#include <stdarg.h>
#include <stdio.h>

#define LOG_DEBUG 0
#define LOG_EVENT 1
#define LOG_NOTICE 2
#define LOG_WARNING 3
#define LOG_ERROR 4

// These defines should be used to get "verbosity" of spercific logging level. Like:
//	if (DEBUG_LEVEL > 2)
//		ast_log(LOG_DEBUG, ......)
// Below they have hard-coded values. But in real life they should point to some global 
// variables. Like:
//	#define DEBUG_LEVEL	options_debug
//

#define DEBUG_LEVEL	0
#define EVENT_LEVEL	1
#define NOTICE_LEVEL	1
#define WARNING_LEVEL	1
#define ERROR_LEVEL	1

void __ast_log(int level, const char *file, int line, const char *function, const char *fmt, ...)
        __attribute__ ((format (printf, 5, 6)));

#define ast_log(level, ...)  {									\
	if (level == LOG_DEBUG) {								\
		if (DEBUG_LEVEL) {								\
			__ast_log(level, __FILE__, __LINE__, __PRETTY_FUNCTION__, __VA_ARGS__);	\
		}										\
	} else if (level == LOG_EVENT) {							\
		if (EVENT_LEVEL) {								\
			__ast_log(level, __FILE__, __LINE__, __PRETTY_FUNCTION__, __VA_ARGS__);	\
		}										\
	} else if (level == LOG_NOTICE) {							\
		if (NOTICE_LEVEL) {								\
			__ast_log(level, __FILE__, __LINE__, __PRETTY_FUNCTION__, __VA_ARGS__);	\
		}										\
	} else if (level == LOG_WARNING) {							\
		if (WARNING_LEVEL) {								\
			__ast_log(level, __FILE__, __LINE__, __PRETTY_FUNCTION__, __VA_ARGS__);	\
		}										\
	} else if (level == LOG_ERROR) {							\
		if (ERROR_LEVEL) {								\
			__ast_log(level, __FILE__, __LINE__, __PRETTY_FUNCTION__, __VA_ARGS__);	\
		}										\
	} else {										\
		__ast_log(level, __FILE__, __LINE__, __PRETTY_FUNCTION__, __VA_ARGS__);		\
	}											\
}

// Example of shorthand macros if we need them...
#define ast_log_debug(...)  									\
	if (DEBUG_LEVEL) {									\
		__ast_log(LOG_DEBUG, __FILE__, __LINE__, __PRETTY_FUNCTION__, __VA_ARGS__);	\
	}

#define ast_log_error(...)  									\
	if (ERROR_LEVEL) {									\
		__ast_log(LOG_ERROR, __FILE__, __LINE__, __PRETTY_FUNCTION__, __VA_ARGS__);	\
	}
// ...

void __ast_log(int level, const char *file, int line, const char *function, const char *fmt, ...)
{
	va_list ap;
	va_start(ap, fmt);
	printf("<%d> %s:%d - ", level, file, line);
	vprintf(fmt, ap);
	va_end(ap);
}

int main(int argc, char** argv)
{
	ast_log(LOG_DEBUG, "Hello\n");
	ast_log(LOG_ERROR, "%d + %d = %s\n", 2, 2, "4");

	ast_log_debug("Hello\n");
	ast_log_error("%d + %d = %s\n", 2, 2, "4");
};