//  Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.

//  This source code is licensed under both the GPLv2 (found in the

//  COPYING file in the root directory) and Apache 2.0 License

//  (found in the LICENSE.Apache file in the root directory).

//

#include "rocksdb/convenience.h"

#include "db/convenience_impl.h"

#include "db/db_impl/db_impl.h"

#include "util/cast_util.h"

namespace ROCKSDB_NAMESPACE {

void CancelAllBackgroundWork(DB* db, bool wait) {

  (static_cast_with_check<DBImpl>(db->GetRootDB()))

      ->CancelAllBackgroundWork(wait);

}

Status DeleteFilesInRange(DB* db, ColumnFamilyHandle* column_family,

                          const Slice* begin, const Slice* end,

                          bool include_end) {

  RangePtr range(begin, end);

  return DeleteFilesInRanges(db, column_family, &range, 1, include_end);

}

Status DeleteFilesInRanges(DB* db, ColumnFamilyHandle* column_family,

                           const RangePtr* ranges, size_t n, bool include_end) {

  return (static_cast_with_check<DBImpl>(db->GetRootDB()))

      ->DeleteFilesInRanges(column_family, ranges, n, include_end);

}

Status VerifySstFileChecksum(const Options& options,

                             const EnvOptions& env_options,

                             const std::string& file_path) {

  // TODO: plumb Env::IOActivity, Env::IOPriority

  const ReadOptions read_options;

  return VerifySstFileChecksum(options, env_options, read_options, file_path);

}

Status VerifySstFileChecksum(const Options& options,

                             const EnvOptions& env_options,

                             const ReadOptions& _read_options,

                             const std::string& file_path,

                             const SequenceNumber& largest_seqno) {

  if (_read_options.io_activity != Env::IOActivity::kUnknown) {

    return Status::InvalidArgument(

        "Can only call VerifySstFileChecksum with `ReadOptions::io_activity` "

        "is "

        "`Env::IOActivity::kUnknown`");

  }

  ReadOptions read_options(_read_options);

  return VerifySstFileChecksumInternal(options, env_options, read_options,

                                       file_path, largest_seqno);

}

Status VerifySstFileChecksumInternal(const Options& options,

                                     const EnvOptions& env_options,

                                     const ReadOptions& read_options,

                                     const std::string& file_path,

                                     const SequenceNumber& largest_seqno) {

  std::unique_ptr<FSRandomAccessFile> file;

  uint64_t file_size;

  InternalKeyComparator internal_comparator(options.comparator);

  ImmutableOptions ioptions(options);

  Status s = ioptions.fs->NewRandomAccessFile(

      file_path, FileOptions(env_options), &file, nullptr);

  if (s.ok()) {

    s = ioptions.fs->GetFileSize(file_path, IOOptions(), &file_size, nullptr);

  } else {

    return s;

  }

  if (!s.ok()) {

    return s;

  }

  std::unique_ptr<TableReader> table_reader;

  std::unique_ptr<RandomAccessFileReader> file_reader(

      new RandomAccessFileReader(

          std::move(file), file_path, ioptions.clock, nullptr /* io_tracer */,

          ioptions.stats /* stats */,

          Histograms::SST_READ_MICROS /* hist_type */,

          nullptr /* file_read_hist */, ioptions.rate_limiter.get()));

  const bool kImmortal = true;

  auto reader_options = TableReaderOptions(

      ioptions, options.prefix_extractor, env_options, internal_comparator,

      options.block_protection_bytes_per_key, false /* skip_filters */,

      !kImmortal, false /* force_direct_prefetch */, -1 /* level */);

  reader_options.largest_seqno = largest_seqno;

  s = ioptions.table_factory->NewTableReader(

      read_options, reader_options, std::move(file_reader), file_size,

      &table_reader, false /* prefetch_index_and_filter_in_cache */);

  if (!s.ok()) {

    return s;

  }

  s = table_reader->VerifyChecksum(read_options,

                                   TableReaderCaller::kUserVerifyChecksum);

  return s;

}

}  // namespace ROCKSDB_NAMESPACE