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// -*- C++ -*-
//
// Package:     Core
// Class  :     FWEveViewManager
// 
// Implementation:
//     [Notes on implementation]
//
// Original Author:  Chris Jones, Alja Mrak-Tadel
//         Created:  Thu Mar 18 14:11:32 CET 2010
// $Id: FWEveViewManager.cc,v 1.45 2011/03/14 17:57:29 amraktad Exp $
//

// system include files

// user include files
#include "TEveManager.h"
#include "TEveSelection.h"
#include "TEveScene.h"
#include "TEveViewer.h"
#include "TEveCalo.h"
#include "TGLViewer.h"

#include "Fireworks/Core/interface/FWEveViewManager.h"
#include "Fireworks/Core/interface/FWSelectionManager.h"
#include "Fireworks/Core/interface/FWColorManager.h"
#include "Fireworks/Core/interface/Context.h"
#include "Fireworks/Core/interface/FWInteractionList.h"
#include "Fireworks/Core/interface/CmsShowCommon.h"
#include "Fireworks/Core/interface/fwLog.h"

// PB
#include "Fireworks/Core/interface/FWEDProductRepresentationChecker.h"
#include "Fireworks/Core/interface/FWSimpleRepresentationChecker.h"
#include "Fireworks/Core/interface/FWTypeToRepresentations.h"
#include "Fireworks/Core/interface/FWEventItem.h"
#include "Fireworks/Core/interface/FWProxyBuilderFactory.h"

// viewes
#include "Fireworks/Core/interface/FWGUIManager.h"
#include "Fireworks/Core/interface/FWISpyView.h"
#include "Fireworks/Core/interface/FW3DView.h"
#include "Fireworks/Core/interface/FWGlimpseView.h"
#include "Fireworks/Core/interface/FWEveLegoView.h"
#include "Fireworks/Core/interface/FWHFView.h"
#include "Fireworks/Core/interface/FWRPZView.h"

#include <boost/bind.hpp>

class FWViewContext;

// sentry class block TEveSelection signals when call TEveSelection::Remove/AddElement and
// when process its callbacks
class EveSelectionSentry {
public:
   EveSelectionSentry()
   {
      m_blocked = gEve->GetSelection()->BlockSignals(true);
   }
   ~EveSelectionSentry()
   {
     gEve->GetSelection()->BlockSignals(m_blocked);
   }
private:
   bool m_blocked;
};

//
//
// constants, enums and typedefs
//
//
// constructors and destructor
//
FWEveViewManager::FWEveViewManager(FWGUIManager* iGUIMgr) :
   FWViewManagerBase()
{
     
   // builders
   std::set<std::string> builders;
   
   std::vector<edmplugin::PluginInfo> available = FWProxyBuilderFactory::get()->available();
   std::transform(available.begin(),
                  available.end(),
                  std::inserter(builders,builders.begin()),
                  boost::bind(&edmplugin::PluginInfo::name_,_1));
   
   if(edmplugin::PluginManager::get()->categoryToInfos().end()!=edmplugin::PluginManager::get()->categoryToInfos().find(FWProxyBuilderFactory::get()->category())) {
      available = edmplugin::PluginManager::get()->categoryToInfos().find(FWProxyBuilderFactory::get()->category())->second;
      std::transform(available.begin(),
                     available.end(),
                     std::inserter(builders,builders.begin()),
                     boost::bind(&edmplugin::PluginInfo::name_,_1));
   }
   
   
   for(std::set<std::string>::iterator it = builders.begin(), itEnd=builders.end();
       it!=itEnd;
       ++it) {
      std::string::size_type first = it->find_first_of('@')+1;
      std::string purpose = it->substr(first,it->find_last_of('@')-first);
      
      first = it->find_last_of('@')+1;
      std::string view_str =  it->substr(first,it->find_last_of('#')-first);
      int viewTypes = atoi(view_str.c_str());
      std::string fullName = *it;
      m_typeToBuilder[purpose].push_back(BuilderInfo(*it, viewTypes));
   }
   
   
   m_views.resize(FWViewType::kTypeSize); 
   
