/*
 * This File is part of Davix, The IO library for HTTP based protocols
 * Copyright (C) CERN 2013
 * Author: Adrien Devresse <adrien.devresse@cern.ch>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
*/

#ifndef DAVIX_LOGGER_HPP
#define DAVIX_LOGGER_HPP

#include <cstdarg>
#include <utils/davix_types.hpp>



namespace Davix{


// log level
#define DAVIX_LOG_CRITICAL  1
#define DAVIX_LOG_WARNING   2
#define DAVIX_LOG_VERBOSE   3
#define DAVIX_LOG_DEBUG     4
#define DAVIX_LOG_TRACE     5
#define DAVIX_LOG_ALL       6

// log scope
#define DAVIX_LOG_FILE       (1<<0)
#define DAVIX_LOG_POSIX      (1<<1)
#define DAVIX_LOG_XML        (1<<2)
#define DAVIX_LOG_SSL        (1<<3)
#define DAVIX_LOG_HEADER     (1<<4)
#define DAVIX_LOG_BODY       (1<<5)
#define DAVIX_LOG_CHAIN      (1<<6)
#define DAVIX_LOG_CORE       (1<<7)
#define DAVIX_LOG_GRID       (1<<8)
#define DAVIX_LOG_SOCKET     (1<<9)
#define DAVIX_LOG_LOCKS      (1<<10)
#define DAVIX_LOG_HTTP       (1<<11)
#define DAVIX_LOG_S3         (1<<12)
#define DAVIX_LOG_SENSITIVE  (1<<13)
#define DAVIX_LOG_SCOPE_NEON (1<<29)
#define DAVIX_LOG_SCOPE_ALL        (~(0) ^ DAVIX_LOG_BODY)

// define string for log scopes
extern const char* SCOPE_FILE;      // Davix file interface
extern const char* SCOPE_HTTP;      // Http Request Scope
extern const char* SCOPE_S3;        // S3 authentication info
extern const char* SCOPE_POSIX;     // Davix posix interface
extern const char* SCOPE_XML;       // XML info and parser output
extern const char* SCOPE_SSL;       // SSL and cert details
extern const char* SCOPE_HEADER;    // Request and respond headers
extern const char* SCOPE_BODY;      // HTTP bodies
extern const char* SCOPE_CHAIN;     // IO chains info
extern const char* SCOPE_CORE;      // Config and misc info
extern const char* SCOPE_GRID;      // Misc info from 3rd parties
extern const char* SCOPE_SOCKET;    // Socket info
extern const char* SCOPE_LOCKS;     // WebDAV locking info
extern const char* SCOPE_SENSITIVE; // Sensitive information
extern const char* SCOPE_ALL;       // All of the above


// log a string to the Davix logger system
void logStr(int scope, int log_level, const std::string & str);

///
/// \brief getLogLevel
/// \return current davix Logger level
///
int getLogLevel();
///
/// \brief setLogLevel
/// \param logLevel
///
/// define davix logger level
void setLogLevel(int logLevel);

///
/// \brief getLogScope
/// \return current davix scope mask
///
int getLogScope();

///
/// \brief setLogScope
///
///  define davix scope mask.
///  Only the components covered by the mask will be available via the logging
void setLogScope(int mask);
///
/// \brief setLogScope
/// \param scope
/// define davix scope mask from a list of string separated by comma
void setLogScope(const std::string & scope);


///
/// \brief getScopeName
/// \param scope_mask
/// \return scope name of the first scope that match the mask
///  if none match, return ALL
///
std::string getScopeName(int scope_mask);

} // Davix




DAVIX_C_DECL_BEGIN



/// set the davix log mask
/// everything that is not covered by the mask is dropped
extern DAVIX_EXPORT void davix_set_log_level(int log_mask);

/// get current log mask
extern DAVIX_EXPORT int davix_get_log_level();

/// internal logger function
extern DAVIX_EXPORT void davix_logger(int log_mask, const char * msg, ...);

/// variadic version of internal logger function
extern DAVIX_EXPORT void davix_vlogger(int log_mask, const char* msg, va_list args);


/// @brief setup a log handler
///
/// redirect the davix log output to the function f_handler
/// setting up a log handler disable the std output log
///
/// @param fhandler : log handler callback
/// @param userdata : callback userdata
extern DAVIX_EXPORT void davix_set_log_handler( void (*fhandler)(void* userdata, int mgs_level, const char* msg), void* userdata);


DAVIX_C_DECL_END

#endif // DAVIX_LOGGER_HPP