package utl

import (
	"errors"
	"fmt"
	"os"
	"os/signal"
)

const (
	FmtTimeStr = "2006-01-02 15:04:05"
)

var (
	ErrNotImplemented     = errors.New("not implemented yet")
	ErrInterfaceTransform = errors.New("interface transform failed")
	ErrParameters         = errors.New("invalid parameters")
	ErrContainerEmpty     = errors.New("target container is empty")
	ErrNotExists          = errors.New("target not exists")
)

type H map[string]interface{}

func ErrForCode(code int) error {
	return errors.New(fmt.Sprintf("returned error code: %v", code))
}

func ErrPanic(err error) {
	if err != nil {
		panic(err)
	}
}

func UnUsed(v ...interface{}) {

}

func WaitForSignals(sigs ...os.Signal) os.Signal {
	chSig := make(chan os.Signal, 1)
	signal.Notify(chSig, sigs...)
	close(chSig)
	sig := <-chSig
	return sig
}