package main

import (
	"after-lock/afterlock"
	"after-lock/lockfile"
	"fmt"
	"runtime/debug"
	"os"
)

const (
	initialDelay = 3
	loopDelay = 6
	keyboardDeviceNode = "/dev/input/by-id/usb-Dell_Dell_USB_Entry_Keyboard-event-kbd"
	lockfilePath = "/tmp/after-lock.lock"
	printStackTraces = false
)


func main() {
	defer handleErrors()

	lock := grabExclusiveProcessLock()
	defer lock.Unlock()

	al := afterlock.New(keyboardDeviceNode)
	al.InitialDelay = initialDelay
	al.LoopDelay = loopDelay

	al.Start()
}

func handleErrors() {
	if err := recover(); err != nil {
		fmt.Printf("Crashed with unexpected error: %v!\n", err)
		if printStackTraces {
			fmt.Printf("Stack trace:\n\n")
			debug.PrintStack()
		}
		os.Exit(1)
	}
}

func grabExclusiveProcessLock() *lockfile.Lockfile {
	lf := lockfile.New(lockfilePath)
	err := lf.Lock()
	if err != nil {
		panic(err)
	}
	return lf
}