/**
 * \file TrkCore.cpp
 * \author Elena Vannuccini
 */
// .........................................................
// ROOT header files
// .........................................................
#include <TTree.h>
#include <TClassEdit.h>
#include <TObject.h>
#include <TList.h>
#include <TSystem.h>
#include <TSystemDirectory.h>
#include <TString.h>
#include <TFile.h>
#include <TClass.h>
#include <TCanvas.h>
#include <TH1.h>
#include <TH1F.h>
#include <TH2D.h>
#include <TLatex.h>
#include <TPad.h>
#include <TSQLServer.h>
#include <TSQLRow.h>
#include <TSQLResult.h>
#include <TBenchmark.h>

// .........................................................
// other general header files
// .........................................................
#include <fstream>
#include <iostream>
// .........................................................
// files in the inc directory
// .........................................................
#include <RunInfo.h>
#include <GLTables.h>
#include <TrkVerl2.h>
#include <TrkProcess.h>
//#include <TrkStruct.h>
#include <TrkLevel2.h> 
#include <TrkLevel1.h> 
#include <TrkLevel0.h> 
#include <TrkHough.h>
// .........................................................
// YODA header files 
// .........................................................
#include <PamelaRun.h>
//#include <RegistryEvent.h>
#include <physics/tracker/TrackerEvent.h>
#include <CalibTrk1Event.h>
#include <CalibTrk2Event.h>

// .........................................................
// namespaces
// .........................................................
using namespace std;
using namespace pamela;
//  ================================================================================
//
//
//  ================================================================================
/**
 * \brief Tracker data reduction routine. 
 *
 * It performs data reduction LEVEL0->LEVEL1->LEVEL2, producing LEVEL1 and or LEVEL2 output, in ROOT or HBOOK format.
 * Input parameters:
 * @param run id of the run to be processed (if run=0 a whole file is reprocessed)
 * @param dbc pointer to BD server
 * @param file1 output LEVEL1 file name (null if no LEVEL1 output is required)
 * @param file2 output LEVEL2 file name (null if no LEVEL2 output is required)
 * @param standalone (flag to run the program in standalone mode, that is without reading RunInfo)
 */
//short int TrkCore(Int_t run, TSQLServer *dbc, TString file1, TString file2, Bool_t standalone)
//int TrkCore(UInt_t run, TFile *f2, TSQLServer *dbc, int ncustom, char*vcustom[])     // EMILIANO
int TrkCore(UInt_t run, TFile *f2, GL_TABLES *glt, int ncustom, char*vcustom[])     // EMILIANO
{
    // ---------------------------
    // Define some basic variables
    // ---------------------------

    TString  filename     = ""; 
    Long64_t nentries = 0LL;
    
    // LEVEL0 input 
    TFile         *f0 = 0;
    TTree         *physicsTree = 0;
    TBranch       *b_trk       = 0;
    TBranch       *b_header    = 0;
    EventHeader   *header  = 0;
    PscuHeader    *pscu    = 0;
    TrkLevel0     *l0_event = new TrkLevel0();
    // RunInfo 
    ItoRunInfo *runinfo = 0;
    TArrayI    *runlist = 0;
    UInt_t      from_run;
    UInt_t      to_run;
    Bool_t      reprocessing = false;
    //LEVEL2 output - ROOT
    TTree     *t_level2 = 0; 
    TTree     *t_clone = 0; 
    TrkLevel2 *l2_event = new TrkLevel2();
    TrkLevel2 *l2_clone = new TrkLevel2();
    //LEVEL1 output - ROOT
    TrkLevel1    *l1_event = new TrkLevel1();
    TrkHough     *lh_event = new TrkHough();
// -----------------------
// -----------------------
// Handle input parameters
// (data)
//
// - open/create output files, determining the environment root/hbook from the estension
// - create the level1/level2 tree+branch/nt-uple
// -----------------------
// -----------------------	
    TrkProcess *p = new TrkProcess(run,f2);
    if( p->HandleCustomPar(ncustom,vcustom) )return(p->ostatus);;
    if( TrkParams::VerboseMode() )p->Dump();

