// -*- C++ -*-
//
// Package:     Core
// Class  :     Context
//
// Implementation:
//     <Notes on implementation>
//
// Original Author:  Chris Jones
//         Created:  Tue Sep 30 14:57:12 EDT 2008
//

// system include files

// user include files
#include "TH2.h"
#include "TMath.h"
#include "TEveTrackPropagator.h"
#include "TEveCaloData.h"
#include "Fireworks/Core/interface/fw3dlego_xbins.h"

#include "Fireworks/Core/interface/Context.h"
#include "Fireworks/Core/interface/FWMagField.h"
#include "Fireworks/Core/interface/FWBeamSpot.h"
#include "Fireworks/Core/interface/CmsShowCommon.h"

#include <functional>

using namespace fireworks;

Context* Context::s_fwContext = nullptr;

const float Context::s_caloTransEta = 1.479;
const float Context::s_caloTransAngle = 2 * atan(exp(-s_caloTransEta));

// simplified
const float Context::s_caloZ = 290;
const float Context::s_caloR = s_caloZ * tan(s_caloTransAngle);

/*
// barrel
const float Context::s_caloR1 = 129;
const float Context::s_caloZ1 = s_caloR1/tan(s_caloTransAngle);
// endcap
const float Context::s_caloZ2 = 315.4;
const float Context::s_caloR2 = s_caloZ2*tan(s_caloTransAngle);
*/

// calorimeter offset between TEveCalo and outlines (used by proxy builders)
const float Context::s_caloOffR = 10;
const float Context::s_caloOffZ = s_caloOffR / tan(s_caloTransAngle);

// mtd data [cm]
const float Context::s_mtdEtlR1 = 30.;
const float Context::s_mtdEtlR2 = 119.;
const float Context::s_mtdEtlZ1 = 298.9;
const float Context::s_mtdEtlZ2 = 301.25;
const float Context::s_mtdEtlOffZ = 2.5;

//
// constructors and destructor
//
Context::Context(FWModelChangeManager* iCM,
                 FWSelectionManager* iSM,
                 FWEventItemsManager* iEM,
                 FWColorManager* iColorM,
                 FWJobMetadataManager* iJMDM)
    : m_changeManager(iCM),
      m_selectionManager(iSM),
      m_eventItemsManager(iEM),
      m_colorManager(iColorM),
      m_metadataManager(iJMDM),
      m_geom(nullptr),
      m_propagator(nullptr),
      m_trackerPropagator(nullptr),
      m_muonPropagator(nullptr),
      m_magField(nullptr),
      m_beamSpot(nullptr),
      m_commonPrefs(nullptr),
      m_maxEt(1.f),
      m_maxEnergy(1.f),
      m_hidePFBuilders(false),
      m_caloData(nullptr),
      m_caloDataHF(nullptr) {
  if (iColorM)  // unit test
    m_commonPrefs = new CmsShowCommon(this);

  s_fwContext = this;
}

Context::~Context() { delete m_commonPrefs; }

void Context::initEveElements() {
  m_magField = new FWMagField();
  m_beamSpot = new FWBeamSpot();

  float propagatorOffR = 5;
  float propagatorOffZ = propagatorOffR * caloZ1(false) / caloR1(false);

  // common propagator, helix stepper
  m_propagator = new TEveTrackPropagator();
  m_propagator->SetMagFieldObj(m_magField, false);
  m_propagator->SetMaxR(caloR2() - propagatorOffR);
  m_propagator->SetMaxZ(caloZ2() - propagatorOffZ);
  m_propagator->SetDelta(0.01);
  m_propagator->SetProjTrackBreaking(m_commonPrefs->getProjTrackBreaking());
  m_propagator->SetRnrPTBMarkers(m_commonPrefs->getRnrPTBMarkers());
  m_propagator->IncDenyDestroy();
  // tracker propagator
  m_trackerPropagator = new TEveTrackPropagator();
  m_trackerPropagator->SetStepper(TEveTrackPropagator::kRungeKutta);
  m_trackerPropagator->SetMagFieldObj(m_magField, false);
  m_trackerPropagator->SetDelta(0.01);
  m_trackerPropagator->SetMaxR(caloR1() - propagatorOffR);
  m_trackerPropagator->SetMaxZ(caloZ2() - propagatorOffZ);
  m_trackerPropagator->SetProjTrackBreaking(m_commonPrefs->getProjTrackBreaking());
  m_trackerPropagator->SetRnrPTBMarkers(m_commonPrefs->getRnrPTBMarkers());
  m_trackerPropagator->IncDenyDestroy();
  // muon propagator
  m_muonPropagator = new TEveTrackPropagator();
  m_muonPropagator->SetStepper(TEveTrackPropagator::kRungeKutta);
  m_muonPropagator->SetMagFieldObj(m_magField, false);
  m_muonPropagator->SetDelta(0.05);
  m_muonPropagator->SetMaxR(850.f);
  m_muonPropagator->SetMaxZ(1100.f);
  m_muonPropagator->SetProjTrackBreaking(m_commonPrefs->getProjTrackBreaking());
  m_muonPropagator->SetRnrPTBMarkers(m_commonPrefs->getRnrPTBMarkers());
  m_muonPropagator->IncDenyDestroy();

