/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_6_2_7/src/OnlineDB/EcalCondDB/src/ODLTCConfig.cc

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#include <fstream>
#include <iostream>
#include <stdio.h>
#include <stdexcept>
#include <string>
#include "OnlineDB/Oracle/interface/Oracle.h"

#include "OnlineDB/EcalCondDB/interface/ODLTCConfig.h"

using namespace std;
using namespace oracle::occi;

ODLTCConfig::ODLTCConfig()
{
  m_env = NULL;
  m_conn = NULL;
  m_writeStmt = NULL;
  m_readStmt = NULL;
  m_config_tag="";
  m_size=0;

   m_ID=0;
   clear();

}



ODLTCConfig::~ODLTCConfig()
{
  //  delete [] m_ltc_clob;
}

int ODLTCConfig::fetchNextId()  throw(std::runtime_error) {

  int result=0;
  try {
    this->checkConnection();

    m_readStmt = m_conn->createStatement(); 
    m_readStmt->setSQL("select ecal_ltc_config_sq.NextVal from dual");
    ResultSet* rset = m_readStmt->executeQuery();
    while (rset->next ()){
      result= rset->getInt(1);
    }
    m_conn->terminateStatement(m_readStmt);
    return result; 

  } catch (SQLException &e) {
    throw(std::runtime_error("ODLTCConfig::fetchNextId():  "+e.getMessage()));
  }

}




void ODLTCConfig::prepareWrite()
  throw(std::runtime_error)
{
  this->checkConnection();

  int next_id=fetchNextId();

  try {
    m_writeStmt = m_conn->createStatement();
    m_writeStmt->setSQL("INSERT INTO ECAL_LTC_CONFIGURATION (ltc_configuration_id, ltc_tag, "
                        " LTC_CONFIGURATION_file, " 
                        " Configuration ) "
                        "VALUES (:1, :2, :3, :4 )");
    m_writeStmt->setInt(1, next_id);
    m_writeStmt->setString(2, this->getConfigTag());
    m_writeStmt->setString(3, getLTCConfigurationFile());
   
    
    // and now the clob
    oracle::occi::Clob clob(m_conn);
    clob.setEmpty();
    m_writeStmt->setClob(4,clob);
    m_writeStmt->executeUpdate ();
    m_ID=next_id; 

    m_conn->terminateStatement(m_writeStmt);
    std::cout<<"LTC Clob inserted into CONFIGURATION with id="<<next_id<<std::endl;

    // now we read and update it 
    m_writeStmt = m_conn->createStatement(); 
    m_writeStmt->setSQL ("SELECT Configuration FROM ECAL_LTC_CONFIGURATION WHERE"
                         " ltc_configuration_id=:1 FOR UPDATE");

    std::cout<<"updating the clob 0"<<std::endl;

    
  } catch (SQLException &e) {
    throw(std::runtime_error("ODLTCConfig::prepareWrite():  "+e.getMessage()));
  }

  std::cout<<"updating the clob 1 "<<std::endl;
  
}

void ODLTCConfig::setParameters(std::map<string,string> my_keys_map){

  // parses the result of the XML parser that is a map of
  // string string with variable name variable value

  for( std::map<std::string, std::string >::iterator ci=
         my_keys_map.begin(); ci!=my_keys_map.end(); ci++ ) {

    if(ci->first==  "LTC_CONFIGURATION_ID") setConfigTag(ci->second);
    if(ci->first==  "Configuration") {
      std::string fname=ci->second ;
      string  str3;
      size_t pos, pose;

      pos = fname.find("=");    // position of "live" in str
      pose = fname.size();    // position of "]" in str
      str3 = fname.substr (pos+1, pose-pos-2);   

      cout << "fname="<<fname<< " and reduced is: "<<str3 << endl;
      setLTCConfigurationFile(str3 );


      // here we must open the file and read the LTC Clob
      std::cout << "Going to read LTC file: " << fname << endl;

      ifstream inpFile;
      inpFile.open(str3.c_str());

