//
// Configuration for p-p Diffraction studies
// STARLIGHT pp 7000

// One can use the configuration macro in compiled mode by
// root [0] gSystem->Load("libgeant321");
// root [0] gSystem->SetIncludePath("-I$ROOTSYS/include -I$ALICE_ROOT/include\
//                   -I$ALICE_ROOT -I$ALICE/geant3/TGeant3");
// root [0] .x grun.C(1,"Config.C++")

#if !defined(__CINT__) || defined(__MAKECINT__)
#include <Riostream.h>
#include <TRandom.h>
#include <TDatime.h>
#include <TSystem.h>
#include <TVirtualMC.h>
#include <TGeant3TGeo.h>
#include "STEER/AliRunLoader.h"
#include "STEER/AliRun.h"
#include "STEER/AliConfig.h"
#include "PYTHIA6/AliDecayerPythia.h"
#include "PYTHIA6/AliGenPythia.h"
#include "TDPMjet/AliGenDPMjet.h"
#include "STEER/AliMagFCheb.h"
#include "STRUCT/AliBODY.h"
#include "STRUCT/AliMAG.h"
#include "STRUCT/AliABSOv3.h"
#include "STRUCT/AliDIPOv3.h"
#include "STRUCT/AliHALLv3.h"
#include "STRUCT/AliFRAMEv2.h"
#include "STRUCT/AliSHILv3.h"
#include "STRUCT/AliPIPEv3.h"
#include "ITS/AliITSv11Hybrid.h"
#include "TPC/AliTPCv2.h"
#include "TOF/AliTOFv6T0.h"
#include "HMPID/AliHMPIDv3.h"
#include "ZDC/AliZDCv3.h"
#include "TRD/AliTRDv1.h"
#include "TRD/AliTRDgeometry.h"
#include "FMD/AliFMDv1.h"
#include "MUON/AliMUONv1.h"
#include "PHOS/AliPHOSv1.h"
#include "PHOS/AliPHOSSimParam.h"
#include "PMD/AliPMDv1.h"
#include "T0/AliT0v1.h"
#include "EMCAL/AliEMCALv2.h"
#include "ACORDE/AliACORDEv1.h"
#include "VZERO/AliVZEROv7.h"
#endif


enum PDC06Proc_t
{
  kStarlight, kRunMax,
};

const char * pprRunName[] = {
  "kStarlight"
};

enum Mag_t
{
  kNoField, k5kG, kFieldMax
};

const char * pprField[] = {
  "kNoField", "k5kG"
};

//--- Functions ---
void ProcessEnvironmentVars();

// Generator, field, beam energy
static PDC06Proc_t   proc         = kStarlight;
static Mag_t         mag          = k5kG;
static Float_t       energy       = 7000; // energy in CMS
static Float_t       pBeamEnergy  = 3500.; // energy p-Beam
static Int_t         runNumber    = 0; 
static Int_t         eventOffset  = 0;

//========================//
// Set Random Number seed //
//========================//
TDatime dt;
static UInt_t seed    = dt.Get();

// Comment line
static TString comment;

void Config()
{
  // Get settings from environment variables
  ProcessEnvironmentVars();

  gRandom->SetSeed(seed);
  cerr<<"Seed for random number generation= "<<seed<<endl;

  // Libraries required by geant321
#if defined(__CINT__)
  gSystem->Load("liblhapdf");      // Parton density functions
  gSystem->Load("libEGPythia6");   // TGenerator interface
//   if (proc == kPythia6 || proc == kPhojet) {
//     gSystem->Load("libpythia6");        // Pythia 6.2
//   } else {
     gSystem->Load("libpythia6.4.21");   // Pythia 6.4
//   }
  gSystem->Load("libAliPythia6");  // ALICE specific implementations
  gSystem->Load("libgeant321");
#endif

  new TGeant3TGeo("C++ Interface to Geant3");

  //=======================================================================
  //  Create the output file


  AliRunLoader* rl=0x0;

  cout<<"Config.C: Creating Run Loader ..."<<endl;
  rl = AliRunLoader::Open("galice.root",
			  AliConfig::GetDefaultEventFolderName(),
			  "recreate");
  if (rl == 0x0)
    {
      gAlice->Fatal("Config.C","Can not instatiate the Run Loader");
      return;
    }
  rl->SetCompressionLevel(2);
  rl->SetNumberOfEventsPerFile(1000);
  gAlice->SetRunLoader(rl);
  // gAlice->SetGeometryFromFile("geometry.root");
  // gAlice->SetGeometryFromCDB();

  // Set the trigger configuration: proton-proton
  AliSimulation::Instance()->SetTriggerConfig("p-p"); 

