/* Copyright (C) 2014 InfiniDB, Inc.
 * Copyright (C) 2016 MariaDB Corporation.

   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_splclient.cpp
 *
 *  Created on: Oct 20, 2011
 *      Author: bpaul
 */

#include <cstdio>
#include <iostream>
#include <string>
using namespace std;

#include "errorids.h"
#include "exceptclasses.h"
#include "messagelog.h"
#include "messageobj.h"
#include "loggingid.h"
using namespace logging;

#include <boost/thread/mutex.hpp>
using namespace boost;

#include "messagequeue.h"
#include "bytestream.h"
using namespace messageqcpp;

#include "liboamcpp.h"
using namespace oam;

#include "we_sdhandler.h"
#include "we_splclient.h"

namespace WriteEngine
{
//------------------------------------------------------------------------------
// BP 10/24/2011 14:25
//------------------------------------------------------------------------------
void WESplClientRunner::operator()()
{
  fOwner.sendAndRecv();
}

//------------------------------------------------------------------------------
// BP 10/24/2011 14:25
//------------------------------------------------------------------------------

WESplClient::WESplClient(WESDHandler& Sdh, int PmId)
 : fContinue(true)
 , fConnected(false)
 , fPmId(PmId)
 , fDbrCnt(0)
 , fDbrVar(0)
 , fDataRqstCnt(0)
 , fRdSecTo(0)
 , fRowTx(0)
 , fBytesTx(0)
 , fBytesRcv(0)
 , fLastInTime(0)
 , fStartTime(time(0))
 , fSend(true)
 , fCpiStarted(false)
 , fCpiPassed(false)
 , fCpiFailed(false)
 , fBrmRptRcvd(false)
 , fRollbackRslt(0)
 , fCleanupRslt(0)
 , fServer()
 , fClnt()
 , fpThread(0)
 , fOwner(Sdh)
{
  // TODO ctor
}
//------------------------------------------------------------------------------
WESplClient::~WESplClient()
{
  delete fpThread;
  fpThread = 0;
}
//------------------------------------------------------------------------------
void WESplClient::setup()
{
  // do the setup stuffs here
  if (fOwner.getDebugLvl())
    cout << "setting connection to moduleid " << getPmId() << endl;

  char buff[32];
  snprintf(buff, sizeof(buff), "pm%u_WriteEngineServer", getPmId());
  fServer = buff;

  fClnt.reset(new MessageQueueClient(fServer));

  if (fOwner.getDebugLvl())
    cout << "WEServer : " << fServer << " " << fClnt->addr2String() << endl;

  try
  {
    if (fClnt->connect())
    {
      onConnect();
      startClientThread();
    }
    else
    {
      throw runtime_error("Connection refused");
    }
  }
  catch (std::exception& ex)
  {
    cerr << "Could not connect to " << fServer << ": " << ex.what() << endl;
    throw runtime_error("Problem in connecting to PM");
  }
  catch (...)
  {
    cerr << "Could not connect to " << fServer << endl;
    throw runtime_error("Problem in connecting to PM");
  }
}
//------------------------------------------------------------------------------
void WESplClient::startClientThread()
{
  this->fpThread = new boost::thread(WESplClientRunner(*this));
}
//------------------------------------------------------------------------------
void WESplClient::sendAndRecv()
{
  while (fContinue)
  {
    try
    {
      // Send messages if out queue has something
      send();
      // Recv messages if there is something in socket or timeout
      recv();
    }
    catch (runtime_error&)
    {
      // setCpiFailed(true); - done in onDisconnect() BUG
      setConnected(false);

      if (fOwner.getDebugLvl())
        cout << "Disconnect from PM - " << getPmId() << endl;

      onDisconnect();
    }
  }

  if (this->fCpiFailed)
  {
    // NOTE : commented out to avoid sending rollback twice.
    // fOwner.onCpimportFail(this->getPmId());
    char aDefCon[16], aRedCol[16];
    snprintf(aDefCon, sizeof(aDefCon), "\033[0m");
    snprintf(aRedCol, sizeof(aRedCol), "\033[0;31m");