      // tell me size of file 
      int bufsize = 0; 
      inpFile.seekg( 0,ios::end ); 
      bufsize = inpFile.tellg(); 
      std::cout <<" bufsize ="<<bufsize<< std::endl;
      // set file pointer to start again 
      inpFile.seekg( 0,ios::beg ); 

      m_size=bufsize;

      inpFile.close();
      
    }
  }

}


void ODLTCConfig::writeDB()
  throw(std::runtime_error)
{

  std::cout<<"updating the clob "<<std::endl;



  try {

 
    m_writeStmt->setInt(1, m_ID);
    ResultSet* rset = m_writeStmt->executeQuery();

    rset->next ();
    oracle::occi::Clob clob = rset->getClob (1);

    cout << "Opening the clob in read write mode" << endl;

    std::cout << "Populating the clob" << endl;
    
    populateClob (clob, getLTCConfigurationFile(), m_size);
    int clobLength=clob.length ();
    cout << "Length of the clob is: " << clobLength << endl;
    // clob.close ();

    m_writeStmt->executeUpdate();

    m_writeStmt->closeResultSet (rset);

  } catch (SQLException &e) {
    throw(std::runtime_error("ODLTCConfig::writeDB():  "+e.getMessage()));
  }
  // Now get the ID
  if (!this->fetchID()) {
    throw(std::runtime_error("ODLTCConfig::writeDB:  Failed to write"));
  }


}


void ODLTCConfig::clear(){
  //  strcpy((char *)m_ltc_clob, "");

   m_ltc_file="";

}



void ODLTCConfig::fetchData(ODLTCConfig * result)
  throw(std::runtime_error)
{
  this->checkConnection();
  result->clear();
  if(result->getId()==0 && result->getConfigTag()==""){
    throw(std::runtime_error("ODLTCConfig::fetchData(): no Id defined for this ODLTCConfig "));
  }

  try {

    m_readStmt->setSQL("SELECT *   "
                       "FROM ECAL_LTC_CONFIGURATION  "
                       " where (ltc_configuration_id = :1  or LTC_tag=:2 )" );
    m_readStmt->setInt(1, result->getId());
    m_readStmt->setString(2, result->getConfigTag());
    ResultSet* rset = m_readStmt->executeQuery();

    rset->next();
    // 1 is the id and 2 is the config tag

    result->setId(rset->getInt(1));
    result->setConfigTag(rset->getString(2));
    result->setLTCConfigurationFile(rset->getString(3));
  

    Clob clob = rset->getClob (4);
    cout << "Opening the clob in Read only mode" << endl;
    clob.open (OCCI_LOB_READONLY);
    int clobLength=clob.length ();
    cout << "Length of the clob is: " << clobLength << endl;
    m_size=clobLength;
    unsigned char* buffer = readClob (clob, clobLength);
    clob.close ();
    cout<< "the clob buffer is:"<<endl;  
    for (int i = 0; i < clobLength; ++i)
      cout << (char) buffer[i];
    cout << endl;


    result->setLTCClob(buffer );

  } catch (SQLException &e) {
    throw(std::runtime_error("ODLTCConfig::fetchData():  "+e.getMessage()));
  }
}



int ODLTCConfig::fetchID()    throw(std::runtime_error)
{
  if (m_ID!=0) {
    return m_ID;
  }

  this->checkConnection();

  try {
    Statement* stmt = m_conn->createStatement();
    stmt->setSQL("SELECT ltc_configuration_id FROM ecal_ltc_configuration "
                 "WHERE  ltc_tag=:ltc_tag "
                 );

    stmt->setString(1, getConfigTag() );

    ResultSet* rset = stmt->executeQuery();

    if (rset->next()) {
      m_ID = rset->getInt(1);
    } else {
      m_ID = 0;
    }
    m_conn->terminateStatement(stmt);
  } catch (SQLException &e) {
    throw(std::runtime_error("ODLTCConfig::fetchID:  "+e.getMessage()));
  }

  return m_ID;
}