  //
  //=======================================================================
  // ************* STEERING parameters FOR ALICE SIMULATION **************
  // --- Specify event type to be tracked through the ALICE setup
  // --- All positions are in cm, angles in degrees, and P and E in GeV

  gMC->SetProcess("DCAY",1);
  gMC->SetProcess("PAIR",1);
  gMC->SetProcess("COMP",1);
  gMC->SetProcess("PHOT",1);
  gMC->SetProcess("PFIS",0);
  gMC->SetProcess("DRAY",0);
  gMC->SetProcess("ANNI",1);
  gMC->SetProcess("BREM",1);
  gMC->SetProcess("MUNU",1);
  gMC->SetProcess("CKOV",1);
  gMC->SetProcess("HADR",1);
  gMC->SetProcess("LOSS",2);
  gMC->SetProcess("MULS",1);
  gMC->SetProcess("RAYL",1);

  Float_t cut = 1.e-3;        // 1MeV cut by default
  Float_t tofmax = 1.e10;

  gMC->SetCut("CUTGAM", cut);
  gMC->SetCut("CUTELE", cut);
  gMC->SetCut("CUTNEU", cut);
  gMC->SetCut("CUTHAD", cut);
  gMC->SetCut("CUTMUO", cut);
  gMC->SetCut("BCUTE",  cut);
  gMC->SetCut("BCUTM",  cut);
  gMC->SetCut("DCUTE",  cut);
  gMC->SetCut("DCUTM",  cut);
  gMC->SetCut("PPCUTM", cut);
  gMC->SetCut("TOFMAX", tofmax);

  //======================//
  // Set External decayer //
  //======================//
  TVirtualMCDecayer* decayer = new AliDecayerPythia();
  decayer->SetForceDecay(kAll);

  decayer->Init();
  gMC->SetExternalDecayer(decayer);

  //=========================//
  // Generator Configuration //
  //=========================//
  AliGenerator* gener = 0x0;

  if (proc == kStarlight) {
    gSystem->AddDynamicPath("../../objdir/lib/tgt_linux");
    gSystem->Load("libStarLight");
    gSystem->Load("libAliStarLight.so");

    AliGenStarLight* sl = new AliGenStarLight(1000*1000);

    sl->SetParameter("BEAM_1_Z     =   82    #Z of projectile");
    sl->SetParameter("BEAM_1_A     =  208    #A of projectile");
    sl->SetParameter("BEAM_2_Z     =   82    #Z of target");
    sl->SetParameter("BEAM_2_A     =  208    #A of target");
    sl->SetParameter("BEAM_1_GAMMA = 1470    #Gamma of the colliding ions");
    sl->SetParameter("BEAM_2_GAMMA = 1470    #Gamma of the colliding ions");
    sl->SetParameter("W_MAX        =   12.0  #Max value of w");
    sl->SetParameter("W_MIN        =    2.0  #Min value of w");
    sl->SetParameter("W_N_BINS     =   40    #Bins i w");
    sl->SetParameter("RAP_MAX      =    8.   #max y");
    sl->SetParameter("RAP_N_BINS   =   80    #Bins i y");
    sl->SetParameter("CUT_PT       =    0    #Cut in pT? 0 = (no, 1 = yes)");
    sl->SetParameter("PT_MIN       =    1.0  #Minimum pT in GeV");
    sl->SetParameter("PT_MAX       =    3.0  #Maximum pT in GeV");
    sl->SetParameter("CUT_ETA      =    0    #Cut in pseudorapidity? (0 = no, 1 = yes)");
    sl->SetParameter("ETA_MIN      =  -10    #Minimum pseudorapidity");
    sl->SetParameter("ETA_MAX      =   10    #Maximum pseudorapidity");
    sl->SetParameter("PROD_MODE    =    2    #gg or gP switch (1 = 2-photon, 2 = coherent vector meson (narrow), 3 = coherent vector meson (wide), # 4 = incoherent vector meson, 5 = A+A DPMJet single, 6 = A+A DPMJet double, 7 = p+A DPMJet single, 8 = p+A Pythia single )");
    // is N_EVENTS valid
    sl->SetParameter("N_EVENTS     = 10000000  #Number of events");
    sl->SetParameter("PROD_PID     =  113    #Channel of interest (not relevant for photonuclear processes)");
    sl->SetParameter(Form("RND_SEED = %d  #Random number seed", seed));
    sl->SetParameter("OUTPUT_FORMAT =   2    #Form of the output");
    sl->SetParameter("BREAKUP_MODE  =   5    #Controls the nuclear breakup");
    sl->SetParameter("INTERFERENCE  =   0    #Interference (0 = off, 1 = on)");
    sl->SetParameter("IF_STRENGTH   =   1.   #% of intefernce (0.0 - 0.1)");
    sl->SetParameter("COHERENT      =   1    #Coherent=1,Incoherent=0");
    sl->SetParameter("INCO_FACTOR   =   1.   #percentage of incoherence");
    sl->SetParameter("BFORD         =   9.5  #");
    sl->SetParameter("INT_PT_MAX    =   0.24 #Maximum pt considered, when interference is turned on");
    sl->SetParameter("INT_PT_N_BINS = 120    #Number of pt bins when interference is turned on");

    sl->Init();
    sl->GetTStarLight()->PrintInputs(std::cout);
    
