package main
import (
	//"flag"
	"log"
	"fmt"
	"strings"
	"time"
	"github.com/stephen-fox/user32util"
)
var timeout time.Duration = 1

func checkErr(err error, args ...string) {
	if err != nil {
		fmt.Printf("Error: %q", err.Error())
	}
}

func sendKeys(cmd string){
	user32, err := user32util.LoadUser32DLL()
	if err != nil {
		log.Fatalf("failed to load user32.dll - %s", err.Error())
	}
	command := strings.ToUpper(cmd)
	for _, ch := range command {
		err := user32util.SendKeydbInput(user32util.KeybdInput{WVK: uint16(ch),}, user32)
		checkErr(err)
	}
	time.Sleep(timeout * time.Second)
	err = user32util.SendKeydbInput(user32util.KeybdInput{WVK: 0x0A,}, user32)
	checkErr(err)
	err = user32util.SendKeydbInput(user32util.KeybdInput{WVK: 0x0D,}, user32)
	checkErr(err)
	time.Sleep(timeout * time.Second)
}

func windowsR(){
	user32, err := user32util.LoadUser32DLL()
	if err != nil {
		log.Fatalf("failed to load user32.dll - %s", err.Error())
	}
	err = user32util.SendKeydbInput(user32util.KeybdInput{WVK: 0x5B,}, user32)
	checkErr(err)
	err = user32util.SendKeydbInput(user32util.KeybdInput{WVK: 0x52,}, user32)
	checkErr(err)
	err = user32util.SendKeydbInput(user32util.KeybdInput{WVK: 0x5B, DwFlags: 0x0002}, user32)
	checkErr(err)
	time.Sleep(timeout * time.Second)
}
func windowsCmdEsc(){
	user32, err := user32util.LoadUser32DLL()
	if err != nil {
		log.Fatalf("failed to load user32.dll - %s", err.Error())
	}
	//CTRL+ESC
	err = user32util.SendKeydbInput(user32util.KeybdInput{WVK: 0x11,}, user32)
	checkErr(err)
	err = user32util.SendKeydbInput(user32util.KeybdInput{WVK: 0x1B,}, user32)
	checkErr(err)
	//release windows key
	err = user32util.SendKeydbInput(user32util.KeybdInput{WVK: 0x11, DwFlags: 0x0002}, user32)
	checkErr(err)	
	time.Sleep(timeout * time.Second)
}

func main() {
	//https://raw.githubusercontent.com/stephen-fox/user32util/v0.3.1/examples/sendinput/main.go
	//flag.Parse()
	user32, err := user32util.LoadUser32DLL()
	if err != nil {
		log.Fatalf("failed to load user32.dll - %s", err.Error())
	}
	_ = user32

	sendKeys("ipconfig")
	//windowsCmdEsc()
	windowsR()
	sendKeys("cmd")
	sendKeys("ipconfig")
}