/*
Copyright Contributors to the libdnf project.

This file is part of libdnf: https://github.com/rpm-software-management/libdnf/

Libdnf is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 2.1 of the License, or
(at your option) any later version.

Libdnf 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 libdnf.  If not, see <https://www.gnu.org/licenses/>.
*/

#ifndef LIBDNF5_LOGGER_MEMORY_BUFFER_LOGGER_HPP
#define LIBDNF5_LOGGER_MEMORY_BUFFER_LOGGER_HPP

#include "logger.hpp"

#include "libdnf5/common/impl_ptr.hpp"
#include "libdnf5/defs.h"


namespace libdnf5 {

/// MemoryBufferLogger is an implementation of logging class that stores incoming logging messages into memory buffer.
/// It is usually used as temporary logger until a final logger is configured.
class LIBDNF_API MemoryBufferLogger : public Logger {
public:
    struct Item {
        std::chrono::time_point<std::chrono::system_clock> time;
        pid_t pid;
        Level level;
        std::string message;
    };

    explicit MemoryBufferLogger(std::size_t max_items_to_keep, std::size_t reserve = 0);
    ~MemoryBufferLogger();

    void write(
        const std::chrono::time_point<std::chrono::system_clock> & time,
        pid_t pid,
        Level level,
        const std::string & message) noexcept override;

    std::size_t get_items_count() const;
    const Item & get_item(std::size_t item_idx) const;
    void clear() noexcept;
    void write_to_logger(Logger & logger);

private:
    class LIBDNF_LOCAL Impl;
    ImplPtr<Impl> p_impl;
};

}  // namespace libdnf5

#endif
