/**
 * @file compressor.h
 *
 * @section LICENSE
 *
 * The MIT License
 *
 * @copyright Copyright (c) 2017-2020 TileDB, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * @section DESCRIPTION
 *
 * This defines the tiledb CompressorType enum that maps to tiledb_compressor_t
 * C-api enum.
 */

#ifndef TILEDB_COMPRESSOR_H
#define TILEDB_COMPRESSOR_H

#include "tiledb/common/status.h"
#include "tiledb/sm/misc/constants.h"

#include <cassert>

using namespace tiledb::common;

namespace tiledb {
namespace sm {

/** Defines the compressor type. */
enum class Compressor : uint8_t {
  /** No compressor */
  NO_COMPRESSION = 0,
  /** Gzip compressor */
  GZIP = 1,
  /** Zstandard compressor */
  ZSTD = 2,
  /** LZ4 compressor */
  LZ4 = 3,
  /** Run-length encoding compressor */
  RLE = 4,
  /** Bzip2 compressor */
  BZIP2 = 5,
  /** Double-delta compressor */
  DOUBLE_DELTA = 6
};

/** Returns the string representation of the input compressor. */
inline const std::string& compressor_str(Compressor type) {
  switch (type) {
    case Compressor::NO_COMPRESSION:
      return constants::no_compression_str;
    case Compressor::GZIP:
      return constants::gzip_str;
    case Compressor::ZSTD:
      return constants::zstd_str;
    case Compressor::LZ4:
      return constants::lz4_str;
    case Compressor::RLE:
      return constants::rle_str;
    case Compressor::BZIP2:
      return constants::bzip2_str;
    case Compressor::DOUBLE_DELTA:
      return constants::double_delta_str;
    default:
      return constants::empty_str;
  }
}

/** Returns the compressor based on the string representation. */
inline Status compressor_enum(
    const std::string& compressor_type_str, Compressor* compressor) {
  if (compressor_type_str == constants::no_compression_str)
    *compressor = Compressor::NO_COMPRESSION;
  else if (compressor_type_str == constants::gzip_str)
    *compressor = Compressor::GZIP;
  else if (compressor_type_str == constants::zstd_str)
    *compressor = Compressor::ZSTD;
  else if (compressor_type_str == constants::lz4_str)
    *compressor = Compressor::LZ4;
  else if (compressor_type_str == constants::rle_str)
    *compressor = Compressor::RLE;
  else if (compressor_type_str == constants::bzip2_str)
    *compressor = Compressor::BZIP2;
  else if (compressor_type_str == constants::double_delta_str)
    *compressor = Compressor::DOUBLE_DELTA;
  else {
    return Status::Error("Invalid Compressor " + compressor_type_str);
  }
  return Status::Ok();
}
}  // namespace sm
}  // namespace tiledb

#endif  // TILEDB_COMPRESSOR_H