/*
 * Copyright (c) 2015, 2021, Oracle and/or its affiliates.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2.0,
 * as published by the Free Software Foundation.
 *
 * This program is also distributed with certain software (including
 * but not limited to OpenSSL) that is licensed under separate terms,
 * as designated in a particular file or component or in included license
 * documentation.  The authors of MySQL hereby grant you an additional
 * permission to link the program and your derivative works with the
 * separately licensed software that they have included with MySQL.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License, version 2.0, for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301  USA
 */

#ifndef _NGS_CLIENT_INTERFACE_H_
#define _NGS_CLIENT_INTERFACE_H_

#include "ngs_common/chrono.h"
#include "ngs/interface/session_interface.h"
#include "ngs_common/connection_vio.h"

namespace ngs
{

class Server_interface;

class Client_interface
{
public:
  typedef uint64_t Client_id;

  enum Client_state
  {
    Client_invalid,
    Client_accepted,
    Client_accepted_with_session,
    Client_authenticating_first,
    Client_running,
    Client_closing,
    Client_closed
  };

public:
  virtual ~Client_interface() { }

  virtual Server_interface &server() const = 0;
  virtual Connection_vio  &connection() = 0;

  virtual void activate_tls() = 0;

public: // Notifications from Server object
  virtual void on_auth_timeout() = 0;
  virtual void on_server_shutdown() = 0;

  virtual void   run(const bool skip_resolve_name) = 0;
  virtual Mutex &get_session_exit_mutex() = 0;

public:
  virtual const char *client_address() const = 0;
  virtual const char *client_hostname() const = 0;
  virtual const char *client_id() const = 0;
  virtual Client_id   client_id_num() const = 0;
  virtual int         client_port() const = 0;

  virtual void reset_accept_time() = 0;
  virtual chrono::time_point get_accept_time() const = 0;
  virtual Client_state  get_state() const = 0;
  virtual bool          supports_expired_passwords() = 0;


  virtual ngs::shared_ptr<Session_interface> session() = 0;

public:
  virtual void on_session_reset(Session_interface &s) = 0;
  virtual void on_session_close(Session_interface &s) = 0;
  virtual void on_session_auth_success(Session_interface &s) = 0;

  virtual void disconnect_and_trigger_close() = 0;

};

} // namespace ngs

#endif // _NGS_CLIENT_INTERFACE_H_
