// 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 "table/cuckoo/cuckoo_table_factory.h"

#include "db/dbformat.h"

#include "options/configurable_helper.h"

#include "rocksdb/utilities/options_type.h"

#include "table/cuckoo/cuckoo_table_builder.h"

#include "table/cuckoo/cuckoo_table_reader.h"

namespace ROCKSDB_NAMESPACE {

Status CuckooTableFactory::NewTableReader(

    const ReadOptions& /*ro*/, const TableReaderOptions& table_reader_options,

    std::unique_ptr<RandomAccessFileReader>&& file, uint64_t file_size,

    std::unique_ptr<TableReader>* table,

    bool /*prefetch_index_and_filter_in_cache*/) const {

  std::unique_ptr<CuckooTableReader> new_reader(new CuckooTableReader(

      table_reader_options.ioptions, std::move(file), file_size,

      table_reader_options.internal_comparator.user_comparator(), nullptr));

  Status s = new_reader->status();

  if (s.ok()) {

    *table = std::move(new_reader);

  }

  return s;

}

TableBuilder* CuckooTableFactory::NewTableBuilder(

    const TableBuilderOptions& table_builder_options,

    WritableFileWriter* file) const {

  // TODO: change builder to take the option struct

  return new CuckooTableBuilder(

      file, table_options_.hash_table_ratio, 64,

      table_options_.max_search_depth,

      table_builder_options.internal_comparator.user_comparator(),

      table_options_.cuckoo_block_size, table_options_.use_module_hash,

      table_options_.identity_as_first_hash, nullptr /* get_slice_hash */,

      table_builder_options.column_family_id,

      table_builder_options.column_family_name, table_builder_options.db_id,

      table_builder_options.db_session_id, table_builder_options.cur_file_num);

}

std::string CuckooTableFactory::GetPrintableOptions() const {

  std::string ret;

  ret.reserve(2000);

  const int kBufferSize = 200;

  char buffer[kBufferSize];

  snprintf(buffer, kBufferSize, "  hash_table_ratio: %lf\n",

           table_options_.hash_table_ratio);

  ret.append(buffer);

  snprintf(buffer, kBufferSize, "  max_search_depth: %u\n",

           table_options_.max_search_depth);

  ret.append(buffer);

  snprintf(buffer, kBufferSize, "  cuckoo_block_size: %u\n",

           table_options_.cuckoo_block_size);

  ret.append(buffer);

  snprintf(buffer, kBufferSize, "  identity_as_first_hash: %d\n",

           table_options_.identity_as_first_hash);

  ret.append(buffer);

  return ret;

}

static std::unordered_map<std::string, OptionTypeInfo> cuckoo_table_type_info =

    {

        {"hash_table_ratio",

         {offsetof(struct CuckooTableOptions, hash_table_ratio),

          OptionType::kDouble, OptionVerificationType::kNormal,

          OptionTypeFlags::kNone}},

        {"max_search_depth",

         {offsetof(struct CuckooTableOptions, max_search_depth),

          OptionType::kUInt32T, OptionVerificationType::kNormal,

          OptionTypeFlags::kNone}},

        {"cuckoo_block_size",

         {offsetof(struct CuckooTableOptions, cuckoo_block_size),

          OptionType::kUInt32T, OptionVerificationType::kNormal,

          OptionTypeFlags::kNone}},

        {"identity_as_first_hash",

         {offsetof(struct CuckooTableOptions, identity_as_first_hash),

          OptionType::kBoolean, OptionVerificationType::kNormal,

          OptionTypeFlags::kNone}},

        {"use_module_hash",

         {offsetof(struct CuckooTableOptions, use_module_hash),

          OptionType::kBoolean, OptionVerificationType::kNormal,

          OptionTypeFlags::kNone}},

};

CuckooTableFactory::CuckooTableFactory(const CuckooTableOptions& table_options)

    : table_options_(table_options) {

  RegisterOptions(&table_options_, &cuckoo_table_type_info);

}

TableFactory* NewCuckooTableFactory(const CuckooTableOptions& table_options) {

  return new CuckooTableFactory(table_options);

}

}  // namespace ROCKSDB_NAMESPACE