/**
 *    Copyright (C) 2019-present MongoDB, Inc.
 *
 *    This program is free software: you can redistribute it and/or modify
 *    it under the terms of the Server Side Public License, version 1,
 *    as published by MongoDB, Inc.
 *
 *    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
 *    Server Side Public License for more details.
 *
 *    You should have received a copy of the Server Side Public License
 *    along with this program. If not, see
 *    <http://www.mongodb.com/licensing/server-side-public-license>.
 *
 *    As a special exception, the copyright holders give permission to link the
 *    code of portions of this program with the OpenSSL library under certain
 *    conditions as described in each individual source file and distribute
 *    linked combinations including the program with the OpenSSL library. You
 *    must comply with the Server Side Public License in all respects for
 *    all of the code used other than as permitted herein. If you modify file(s)
 *    with this exception, you may extend this exception to your version of the
 *    file(s), but you are not obligated to do so. If you do not wish to do so,
 *    delete this exception statement from your version. If you delete this
 *    exception statement from all source files in the program, then also delete
 *    it in the license file.
 */

#pragma once

#include <boost/log/attributes/value_extraction.hpp>
#include <boost/log/core/record_view.hpp>
#include <boost/log/expressions/message.hpp>
#include <boost/log/utility/formatting_ostream.hpp>

#include "mongo/logv2/attribute_argument_set.h"
#include "mongo/logv2/attributes.h"
#include "mongo/logv2/log_component.h"
#include "mongo/logv2/log_severity.h"
#include "mongo/logv2/log_tag.h"
#include "mongo/util/time_support.h"

#include <fmt/format.h>

namespace mongo {
namespace logv2 {

class TextFormatter {
public:
    TextFormatter() = default;

    // Boost log synchronizes calls to a formatter within a backend sink. If this is copied for some
    // reason (to another backend sink), no need to copy the buffer. This is just storage so we
    // don't need to allocate this memory every time. A final solution should format directly into
    // the formatting_ostream.
    TextFormatter(TextFormatter const&) {}

    static bool binary() {
        return false;
    };

    void operator()(boost::log::record_view const& rec, boost::log::formatting_ostream& strm) {
        using namespace boost::log;

        StringData message = extract<StringData>(attributes::message(), rec).get();
        const auto& attrs = extract<AttributeArgumentSet>(attributes::attributes(), rec).get();

        _buffer.clear();
        fmt::format_to(
            _buffer,
            "{} {:<2} {:<8} [{}] ",
            extract<Date_t>(attributes::timeStamp(), rec).get().toString(),
            extract<LogSeverity>(attributes::severity(), rec).get().toStringDataCompact(),
            extract<LogComponent>(attributes::component(), rec).get().getNameForLog(),
            extract<StringData>(attributes::threadName(), rec).get());
        strm.write(_buffer.data(), _buffer.size());

        if (extract<LogTag>(attributes::tags(), rec).get().has(LogTag::kStartupWarnings)) {
            strm << "** WARNING: ";
        }

        _buffer.clear();
        fmt::internal::vformat_to(_buffer, to_string_view(message), attrs._values);
        strm.write(_buffer.data(), _buffer.size());
    }

private:
    fmt::memory_buffer _buffer;
};

}  // namespace logv2
}  // namespace mongo