/**
 * @file   MakeFMDMCTrackTrain.C
 * @author Christian Holm Christensen <cholm@nbi.dk>
 * @date   Fri Jun  1 13:54:47 2012
 * 
 * @brief  
 * 
 * @ingroup pwglf_forward_trains_specific
 */
#include "TrainSetup.C"
// #include "ParUtilities.C"

//====================================================================
/**
 * Analysis train to make Forward and Central MC corrections
 * 
 *
 * @ingroup pwglf_forward_mc
 * @ingroup pwglf_forward_trains_specific
 */
class MakeFMDMCTrackTrain : public TrainSetup
{
public:
  /** 
   * Constructor.  Date and time must be specified when running this
   * in Termiante mode on Grid
   * 
   * @param name     Name of train (free form)
   */
  MakeFMDMCTrackTrain(const  char* name) 
    : TrainSetup(name)
  {
    fOptions.Add("use-tuple", "Whether to make an NTuple of hits");
    fOptions.Add("max-strips", "NUMBER", "Max strips/cluster", 2);
    fOptions.Set("type", "ESD");
  }
protected:
  /** 
   * Create the tasks 
   * 
   * @param mgr  Analysis manager 
   */
  void CreateTasks(AliAnalysisManager* mgr)
  {
    // --- Output file name ------------------------------------------
    AliAnalysisManager::SetCommonFileName("forward_mctracks.root");


    // --- Load libraries/pars ---------------------------------------
    fRailway->LoadLibrary("PWGLFforward2");
    // fRailway->LoadLibrary("Proof");
    // fRailway->LoadLibrary("Gui"); // Sigh! CDB depends on GUI!
    // fRailway->LoadLibrary("CDB");
    // fRailway->LoadLibrary("RAWDatabase");
    // fRailway->LoadLibrary("STEER");
    // fRailway->LoadLibrary("FMDbase");
    // fRailway->LoadLibrary("FMDsim");
    // fRailway->LoadLibrary("PWGLFforwardhit");
    
    // --- Set load path ---------------------------------------------
    gROOT->SetMacroPath(Form("%s:$(ALICE_ROOT)/PWGLF/FORWARD/analysis2",
			     gROOT->GetMacroPath()));

    // --- Check if this is MC ---------------------------------------
    if (!mgr->GetMCtruthEventHandler()) 
      Fatal("CreateTasks", "No MC truth handler");
    
    Bool_t   useTuple  = fOptions.AsBool("use-tuple");
    UShort_t maxStrips = fOptions.AsInt("max-strips");
    Int_t    verbose   = fOptions.AsInt("verbose");

    TString args = TString::Format("%d,%d,%d", 
				   useTuple,
				   maxStrips, 
				   verbose);
    if (!CoupleCar("AddTaskFMDMCTracks.C", args))
      Fatal("CreateTasks", "Couldn't add our task");
  }
  //__________________________________________________________________
  /** 
   * Create physics selection , and add to manager
   * 
   * @param mc Whether this is for MC 
   * @param mgr Manager 
   */
  void CreatePhysicsSelection(Bool_t mc,
			      AliAnalysisManager* mgr)
  {
    TrainSetup::CreatePhysicsSelection(mc, mgr);

    // --- Get input event handler -----------------------------------
    AliInputEventHandler* ih =
      dynamic_cast<AliInputEventHandler*>(mgr->GetInputEventHandler());
    if (!ih) 
      Fatal("CreatePhysicsSelection", "Couldn't get input handler (%p)", ih);
    
    // --- Get Physics selection -------------------------------------
    AliPhysicsSelection* ps = 
      dynamic_cast<AliPhysicsSelection*>(ih->GetEventSelection());
    if (!ps) 
      Fatal("CreatePhysicsSelection", "Couldn't get PhysicsSelection (%p)", ps);

    // --- Ignore trigger class when selecting events.  This means ---
    // --- that we get offline+(A,C,E) events too --------------------
    // ps->SetSkipTriggerClassSelection(true);
  }
  //__________________________________________________________________
  /** 
   * @return 0 - AOD disabled 
   */
  virtual AliVEventHandler* CreateOutputHandler(UShort_t) { return 0; }
  /** 
   * Do not the centrality selection
   */
  // void CreateCentralitySelection(Bool_t) {}
  //__________________________________________________________________
  const char* ClassName() const { return "MakeFMDMCTrackTrain"; }

  /** 
   * Overloaded to create new dNdeta.C and dndeta.sh in the output 
   * directory
   * 
   * @param asShellScript 
   */
  void SaveSetup(Bool_t asShellScript)
  {
    TrainSetup::SaveSetup(asShellScript);
    SaveSummarize();
    SaveAnalyseNTuple();
    SaveReFit();


    if (!fRailway || fRailway->Mode() != Railway::kGrid) return;

    SaveDownloadTrees();