   
   // view construction called via GUI mng
   FWGUIManager::ViewBuildFunctor f =  boost::bind(&FWEveViewManager::buildView, this, _1, _2);
   for (int i = 0; i < FWViewType::kTypeSize; i++)
   {
      if ( i == FWViewType::kTable || i == FWViewType::kTableHLT || i == FWViewType::kTableL1)
         continue;
      iGUIMgr->registerViewBuilder(FWViewType::idToName(i), f);
   }
   
   // signal
   gEve->GetHighlight()->SetPickToSelect(TEveSelection::kPS_Master);
   TEveSelection* eveSelection = gEve->GetSelection();
   eveSelection->SetPickToSelect(TEveSelection::kPS_Master);  
   eveSelection->Connect("SelectionAdded(TEveElement*)","FWEveViewManager",this,"selectionAdded(TEveElement*)");
   eveSelection->Connect("SelectionRepeated(TEveElement*)","FWEveViewManager",this,"selectionAdded(TEveElement*)");
   eveSelection->Connect("SelectionRemoved(TEveElement*)","FWEveViewManager",this,"selectionRemoved(TEveElement*)");
   eveSelection->Connect("SelectionCleared()","FWEveViewManager",this,"selectionCleared()");

   gEve->GetHighlight()->Connect("SelectionAdded(TEveElement*)","FWEveViewManager",this,"highlightAdded(TEveElement*)");
   gEve->GetHighlight()->Connect("SelectionRepeated(TEveElement*)","FWEveViewManager",this,"highlightAdded(TEveElement*)");
}

FWEveViewManager::~FWEveViewManager()
{
}

//
// member functions
//

//______________________________________________________________________________

void
addElements(const FWEventItem *item, FWEveView *view, 
            int viewType, TEveElementList* product)
{
   if (FWViewType::isProjected(viewType))
   {
      FWRPZView* rpzView = dynamic_cast<FWRPZView*>(view);
      assert(rpzView);
      rpzView->importElements(product, item->layer(), rpzView->eventScene());
   }
   else
   {
      view->eventScene()->AddElement(product);
   }
}

void
FWEveViewManager::newItem(const FWEventItem* iItem)
{
   TypeToBuilder::iterator itFind = m_typeToBuilder.find(iItem->purpose());
   
   if (itFind == m_typeToBuilder.end())
      return;

   std::vector<BuilderInfo>& blist = itFind->second;

   for (size_t bii = 0, bie = blist.size(); bii != bie; ++bii)
   {
      // 1.
      BuilderInfo &info = blist[bii];
      std::string builderName = info.m_name;
      int builderViewBit =  info.m_viewBit;
      
      FWProxyBuilderBase* builder = 0;
      try
      {
         builder = FWProxyBuilderFactory::get()->create(builderName);

      }
      catch (std::exception& exc)
      {
         fwLog(fwlog::kWarning) << "FWEveViewManager::newItem ignoring the following exception (probably edmplugincache mismatch):"
                                << std::endl << exc.what();
      }
      if (!builder)
         continue;

      // 2.
      // printf("FWEveViewManager::makeProxyBuilderFor NEW builder %s \n", builderName.c_str());
      
      boost::shared_ptr<FWProxyBuilderBase> pB(builder);
      builder->setItem(iItem);
      iItem->changed_.connect(boost::bind(&FWEveViewManager::modelChanges,this,_1));
      iItem->goingToBeDestroyed_.connect(boost::bind(&FWEveViewManager::removeItem,this,_1));
      iItem->itemChanged_.connect(boost::bind(&FWEveViewManager::itemChanged,this,_1));

      // 3.
      // This calud be opaque to the user. I would pass a reference to the m_interactionLists to
      // FWProxyBuilderBase::setInteractionList and handle different case differently.
      if (builder->willHandleInteraction() == false)
      {
         typedef std::map<const FWEventItem*, FWInteractionList*>::iterator Iterator;
         std::pair<Iterator, bool> t = m_interactionLists.insert(std::make_pair(iItem,
                                                                                (FWInteractionList*)0));

         if (t.second == true)
            t.first->second = new FWInteractionList(iItem);
         //  printf(">>> builder %s add list %p \n", iItem->name().c_str(), il); fflush(stdout);
         builder->setInteractionList(t.first->second, iItem->purpose());
      }
      
      builder->setHaveWindow(haveViewForBit(builderViewBit));
      
