// Licensed to the Apache Software Foundation (ASF) under one

// or more contributor license agreements.  See the NOTICE file

// distributed with this work for additional information

// regarding copyright ownership.  The ASF licenses this file

// to you under the Apache License, Version 2.0 (the

// "License"); you may not use this file except in compliance

// with the License.  You may obtain a copy of the License at

//

//   http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing,

// software distributed under the License is distributed on an

// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

// KIND, either express or implied.  See the License for the

// specific language governing permissions and limitations

// under the License.

#pragma once

#include <gen_cpp/PaloBrokerService_types.h>

#include <gen_cpp/Types_types.h>

#include <atomic>

#include <memory>

#include "common/status.h"

#include "io/fs/broker_file_system.h"

#include "io/fs/file_reader.h"

#include "io/fs/file_system.h"

#include "io/fs/path.h"

#include "util/client_cache.h"

#include "util/slice.h"

namespace doris::io {

struct IOContext;

class BrokerFileReader final : public FileReader {

public:

    BrokerFileReader(const TNetworkAddress& broker_addr, Path path, size_t file_size, TBrokerFD fd,

                     std::shared_ptr<BrokerServiceConnection> connection, int64_t mtime = 0);

    ~BrokerFileReader() override;

    Status close() override;

    const Path& path() const override { return _path; }

    size_t size() const override { return _file_size; }

    bool closed() const override { return _closed.load(std::memory_order_acquire); }

    int64_t mtime() const override { return _mtime; }

protected:

    Status read_at_impl(size_t offset, Slice result, size_t* bytes_read,

                        const IOContext* io_ctx) override;

private:

    const Path _path;

    size_t _file_size;

    const TNetworkAddress _broker_addr;

    TBrokerFD _fd;

    std::shared_ptr<BrokerServiceConnection> _connection;

    int64_t _mtime;

    std::atomic<bool> _closed = false;

};

} // namespace doris::io