#ifndef __DBG_LOG_H
#define __DBG_LOG_H

#include <stdio.h>

/* DEBUG level */
#define DBG_ERROR   0
#define DBG_WARNING 1
#define DBG_INFO    2
#define DBG_LOG     3

#ifndef DBG_SECTION_NAME
#define DBG_SECTION_NAME "DBG"
#endif

#ifdef DBG_ENABLE

#ifndef DBG_LEVEL
#define DBG_LEVEL DBG_WARNING
#endif

/*
 * The color for terminal (foreground)
 * BLACK    30
 * RED      31
 * GREEN    32
 * YELLOW   33
 * BLUE     34
 * PURPLE   35
 * CYAN     36
 * WHITE    37
 */
#ifdef DBG_COLOR
#define _DBG_COLOR(n) printf("\033[" #n "m")
#define _DBG_LOG_HDR(lvl_name, color_n) \
    printf("\033[" #color_n "m[" lvl_name "/" DBG_SECTION_NAME "] ")
#define _DBG_LOG_X_END \
    printf("\033[0m\n")
#else
#define _DBG_COLOR(n)
#define _DBG_LOG_HDR(lvl_name, color_n) \
    printf("[" lvl_name "/" DBG_SECTION_NAME "] ")
#define _DBG_LOG_X_END \
    printf("\n")
#endif /* DBG_COLOR */

/*
 * static debug routine
 * NOTE: This is a NOT RECOMMENDED API. Please using LOG_X API.
 *       It will be DISCARDED later. Because it will take up more resources.
 */
#define dbg_log(level, fmt, ...)    \
    if ((level) <= DBG_LEVEL) {     \
        switch (level) {            \
        case DBG_ERROR:             \
            _DBG_LOG_HDR("E", 31);  \
            break;                  \
        case DBG_WARNING:           \
            _DBG_LOG_HDR("W", 33);  \
            break;                  \
        case DBG_INFO:              \
            _DBG_LOG_HDR("I", 32);  \
            break;                  \
        case DBG_LOG:               \
            _DBG_LOG_HDR("D", 0);   \
            break;                  \
        default:                    \
            break;                  \
        }                           \
        printf(fmt, ##__VA_ARGS__); \
        _DBG_COLOR(0);              \
    }

#define dbg_here                                 \
    if ((DBG_LEVEL) <= DBG_LOG) {                \
        printf(DBG_SECTION_NAME " Here %s:%d\n", \
               __FUNCTION__, __LINE__);          \
    }

#define dbg_enter                              \
    if ((DBG_LEVEL) <= DBG_LOG) {              \
        _DBG_COLOR(32);                        \
        printf(DBG_SECTION_NAME " Enter %s\n", \
               __FUNCTION__);                  \
        _DBG_COLOR(0);                         \
    }

#define dbg_exit                                  \
    if ((DBG_LEVEL) <= DBG_LOG) {                 \
        _DBG_COLOR(32);                           \
        printf(DBG_SECTION_NAME " Exit  %s:%d\n", \
               __FUNCTION__);                     \
        _DBG_COLOR(0);                            \
    }

#define dbg_log_line(lvl, color_n, fmt, ...) \
    do {                                     \
        _DBG_LOG_HDR(lvl, color_n);          \
        printf(fmt, ##__VA_ARGS__);          \
        _DBG_LOG_X_END;                      \
    } while (0)

#define dbg_raw(...) printf(__VA_ARGS__);

#else
#define dbg_log(level, fmt, ...)
#define dbg_here
#define dbg_enter
#define dbg_exit
#define dbg_log_line(lvl, color_n, fmt, ...)
#define dbg_raw(...)
#endif /* DBG_ENABLE */

#if (DBG_LEVEL >= DBG_LOG)
#define LOG_D(fmt, ...) dbg_log_line("D", 0, fmt, ##__VA_ARGS__)
#else
#define LOG_D(...)
#endif

#if (DBG_LEVEL >= DBG_INFO)
#define LOG_I(fmt, ...) dbg_log_line("I", 32, fmt, ##__VA_ARGS__)
#else
#define LOG_I(...)
#endif

#if (DBG_LEVEL >= DBG_WARNING)
#define LOG_W(fmt, ...) dbg_log_line("W", 33, fmt, ##__VA_ARGS__)
#else
#define LOG_W(...)
#endif

#if (DBG_LEVEL >= DBG_ERROR)
#define LOG_E(fmt, ...) dbg_log_line("E", 31, fmt, ##__VA_ARGS__)
#else
#define LOG_E(...)
#endif

#define LOG_RAW(...) dbg_raw(__VA_ARGS__)

#endif /* __DBG_LOG_H */