// 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 <sstream>

#include <utility>

#include "parquet/properties.h"

#include "arrow/io/buffered.h"

#include "arrow/io/memory.h"

#include "arrow/util/logging.h"

#include "arrow/util/thread_pool.h"

namespace parquet {

std::shared_ptr<ArrowInputStream> ReaderProperties::GetStream(

    std::shared_ptr<ArrowInputFile> source, int64_t start, int64_t num_bytes) {

  if (buffered_stream_enabled_) {

    // ARROW-6180 / PARQUET-1636 Create isolated reader that references segment

    // of source

    PARQUET_ASSIGN_OR_THROW(

        std::shared_ptr<::arrow::io::InputStream> safe_stream,

        ::arrow::io::RandomAccessFile::GetStream(source, start, num_bytes));

    PARQUET_ASSIGN_OR_THROW(

        auto stream, ::arrow::io::BufferedInputStream::Create(buffer_size_, pool_,

                                                              safe_stream, num_bytes));

    return stream;

  } else {

    PARQUET_ASSIGN_OR_THROW(auto data, source->ReadAt(start, num_bytes));

    if (data->size() != num_bytes) {

      std::stringstream ss;

      ss << "Tried reading " << num_bytes << " bytes starting at position " << start

         << " from file but only got " << data->size();

      throw ParquetException(ss.str());

    }

    return std::make_shared<::arrow::io::BufferReader>(data);

  }

}

::arrow::internal::Executor* ArrowWriterProperties::executor() const {

  return executor_ != nullptr ? executor_ : ::arrow::internal::GetCpuThreadPool();

}

ArrowReaderProperties default_arrow_reader_properties() {

  static ArrowReaderProperties default_reader_props;

  return default_reader_props;

}

std::shared_ptr<ArrowWriterProperties> default_arrow_writer_properties() {

  static std::shared_ptr<ArrowWriterProperties> default_writer_properties =

      ArrowWriterProperties::Builder().build();

  return default_writer_properties;

}

}  // namespace parquet