// ===================================
// Open/Create level2 output file
// ===================================
    if(p->get2){
	//-------------------------------------------
	// read RunInfo
	//-------------------------------------------
	if(!(p->standalone)){
	    // Open "RunInfo" tree and get list of run
	    runinfo = new ItoRunInfo(f2);
	    char *trkversion = TrkInfo(false);
	    int runinfo_error = runinfo->Update(run,"TRK",trkversion);
	    if( runinfo_error ) throw runinfo_error;
	    runlist = runinfo->GetRunList();
	    reprocessing = runinfo->IsReprocessing();//????
	    if(TrkParams::VerboseMode()){
		cout << "#events       "<< runinfo->GetFileEntries() << endl;// #events in the file 
		cout << "#runs         "<< runinfo->GetRunEntries()  << endl;// #runs in the file
		cout << "1-st run      "<< runlist->At(0)            << endl;
		cout << "last run      "<< runlist->At(runinfo->GetRunEntries()-1) << endl;
		cout << "1-st event    "<< runinfo->GetFirstEntry()  << endl;// first event of our run
		cout << "last event+1  "<< runinfo->GetLastEntry()   << endl;// first event AFTER the last event of our run
		cout << "reprocessing  "<< runinfo->IsReprocessing() << endl << endl;
	    };
	};
	//-------------------------------------------
	//
	//-------------------------------------------
	// Take (if present) the old Tracker tree
	t_clone = (TTree*)f2->Get("Tracker");
	if( t_clone != NULL ) t_clone->SetBranchAddress("TrkLevel2",&l2_clone);
	// Create NEW Tracker tree			
	t_level2 = new TTree("Tracker","PAMELA tracker level2 data ");
	l2_event->Set(); // ****NBNBNBN*****
	t_level2->Branch("TrkLevel2","TrkLevel2",&l2_event);
	if(p->get1){
	    if(TrkParams::VerboseMode())cout << endl << "Requested LEVEL1 output" << endl;
	    l1_event->Set(); // ****NBNBNBN*****
	    t_level2->Branch("TrkLevel1","TrkLevel1",&l1_event);
	}
	if(p->geth){
	  if(TrkParams::VerboseMode())cout << endl << "Requested Hough-Transform output" << endl;
	  t_level2->Branch("TrkHough","TrkHough",&lh_event);
	};
    };
	

// -------------------------------------------
// define runs to be processed/reprocessed
// -------------------------------------------
    if(run == 0){
	// reprocessing ALL runs
	if(p->standalone)throw -298; // reprocessing not implemented
	from_run = runlist->At(0);
	to_run   = runlist->At(runinfo->GetRunEntries()-1);
    }else{
	// processing/reprocessing ONE single run
	from_run = run;
	to_run   = run;
    };
    
    //
    // init event counter
    //
    Int_t ev_count =0;
    //
    // create query-results objects
    //
    GL_RUN       q1 = GL_RUN();
    GL_TRK_CALIB q2 = GL_TRK_CALIB();
    GL_ROOT      q3 = GL_ROOT();
    GL_PARAM     q4 = GL_PARAM();
	
// ------------------------------------------------------------
//  if reprocessing one run, copy all the events BEFORE the run
// ------------------------------------------------------------
    if( !(p->standalone) ){
	for(UInt_t i=0; i<runinfo->GetFirstEntry(); i++){
	    if ( t_clone->GetEntry(i) <= 0 ) throw -36;// EM
	    *l2_event = *l2_clone;
	    t_level2->Fill();
	    l2_event->Clear();
	    // COPY COPY COPY
	};
    };
// ------------------------------------------------------------
// ------------------------------------------------------------
//  START LOOP OVER RUNS TO PROCESS/REPROCESS
// ------------------------------------------------------------
// ------------------------------------------------------------
    for(UInt_t idRun = from_run; idRun <= to_run; idRun++){
	
