package main

import (
	"bufio"
	"flag"
	"fmt"
	"log"
	"net"
	"os"

	"golang.org/x/crypto/ssh"
)

var (
	user = flag.String("user", "iu9_32_09", "User name")
	pass = flag.String("pass", "bydfkbl5151", "Password for login")
	port = flag.Int("port", 22, "Port")
	host = flag.String("host", "185.20.227.83", "Host")
)

func main() {

	flag.Parse()

	config := &ssh.ClientConfig{
		User: *user,
		Auth: []ssh.AuthMethod{
			ssh.Password(*pass)},
		HostKeyCallback: func(hostname string, remote net.Addr, key ssh.PublicKey) error {
			return nil
		}}

	addr := fmt.Sprintf("%s:%d", *host, *port)

	// звоним на сервер
	client, err := ssh.Dial("tcp", addr, config)
	if err != nil {
		log.Fatal(err)
	}

	// создаём ssh сессию
	session, err := client.NewSession()
	if err != nil {
		log.Fatal(err)
	}
	// не забываем закрыть перед выходом
	defer session.Close()

	stdin, err := session.StdinPipe()
	if err != nil {
		log.Fatal(err)
	}

	session.Stdout = os.Stdout
	session.Stderr = os.Stderr

	err = session.Shell()
	if err != nil {
		log.Fatal(err)
	}

	scanner := bufio.NewScanner(os.Stdin)
	for scanner.Scan() {
		s := scanner.Text()
		_, err = fmt.Fprintf(stdin, "%s\n", s)
		if err != nil {
			log.Fatal(err)
		}
		if s == "exit" {
			break
		}
	}

	err = session.Wait()
	if err != nil {
		log.Fatal(err)
	}
}