/*
 * This is an auditd plugin for sending auditd data
 * to clickhouse DB.
 * Copyright (C) 2020 Aleksei Nikiforov <darktemplar@basealt.ru>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <https://www.gnu.org/licenses/>.
 *
 */

#ifndef AUDITD_PLUGIN_CLICKHOUSE_LOGGING_HPP
#define AUDITD_PLUGIN_CLICKHOUSE_LOGGING_HPP

#include <string>
#include <list>
#include <mutex>
#include <utility>
#include <stdio.h>
#include <stdarg.h>

class Logger
{
public:
	static Logger& instance();

	static void open(const char *filename);
	static void initialize();
	static void write(const char *format, ...);
	static void dump();

private:
	Logger();
	~Logger();

	void open_impl(const char *filename);
	void initialize_impl();
	void write_impl(const char *format, va_list args);
	void dump_impl();

	std::string getdatestring() const;

	Logger(const Logger &other) = delete;
	Logger& operator=(const Logger &other) = delete;

	std::list<std::pair<std::string, std::string> > m_lines;
	std::string m_logfile_name;
	bool m_initialized;

	static std::mutex s_mutex;
};

#endif /* AUDITD_PLUGIN_CLICKHOUSE_LOGGING_HPP */