  // general calo data
  {
    m_caloData = new TEveCaloDataHist();
    m_caloData->IncDenyDestroy();

    // Phi range is always in the (-Pi, Pi) without a shift.
    // Set wrap to false for the optimisation on TEveCaloData::GetCellList().
    m_caloData->SetWrapTwoPi(false);

    Bool_t status = TH1::AddDirectoryStatus();
    TH1::AddDirectory(kFALSE);  //Keeps histogram from going into memory
    TH2F* dummy =
        new TH2F("background", "background", fw3dlego::xbins_n - 1, fw3dlego::xbins, 72, -1 * TMath::Pi(), TMath::Pi());

    TH1::AddDirectory(status);
    Int_t sliceIndex = m_caloData->AddHistogram(dummy);
    (m_caloData)->RefSliceInfo(sliceIndex).Setup("background", 0., 0);
  }
  // HF calo data
  {
    m_caloDataHF = new TEveCaloDataVec(1);
    m_caloDataHF->IncDenyDestroy();
    m_caloDataHF->SetWrapTwoPi(false);
    m_caloDataHF->RefSliceInfo(0).Setup("bg", 0.3, kRed);
    m_caloDataHF->SetEtaBins(new TAxis(fw3dlego::xbins_hf_n - 1, fw3dlego::xbins_hf));
    Double_t off = 10 * TMath::DegToRad();
    m_caloDataHF->SetPhiBins(new TAxis(36, -TMath::Pi() - off, TMath::Pi() - off));
  }
}

void Context::deleteEveElements() {
  // AMT: delete of eve-elements disabled to prevent crash on exit.
  // A lot of eve objects use this elements (e.g. TEveCalo, TEveTrack ...)
  // If want to have explicit delete make sure order of destruction
  // is correct: this should be called after all scenes are destroyed.
}

CmsShowCommon* Context::commonPrefs() const { return m_commonPrefs; }

void Context::voteMaxEtAndEnergy(float et, float energy) const {
  m_maxEt = TMath::Max(et, m_maxEt);
  m_maxEnergy = TMath::Max(energy, m_maxEnergy);
}

void Context::resetMaxEtAndEnergy() const {
  // should not be zero, problems with infinte bbox

  m_maxEnergy = 1.f;
  m_maxEt = 1.f;
}

float Context::getMaxEnergyInEvent(bool isEt) const { return isEt ? m_maxEt : m_maxEnergy; }

//
// static member functions
//

float Context::caloR1(bool offset) { return offset ? (s_caloR - offset) : s_caloR; }

float Context::caloR2(bool offset) { return offset ? (s_caloR - offset) : s_caloR; }
float Context::caloZ1(bool offset) { return offset ? (s_caloZ - offset) : s_caloZ; }

float Context::caloZ2(bool offset) { return offset ? (s_caloZ - offset) : s_caloZ; }

float Context::caloTransEta() { return s_caloTransEta; }

float Context::caloTransAngle() { return s_caloTransAngle; }

double Context::caloMaxEta() { return fw3dlego::xbins_hf[fw3dlego::xbins_hf_n - 1]; }

float Context::mtdEtlR1() { return s_mtdEtlR1; }
float Context::mtdEtlR2() { return s_mtdEtlR2; }
float Context::mtdEtlZ1(const unsigned int& disk_number) {
  return disk_number == 2 ? s_mtdEtlZ1 + s_mtdEtlOffZ : s_mtdEtlZ1;
}
float Context::mtdEtlZ2(const unsigned int& disk_number) {
  return disk_number == 2 ? s_mtdEtlZ2 + s_mtdEtlOffZ : s_mtdEtlZ2;
}

Context* Context::getInstance() { return s_fwContext; }