	if(TrkParams::VerboseMode()) cout << endl<<" ========================= Run: "<< idRun << endl;
	UInt_t runheadtime       = 0;
	UInt_t runtrailtime      = 0;
	UInt_t runheadobt       = 0;
	UInt_t runtrailobt      = 0;
	UInt_t    evfrom         = 0;
	UInt_t    evto           = 0;
	UInt_t    nevents        = 0;
	Int_t     id_root_l0     =-1;
	Int_t     trk_calib_used = 0;

 	TString host = glt->CGetHost();  // EMILIANO
 	TString user = glt->CGetUser();  // EMILIANO
 	TString psw = glt->CGetPsw();  // EMILIANO
// 	TString host = "mysql://localhost/pamelaprod";
// 	TString user = "anonymous";
// 	TString psw = "";
// 	const char *pamdbhost=gSystem->Getenv("PAM_DBHOST");
// 	const char *pamdbuser=gSystem->Getenv("PAM_DBUSER");
// 	const char *pamdbpsw=gSystem->Getenv("PAM_DBPSW");
// 	if ( !pamdbhost ) pamdbhost = "";
// 	if ( !pamdbuser ) pamdbuser = "";
// 	if ( !pamdbpsw ) pamdbpsw = "";
// 	if ( strcmp(pamdbhost,"") ) host = pamdbhost;
// 	if ( strcmp(pamdbuser,"") ) user = pamdbuser;
// 	if ( strcmp(pamdbpsw,"") ) psw = pamdbpsw;
	TSQLServer *dbc = TSQLServer::Connect(host.Data(),user.Data(),psw.Data());
	stringstream myquery;   // EMILIANO
	myquery.str("");  // EMILIANO
	myquery << "SET time_zone='+0:00'";  // EMILIANO
	delete dbc->Query(myquery.str().c_str());  // EMILIANO
	if(p->standalone){
	    // ==============================
	    // first query: retrieve run info
	    // ==============================
	    if (q1.Query_GL_RUN(idRun,dbc) )throw -50;
	    id_root_l0     = q1.ID_ROOT_L0;
	    runheadtime    = q1.RUNHEADER_TIME;
	    runtrailtime   = q1.RUNTRAILER_TIME;
	    runheadobt    = q1.RUNHEADER_OBT;
	    runtrailobt   = q1.RUNTRAILER_OBT;
	    evfrom         = q1.EV_FROM;
	    evto           = q1.EV_TO;
	    nevents        = q1.NEVENTS;
	    trk_calib_used = q1.TRK_CALIB_USED;
	}else{
	    // ==============================
	    // get run info from RunInfo tree
	    // ==============================
	    int runinfo_error = runinfo->GetRunInfo(idRun);
	    if( runinfo_error ) throw runinfo_error;
		id_root_l0     = runinfo->ID_ROOT_L0;
	    runheadtime    = runinfo->RUNHEADER_TIME;
	    runtrailtime   = runinfo->RUNTRAILER_TIME;
	    runheadobt    = runinfo->RUNHEADER_OBT;
	    runtrailobt   = runinfo->RUNTRAILER_OBT;
	    evfrom         = runinfo->EV_FROM;
	    evto           = runinfo->EV_TO;
	    nevents        = runinfo->NEVENTS;
	    trk_calib_used = runinfo->TRK_CALIB_USED;

	};

