/*
   Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.

   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 St, Fifth Floor, Boston, MA 02110-1301  USA
*/

#ifndef _LOG_LEVEL_HPP
#define _LOG_LEVEL_HPP

#include <ndb_global.h>
#include <mgmapi_config_parameters.h>

#define JAM_FILE_ID 3


/**
 * 
 */
class LogLevel {
  friend class Config;
public:
  /**
   * Constructor
   */
  LogLevel();
  
  /**
   * Howto add a new event category:
   * 1. Add the new event category to EventCategory below
   * 2. Update #define _LOGLEVEL_CATEGORIES (found below) with the number of 
   *    items in EventCategory 
   * 3. Update LogLevelCategoryName in LogLevel.cpp
   * 4. Add the event in EventLogger
   */


  /**
   * Copy operator
   */
  LogLevel & operator= (const LogLevel &);

  enum EventCategory {
    llInvalid = -1,
    llStartUp = CFG_LOGLEVEL_STARTUP - CFG_MIN_LOGLEVEL,
    llShutdown = CFG_LOGLEVEL_SHUTDOWN - CFG_MIN_LOGLEVEL,
    llStatistic = CFG_LOGLEVEL_STATISTICS - CFG_MIN_LOGLEVEL,
    llCheckpoint = CFG_LOGLEVEL_CHECKPOINT - CFG_MIN_LOGLEVEL,
    llNodeRestart = CFG_LOGLEVEL_NODERESTART - CFG_MIN_LOGLEVEL,
    llConnection = CFG_LOGLEVEL_CONNECTION - CFG_MIN_LOGLEVEL,
    llInfo = CFG_LOGLEVEL_INFO - CFG_MIN_LOGLEVEL,
    llWarning = CFG_LOGLEVEL_WARNING - CFG_MIN_LOGLEVEL,
    llError = CFG_LOGLEVEL_ERROR - CFG_MIN_LOGLEVEL,
    llCongestion = CFG_LOGLEVEL_CONGESTION - CFG_MIN_LOGLEVEL,
    llDebug = CFG_LOGLEVEL_DEBUG - CFG_MIN_LOGLEVEL
    ,llBackup = CFG_LOGLEVEL_BACKUP - CFG_MIN_LOGLEVEL
    ,llSchema = CFG_LOGLEVEL_SCHEMA - CFG_MIN_LOGLEVEL
  };

  /**
   * No of categories
   */
#define _LOGLEVEL_CATEGORIES (CFG_MAX_LOGLEVEL - CFG_MIN_LOGLEVEL + 1)
  STATIC_CONST( LOGLEVEL_CATEGORIES = _LOGLEVEL_CATEGORIES );
  
  void clear();
  
  /**
   * Note level is valid as 0-15
   */
  int setLogLevel(EventCategory ec, Uint32 level = 7);
  
  /**
   * Get the loglevel (0-15) for a category
   */
  Uint32 getLogLevel(EventCategory ec) const;
  
  /**
   * Set this= max(this, ll) per category
   */
  LogLevel& set_max(const LogLevel& ll);
  
  bool operator==(const LogLevel& l) const { 
    return memcmp(this, &l, sizeof(* this)) == 0;
  }

private:
  /**
   * The actual data
   */
  Uint8 logLevelData[LOGLEVEL_CATEGORIES];
};

inline
LogLevel::LogLevel(){
  clear();
}

inline
LogLevel & 
LogLevel::operator= (const LogLevel & org){
  memcpy(logLevelData, org.logLevelData, sizeof(logLevelData));
  return * this;
}

inline
void
LogLevel::clear(){
  for(Uint32 i = 0; i<LOGLEVEL_CATEGORIES; i++){
    logLevelData[i] = 0;
  }
}

inline
int
LogLevel::setLogLevel(EventCategory ec, Uint32 level){
  if (ec >= 0 && (Uint32) ec < LOGLEVEL_CATEGORIES)
  {
    logLevelData[ec] = (Uint8)level;
    return 0;
  }
  return 1;
}

inline
Uint32
LogLevel::getLogLevel(EventCategory ec) const{
  assert(ec >= 0 && (Uint32) ec < LOGLEVEL_CATEGORIES);

  return (Uint32)logLevelData[ec];
}

inline
LogLevel & 
LogLevel::set_max(const LogLevel & org){
  for(Uint32 i = 0; i<LOGLEVEL_CATEGORIES; i++){
    if(logLevelData[i] < org.logLevelData[i])
      logLevelData[i] = org.logLevelData[i];
  }
  return * this;
}


#undef JAM_FILE_ID

#endif
