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#include "mainwindow.h"
#include "ui_mainwindow.h"

#include <QDebug>
#include "libssh/legacy.h"
#include "libssh/callbacks.h"
#include "libssh/server.h"

MainWindow::MainWindow(QWidget *parent) :
  QMainWindow(parent),
  ui(new Ui::MainWindow)
{
  ui->setupUi(this);
}

MainWindow::~MainWindow()
{
  delete ui;
}

void MainWindow::onConnected()
{
    qDebug() << "SecureUploader: Connected";
}

void MainWindow::on_pushButton_clicked()
{

  ssh_session my_ssh_session;
  int rc;
  char *password;
  char *login = "rebrov";
  char *host = "192.168.1.1";
  int port = 2432;

  // Open session and set options
  my_ssh_session = ssh_new();
  if (my_ssh_session == NULL)
    exit(-1);
  ssh_options_set(my_ssh_session, SSH_OPTIONS_PORT, &port);
  ssh_options_set(my_ssh_session, SSH_OPTIONS_USER, &login);
  ssh_options_set(my_ssh_session, SSH_OPTIONS_HOST, &host);
  // Connect to server
  rc = ssh_connect(my_ssh_session);
  if (rc != SSH_OK)
  {
    fprintf(stderr, "Error connecting to localhost: %s\n",
            ssh_get_error(my_ssh_session));
    ssh_free(my_ssh_session);
    qDebug() << "Не то пальто";
    return;//exit(-1);
  }

  // Verify the server's identity
  // For the source code of verify_knowhost(), check previous example

  if (verify_knownhost(my_ssh_session) < 0)
  {
    ssh_disconnect(my_ssh_session);
    ssh_free(my_ssh_session);
    qDebug() << "Не тот плющ";
    return;//exit(-1);
  }
  // Authenticate ourselves
  password = "Fa#tme7";
  rc = ssh_userauth_password(my_ssh_session, NULL, password);
  if (rc != SSH_AUTH_SUCCESS)
  {
    fprintf(stderr, "Error authenticating with password: %s\n",
            ssh_get_error(my_ssh_session));
    ssh_disconnect(my_ssh_session);
    ssh_free(my_ssh_session);
    qDebug() << "Не там высадили";
    return;//exit(-1);
  }

  qDebug()<< "success!";
  ssh_disconnect(my_ssh_session);
  ssh_free(my_ssh_session);
  /*
  QSsh::SshConnectionParameters params;
  params.host = QString("192.168.1.1");
  params.userName = "rebrov";
  params.password = QString("Xz29#dm7");
  params.authenticationType = QSsh::SshConnectionParameters::AuthenticationByPassword;
  params.proxyType = QSsh::SshConnectionParameters::NoProxy;
  params.timeout = 30;
  params.port = 2432;

  m_connection = new QSsh::SshConnection(params, this); // TODO free this pointer!
  qDebug() << m_connection->connectionParameters().userName;
  connect(m_connection, SIGNAL(connected()), SLOT(onConnected()));
  connect(m_connection, SIGNAL(error(QSsh::SshError)), SLOT(onConnectionError(QSsh::SshError)));

  qDebug() << "SecureUploader: Connecting to host" << "192.168.1.150";

  m_connection->connectToHost();*/
}

int MainWindow::verify_knownhost(ssh_session session)
{
  int state, hlen;
  unsigned char *hash = NULL;
  char *hexa;
  char buf[10];
  state = ssh_is_server_known(session);
  hlen = ssh_get_pubkey_hash(session, &hash);
  if (hlen < 0)
    return -1;
  switch (state)
  {
    case SSH_SERVER_KNOWN_OK:
      break; /* ok */
    case SSH_SERVER_KNOWN_CHANGED:
      fprintf(stderr, "Host key for server changed: it is now:\n");
      ssh_print_hexa("Public key hash", hash, hlen);
      fprintf(stderr, "For security reasons, connection will be stopped\n");
      free(hash);
      return -1;
    case SSH_SERVER_FOUND_OTHER:
      fprintf(stderr, "The host key for this server was not found but an other"
        "type of key exists.\n");
      fprintf(stderr, "An attacker might change the default server key to"
        "confuse your client into thinking the key does not exist\n");
      free(hash);
      return -1;
    case SSH_SERVER_FILE_NOT_FOUND:
      fprintf(stderr, "Could not find known host file.\n");
      fprintf(stderr, "If you accept the host key here, the file will be"
       "automatically created.\n");
      /* fallback to SSH_SERVER_NOT_KNOWN behavior */
    case SSH_SERVER_NOT_KNOWN:
      hexa = ssh_get_hexa(hash, hlen);
      fprintf(stderr,"The server is unknown. Do you trust the host key?\n");
      fprintf(stderr, "Public key hash: %s\n", hexa);
      free(hexa);
      if (fgets(buf, sizeof(buf), stdin) == NULL)
      {
        free(hash);
        return -1;
      }
      if (strncasecmp(buf, "yes", 3) != 0)
      {
        free(hash);
        return -1;
      }
      if (ssh_write_knownhost(session) < 0)
      {
        fprintf(stderr, "Error %s\n", strerror(errno));
        free(hash);
        return -1;
      }
      break;
    case SSH_SERVER_ERROR:
      fprintf(stderr, "Error %s", ssh_get_error(session));
      free(hash);
      return -1;
  }
  free(hash);
  return 0;
}

LIBSSH_API int ssh_options_get(ssh_session session, enum ssh_options_e type,
    char **value);