/*! \file    debug.h
 * \author   Lorenzo Miniero <lorenzo@meetecho.com>
 * \copyright GNU General Public License v3
 * \brief    Logging and Debugging
 * \details  Implementation of a wrapper on printf (or g_print) to either log or debug.
 * \todo     Improve this wrappers to optionally save logs on file
 *
 * \ingroup core
 * \ref core
 */

#ifndef _JANUS_DEBUG_H
#define _JANUS_DEBUG_H

#include <glib.h>
#include <glib/gprintf.h>
#include "log.h"

extern int janus_log_level;
extern gboolean janus_log_timestamps;
extern gboolean janus_log_colors;

/** @name Janus log colors
 */
///@{
#define ANSI_COLOR_RED     "\x1b[31m"
#define ANSI_COLOR_GREEN   "\x1b[32m"
#define ANSI_COLOR_YELLOW  "\x1b[33m"
#define ANSI_COLOR_BLUE    "\x1b[34m"
#define ANSI_COLOR_MAGENTA "\x1b[35m"
#define ANSI_COLOR_CYAN    "\x1b[36m"
#define ANSI_COLOR_RESET   "\x1b[0m"
///@}

/** @name Janus log levels
 */
///@{
/*! \brief No debugging */
#define LOG_NONE     (0)
/*! \brief Fatal error */
#define LOG_FATAL    (1)
/*! \brief Non-fatal error */
#define LOG_ERR      (2)
/*! \brief Warning */
#define LOG_WARN     (3)
/*! \brief Informational message */
#define LOG_INFO     (4)
/*! \brief Verbose message */
#define LOG_VERB     (5)
/*! \brief Overly verbose message */
#define LOG_HUGE     (6)
/*! \brief Debug message (includes .c filename, function and line number) */
#define LOG_DBG      (7)
/*! \brief Maximum level of debugging */
#define LOG_MAX LOG_DBG

/*! \brief Coloured prefixes for errors and warnings logging. */
static const char *janus_log_prefix[] = {
/* no colors */
	"",
	"[FATAL] ",
	"[ERR] ",
	"[WARN] ",
	"",
	"",
	"",
	"",
/* with colors */
	"",
	ANSI_COLOR_MAGENTA "[FATAL]" ANSI_COLOR_RESET " ",
	ANSI_COLOR_RED "[ERR]" ANSI_COLOR_RESET " ",
	ANSI_COLOR_YELLOW "[WARN]" ANSI_COLOR_RESET " ",
	"",
	"",
	"",
	""
};
///@}

/** @name Janus log wrappers
 */
///@{
/*! \brief Simple wrapper to g_print/printf */
#define JANUS_PRINT janus_vprintf
/*! \brief Logger based on different levels, which can either be displayed
 * or not according to the configuration of the server.
 * The format must be a string literal. */
#define JANUS_LOG(level, format, ...) \
do { \
	if (level > LOG_NONE && level <= LOG_MAX && level <= janus_log_level) { \
		char janus_log_ts[64] = ""; \
		char janus_log_src[128] = ""; \
		if (janus_log_timestamps) { \
			struct tm janustmresult; \
			time_t janusltime = time(NULL); \
			localtime_r(&janusltime, &janustmresult); \
			strftime(janus_log_ts, sizeof(janus_log_ts), \
			         "[%a %b %e %T %Y] ", &janustmresult); \
		} \
		if (level == LOG_FATAL || level == LOG_ERR || level == LOG_DBG) { \
			snprintf(janus_log_src, sizeof(janus_log_src), \
			         "[%s:%s:%d] ", __FILE__, __FUNCTION__, __LINE__); \
		} \
		JANUS_PRINT("%s%s%s" format, \
			janus_log_ts, \
			janus_log_prefix[level | ((int)janus_log_colors << 3)], \
			janus_log_src, \
			##__VA_ARGS__); \
	} \
} while (0)
///@}

#endif