/**
 * @file log.hxx
 * @author Piotr Krygier (everyonencancode@gmail.com)
 * @brief Logging interfaces
 * @version 0.1
 * @date 2022-02-11
 *
 * @copyright Copyright (c) 2022
 *
 */

#ifndef LOG_H
#define LOG_H

#include <stdio.h>

/* Controls level of logging. TODO: Move this to cmake or some config */
#define LOG_LEVEL 6

#define LOG(level, ...) _LOG_##level(__VA_ARGS__)

#if LOG_LEVEL >= 1
#define _LOG_FATAL(...) __LOG(FATAL, __VA_ARGS__)
#else
#define _LOG_FATAL(...)
#endif

#if LOG_LEVEL >= 2
#define _LOG_ERROR(...) __LOG(ERROR, __VA_ARGS__)
#else
#define _LOG_ERROR(...)
#endif

#if LOG_LEVEL >= 3
#define _LOG_WARNING(...) __LOG(WARNING, __VA_ARGS__)
#else
#define _LOG_WARNING(...)
#endif

#if LOG_LEVEL >= 4
#define _LOG_INFO(...) __LOG(INFO, __VA_ARGS__)
#else
#define _LOG_INFO(...)
#endif

#if LOG_LEVEL >= 5
#define _LOG_DEBUG(...) __LOG(DEBUG, __VA_ARGS__)
#else
#define _LOG_DEBUG(...)
#endif

#if LOG_LEVEL >= 6
#define _LOG_TRACE(...) __LOG(TRACE, __VA_ARGS__)
#else
#define _LOG_TRACE(...)
#endif

/* Macro magic, that makes logging work. It's better than C++ solution anyway... */
#define _LOG_SIZEOF(...) __LOG_SIZEOF(__VA_ARGS__, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 0)
#define __LOG_SIZEOF(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20, N, \
                     ...)                                                                                          \
    N
#define _LOG_EVAL(x) x
#define __LOG(level, ...) ___LOG(_LOG_SIZEOF(__VA_ARGS__), level, __VA_ARGS__)
#define ___LOG(n, ...) ____LOG(n, __VA_ARGS__)
#define ____LOG(n, ...) ____LOG##n(__VA_ARGS__)
#define ____LOG1(level, format)      \
    fprintf(stdout,                  \
            "[" #level               \
            "]"                      \
            "\t%s:%d\t" format "\n", \
            __builtin_strrchr(__FILE__, '/') ? __builtin_strrchr(__FILE__, '/') + 1 : __FILE__, __LINE__)
#define ____LOG2(level, format, ...) \
    fprintf(stdout,                  \
            "[" #level               \
            "]"                      \
            "\t%s:%d\t" format "\n", \
            __builtin_strrchr(__FILE__, '/') ? __builtin_strrchr(__FILE__, '/') + 1 : __FILE__, __LINE__, __VA_ARGS__)

typedef enum
{
    TRACE = 1,
    DEBUG = 2,
    INFO = 3,
    WARNING = 4,
    ERROR = 5,
    FATAL = 6
} LogLevel;

#endif /* LOG_H */