/* Copyright (C) 2014 InfiniDB, Inc.

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License
   as published by the Free Software Foundation; version 2 of
   the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
   MA 02110-1301, USA. */

//
// $Id: columncommand.h 2057 2013-02-13 17:00:10Z pleblanc $
// C++ Interface: columncommand
//
// Description:
//
//
// Author: Patrick LeBlanc <pleblanc@calpont.com>, (C) 2008
//
// Copyright: See COPYING file that comes with this distribution
//
//

#pragma once

#include <memory>
#include "columnwidth.h"
#include "command.h"
#include "calpontsystemcatalog.h"

namespace primitiveprocessor
{
// Warning. As of 6.1.1 ColumnCommand has some code duplication.
// There are number of derived classes specialized by column width.
// There are also legacy generic CC methods used by PseudoCC.
class ColumnCommand : public Command
{
 public:
  ColumnCommand();
  ColumnCommand(execplan::CalpontSystemCatalog::ColType& aColType);
  ~ColumnCommand() override;

  inline uint64_t getLBID() override
  {
    return lbid;
  }
  inline uint8_t getWidth()
  {
    return colType.colWidth;
  }
  inline uint8_t getScale()
  {
    return colType.scale;
  }
  uint16_t getFilterCount()
  {
    return filterCount;
  }
  const execplan::CalpontSystemCatalog::ColType& getColType()
  {
    return colType;
  }

  void execute() override;
  void execute(int64_t* vals);  // used by RTSCommand to redirect values
  void prep(int8_t outputType, bool absRids) override;
  void project() override;
  void projectIntoRowGroup(rowgroup::RowGroup& rg, uint32_t pos) override;
  void nextLBID() override;
  bool isScan()
  {
    return _isScan;
  }

  bool hasAuxCol() const
  {
    return hasAuxCol_;
  }
  uint64_t getLBIDAux() const
  {
    return lbidAux;
  }

  void createCommand(messageqcpp::ByteStream&) override;
  void createCommand(execplan::CalpontSystemCatalog::ColType& aColType, messageqcpp::ByteStream&);
  void resetCommand(messageqcpp::ByteStream&) override;
  void setMakeAbsRids(bool m) override
  {
    makeAbsRids = m;
  }
  bool willPrefetch();
  int64_t getLastLbid();
  void getLBIDList(uint32_t loopCount, std::vector<int64_t>* lbids) override;

  SCommand duplicate() override;
  bool operator==(const ColumnCommand&) const;
  bool operator!=(const ColumnCommand&) const;

  /* OR hacks */
  void setScan(bool b)
  {
    _isScan = b;
  }
  void disableFilters();
  void enableFilters();

  int getCompType() const override
  {
    return colType.compressionType;
  }

 protected:
  virtual void loadData();
  template <int W>
  void _loadData();
  void updateCPDataNarrow();
  void updateCPDataWide();
  template <int W>
  void _issuePrimitiveNarrow();
  template <int W>
  void _issuePrimitive();
  virtual void issuePrimitive();
  void duplicate(ColumnCommand*);
  void fillInPrimitiveMessageHeader(const int8_t outputType, const bool absRids);
  template <typename T>
  void createColumnFilter();

  // we only care about the width and type fields.
  // On the PM the rest is uninitialized
  execplan::CalpontSystemCatalog::ColType colType;

  ColumnCommand(const ColumnCommand&);
  ColumnCommand& operator=(const ColumnCommand&);

  void _execute();
  void processResult();
  template <int W>
  void _process_OT_BOTH();
  template <int W>
  void _process_OT_BOTH_wAbsRids();
  virtual void process_OT_BOTH();
  void process_OT_RID();
  virtual void process_OT_DATAVALUE();
  template <int W>
  void _process_OT_DATAVALUE();
  void process_OT_ROWGROUP();
  void projectResult();
  template <typename T>
  void _projectResultRGLoop(rowgroup::Row& r, const T* valuesArray, const uint32_t offset);
  template <int W>
  void _projectResultRG(rowgroup::RowGroup& rg, uint32_t pos);
  virtual void projectResultRG(rowgroup::RowGroup& rg, uint32_t pos);
  void removeRowsFromRowGroup(rowgroup::RowGroup&);
  void makeScanMsg();
  void makeStepMsg();
  void setLBID(uint64_t rid);
  template <typename T>
  inline void fillEmptyBlock(uint8_t* dst, const uint8_t* emptyValue, const uint32_t number) const;

  bool _isScan;

  std::unique_ptr<uint8_t[], utils::AlignedDeleter> inputMsg;
  NewColRequestHeader* primMsg;
  ColResultHeader* outMsg;

  // the length of base prim msg, which is everything up to the
  // rid array for the pCol message
  // !!! This attribute is used to store a sum which arg type is potentially uint64_t.
  // As of 23.02.10 uint32_t here is always enough for the purpose of this attribute though.
  uint32_t baseMsgLength;

  uint64_t lbid;
  bool hasAuxCol_;
  uint64_t lbidAux;
  uint32_t traceFlags;  // probably move this to Command
  uint8_t BOP;
  messageqcpp::ByteStream filterString;
  uint16_t filterCount;
  bool makeAbsRids;
  int64_t* values;  // this is usually bpp->values; RTSCommand needs to use a different container
  int128_t* wide128Values;

  uint16_t mask, shift;  // vars for the selective block loader

  // counters to decide whether to prefetch or not
  uint32_t blockCount, loadCount;

  boost::shared_ptr<primitives::ParsedColumnFilter> parsedColumnFilter;

