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// log.cc
// nono - programme du robot 2004. {{{
//
// Copyright (C) 2004 Nicolas Schodet
//
// Robot APB Team/Efrei 2004.
//        Web: http://assos.efrei.fr/robot/
//      Email: robot AT efrei DOT fr
//
// 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; either version 2 of the License, or
// (at your option) any later version.
// 
// 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// }}}
#include "log.h"
#include "logger.h"

Logger Log::logger_;

/// Constructeur.
Log::Log (const std::string &module)
    : std::ostream ((std::streambuf *) this),
      module_ (module),
      curLevel_ (info)
{
    init ();
}

/// Constructeur.
Log::Log (const std::string &module, const std::string &instance)
    : std::ostream ((std::streambuf *) this),
      module_ (module), instance_ (instance),
      curLevel_ (info)
{
    init ();
}

/// Param�tre le niveau de log pour la prochaine sortie.
Log &
Log::operator() (Level level)
{
    curLevel_ = level;
    return *this;
}

/// Traduit le niveau de log.
void
Log::toString (Level level, std::string &s)
{
    switch (level)
      {
      case none:
	s = "none"; break;
      case fatal:
	s = "fatal"; break;
      case error:
	s = "error"; break;
      case warning:
	s = "warning"; break;
      case info:
	s = "info"; break;
      case debug:
	s = "debug"; break;
      case verydebug:
	s = "verydebug"; break;
      default:
	s = "logunknown"; break;
      }
}

/// Traduit le niveau de log.
Log::Level
Log::toLevel (const std::string &level)
{
    switch (level[0])
      {
      case 'n':
	return none;
      case 'f':
	return fatal;
      case 'e':
	return error;
      case 'w':
	return warning;
      case 'i':
	return info;
      case 'd':
	return debug;
      case 'v':
	return verydebug;
      default:
	return levelReserved;
      }
}

/// Traduit le masque de niveau de log.
Log::Level
Log::toLevelMask (const std::string &level)
{
    switch (level[0])
      {
      case 'n':
	return static_cast<Level> (none);
      case 'f':
	return static_cast<Level> (fatal);
      case 'e':
	return static_cast<Level> (error | fatal);
      case 'w':
	return static_cast<Level> (warning | error | fatal);
      case 'i':
	return static_cast<Level> (info | warning | error | fatal);
      case 'd':
	return static_cast<Level> (debug | info | warning | error | fatal);
      case 'v':
	return static_cast<Level> (verydebug | debug | info | warning | error | fatal);
      default:
	return toLevel (level);
      }
}

/// Appell� lorsque le tampon streambuf d�borde.
int
Log::overflow (int c)
{
    if (c == '\n')
      {
	if (curLevel_ & levelMask_)
	    logger_.log (module_, instance_, curLevel_, buffer_);
	buffer_.erase ();
      }
    else
      {
	buffer_ += c;
      }
    return c;
}

/// Partie commune des constructeurs.
void
Log::init (void)
{
    levelMask_ = logger_.getLevel (module_);
}