package sshhop

import (
	"flag"
	"log"
	"golang.org/x/crypto/ssh"
	"io/ioutil"
)


func(c *Client) Start(){

	//The intermediary server for port binding
	serverHostname := flag.String("server", "alpine.cse.unr.edu", "Intermediate Server")
	username := flag.String("username", "user", "Username")
	privKey  := flag.String("privkey", "/nfs/home/user/.ssh/id_rsa", "Private Key")
	
	var endpoints EndpointsFlag
	flag.Var(&endpoints,"endpoints", "Local and remote endpoints")
	flag.Parse()

	if len(endpoints) < 1 {
		log.Printf("No endpoints defined: %d\n", len(endpoints))

		endpoints = make(EndpointsFlag, 0)
		endpoints = append(endpoints, "www.cse.unr.edu:22")
		endpoints = append(endpoints, "www.cse.unr.edu:22")
		endpoints = append(endpoints, "www.cse.unr.edu:22")
	}


	// 27013
	serverEndpoint := &Endpoint{
		Host: *serverHostname,
		Port: 22,
	}

	key, err := ioutil.ReadFile(*privKey)
	if err != nil {
		log.Fatalf("Unable to read private key: %v", err)
	}


	// Create the Signer for this private key.
	signer, err := ssh.ParsePrivateKey(key)
	if err != nil {
		log.Fatalf("unable to parse private key: %v", err)
	}
	
	sshConfig := &ssh.ClientConfig{
		User: *username,
		HostKeyCallback: KeyPrint,
		Auth: []ssh.AuthMethod{
			ssh.PublicKeys(signer),
		},
	}

	tunnel := &SSHtunnel{
		Config: sshConfig,
		Server: serverEndpoint,
		Remote: endpoints,
	}

	tunnel.Start()
}