/* Copyright (C) 2014 InfiniDB, Inc.

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License
   as published by the Free Software Foundation; version 2 of
   the License.

   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 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 Street, Fifth Floor, Boston,
   MA 02110-1301, USA. */

#include <boost/thread/mutex.hpp>

#define LOG_BUF_SIZE 256
#define TIMESTAMP_SIZE 16
#define TIME_BUF_SIZE 36

class WinSyslog
{
 public:
  /**
   * @brief dtor
   *        Might work as private, but not sure.
   */
  ~WinSyslog();
  /**
   * @brief Singleton accessor.
   *        Doesn't need locking because we use early construction.
   */
  static WinSyslog* instance()
  {
    if (!fpSysLog)
      fpSysLog = new WinSyslog();

    return fpSysLog;
  };

  int OpenLog()
  {
    return 0;
  };
  int CloseLog()
  {
    return 0;
  };

  /**
   * @brief Logging function.
   *        Called by ::syslog to do the logging
   */
  int Log(int priority, const char* format, va_list& args);

 private:
  // Disable public construction, destruction and assignment
  WinSyslog();
  WinSyslog(WinSyslog&);
  void operator=(WinSyslog const&);

  /**
   * @brief Archiving function.
   *        Called by Log() at midnight to archive the log
   *        file and create a new one
   */
  void Archive(const tm& nowtm);

  time_t fLastArchiveTime;
  int fLastArchiveDay;
  string fLogDirName;
  string fLogFileName;
  string fTimeFileName;
  char fLogLineHeader[LOG_BUF_SIZE];
  int fLogLineheaderSize;

  // Singleton pointer
  static WinSyslog* fpSysLog;
  // Synchronize objects for Archiving.
  static boost::mutex fMutex;
  static HANDLE fhMutex;
  static bool fbGoodIPMutex;
};