webserv/includes/log.hpp

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   log.hpp                                            :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: adjoly <adjoly@student.42angouleme.fr>     +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2025/03/20 09:28:27 by adjoly            #+#    #+#             */
/*   Updated: 2025/04/29 17:28:36 by adjoly           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#pragma once

#include <fstream>
#include <iostream>
#include <sstream>
#include <stdexcept>
#include <string>

namespace webserv {

/**
 *	@brief	Used to log debug message
 *
 *	@note	Only work if VERBOSE mode is active
 */
inline void log(std::string emoji, std::string who, std::string str) {
#ifdef VERBOSE
	if (who.empty())
		std::cout << "「" << emoji << "」debug: " << str << std::endl;
	else
		std::cout << "「" << emoji << "」debug(" << who << "): " << str
				  << std::endl;
#else
	(void)emoji, (void)who, (void)str;
#endif
}

class Logger {
  public:
	Logger(void) : _ttyOnly(true) {
		log("➕", "Logger", "default constructor called");
	}
	Logger(const std::string &fileName) : _fileName(fileName) {
		log("➕", "Logger", "filename constructor called");
		_file.open(fileName.c_str(), std::ios::app);
		if (!_file.is_open() && !_ttyOnly) {
			_ttyOnly = true;
			warn("could not open log file, going tty only");
		} else
			_ttyOnly = false;
	}

	Logger(const Logger &other) : _ttyOnly(other._ttyOnly) {
		log("➕", "Logger", "copy constructor called");
		if (!other._ttyOnly) {
			_file.open(other._fileName.c_str(), std::ios::app);
			if (!_file.is_open()) {
				throw std::runtime_error("Could not open file: " +
										 other._fileName);
			}
		}
	}

	// Copy assignment operator
	Logger &operator=(const Logger &other) {
		log("➕", "Logger", "copy assignment constructor called");
		if (this != &other) {
			if (_file.is_open()) {
				_file.close();
			}
			_ttyOnly = other._ttyOnly;
			if (!other._ttyOnly) {
				_file.open(other._fileName.c_str(), std::ios::app);
				if (!_file.is_open()) {
					throw std::runtime_error("Could not open file: " +
											 other._fileName);
				}
			}
		}
		return *this;
	}
	~Logger(void) {
		log("➖", "Logger", "destructor called");
		if (_file.is_open())
			_file.close();
	}

	void info(const std::string &msg) {
		std::string ss = printPogitMsg("✏️", "webserv", "info", msg);
		std::cerr << ss << std::endl;
		if (!_ttyOnly) {
			_file << ss << std::endl;
		}
	}
	void warn(const std::string &msg) {
		std::string ss = printPogitMsg("🔨", "webserv", "warning", msg);
		std::cerr << ss << std::endl;
		if (!_ttyOnly) {
			_file << ss << std::endl;
		}
	}
	void error(const std::string &msg) {
		std::string ss = printPogitMsg("🚧", "webserv", "error", msg);
		std::cerr << ss << std::endl;
		if (!_ttyOnly) {
			_file << ss << std::endl;
		}
	}

	void debug(std::string msg) {
#ifdef VERBOSE
		std::string ss = printPogitMsg("🏗️", "webserv", "debug", msg);
		std::cerr << ss << std::endl;
		if (!_ttyOnly) {
			_file << ss << std::endl;
		}
#else
		(void)msg;
#endif
	}

  protected:
  private:
	std::string printPogitMsg(const std::string &emoji, const std::string &type,
							  const std::string &what, const std::string &msg) {
		std::stringstream os;
#ifdef TTY
		(void)emoji;
		if (what.empty())
			os << type << ":" << msg;
		else
			os << type << "(" << what << "):" << msg;
#else
		if (what.empty())
			os << "「" << emoji << "」" << type << ": " << msg;
		else
			os << "「" << emoji << "」" << type << "(" << what << "): " << msg;
#endif
		return os.str();
	}

	std::string	  _fileName;
	bool		  _ttyOnly;
	std::ofstream _file;
};

extern Logger *_log;

}; // namespace webserv