// Copyright (c) 1999 - 2025 kio@little-bat.de
// BSD-2-Clause license
// https://opensource.org/licenses/BSD-2-Clause


/*
	log to logfile or stderr
	the source files are either "log_to_file.cpp" or "log_to_console.cpp".
*/

#pragma once
#include "kio/kio.h"


// log_to_file.cpp only!
enum LogRotation { NEVER, DAILY, WEEKLY, MONTHLY };
extern bool log2console; // may be switched on/off any time

// open logfile
// log_to_file.cpp only!
extern void openLogfile(
	cstr appl_name, cstr dirpath, LogRotation, uint max_logfiles = 10, //
	bool log2console = debug, bool with_date = 1, bool with_msec = 0, bool utc_timestamps = 0);


/*
	Logging depending on 'loglevel':
	`loglevel` must be #defined before any #include.
*/

#if defined RELEASE
  #undef loglevel
#endif
#if !defined loglevel
  #define loglevel 0
#endif

extern void logline(cstr, ...) __printflike(1, 2);
extern void logline(cstr, va_list) __printflike(1, 0);
extern void log(cstr, ...) __printflike(1, 2);
extern void log(cstr, va_list) __printflike(1, 0);
extern void logNl();

#define xlog(...)	   (loglevel < 1 ? void(0) : log(__VA_ARGS__))
#define xlogline(...)  (loglevel < 1 ? void(0) : logline(__VA_ARGS__))
#define xdebugstr(...) (loglevel < 1 ? void(0) : debugstr(__VA_ARGS__))
#define xlogNl()	   (loglevel < 1 ? void(0) : logNl())

#define xxlog(...)		(loglevel < 2 ? void(0) : log(__VA_ARGS__))
#define xxlogline(...)	(loglevel < 2 ? void(0) : logline(__VA_ARGS__))
#define xxdebugstr(...) (loglevel < 2 ? void(0) : debugstr(__VA_ARGS__))
#define xxlogNl()		(loglevel < 2 ? void(0) : logNl())


// indent logging for the lifetime of a function:
struct LogIndent
{
	static void indent(int);
	LogIndent(cstr fmt, ...) __printflike(2, 3)
	{
		va_list va;
		va_start(va, fmt);
		logline(fmt, va);
		va_end(va);
		indent(+2);
	}
	~LogIndent() { indent(-2); }
};

#define logIn(...) LogIndent _log_indent(__VA_ARGS__)

#if loglevel >= 1
  #define xlogIn logIn
#else
  #define xlogIn(...) (1 ? void(0) : log(__VA_ARGS__)) // use the args but prune them
#endif

#if loglevel >= 2
  #define xxlogIn logIn
#else
  #define xxlogIn(...) (1 ? void(0) : log(__VA_ARGS__))
#endif


/*





















*/