// Copyright (c) 2019 Egor Tensin <Egor.Tensin@gmail.com>
// This file is part of the "math-server" project.
// For details, see https://github.com/egor-tensin/math-server.
// Distributed under the MIT License.

#pragma once

#include <boost/date_time/posix_time/posix_time.hpp>
#include <boost/format.hpp>
#include <boost/system/error_code.hpp>

#include <ctime>
#include <iomanip>
#include <iostream>
#include <sstream>
#include <string>
#include <string_view>
#include <thread>
#include <utility>

namespace math::server::log {

namespace details {

inline std::thread::id get_tid() {
    return std::this_thread::get_id();
}

inline std::string get_timestamp() {
    const auto now = boost::posix_time::second_clock::universal_time();
    const auto tm = boost::posix_time::to_tm(now);
    std::ostringstream oss;
    oss << std::put_time(&tm, "%Y-%m-%d %H:%M:%S");
    return oss.str();
}

inline void log(const std::string& msg) {
    std::clog << get_timestamp() << " | " << get_tid() << " | " << msg << '\n';
}

} // namespace details

template <typename... Args>
inline void log(const std::string_view& fmt, Args&&... args) {
    details::log(boost::str((boost::format(fmt.data()) % ... % args)));
}

template <typename... Args>
inline void error(const std::string_view& fmt, Args&&... args) {
    details::log(boost::str((boost::format(fmt.data()) % ... % args)));
}

inline void error(const boost::system::error_code& ec) {
    details::log(ec.message());
}

} // namespace math::server::log