/* 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. */

#pragma once
// $Id: iomanager.h 2145 2013-08-09 22:38:19Z wweeks $
//
// C++ Interface: iomanager
//
// Description:
//
//
// Author: Jason Rodriguez <jrodriguez@calpont.com>
//
//
//

/**
        @author Jason Rodriguez <jrodriguez@calpont.com>
*/

#include <iostream>
#include <iomanip>
#include <string>
#include <boost/thread.hpp>
#include "writeengine.h"
#include "configcpp.h"
#include "brm.h"
#include "fileblockrequestqueue.h"
#include "filebuffermgr.h"

//#define SHARED_NOTHING_DEMO_2

namespace dbbc
{
class ioManager
{
 public:
  ioManager(FileBufferMgr& fbm, fileBlockRequestQueue& fbrq, int thrCount, int bsPerRead);
  // ioManager(FileBufferMgr& fbm, int thrCount);
  ~ioManager();
  int readerCount() const
  {
    return fThreadCount;
  }
  fileRequest* getNextRequest();
  void go(void);
  void stop();
  FileBufferMgr& fileBufferManager()
  {
    return fIOMfbMgr;
  }
  config::Config* configPtr()
  {
    return fConfig;
  }

  int localLbidLookup(BRM::LBID_t lbid, BRM::VER_t verid, bool vbFlag, BRM::OID_t& oid, uint16_t& dbRoot,
                      uint32_t& partitionNum, uint16_t& segmentNum, uint32_t& fileBlockOffset);

  void buildOidFileName(const BRM::OID_t oid, uint16_t dbRoot, const uint32_t partNum, const uint16_t segNum,
                        char* file_name);

  uint32_t getExtentRows()
  {
    return fdbrm.getExtentRows();
  }

  uint32_t blocksPerRead;

  bool IOTrace() const
  {
    return fIOTrace;
  }

  uint32_t MaxOpenFiles() const
  {
    return fMaxOpenFiles;
  }

  uint32_t DecreaseOpenFilesCount() const
  {
    return fDecreaseOpenFilesCount;
  }

  bool FDCacheTrace() const
  {
    return fFDCacheTrace;
  }

  void handleBlockReadError(fileRequest* fr, const std::string& errMsg, bool* copyLocked,
                            int errorCode = fileRequest::FAILED);

  std::ofstream& FDTraceFile()
  {
    return fFDTraceFile;
  }

  BRM::DBRM* dbrm()
  {
    return &fdbrm;
  }

#ifdef SHARED_NOTHING_DEMO_2
  uint32_t pmCount;
#endif

 private:
  FileBufferMgr& fIOMfbMgr;
  fileBlockRequestQueue& fIOMRequestQueue;
  int fThreadCount;
  boost::thread_group fThreadArr;
  void createReaders();
  config::Config* fConfig;
  BRM::DBRM fdbrm;
  WriteEngine::FileOp fFileOp;

  // do not implement
  ioManager();
  ioManager(const ioManager& iom);
  const ioManager& operator=(const ioManager& iom);
  bool fIOTrace;
  uint32_t fMaxOpenFiles;
  uint32_t fDecreaseOpenFilesCount;
  bool fFDCacheTrace;
  std::ofstream fFDTraceFile;
};

// @bug2631, for remount filesystem by loadBlock() in primitiveserver
// Shared Nothing update: Remount is no longer necessary, might have a use for these though.
void setReadLock();
void releaseReadLock();
void dropFDCache();
void purgeFDCache(std::vector<BRM::FileInfo>& files);

}  // namespace dbbc