    AliGenerator* gener = sl;
    gener->SetOrigin(0, 0, 0);    // vertex position
    gener->SetSigma(0, 0, 5.3);   // Sigma in (X,Y,Z) (cm) on IP position
    gener->SetCutVertexZ(1.);     // Truncate at 1 sigma
    gener->SetVertexSmear(kPerEvent); 
    gener->SetTrackingFlag(1);
    gener->Init();
  }

  //
  //
  // Size of the interaction diamond
  // Longitudinal
  Float_t sigmaz  = 5.4 / TMath::Sqrt(2.); // [cm]
  //   if (energy == 900)
  //sigmaz  = 10.5 / TMath::Sqrt(2.); // [cm]
  //sigmaz = 3.7;
  if (energy == 7000)
    sigmaz  = 6.3 / TMath::Sqrt(2.); // [cm]
  
  //
  // Transverse
  Float_t betast  = 10;                 // beta* [m]
  if (runNumber >= 117048) betast = 2.;
  if (runNumber >  122375) betast = 3.5; // starting with fill 1179

  Float_t eps     = 5.e-6;            // emittance [m]
  Float_t gamma   = energy / 2.0 / 0.938272;  // relativistic gamma [1]
  Float_t sigmaxy = TMath::Sqrt(eps * betast / gamma) / TMath::Sqrt(2.) * 100.;  // [cm]
  printf("\n \n Diamond size x-y: %10.3e z: %10.3e\n \n", sigmaxy, sigmaz);

  gener->SetSigma(sigmaxy, sigmaxy, sigmaz);      // Sigma in (X,Y,Z) (cm) on IP position
  gener->SetVertexSmear(kPerEvent);
  gener->Init();

  printf("\n \n Comment: %s \n \n", comment.Data());

  //!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
  TGeoGlobalMagField::Instance()->SetField(new AliMagF("Maps","Maps", -1., -1., AliMagF::k5kG,
						       AliMagF::kBeamTypepp, pBeamEnergy));

  rl->CdGAFile();

  Int_t iABSO  = 1;
  Int_t iACORDE= 0;
  Int_t iDIPO  = 1;
  Int_t iEMCAL = 1;
  Int_t iFMD   = 1;
  Int_t iFRAME = 1;
  Int_t iHALL  = 1;
  Int_t iITS   = 1;
  Int_t iMAG   = 1;
  Int_t iMUON  = 1;
  Int_t iPHOS  = 1;
  Int_t iPIPE  = 1;
  Int_t iPMD   = 1;
  Int_t iHMPID = 1;
  Int_t iSHIL  = 1;
  Int_t iT0    = 1;
  Int_t iTOF   = 1;
  Int_t iTPC   = 1;
  Int_t iTRD   = 1;
  Int_t iVZERO = 1;
  Int_t iZDC   = 1;


  //=================== Alice BODY parameters =============================
  AliBODY *BODY = new AliBODY("BODY", "Alice envelop");


  if (iMAG)
    {
      //=================== MAG parameters ============================
      // --- Start with Magnet since detector layouts may be depending ---
      // --- on the selected Magnet dimensions ---
      AliMAG *MAG = new AliMAG("MAG", "Magnet");
    }


  if (iABSO)
    {
      //=================== ABSO parameters ============================
      AliABSO *ABSO = new AliABSOv3("ABSO", "Muon Absorber");
    }

  if (iDIPO)
    {
      //=================== DIPO parameters ============================

      AliDIPO *DIPO = new AliDIPOv3("DIPO", "Dipole version 3");
    }

  if (iHALL)
    {
      //=================== HALL parameters ============================

      AliHALL *HALL = new AliHALLv3("HALL", "Alice Hall");
    }


  if (iFRAME)
    {
      //=================== FRAME parameters ============================

      AliFRAMEv2 *FRAME = new AliFRAMEv2("FRAME", "Space Frame");
      FRAME->SetHoles(1);
    }

  if (iSHIL)
    {
      //=================== SHIL parameters ============================

      AliSHIL *SHIL = new AliSHILv3("SHIL", "Shielding Version 3");
    }


  if (iPIPE)
    {
      //=================== PIPE parameters ============================

      AliPIPE *PIPE = new AliPIPEv3("PIPE", "Beam Pipe");
    }

  if (iITS)
    {
      //=================== ITS parameters ============================