  }
  /** 
   * Write a ROOT script to draw summary 
   * 
   */
  void SaveSummarize()
  {
    std::ofstream f("Summarize.C");
    if (!f) { 
      Error("SaveSummarize", "Failed to open Summarize.C script");
      return;
    }
    f << "// Generated by " << ClassName() << "\n"
      << "// WHAT is a bit mask of\n"
      << "//   0x001     Event inspector\n"
      << "//   0x002     Track inspector\n"
      << "//   0x004     Energy loss fits\n"
      << "//   0x100     Landscape\n"
      << "//   0x200     Pause\n"
      << "//\n"
      << "void Summarize(const char* filename=\"forward_mctracks.root\",\n"
      << "               UShort_t what=0x10F)\n"
      << "{\n"
      << "  const char* fwd=\"$ALICE_ROOT/PWGLF/FORWARD/analysis2\";\n"
      << "  gROOT->LoadMacro(Form(\"%s/scripts/SummaryMCTrackDrawer.C+g\",fwd));\n"
      << "  SummaryMCTrackDrawer smd;\n"
      << "  smd.Run(filename,what);\n"
      << "}\n"
      << "// EOF" << std::endl;
    f.close();
  }
  /** 
   * Make a ROOT Script to download the generated AODs
   * 
   */
  void SaveDownloadTrees()
  {
    std::ofstream f("DownloadTrees.C");
    if (!f) { 
      Error("SaveDownloadTrees", "Failed to open DownloadTrees.C");
      return;
    }
    f << "// Generated by " << ClassName() << "\n"
      << "void DownloadTrees(Bool_t force=false)\n"
      << "{\n"
      << "  if (!TGrid::Connect(\"alien://\")) {\n"
      << "    Error(\"DownloadTrees\",\"Failed to connect to AliEn\");\n"
      << "    return;\n"
      << "  }\n\n"
      << "  TString dir(\"" << fRailway->OutputPath() << "\");\n"
      << "  TString pat(\"*/forward_tuple.root\");\n"
      << "  TGridResult* r = gGrid->Query(dir,pat);\n"
      << "  if (!r) {\n"
      << "    Error(\"DownloadTrees\",\"No result from query\");\n"
      << "    return;\n"
      << "  }\n\n"
      << "  Int_t n = r->GetEntries();\n"
      << "  Printf(\"=== Got a total of %d AOD files\",n);\n"
      << "  for (Int_t i = 0; i < n; i++) {\n"
      << "     TString path(r->GetKey(i, \"turl\"));\n"
      << "     TString dir(gSystem->DirName(path));\n"
      << "     TString sub(gSystem->BaseName(dir));\n"
      << "     TString subsub(gSystem->BaseName(gSystem->DirName(dir)));\n"
      << "     TString out = TString::Format(\"forward_tree_%s_%s.root\",\n"
      << "                                   subsub.Data(),sub.Data());\n"
      << "     if (!gSystem->AccessPathName(out.Data()) && !force) {\n"
      << "       Printf(\"=== Already have %s\",out.Data());\n"
      << "       continue;\n"
      << "     }\n"
      << "     Printf(\"=== Getting %s %s (%3d/%3d)\",\n"
      << "            subsub.Data(),sub.Data(),i,n);\n"
      << "     if (!TFile::Cp(path, out)) {\n"
      << "       Warning(\"DownloadTrees\",\"Failed to copy %s -> %s\",\n"
      << "               path.Data(), out.Data());\n"
      << "       continue;\n"
      << "     }\n"
      << "   }\n"
      << "}\n"
      << "// EOF\n"
      << std::endl;
    f.close();
  }   
  /** 
   * Make a ROOT Script to download the generated AODs
   * 
   */
  void SaveAnalyseNTuple()
  {
    std::ofstream f("AnalyseNTuple.C");
    if (!f) { 
      Error("SaveAnalyseNTuple", "Failed to open AnalyseNTuple.C");
      return;
    }
    f << "// Generated by " << ClassName() << "\n"
      << "// Process with bare ROOT in ProofLite\n"
      << "void AnalyseNTuple(Bool_t proof=true,\n"
      << "                   Long64_t max=-1,\n"
      << "                   const char* opt=\"\")\n"
      << "{\n"
      << "  const char* fwd=\"$ALICE_ROOT/PWGLF/FORWARD/analysis2\";\n"
      << "  gSystem->AddIncludePath(\"-I${ALICE_ROOT}/include\");\n"
      << "  gROOT->Macro(Form(\"%s/scripts/LoadLibs.C\",fwd));\n"
      << "  gROOT->LoadMacro(Form(\"%s/scripts/TupleSelector.C+%s\",\n"
      << "                        fwd, opt));\n"
      << "  if (proof) TupleSelector::Proof(maxEvents, opt);\n"
      << "  else       TupleSelector::Run(maxEvents);\n"
      << "}\n"
      << "// EOF" << std::endl;
    f.close();
  }
  void SaveReFit()
  {
    std::ofstream f("ReFit.C");
    if (!f) { 
      Error("SaveRerun", "Failed to open ReFit.C script");
      return;
    }
    f << std::boolalpha 
      << "// Generated by " << ClassName() << "\n"
      << "// If force=true, then force set parameters\n"
      << "//\n"
      << "void ReFit(Bool_t      force=false,\n"
      << "           const char* filename=\"forward_mctracks.root\")\n"
      << "{\n"
      << "  const char* fwd=\"$ALICE_ROOT/PWGLF/FORWARD/analysis2\";\n"
      << "  gROOT->LoadMacro(Form(\"%s/corrs/RerunTrackELoss.C\",fwd));\n"
      << "  RerunTrackELoss(force,filename);\n"
      << "}\n"
      << "// EOF" << std::endl;
    f.close();
  }

  void PostShellCode(std::ostream& f)
  {
    f << "  echo \"=== Summarizing results ...\"\n"
      << "  aliroot -l -b -q ${prefix}Summarize.C\n"
      << std::endl;
  }

};

//
// EOF
//