      // 4.
      for (size_t viewType = 0; viewType < FWViewType::kTypeSize; ++viewType)
      {
         if (((1 << viewType) & builderViewBit) == 0)
            continue;
         
         FWViewType::EType type = (FWViewType::EType) viewType;
         
         // printf("%s builder %s supportsd view %s \n",  iItem->name().c_str(), builderName.c_str(), FWViewType::idToName(viewType).c_str());
         if (builder->havePerViewProduct((FWViewType::EType) viewType))
         { 
            for (size_t i = 0, e = m_views[viewType].size(); i != e; ++i)
            {
               FWEveView *view = m_views[viewType][i].get();
               TEveElementList* product = builder->createProduct(type, 
                                                                 view->viewContext());
               addElements(iItem, view, viewType, product);
            }
         }
         else 
         {
            TEveElementList* product = builder->createProduct(type, 0);
         
            for (size_t i = 0, e = m_views[viewType].size(); i != e; ++i)
               addElements(iItem, m_views[viewType][i].get(), viewType, product);
         }
      }
      
      m_builders[builderViewBit].push_back(pB);
   } // loop views
}

//______________________________________________________________________________
FWViewBase*
FWEveViewManager::buildView(TEveWindowSlot* iParent, const std::string& viewName)
{
   FWViewType::EType type = FWViewType::kTypeSize;
   for (int i = 0; i < FWViewType::kTypeSize; ++i)
   {
      if (viewName == FWViewType::idToName(i))
      {
         type = FWViewType::EType(i);
         break;
      }
   }

   boost::shared_ptr<FWEveView> view;
   switch(type)
   {
      case FWViewType::k3D:
         view.reset(new FW3DView(iParent, type));
         break;
      case FWViewType::kISpy:
         view.reset(new FWISpyView(iParent, type));
         break;
      case FWViewType::kRhoPhi:
      case FWViewType::kRhoZ:
      case FWViewType::kRhoPhiPF:
         view.reset(new FWRPZView(iParent, type));
         break;
      case FWViewType::kLego:
      case FWViewType::kLegoPFECAL:
         view.reset(new FWEveLegoView(iParent, type));
         break;
      case FWViewType::kLegoHF:
         view.reset(new FWHFView(iParent, type));
         break;
      case FWViewType::kGlimpse:
         view.reset(new FWGlimpseView(iParent, type));
         break;
      default:
         break;
   }

   m_views[type].push_back(boost::shared_ptr<FWEveView> (view));
   return finishViewCreate(m_views[type].back());
}

FWEveView*
FWEveViewManager::finishViewCreate(boost::shared_ptr<FWEveView> view)
{
   // printf("new view %s added \n", view->typeName().c_str());
   gEve->DisableRedraw();

   // set geometry and calo data
   view->setContext(context()); 

   FWColorManager::setColorSetViewer(view->viewerGL(),  context().colorManager()->background());

   // set proxies have a window falg
   int viewerBit = 1 << view->typeId();   
   if (m_views[view->typeId()].size() == 1)
   {
      for ( std::map<int, BuilderVec>::iterator i = m_builders.begin(); i!=  m_builders.end(); ++i)
      {
         int builderViewBit = i->first;
         BuilderVec& bv =  i->second;
         if (viewerBit == (builderViewBit & viewerBit))
         {
            for(BuilderVec_it bIt = bv.begin(); bIt != bv.end(); ++bIt)
            {
               (*bIt)->setHaveWindow(true);
            }
         }
      }
   }
    
   FWRPZView* rpzView = dynamic_cast<FWRPZView*>(view.get());
   for ( std::map<int, BuilderVec>::iterator i = m_builders.begin(); i!=  m_builders.end(); ++i)
   {
      int builderViewBit = i->first;
      BuilderVec& bv =  i->second;
      if (viewerBit == (builderViewBit & viewerBit))
      { 
         for(BuilderVec_it bIt = bv.begin(); bIt != bv.end(); ++bIt)
         {
            // it is ok to call create even for shared productsm since
            // builder map key garanties that
            TEveElementList* product = (*bIt)->createProduct(view->typeId(), view->viewContext());

            if ((*bIt)->havePerViewProduct((FWViewType::EType)view->typeId()))
            {
               // view owned
               (*bIt)->build();
               if (rpzView)
               {
                  rpzView->importElements(product, (*bIt)->item()->layer(), rpzView->ownedProducts());
               }
               else
               {
                  view->ownedProducts()->AddElement(product);
               }
            }
            else
            {
               // shared
               if (rpzView)
               {
                  rpzView->importElements(product, (*bIt)->item()->layer(), rpzView->eventScene());
               }
               else
               {
                  view->eventScene()->AddElement(product);
               }
                 
