operation completed successfully.
	//systray.SetIcon(icon)
	systray.SetTitle("Awesome App")
	systray.SetTooltip("Pretty awesome超级棒")
	mQuit := systray.AddMenuItem("Quit", "Quit the whole app")
	go func() {
		<-mQuit.ClickedCh
		fmt.Println("Requesting quit")
		systray.Quit()
		os.Exit(0)
		// TODO: Quit properly, not this exit bullshit
		fmt.Println("Finished quitting")
	}()

	// Sets the icon of a menu item. Only available on Mac and Windows.
	//mQuit.SetIcon(icon)
}