  /* OR hacks */
  boost::shared_ptr<primitives::ParsedColumnFilter> emptyFilter;
  bool suppressFilter;

  std::vector<uint64_t> lastLbid;

  /* speculative optimizations for projectintorowgroup() */
  rowgroup::Row r;
  uint32_t rowSize;

  bool wasVersioned;

  friend class RTSCommand;
};

using ColumnCommandUniquePtr = std::unique_ptr<ColumnCommand>;

class ColumnCommandInt8 : public ColumnCommand
{
 public:
  static constexpr uint8_t size = 1;
  using IntegralType = datatypes::WidthToSIntegralType<size>::type;
  ColumnCommandInt8() : ColumnCommand(){};
  ColumnCommandInt8(execplan::CalpontSystemCatalog::ColType& colType, messageqcpp::ByteStream& bs);
  void prep(int8_t outputType, bool absRids) override;
  void loadData() override;
  void process_OT_BOTH() override;
  void process_OT_DATAVALUE() override;
  void projectResultRG(rowgroup::RowGroup& rg, uint32_t pos) override;
  void issuePrimitive() override;
};

class ColumnCommandInt16 : public ColumnCommand
{
 public:
  static constexpr uint8_t size = 2;
  using IntegralType = datatypes::WidthToSIntegralType<size>::type;
  ColumnCommandInt16() : ColumnCommand(){};
  ColumnCommandInt16(execplan::CalpontSystemCatalog::ColType& colType, messageqcpp::ByteStream& bs);
  void prep(int8_t outputType, bool absRids) override;
  void loadData() override;
  void process_OT_BOTH() override;
  void process_OT_DATAVALUE() override;
  void projectResultRG(rowgroup::RowGroup& rg, uint32_t pos) override;
  void issuePrimitive() override;
};

class ColumnCommandInt32 : public ColumnCommand
{
 public:
  static constexpr uint8_t size = 4;
  using IntegralType = datatypes::WidthToSIntegralType<size>::type;
  ColumnCommandInt32() : ColumnCommand(){};
  ColumnCommandInt32(execplan::CalpontSystemCatalog::ColType& colType, messageqcpp::ByteStream& bs);
  void prep(int8_t outputType, bool absRids) override;
  void loadData() override;
  void process_OT_BOTH() override;
  void process_OT_DATAVALUE() override;
  void projectResultRG(rowgroup::RowGroup& rg, uint32_t pos) override;
  void issuePrimitive() override;
};

class ColumnCommandInt64 : public ColumnCommand
{
 public:
  static constexpr uint8_t size = 8;
  using IntegralType = datatypes::WidthToSIntegralType<size>::type;
  ColumnCommandInt64() : ColumnCommand(){};
  ColumnCommandInt64(execplan::CalpontSystemCatalog::ColType& colType, messageqcpp::ByteStream& bs);
  void prep(int8_t outputType, bool absRids) override;
  void loadData() override;
  void process_OT_BOTH() override;
  void process_OT_DATAVALUE() override;
  void projectResultRG(rowgroup::RowGroup& rg, uint32_t pos) override;
  void issuePrimitive() override;
};

class ColumnCommandInt128 : public ColumnCommand
{
 public:
  static constexpr uint8_t size = 16;
  using IntegralType = datatypes::WidthToSIntegralType<size>::type;
  ColumnCommandInt128() : ColumnCommand(){};
  ColumnCommandInt128(execplan::CalpontSystemCatalog::ColType& colType, messageqcpp::ByteStream& bs);
  void prep(int8_t outputType, bool absRids) override;
  void loadData() override;
  void process_OT_BOTH() override;
  void process_OT_DATAVALUE() override;
  void projectResultRG(rowgroup::RowGroup& rg, uint32_t pos) override;
  void issuePrimitive() override;
};

class ColumnCommandFabric
{
 public:
  ColumnCommandFabric() = default;
  static ColumnCommand* createCommand(messageqcpp::ByteStream& bs);
  static ColumnCommand* duplicate(const ColumnCommandUniquePtr& rhs);
};

template <typename T>
inline void ColumnCommand::fillEmptyBlock(uint8_t* dst, const uint8_t* emptyValue,
                                          const uint32_t number) const
{
  T* typedDst = reinterpret_cast<T*>(dst);
  const T* typedEmptyValue = reinterpret_cast<const T*>(emptyValue);
  for (uint32_t idx = 0; idx < number; idx = idx + 4)
  {
    typedDst[idx] = *typedEmptyValue;
    typedDst[idx + 1] = *typedEmptyValue;
    typedDst[idx + 2] = *typedEmptyValue;
    typedDst[idx + 3] = *typedEmptyValue;
  }
}

template <>
inline void ColumnCommand::fillEmptyBlock<messageqcpp::ByteStream::hexbyte>(uint8_t* dst,
                                                                            const uint8_t* emptyValue,
                                                                            const uint32_t number) const
{
  for (uint32_t idx = 0; idx < number; idx++)
  {
    datatypes::TSInt128::assignPtrPtr(dst + idx * sizeof(messageqcpp::ByteStream::hexbyte), emptyValue);
  }
}

}  // namespace primitiveprocessor