	//
	if(TrkParams::VerboseMode()){
	    cout << "ROOT file ID    "<< id_root_l0     << endl;
	    cout << "RunHeader time  "<< runheadtime    << endl;
	    cout << "RunTrailer time "<< runtrailtime   << endl;
	    cout << " from event  "<< evfrom         << endl;
	    cout << " to event    "<< evto           << endl;
	    cout << " num. events "<< nevents        << endl;
	    cout << "trk-calibration used "<< trk_calib_used << endl;
	};
	// ========================================================
	// second query: search the LEVEL0 file that contains idRun
	// ========================================================
	TString lastfilename = filename;
	if( q3.Query_GL_ROOT(id_root_l0,dbc) )throw -51;
	filename = q3.PATH + q3.NAME;	
	// ========================================================
	// Open the input LEVEL0 data file
	// ========================================================
	if(filename.CompareTo(lastfilename)){
	    if(!lastfilename.IsNull())f0->Close();
	    //if( debug ) cout << "Opening LEVEL0 file: "<< filename << endl;
	    if(TrkParams::VerboseMode()) cout << "Opening LEVEL0 file: "<< filename << endl;
	    FileStat_t t;
	    if( gSystem->GetPathInfo(filename.Data(),t) )throw -6;
	    if ( f0 ) f0->Close();
	    f0 = new TFile(filename);
	    if ( !f0 ) throw -6;
	    physicsTree = (TTree*)f0->Get("Physics");          if(!physicsTree) throw -7;
	    b_header    = physicsTree ->GetBranch("Header");   if(!b_header   ) throw -8;
	    b_trk       = physicsTree ->GetBranch("Tracker");  if(!b_trk      ) throw -203;
	    l0_event->Set();
	    physicsTree->SetBranchAddress("Tracker" ,l0_event->GetPointerToTrackerEvent());
	    physicsTree->SetBranchAddress("Header",&header);
	    
	    nentries = physicsTree->GetEntries(); 
	    if ( nentries < 1 && nevents ) throw -11; // EMILIANO: go on if the file is empty, why not? in principle we should not have any event to process but if the case the next line will take care of exiting; exit only if the file is empty but nevents is not zero
	    if ( nentries < (evto+1) && nevents > 0 ) throw -12; // EMILIANO: if NEVENTS = 0 and the file is empty everything is ok but due to a mistake in the 
								 // variable EV_TO type (UInt_t instead of Int_t) that we don't want to change to avoid changing a lot of code, evto becomes inf hence 
								 // the condition ( nentries < (evto+1) ) is satisfied and DV exit with error even if the error is only in the DB.
	
	};
	
	GL_TIMESYNC *dbtime = new GL_TIMESYNC(id_root_l0,"ID",dbc);	


	// =============================================================
	// retrieve information about parameters to process LEVEL2
	// =============================================================  
	
	TrkParams::Set(runinfo->GetGL_RUN(),dbc);
	for(int i=0; i<p->npar; i++){
	    if(TrkParams::VerboseMode())cout<<" ((( force parameters from input path )))"<<endl;
	    TrkParams::Set(p->parpath[i],p->partype[i]);	    
	}

	TrkParams::Load();
	if( !TrkParams::IsLoaded() )throw -52;

	// =============================================================
	// retrieve calibration file needed to reduce data 
	// =============================================================

  	TrkParams::SetCalib(runinfo->GetGL_RUN(),dbc);
  	TrkParams::LoadCalib( );
  	if( !TrkParams::CalibIsLoaded() )throw -53;
	       
	TBenchmark *reduction = new TBenchmark();
	if(TrkParams::VerboseMode())reduction->Start("reduction");
	Int_t ntrk=0;
	// ====================================================
	// start looping on events cointained in the data file  
	// ====================================================		
	if(dbc){
	  dbc->Close();
	  delete dbc;};
	//
	for (UInt_t re = evfrom+min(p->nskip,nevents); re < evfrom+nevents; re++){
	    
	    ev_count++;

