/*
 * nghttp2 - HTTP/2 C Library
 *
 * Copyright (c) 2012 Tatsuhiro Tsujikawa
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
#ifndef SHRPX_CONNECTION_HANDLER_H
#define SHRPX_CONNECTION_HANDLER_H

#include "shrpx.h"

#include <sys/types.h>
#include <sys/socket.h>

#include <memory>
#include <vector>

#include <openssl/ssl.h>

#include <ev.h>

#include "shrpx_downstream_connection_pool.h"

namespace shrpx {

class Http2Session;
class ConnectBlocker;
class AcceptHandler;
class Worker;
struct WorkerStat;
struct TicketKeys;

// TODO should be renamed as ConnectionHandler
class ConnectionHandler {
public:
  ConnectionHandler(struct ev_loop *loop);
  ~ConnectionHandler();
  int handle_connection(int fd, sockaddr *addr, int addrlen);
  void create_ssl_context();
  void create_worker_thread(size_t num);
  void worker_reopen_log_files();
  void worker_renew_ticket_keys(const std::shared_ptr<TicketKeys> &ticket_keys);
  struct ev_loop *get_loop() const;
  void create_http2_session();
  void create_http1_connect_blocker();
  const WorkerStat *get_worker_stat() const;
  void set_acceptor4(std::unique_ptr<AcceptHandler> h);
  AcceptHandler *get_acceptor4() const;
  void set_acceptor6(std::unique_ptr<AcceptHandler> h);
  AcceptHandler *get_acceptor6() const;
  void enable_acceptor();
  void disable_acceptor();
  void disable_acceptor_temporary(ev_tstamp t);
  void accept_pending_connection();
  void graceful_shutdown_worker();
  void join_worker();

private:
  DownstreamConnectionPool dconn_pool_;
  std::vector<std::unique_ptr<Worker>> workers_;
  struct ev_loop *loop_;
  // The frontend server SSL_CTX
  SSL_CTX *sv_ssl_ctx_;
  // The backend server SSL_CTX
  SSL_CTX *cl_ssl_ctx_;
  // Shared backend HTTP2 session. NULL if multi-threaded. In
  // multi-threaded case, see shrpx_worker.cc.
  std::unique_ptr<Http2Session> http2session_;
  std::unique_ptr<ConnectBlocker> http1_connect_blocker_;
  // bufferevent_rate_limit_group *rate_limit_group_;
  std::unique_ptr<AcceptHandler> acceptor4_;
  std::unique_ptr<AcceptHandler> acceptor6_;
  ev_timer disable_acceptor_timer_;
  std::unique_ptr<WorkerStat> worker_stat_;
  unsigned int worker_round_robin_cnt_;
};

} // namespace shrpx

#endif // SHRPX_CONNECTION_HANDLER_H