package shell

// old code and probably junk

import (
	"os"
	"os/exec"

	"go.wit.com/log"
)

// TODO: look at https://github.com/go-cmd/cmd/issues/20
// use go-cmd instead here?

var callback func(interface{}, int)

// var shellStdout *os.File
// var shellStderr *os.File

// var spewOn bool = false
// var quiet bool = false

// var msecDelay   int  = 20	// number of milliseconds to delay between reads with no data

// var bytesBuffer bytes.Buffer
// var bytesSplice []byte

func handleError(c interface{}, ret int) {
	log.Log(INFO, "shell.Run() Returned", ret)
	if callback != nil {
		callback(c, ret)
	}
}

func init() {
	callback = nil
}

func InitCallback(f func(interface{}, int)) {
	callback = f
}

func Unlink(filename string) bool {
	if err := os.Remove(filename); err != nil {
		return Exists(filename)
	} else {
		return Exists(filename)
	}
}

// run interactively. output from the cmd is in real time
// shows all the output. For example, 'ping -n localhost'
// shows the output like you would expect to see
func RunSimple(cmd []string) error {
	log.Log(INFO, "NewRun() ", cmd)

	return PathRunSimple("", cmd)
}

func PathRunSimple(workingpath string, cmd []string) error {
	log.Log(INFO, "NewRun() ", cmd)

	process := exec.Command(cmd[0], cmd[1:len(cmd)]...)
	// Set the working directory
	process.Dir = workingpath
	process.Stderr = os.Stderr
	process.Stdin = os.Stdin
	process.Stdout = os.Stdout
	process.Start()
	err := process.Wait()
	if err != nil {
		log.Log(INFO, "shell.Exec() err =", err)
	}
	return err
}

// return true if the filename exists (cross-platform)

// return true if the filename exists (cross-platform)
func Exists(filename string) bool {
	_, err := os.Stat(Path(filename))
	if os.IsNotExist(err) {
		return false
	}
	return true
}

// return true if the filename exists (cross-platform)
func IsDir(dirname string) bool {
	info, err := os.Stat(Path(dirname))
	if os.IsNotExist(err) {
		return false
	}
	return info.IsDir()
}