      AliITS *ITS  = new AliITSv11("ITS","ITS v11");
    }

  if (iTPC)
    {
      //============================ TPC parameters =====================

      AliTPC *TPC = new AliTPCv2("TPC", "Default");
    }


  if (iTOF) {
    //=================== TOF parameters ============================

    AliTOF *TOF = new AliTOFv6T0("TOF", "normal TOF");
  }


  if (iHMPID)
    {
      //=================== HMPID parameters ===========================

      AliHMPID *HMPID = new AliHMPIDv3("HMPID", "normal HMPID");

    }


  if (iZDC)
    {
      //=================== ZDC parameters ============================

      AliZDC *ZDC = new AliZDCv3("ZDC", "normal ZDC");
    }

  if (iTRD)
    {
      //=================== TRD parameters ============================

      AliTRD *TRD = new AliTRDv1("TRD", "TRD slow simulator");
      AliTRDgeometry *geoTRD = TRD->GetGeometry();
      // Partial geometry: modules at 0,1,7,8,9,16,17
      // starting at 3h in positive direction
      geoTRD->SetSMstatus(2,0);
      geoTRD->SetSMstatus(3,0);
      geoTRD->SetSMstatus(4,0);
      geoTRD->SetSMstatus(5,0);
      geoTRD->SetSMstatus(6,0);
      geoTRD->SetSMstatus(11,0);
      geoTRD->SetSMstatus(12,0);
      geoTRD->SetSMstatus(13,0);
      geoTRD->SetSMstatus(14,0);
      geoTRD->SetSMstatus(15,0);
      geoTRD->SetSMstatus(16,0);
    }

  if (iFMD)
    {
      //=================== FMD parameters ============================

      AliFMD *FMD = new AliFMDv1("FMD", "normal FMD");
    }

  if (iMUON)
    {
      //=================== MUON parameters ===========================
      // New MUONv1 version (geometry defined via builders)

      AliMUON *MUON = new AliMUONv1("MUON", "default");
    }

  if (iPHOS)
    {
      //=================== PHOS parameters ===========================

      AliPHOS *PHOS = new AliPHOSv1("PHOS", "noCPV_Modules123");

    }


  if (iPMD)
    {
      //=================== PMD parameters ============================

      AliPMD *PMD = new AliPMDv1("PMD", "normal PMD");
    }

  if (iT0)
    {
      //=================== T0 parameters ============================
      AliT0 *T0 = new AliT0v1("T0", "T0 Detector");
    }

  if (iEMCAL)
    {
      //=================== EMCAL parameters ============================

      AliEMCAL *EMCAL = new AliEMCALv2("EMCAL", "EMCAL_FIRSTYEAR");
    }

  if (iACORDE)
    {
      //=================== ACORDE parameters ============================

      AliACORDE *ACORDE = new AliACORDEv1("ACORDE", "normal ACORDE");
    }

  if (iVZERO)
    {
      //=================== ACORDE parameters ============================

      AliVZERO *VZERO = new AliVZEROv7("VZERO", "normal VZERO");
    }
}

void ProcessEnvironmentVars()
{
  // Run type
  if (gSystem->Getenv("CONFIG_RUN_TYPE")) {
    for (Int_t iRun = 0; iRun < kRunMax; iRun++) {
      if (strcmp(gSystem->Getenv("CONFIG_RUN_TYPE"), pprRunName[iRun])==0) {
	proc = (PDC06Proc_t)iRun;
	cout<<"Run type set to "<<pprRunName[iRun]<<endl;
      }
    }
  }
  // Field
  if (gSystem->Getenv("CONFIG_FIELD")) {
    for (Int_t iField = 0; iField < kFieldMax; iField++) {
      if (strcmp(gSystem->Getenv("CONFIG_FIELD"), pprField[iField])==0) {
	mag = (Mag_t)iField;
	cout<<"Field set to "<<pprField[iField]<<endl;
      }
    }
  }
  // Energy
  if (gSystem->Getenv("CONFIG_ENERGY")) {
    energy = atoi(gSystem->Getenv("CONFIG_ENERGY"));
    cout<<"Energy set to "<<energy<<" GeV"<<endl;
  }
  // Random Number seed
  if (gSystem->Getenv("CONFIG_SEED")) {
    seed = atoi(gSystem->Getenv("CONFIG_SEED"));
  }
  // Run number
  if (gSystem->Getenv("DC_RUN")) {
    runNumber = atoi(gSystem->Getenv("DC_RUN"));
  }
  // Event offset
  if (gSystem->Getenv("DC_EVENT")) {
    eventOffset = 400*(atoi(gSystem->Getenv("DC_EVENT")) - 1); // 400 events per job (->sim.C)
    std::cout << "eventOffset= " << eventOffset << std::endl;
  }
}