// 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.

#include "io/fs/file_reader.h"

#include <bthread/bthread.h>

#include <glog/logging.h>

#include "io/cache/cached_remote_file_reader.h"

#include "io/fs/file_system.h"

#include "util/async_io.h"

namespace doris::io {

const std::string FileReader::VIRTUAL_REMOTE_DATA_DIR = "virtual_remote_data_dir";

Status FileReader::read_at(size_t offset, Slice result, size_t* bytes_read,

                           const IOContext* io_ctx) {

    DCHECK(bthread_self() == 0);

    Status st = read_at_impl(offset, result, bytes_read, io_ctx);

    if (!st) {

        LOG(WARNING) << st;

    }

    return st;

}

Result<FileReaderSPtr> create_cached_file_reader(FileReaderSPtr raw_reader,

                                                 const FileReaderOptions& opts) {

    switch (opts.cache_type) {

    case io::FileCachePolicy::NO_CACHE:

        return raw_reader;

    case FileCachePolicy::FILE_BLOCK_CACHE:

        return std::make_shared<CachedRemoteFileReader>(std::move(raw_reader), opts);

    default:

        return ResultError(Status::InternalError("Unknown cache type: {}", opts.cache_type));

    }

}

} // namespace doris::io