    if (fOwner.getDebugLvl())
      cout << aRedCol << "Bulk load FAILED on PM " << getPmId() << aDefCon << endl;
  }
  else if (this->fCpiPassed)
  {
    // if(fOwner.getDebugLvl())
    // BUG 4195
    char aDefCon[16], aGreenCol[16];
    snprintf(aDefCon, sizeof(aDefCon), "\033[0m");
    snprintf(aGreenCol, sizeof(aGreenCol), "\033[0;32m");

    if (fOwner.getDebugLvl())
      cout << aGreenCol << "Bulk load Finished Successfully on PM " << getPmId() << aDefCon << endl;
  }
  else if (!this->fCpiStarted)
  {
    if (fOwner.getDebugLvl())
      cout << "Cpimport Failed to Start!!!" << this->getPmId() << endl;
  }
}
//------------------------------------------------------------------------------
void WESplClient::send()
{
  if ((!fSendQueue.empty()) && (getDataRqstCount() > 0))
  {
    if (fOwner.getDebugLvl() > 2)
      cout << "DataRqstCnt [" << getPmId() << "] = " << getDataRqstCount() << endl;

    boost::mutex::scoped_lock aLock(fSentQMutex);
    messageqcpp::SBS aSbs = fSendQueue.front();
    fSendQueue.pop();
    aLock.unlock();
    int aLen = (*aSbs).length();

    if (aLen > 0)
    {
      boost::mutex::scoped_lock aLock(fWriteMutex);
      setBytesTx(getBytesTx() + aLen);

      try
      {
        if (isConnected())
          fClnt->write(aSbs);
      }
      catch (...)
      {
      }

      aLock.unlock();
    }

    decDataRqstCount();
    // decDbRootVar();
  }

  // setSendFlag(fOwner.check4Ack(fPmId));
}
//------------------------------------------------------------------------------
void WESplClient::recv()
{
  messageqcpp::SBS aSbs;
  struct timespec rm_ts;
  rm_ts.tv_sec = fRdSecTo;   // 0 when data sending otherwise 1- second
  rm_ts.tv_nsec = 20000000;  // 20 milliSec
  bool isTimeOut = false;
  int aLen = 0;

  try
  {
    if (isConnected())
      aSbs = fClnt->read(&rm_ts, &isTimeOut);
  }
  catch (std::exception& ex)
  {
    setConnected(false);
    cout << ex.what() << endl;
    cout << "fClnt read error on " << getPmId() << endl;
    throw runtime_error("fClnt read error");
  }

  // - aSbs->length()>0 add to the sdh.fWesMsgQueue
  try
  {
    if (aSbs)
      aLen = aSbs->length();
  }
  catch (...)
  {
    aLen = 0;
  }

  if (aLen > 0)
  {
    setLastInTime(time(0));  // added back for BUG 4535 / BUG 4195
    setBytesRcv(getBytesRcv() + aLen);
    fOwner.add2RespQueue(aSbs);
  }
  else if ((aLen <= 0) && (!isTimeOut))  // disconnect
  {
    cout << "Disconnect from PM - " << getPmId() << " IP " << endl;
    onDisconnect();
  }
}
//------------------------------------------------------------------------------
void WESplClient::write(const messageqcpp::ByteStream& Msg)
{
  setBytesTx(getBytesTx() + Msg.length());

  try
  {
    if (Msg.length() > 0)
      fClnt->write(Msg);
  }
  catch (...)
  {
    // ignore it
  }
}
//------------------------------------------------------------------------------
void WESplClient::read(messageqcpp::SBS& Sbs)
{
  // read from the WEServerMsgQueue
  // if Key is needed give that constant here
}
//------------------------------------------------------------------------------
// TODO - We may need to make it much more efficient by incorporating file read
void WESplClient::add2SendQueue(const messageqcpp::SBS& Sbs)
{
  this->fSendQueue.push(Sbs);
}

void WESplClient::clearSendQueue()
{
  boost::mutex::scoped_lock aLock(fSentQMutex);

  while (!fSendQueue.empty())
    fSendQueue.pop();

  aLock.unlock();
}

int WESplClient::getSendQSize()
{
  int aQSize = 0;
  boost::mutex::scoped_lock aLock(fSentQMutex);
  aQSize = fSendQueue.size();
  aLock.unlock();
  return aQSize;
}

