package main

import (
	"bufio"
	"fmt"
	"os"
	"strings"
	"syscall"
	"io"
	"golang.org/x/crypto/ssh"
	"golang.org/x/crypto/ssh/terminal"
)

func main() {

	username, password := credentials()

	sshConfig := &ssh.ClientConfig{
		User: username,
		Auth: []ssh.AuthMethod{
			ssh.Password(password)},
	}
	sshConfig.SetDefaults()

	client, err := ssh.Dial("tcp", "lgserv3.stud.cs.uit.no:22", sshConfig)

	session, err := client.NewSession()

	stdin, err := session.StdinPipe()
	if err != nil {
		panic(err)
	}
	go io.Copy(stdin, os.Stdin)

	stdout, err := session.StdoutPipe()
	if err != nil {
		panic(err)
	}
	go io.Copy(os.Stdout, stdout)

	stderr, err := session.StderrPipe()
	if err != nil {
	panic(err)
	}
	go io.Copy(os.Stderr, stderr)

	err = session.Run("ls -l $LC_USR_DIR")

}



func credentials() (string, string) {
	reader := bufio.NewReader(os.Stdin)

	fmt.Print("Enter Username: ")
	username, _ := reader.ReadString('\n')

	fmt.Print("Enter Password: ")
	bytePassword, _ := terminal.ReadPassword(int(syscall.Stdin))

	password := string(bytePassword)

	return strings.TrimSpace(username), strings.TrimSpace(password)
}

/*
func PublicKeyFile(file string) ssh.AuthMethod {
	buffer, err := ioutil.ReadFile(file)
	if err != nil {
		return nil
	}

	key, err := ssh.ParsePrivateKey(buffer)
	if err != nil {
		return nil
	}
	return ssh.PublicKeys(key)
}*/