/**
 * @author Edouard DUPIN
 * 
 * @copyright 2011, Edouard DUPIN, all right reserved
 * 
 * @license APACHE v2.0 (see license file)
 */

#ifndef __ETK_LOG_H__
#define __ETK_LOG_H__

#include <etk/types.h>
#include <sstream>
#include <ostream>
#include <vector>

namespace etk {
	namespace log {
		/**
		 * @brief Log level is a simple list of all log availlable. This enum is used when setting a log and when user chose the level of log displayed.
		 */
		enum level {
			logLevelPrint = -1, //!< basic print for Help or result (never filtered)
			logLevelNone = 0, //!< no display requested
			logLevelCritical = 1, //!< Display only critical logs (note that critical generally assert with a backtrace (when we can))
			logLevelError = 2, //!< Display Error and critical logs
			logLevelWarning = 3, //!< Display log critical to warning
			logLevelInfo = 4, //!< Display log critical to information (removed in release mode)
			logLevelDebug = 5, //!< Display log critical to debug (removed in release mode)
			logLevelVerbose = 6 //!< Display all logs (removed in release and debug mode)
		};
		/**
		 * @brief Register an element in the log system
		 * @param[in] _name Name of the module
		 * @return reference Id of an instance name
		 */
		int32_t registerInstance(const std::string& _name);
		/**
		 * @brief Set the log level of a specific instance
		 * @param[in] _name Name of the intance
		 * @param[in] _id Id of the intance
		 * @param[in] _level New level to set on the instance
		 */
		void setLevel(const std::string& _name, enum level _level);
		//! @previous
		void setLevel(int32_t _id, enum level _level);
		/**
		 * @brief Set global debug level
		 * @param[in] _level New level to set on the instance
		 */
		void setLevel(enum level _level);
		/**
		 * @brief Get the current level of debug for a specific intance
		 * @param[in] _id Id Of the intance
		 * @return the enum casted in an integer ==> generise the API (not dependent of etk)
		 */
		int32_t getLevel(int32_t _id);
		/**
		 * @brief Get list of all intance
		 * @return the name list of all intance
		 */
		std::vector<std::string> getListInstance();
		/**
		 * @brief Set Color enable or disable.
		 * @param[in] _status New value of color.
		 */
		void setColor(bool _status);
		/**
		 * @brief Set Time display enable or disable.
		 * @param[in] _status New value.
		 */
		void setTime(bool _status);
		/**
		 * @brief Set Line display enable or disable.
		 * @param[in] _status New value.
		 */
		void setLine(bool _status);
		/**
		 * @brief Set Function display enable or disable.
		 * @param[in] _status New value.
		 */
		void setFunction(bool _status);
		/**
		 * @brief Set thread id enable or disable.
		 * @param[in] _status New value.
		 */
		void setThreadId(bool _status);
		/**
		 * @brief Set thread name enable or disable.
		 * @param[in] _status New value.
		 */
		void setThreadNameEnable(bool _status);
		/**
		 * @brief Set library display enable or disable.
		 * @param[in] _status New value.
		 */
		void setLibName(bool _status);
		/**
		 * @brief Call log to display
		 * @param[in] _id Id of the instance type
		 * @param[in] _level Level debug
		 * @param[in] _ligne Line of the debug
		 * @param[in] _className Class name of the debug
		 * @param[in] _funcName Function name for debug
		 * @param[in] _log Stream to log
		 */
		void logChar(int32_t _id, int32_t _level, int32_t _ligne, const char* _className, const char* _funcName, const char* _log);
		//! @previous
		void logStream(int32_t _id, int32_t _level, int32_t _ligne, const char* _className, const char* _funcName, const std::ostream& _log);
		//! @previous
		void logChar1(int32_t _id, int32_t _level, const char* _log);
		//! @previous
		void logStream1(int32_t _id, int32_t _level, const std::ostream& _log);
		/**
		 * @brief Display the current backtrace
		 * @param[in] _breakAtEnd assert program when backtrace is printed
		 */
		void displayBacktrace(bool _breakAtEnd = false, int32_t _removeElement=0);
	};
};
#ifdef __class__
	#undef  __class__
#endif
#define __class__ (NULL)

// generic define for all logs::
#define TK_LOG_BASE(logId,info,data) \
	do { \
		if (info <= etk::log::getLevel(logId)) { \
			std::stringbuf sb; \
			std::ostream tmpStream(&sb); \
			tmpStream << data; \
			etk::log::logStream(logId, info, __LINE__, __class__, __func__, tmpStream); \
		} \
	} while(0)

#endif