/**
 * Copyright (c) 2020 rxi
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the MIT license. See `log.c` for details.
 */

#ifndef LOG_H
#define LOG_H

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

#define LOG_VERSION "0.1.0"

// Set to 0 to disable printing. This macro can be defined in another file.
#ifndef ENABLE_PRINT
#define ENABLE_PRINT 1
#endif

// #define ENABLE_CALLBACK 1

typedef struct {
	va_list ap;
	const char *fmt;
	const char *file;
	struct tm *time;
	void *udata;
	int line;
	int level;
} log_Event;

typedef void (*log_LogFn)(log_Event *ev);
typedef void (*log_LockFn)(bool lock, void *udata);

enum { LOGC_TRACE, LOGC_DEBUG, LOGC_INFO, LOGC_WARN, LOGC_ERROR, LOGC_FATAL };

#if ENABLE_PRINT == 1
#define log_trace(...) log_log(LOGC_TRACE, __FILE__, __LINE__, __VA_ARGS__)
#define log_debug(...) log_log(LOGC_DEBUG, __FILE__, __LINE__, __VA_ARGS__)
#define log_info(...) log_log(LOGC_INFO, __FILE__, __LINE__, __VA_ARGS__)

#elif ENABLE_PRINT == 2
#define log_trace(...)                                                         \
	do {                                                                   \
	} while (0)
#define log_debug(...)                                                         \
	do {                                                                   \
	} while (0)
#define log_info(...) log_log(LOGC_INFO, __FILE__, __LINE__, __VA_ARGS__)

#else
#define log_trace(...)                                                         \
	do {                                                                   \
	} while (0)
#define log_debug(...)                                                         \
	do {                                                                   \
	} while (0)
#define log_info(...)                                                          \
	do {                                                                   \
	} while (0)

#endif

#define log_warn(...) log_log(LOGC_WARN, __FILE__, __LINE__, __VA_ARGS__)
#define log_error(...) log_log(LOGC_ERROR, __FILE__, __LINE__, __VA_ARGS__)
#define log_fatal(...) log_log(LOGC_FATAL, __FILE__, __LINE__, __VA_ARGS__)

const char *log_level_string(int level);
void log_set_lock(log_LockFn fn, void *udata);
void log_set_level(int level);
void log_set_quiet(bool enable);
int log_add_callback(log_LogFn fn, void *udata, int level);
int log_add_fp(FILE *fp, int level);

void log_log(int level, const char *file, int line, const char *fmt, ...);

#endif