/* 
$Id$ 
*/

// This class runs the test TOF preprocessor
// It uses AliTestShuttle to simulate a full Shuttle process

// The input data is created in the functions
//   CreateDCSAliasMap() creates input that would in the same way come from DCS
//   ReadDCSAliasMap() reads from a file
//   CreateInputFilesMap() creates a list of local files, that can be accessed by the shuttle

extern TBenchmark *gBenchmark;
void TOFPreprocessorFDR()
{
  gSystem->Load("$ALICE/SHUTTLE/TestShuttle/libTestShuttle.so");

  AliLog::SetClassDebugLevel("AliTOFPreprocessorFDR",1);
  // initialize location of CDB
  AliTestShuttle::SetMainCDB("local://$ALICE_ROOT/OCDB/SHUTTLE/TestShuttle/TestCDB");
  AliTestShuttle::SetMainRefStorage("local://$ALICE_ROOT/OCDB/SHUTTLE/TestShuttle/TestReference");

  // create AliTestShuttle instance
  AliTestShuttle* shuttle = new AliTestShuttle(0, 0, 1000);

  // Generation of "fake" input DCS data
  TMap* dcsAliasMap = CreateDCSAliasMap();  

  // now give the alias map to the shuttle
  shuttle->SetDCSInput(dcsAliasMap);   

  // instantiation of the preprocessor
  AliPreprocessor* pp = new AliTOFPreprocessorFDR(shuttle);

  // preprocessing
  gBenchmark->Start("process");
  shuttle->Process();
  gBenchmark->Stop("process");
  gBenchmark->Print("process");

  // checking the file which should have been created  
  AliCDBEntry* chkEntry = AliCDBManager::Instance()->GetStorage(AliShuttleInterface::GetMainCDB())->Get("TOF/Calib/DCSData", 0);
  if (!chkEntry)
  {
    printf("The file is not there. Something went wrong.\n");
    return;
  }

  AliTOFDataDCS* output = dynamic_cast<AliTOFDataDCS*> (chkEntry->GetObject());
  // If everything went fine, draw the result
  if (output)
    printf("Output found.\n");
  //    output->Draw();
  
}

TMap* CreateDCSAliasMap()
{
  // Creates a DCS structure
  // The structure is the following:
  //   TMap (key --> value)
  //     <DCSAlias> --> <valueList>
  //     <DCSAlias> is a string
  //     <valueList> is a TObjArray of AliDCSValue
  //     An AliDCSValue consists of timestamp and a value in form of a AliSimpleValue

  // In this example 6 aliases exists: DCSAlias1 ... DCSAlias6
  // Each contains 1000 values randomly generated by TRandom::Gaus + 5*nAlias

  TMap* aliasMap = new TMap;
  aliasMap->SetOwner(1);

  TRandom random;
  TDatime *datime = new TDatime();
  Int_t time = datime->GetTime();
  Int_t date = datime->GetDate();
  Int_t pid  = gSystem->GetPid();
  delete datime;
  Int_t iseed = TMath::Abs(10000 * pid + time - date); 

  Float_t tentLVv33=3.3, tentLVv48=48, tentLVi33=100, tentLVi48=10;
  Float_t sigmaLVv33=0.1, sigmaLVv48=1, sigmaLVi33=10, sigmaLVi48=2;

  Float_t tent=0, sigma=0, thr=0;
  Int_t NAliases=4;

  for(int nAlias=0;nAlias<NAliases;nAlias++) {
    
    TObjArray* valueSet = new TObjArray;
    valueSet->SetOwner(1);
    
    TString sindex;
    TString aliasName;
    if (nAlias==0){
      aliasName = "tof_lv_i48_02";
      tent=tentLVi48;
      sigma=sigmaLVi48;
    }
    else if (nAlias==1){
      aliasName = "tof_lv_v48_02";
      tent=tentLVv48;
      sigma=sigmaLVv48;
    }
    else if (nAlias==2){
      aliasName = "tof_lv_i33_02";
      tent=tentLVi33;
      sigma=sigmaLVi33;
    }
    else if (nAlias==3){
      aliasName = "tof_lv_v33_02";
      tent=tentLVv33;
      sigma=sigmaLVv33;
    }
    
    // gauss generation of values 
    for (int timeStamp=0;timeStamp<1000;timeStamp+=10){
      Float_t gaussvalue = (Float_t) (random.Gaus(tent,sigma));
      if (TMath::Abs(gaussvalue-tent)>sigma){
	AliDCSValue* dcsVal = new AliDCSValue(gaussvalue, timeStamp);
	valueSet->Add(dcsVal);
      }
    }
    
    aliasMap->Add(new TObjString(aliasName), valueSet);
  }
  return aliasMap;

}

TMap* ReadDCSAliasMap()
{
  // Open a file that contains DCS input data
  // The CDB framework is used to open the file, this means the file is located
  // in $ALICE_ROOT/SHUTTLE/TestShuttle/TestCDB/<detector>/DCS/Data
  // The file contains an AliCDBEntry that contains a TMap with the DCS structure.
  // An explanation of the structure can be found in CreateDCSAliasMap()

  AliCDBEntry *entry = AliCDBManager::Instance()->Get("TOF/DCS/Data", 0);
  return dynamic_cast<TMap*> (entry->GetObject());
}

void WriteDCSAliasMap()
{
  // This writes the output from CreateDCSAliasMap to a CDB file

  TMap* dcsAliasMap = CreateDCSAliasMap();

  AliCDBMetaData metaData;
	metaData.SetBeamPeriod(0);
	metaData.SetResponsible("Chiara");
	metaData.SetComment("Test object for TOFPreprocessorDCS.C");

  AliCDBId id("TOF/DCS/Data", 0, 0);

  // initialize location of CDB
  AliCDBManager::Instance()->SetDefaultStorage("local://$ALICE_ROOT/OCDB/SHUTTLE/TestShuttle/TestCDB");

  AliCDBManager::Instance()->Put(dcsAliasMap, id, &metaData);
}