/*
 * Ouroboros - Copyright (C) 2016 - 2021
 *
 * Logging facilities
 *
 *    Dimitri Staessens <dimitri.staessens@ugent.be>
 *    Sander Vrijders   <sander.vrijders@ugent.be>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * version 2.1 as published by the Free Software Foundation.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., http://www.fsf.org/about/contact/.
 */

#ifndef OUROBOROS_LOGS_H
#define OUROBOROS_LOGS_H

#include <unistd.h>
#include <stdio.h>
#include <stdbool.h>
#include <syslog.h>

#ifndef OUROBOROS_PREFIX
#error You must define OUROBOROS_PREFIX before including this file
#endif

void log_init(bool sysout);

void log_fini(void);

#define CLR_RED     "\x1b[31m"
#define CLR_GREEN   "\x1b[32m"
#define CLR_YELLOW  "\x1b[33m"
#define CLR_RESET   "\x1b[0m"

#define DEBUG_CODE "DB"
#define ERROR_CODE "EE"
#define WARN_CODE  "WW"
#define INFO_CODE  "II"

extern bool log_syslog;

#define __olog(CLR, LVL, SYSLVL, ...)                                   \
        do {                                                            \
                if (log_syslog) {                                       \
                        syslog(SYSLVL, OUROBOROS_PREFIX ": "            \
                               __VA_ARGS__);                            \
                } else {                                                \
                        printf(CLR "==%05d== " OUROBOROS_PREFIX         \
                               "(" LVL "): ", getpid());                \
                        printf(__VA_ARGS__);                            \
                        printf(CLR_RESET "\n");                         \
                        fflush(stdout);                                 \
                }                                                       \
        } while (0)

#define log_err(...)  __olog(CLR_RED, ERROR_CODE, LOG_ERR, __VA_ARGS__)
#define log_warn(...) __olog(CLR_YELLOW, WARN_CODE, LOG_WARNING, __VA_ARGS__)
#define log_info(...) __olog(CLR_GREEN, INFO_CODE, LOG_INFO, __VA_ARGS__)

#ifdef CONFIG_OUROBOROS_DEBUG
#define log_dbg(...)  __olog("", DEBUG_CODE, LOG_DEBUG, __VA_ARGS__)
#else
#define log_dbg(...)  do { } while (0)
#endif

#endif /* OUROBOROS_LOGS_H */