/* 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: we_colopcompress.cpp 4726 2013-08-07 03:38:36Z bwilkinson $

/** @file */

#include <stdio.h>
#include <string.h>
#include <vector>

#include "we_log.h"
#include "we_chunkmanager.h"
#include "idbcompress.h"

#include "we_colopcompress.h"

namespace WriteEngine
{
class ChunkManager;

// --------------------------------------------------------------------------------------------
// ColumnOp with compression type 0
// --------------------------------------------------------------------------------------------

/**
 * Constructor
 */
ColumnOpCompress0::ColumnOpCompress0()
{
  m_compressionType = 0;
}

ColumnOpCompress0::ColumnOpCompress0(Log* logger)
{
  m_compressionType = 0;
  setDebugLevel(logger->getDebugLevel());
  setLogger(logger);
}

/**
 * Default Destructor
 */
ColumnOpCompress0::~ColumnOpCompress0()
{
}

// @bug 5572 - HDFS usage: add *.tmp file backup flag
IDBDataFile* ColumnOpCompress0::openFile(const Column& column, const uint16_t dbRoot,
                                         const uint32_t partition, const uint16_t segment,
                                         std::string& segFile, bool useTmpSuffix, const char* mode,
                                         const int ioBuffSize, bool isReadOnly) const
{
  return FileOp::openFile(column.dataFile.fid, dbRoot, partition, segment, segFile, mode, column.colWidth,
                          useTmpSuffix);
}

bool ColumnOpCompress0::abbreviatedExtent(IDBDataFile* pFile, int colWidth) const
{
  long long fsize;

  if (getFileSize(pFile, fsize) == NO_ERROR)
  {
    return (fsize == INITIAL_EXTENT_ROWS_TO_DISK * colWidth);
  }

  // TODO: Log error
  return false;
}

int ColumnOpCompress0::blocksInFile(IDBDataFile* pFile) const
{
  long long fsize;

  if (getFileSize(pFile, fsize) == NO_ERROR)
  {
    return (fsize / BYTE_PER_BLOCK);
  }

  // TODO: Log error
  return 0;
}

int ColumnOpCompress0::readBlock(IDBDataFile* pFile, unsigned char* readBuf,
                                 const uint64_t fbo)
{
  return readDBFile(pFile, readBuf, fbo, true);
}

int ColumnOpCompress0::saveBlock(IDBDataFile* pFile, const unsigned char* writeBuf, const uint64_t fbo)
{
  return writeDBFileFbo(pFile, writeBuf, fbo, 1);
}

// --------------------------------------------------------------------------------------------
// ColumnOp with compression type 1
// --------------------------------------------------------------------------------------------
// --------------------------------------------------------------------------------------------

/**
 * Constructor
 */

ColumnOpCompress1::ColumnOpCompress1(uint32_t compressionType, Log* logger)
{
  m_compressionType = compressionType;
  m_chunkManager = new ChunkManager();

  if (logger)
  {
    setDebugLevel(logger->getDebugLevel());
    setLogger(logger);
  }

  m_chunkManager->fileOp(this);
}

/**
 * Default Destructor
 */
ColumnOpCompress1::~ColumnOpCompress1()
{
  if (m_chunkManager)
  {
    delete m_chunkManager;
  }
}

// @bug 5572 - HDFS usage: add *.tmp file backup flag
IDBDataFile* ColumnOpCompress1::openFile(const Column& column, const uint16_t dbRoot,
                                         const uint32_t partition, const uint16_t segment,
                                         std::string& segFile, bool useTmpSuffix, const char* mode,
                                         const int ioBuffSize, bool isReadOnly) const
{
  return m_chunkManager->getFilePtr(column, dbRoot, partition, segment, segFile, mode, ioBuffSize,
                                    useTmpSuffix, isReadOnly);
}

bool ColumnOpCompress1::abbreviatedExtent(IDBDataFile* pFile, int colWidth) const
{
  return (blocksInFile(pFile) == INITIAL_EXTENT_ROWS_TO_DISK * colWidth / BYTE_PER_BLOCK);
}

int ColumnOpCompress1::blocksInFile(IDBDataFile* pFile) const
{
  return m_chunkManager->getBlockCount(pFile);
}

int ColumnOpCompress1::readBlock(IDBDataFile* pFile, unsigned char* readBuf,
                                 const uint64_t fbo)
{
  return m_chunkManager->readBlock(pFile, readBuf, fbo);
}

int ColumnOpCompress1::saveBlock(IDBDataFile* pFile, const unsigned char* writeBuf, const uint64_t fbo)
{
  return m_chunkManager->saveBlock(pFile, writeBuf, fbo);
}

int ColumnOpCompress1::flushFile(int rc, std::map<FID, FID>& columnOids)
{
  return m_chunkManager->flushChunks(rc, columnOids);
}

int ColumnOpCompress1::expandAbbrevColumnExtent(IDBDataFile* pFile, uint16_t dbRoot, const uint8_t* emptyVal,
                                                int width,
                                                execplan::CalpontSystemCatalog::ColDataType colDataType)
{
  // update the uncompressed initial chunk to full chunk
  int rc = m_chunkManager->expandAbbrevColumnExtent(pFile, emptyVal, width);

  // ERR_COMP_FILE_NOT_FOUND is acceptable here. It just means that the
  // file hasn't been loaded into the chunk manager yet. No big deal.
  if (rc != NO_ERROR && rc != ERR_COMP_FILE_NOT_FOUND)
  {
    return rc;
  }

  // let the base to physically expand extent.
  return FileOp::expandAbbrevColumnExtent(pFile, dbRoot, emptyVal, width, colDataType);
}

int ColumnOpCompress1::updateColumnExtent(IDBDataFile* pFile, int nBlocks, int64_t lbid)
{
  return m_chunkManager->updateColumnExtent(pFile, nBlocks, lbid);
}

void ColumnOpCompress1::closeColumnFile(Column& column) const
{
  // Leave file closing to chunk manager.
  column.dataFile.pFile = NULL;
}

}  // namespace WriteEngine