	   	    
//	    if ( TrkParams::DebugMode() && re%100 == 0 && re > 0 ) cout << ".";
	    
	    if ( b_trk->GetEntry(re) <= 0 ) throw -36;//EM
	    if ( b_header->GetEntry(re) <= 0 ) throw -36;//EM
	    pscu = header->GetPscuHeader();
		
	    if( TrkParams::DebugMode() )cout << ">>> "<<ev_count-1<<" @ OBT "<<pscu->GetOrbitalTime()<<endl;
		
	    if ( dbtime->DBabsTime(pscu->GetOrbitalTime()) > (runtrailtime+1) || dbtime->DBabsTime(pscu->GetOrbitalTime()) < (runheadtime-1)) {
			
		if (TrkParams::VerboseMode()){ 
		    printf(" TrkCore - WARNING: event outside the run time window, skipping it\n");
		    cout << " OBT "<<pscu->GetOrbitalTime()<<" RUN "<<runheadobt<<"-"<<runtrailobt<<" ABS-time "<<dbtime->DBabsTime(pscu->GetOrbitalTime())<<" RUN "<<runheadtime<<"-"<<runtrailtime<<endl;
		};		
	    }else{
		if ( TrkParams::DebugMode() )
		    printf("\n-------------------------------\nevent %d\n",re-evfrom);

		p->ProcessEvent(l0_event);
					
		// ----------------
		//  LEVEL1 output
		// ----------------
		if(p->get1){
		    if(p->ifroot1){ // root
			l1_event->Clear();
//			l1_event->SetFromLevel1Struct(&level1event_,p->full1);
			l1_event->SetFromLevel1Struct(p->full1);
			//				t_level1->Fill();
		    }else{       // hbook
			throw -299;
		    };
		};
		// ----------------
		//  HOUGH output
		// ----------------
		if(p->geth){
		    if(p->ifrooth){ // root
			lh_event->Delete();
			lh_event->SetFromHoughStruct(&houghevent_);
		    }else{       // hbook
			throw -299;
		    };
		};
		// ----------------
		//  LEVEL2 output
		// ----------------
		if(p->get2){
		    l2_event->Clear();
		    if(p->get1){
			l2_event->SetFromLevel2Struct(&level2event_,l1_event);//set references to level1
		    }else{
			l2_event->SetFromLevel2Struct(&level2event_);
		    }
//				l2_event->Dump();
		    t_level2->Fill();
		    if( l2_event->ntrk()>0 )ntrk++;
		    if(TrkParams::VerboseMode())l2_event->Dump();
		};
	    };
	}; // end loop on events
	if(TrkParams::VerboseMode()){
	    cout << " >>> processed "<< ev_count <<" events"<< endl;
	    if(ev_count)cout << ntrk << " events with at least one track ("<<(Int_t)(100*ntrk/ev_count)<<"%)\n";
	    reduction->Show("reduction");
	}
	delete reduction;
	
	delete dbtime;

    }; // end loop on runs
    
    
// ------------------------------------------------------------
//  if reprocessing one run, copy all the events AFTER the run
// ------------------------------------------------------------
    if( !(p->standalone) ){
	for(UInt_t i=runinfo->GetLastEntry()+1; i<runinfo->GetFileEntries(); i++){
	    if ( t_clone->GetEntry(i) <= 0 ) throw -36;//EM
	    *l2_event = *l2_clone;
	    t_level2->Fill();
	    l2_event->Clear();
	    // COPY COPY COPY
	};
    };
    // ---------------
    // close the files
    // ---------------
    if(p->get2){
      	if( t_clone )t_clone->Delete("all");//delete old tree from file
	if( !(p->standalone) )runinfo->Close();
//	t_level2->Write("Tracker", TObject::kOverwrite);
	f2->Write("Tracker", TObject::kOverwrite);
       	if( t_level2 )t_level2->Delete();  //delete new tree from memory
	
    };
    
    if(f0) if(f0->IsOpen()) f0->Close();
//    if( f0_c->IsOpen() )f0_c->Close();
    
//    lh_event->Delete();
    l1_event->Delete();
    l2_event->Delete();
    l2_clone->Delete();
    
    return(p->ostatus);
}