//------------------------------------------------------------------------------
void WESplClient::printStats()
{
  if (fOwner.getDebugLvl())
  {
    cout << "\tPMid      \t" << getPmId() << endl;
    cout << "\tTx Rows   \t" << getRowTx() << endl;
    // if(fOwner.getDebugLvl())
    cout << "\tTx Bytes  \t" << getBytesTx() << endl;
    // if(fOwner.getDebugLvl())
    cout << "\tRcv Bytes \t" << getBytesRcv() << endl;
    cout << "\tInserted/Read Rows   " << fRowsUploadInfo.fRowsInserted << "/" << fRowsUploadInfo.fRowsRead
         << endl;

    if (fColOorVec.size() > 0)
      cout << "\tCol Id\tColName\t\t\tout-of-range count" << endl;

    WEColOorVec::iterator aIt = fColOorVec.begin();

    while (aIt != fColOorVec.end())
    {
      cout << "\t" << (*aIt).fColNum << "\t" << (*aIt).fColName << "\t\t" << (*aIt).fNoOfOORs << endl;
      aIt++;
    }

    if (!fBadDataFile.empty())
      cout << "\tBad Data Filename    " << fBadDataFile << endl;

    if (!fErrInfoFile.empty())
      cout << "\tError Filename       " << fErrInfoFile << endl;

    cout << "\t(" << getLastInTime() - getStartTime() << "sec)" << endl;
    cout << "\t" << endl;
  }
}
//------------------------------------------------------------------------------

void WESplClient::onConnect()
{
  // TODO
  // update all the flags on Connect.
  // alert data can be send now
  // do not allow to connect back again.

  // when reconnect happens, reset the variables
  setRollbackRslt(0);
  setCleanupRslt(0);
  setCpiPassed(false);
  setCpiFailed(false);

  setContinue(true);
  setConnected(true);
  ByteStream bsWrite;
  bsWrite << (ByteStream::byte)WE_CLT_SRV_KEEPALIVE;

  try
  {
    this->write(bsWrite);  // send the keep init keep alive
  }
  catch (...)
  {
  }

  // need to send Alarm
  fIpAddress = fClnt->addr2String();
}
//------------------------------------------------------------------------------
void WESplClient::onDisconnect()
{
  // TODO
  // - set fContinue to false  - set the thread free
  setContinue(false);
  setConnected(false);
  setRollbackRslt(-1);
  setCleanupRslt(-1);

  if ((!fCpiPassed) && (!fCpiFailed))  // a hard disconnection
  {
    fOwner.onCpimportFail(fPmId);
    fOwner.setDisconnectFailure(true);
  }

  // update all the flags of disconnect.
  // alert on roll back
  // do not allow to connect back again.

  try
  {
    // BT Should log this probably instead
    // ALARMManager alarmMgr;
    // std::string alarmItem = sin_addr2String(fClnt->serv_addr().sin_addr);
    std::string alarmItem = fClnt->addr2String();
    alarmItem.append(" WriteEngineServer");
    // alarmMgr.sendAlarmReport(alarmItem.c_str(), oam::CONN_FAILURE, SET);
  }
  catch (...)
  {
    // just ignore it for time being.
  }
}

//------------------------------------------------------------------------------

void WESplClient::setRowsUploadInfo(int64_t RowsRead, int64_t RowsInserted)
{
  fRowsUploadInfo.fRowsRead = RowsRead;
  fRowsUploadInfo.fRowsInserted = RowsInserted;
}

//------------------------------------------------------------------------------

void WESplClient::add2ColOutOfRangeInfo(int ColNum, execplan::CalpontSystemCatalog::ColDataType ColType,
                                        std::string& ColName, int NoOfOors)
{
  WEColOORInfo aColOorInfo;
  aColOorInfo.fColNum = ColNum;
  aColOorInfo.fColType = ColType;
  aColOorInfo.fColName = ColName;
  aColOorInfo.fNoOfOORs = NoOfOors;
  fColOorVec.push_back(aColOorInfo);
}

//------------------------------------------------------------------------------

void WESplClient::setBadDataFile(const std::string& BadDataFile)
{
  fBadDataFile = BadDataFile;
}

//------------------------------------------------------------------------------

void WESplClient::setErrInfoFile(const std::string& ErrInfoFile)
{
  fErrInfoFile = ErrInfoFile;
}

//------------------------------------------------------------------------------

} /* namespace WriteEngine */
