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/**
 *    Copyright (C) 2022-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.
 */

#ifndef _WIN32
#include "named_pipe.h"

#include <fmt/format.h>
#include <string>
#include <sys/stat.h>
#include <sys/types.h>

#include "mongo/db/storage/io_error_message.h"
#include "mongo/logv2/log.h"
#include "mongo/stdx/thread.h"

#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kStorage


namespace mongo {
using namespace fmt::literals;

NamedPipeOutput::NamedPipeOutput(const std::string& pipeRelativePath)
    : _pipeAbsolutePath(kDefaultPipePath + pipeRelativePath), _ofs() {
    remove(_pipeAbsolutePath.c_str());
    uassert(7005005,
            "Failed to create a named pipe, error={}"_format(
                getErrorMessage("mkfifo", _pipeAbsolutePath)),
            mkfifo(_pipeAbsolutePath.c_str(), 0664) == 0);
}

NamedPipeOutput::~NamedPipeOutput() {
    close();
    remove(_pipeAbsolutePath.c_str());
}

void NamedPipeOutput::open() {
    _ofs.open(_pipeAbsolutePath.c_str(), std::ios::binary | std::ios::app);
    if (!_ofs.is_open() || !_ofs.good()) {
        LOGV2_ERROR(7005009,
                    "Failed to open a named pipe",
                    "error"_attr = getErrorMessage("open", _pipeAbsolutePath));
    }
}

int NamedPipeOutput::write(const char* data, int size) {
    uassert(7005011, "Output must have been opened before writing", _ofs.is_open());
    _ofs.write(data, size);
    if (_ofs.fail()) {
        return -1;
    }
    return size;
}

void NamedPipeOutput::close() {
    if (_ofs.is_open()) {
        _ofs.close();
    }
}

NamedPipeInput::NamedPipeInput(const std::string& pipeRelativePath)
    : _pipeAbsolutePath(kDefaultPipePath + pipeRelativePath), _ifs() {}

NamedPipeInput::~NamedPipeInput() {
    close();
}

void NamedPipeInput::doOpen() {
    // Retry open every 1 ms for up to 1 sec in case writer has not created the pipe yet.
    int retries = 0;
    do {
        _ifs.open(_pipeAbsolutePath.c_str(), std::ios::binary | std::ios::in);
        if (!_ifs.is_open()) {
            stdx::this_thread::sleep_for(stdx::chrono::milliseconds(1));
            ++retries;
        }
    } while (!_ifs.is_open() && retries <= 1000);
}

int NamedPipeInput::doRead(char* data, int size) {
    _ifs.read(data, size);
    return _ifs.gcount();
}

void NamedPipeInput::doClose() {
    _ifs.close();
}

bool NamedPipeInput::isOpen() const {
    return _ifs.is_open();
}

bool NamedPipeInput::isGood() const {
    return _ifs.good();
}

bool NamedPipeInput::isFailed() const {
    return _ifs.fail();
}

bool NamedPipeInput::isEof() const {
    return _ifs.eof();
}
}  // namespace mongo
#endif