            }
         }
      }
   }

   view->beingDestroyed_.connect(boost::bind(&FWEveViewManager::beingDestroyed,this,_1));

   view->setupEnergyScale(); // notify PB for energy scale

   gEve->EnableRedraw();
   view->viewerGL()->UpdateScene();
   gEve->Redraw3D();   

   return view.get();
}

void
FWEveViewManager::beingDestroyed(const FWViewBase* vb)
{
   FWEveView* view = (FWEveView*) vb;
   int typeId = view->typeId();
  
   int viewerBit = 1 << typeId;
   int nviews = m_views[typeId].size(); 
   for ( std::map<int, BuilderVec>::iterator i = m_builders.begin(); i!= m_builders.end(); ++i)
   {
      int builderBit = i->first;
      if (viewerBit == (builderBit & viewerBit)) // check only in case if connected
      {
         BuilderVec& bv =  i->second;

         // remove view-owned product
         if (viewerBit == (builderBit & viewerBit))
         {
            for(BuilderVec_it bIt = bv.begin(); bIt != bv.end(); ++bIt)
               (*bIt)->removePerViewProduct(view->typeId(), view->viewContext());
         }

         // and setup proxy builders have-a-window flag
         if (nviews == 1)
         {
            if (!haveViewForBit(builderBit))
            {
               if (viewerBit == (builderBit & viewerBit))
               {
                  for(BuilderVec_it bIt = bv.begin(); bIt != bv.end(); ++bIt)
                     (*bIt)->setHaveWindow(false);
               }
            }
         }
      }
   }
  

   for(EveViewVec_it i= m_views[typeId].begin(); i != m_views[typeId].end(); ++i) {
      if(i->get() == vb) {
         m_views[typeId].erase(i);
         break;
      }
   }
}

//______________________________________________________________________________

void
FWEveViewManager::modelChangesComing()
{
   gEve->DisableRedraw();
}

void
FWEveViewManager::modelChangesDone()
{
   gEve->EnableRedraw();
}

void
FWEveViewManager::modelChanges(const FWModelIds& iIds)
{
   FWModelId id = *(iIds.begin());
   const FWEventItem* item = id.item();

   // in standard case new elements can be build in case of change of visibility
   // and in non-standard case (e.g. calo towers) PB's modelChages handles all changes
   bool itemHaveWindow = false;
   for (std::map<int, BuilderVec>::iterator i = m_builders.begin(); 
        i != m_builders.end(); ++i)
   {
      for (size_t bi = 0, be = i->second.size(); bi != be; ++bi)
      {
         FWProxyBuilderBase *builder = i->second[bi].get();
         if (builder->getHaveWindow() && builder->item() == item)
         {
            builder->modelChanges(iIds);
            itemHaveWindow = true;
         }
      }
   }

   if (!itemHaveWindow)
      return;

   EveSelectionSentry();

   std::map<const FWEventItem*, FWInteractionList*>::iterator it = m_interactionLists.find(item);
   if (it != m_interactionLists.end())
   {
      if (!it->second->empty())
         it->second->modelChanges(iIds);
   }
}

void
FWEveViewManager::itemChanged(const FWEventItem* item)
{
   if (!item)
      return;

   bool itemHaveWindow = false;

   for (std::map<int, BuilderVec>::iterator i = m_builders.begin(); 
        i != m_builders.end(); ++i)
   {
      for(size_t bi = 0, be = i->second.size(); bi != be; ++bi)
      {
         FWProxyBuilderBase *builder = i->second[bi].get();
         
         if (builder->item() != item)
            continue;

         builder->itemChanged(item);
         itemHaveWindow |= builder->getHaveWindow();
      }
   }
   
   if (!itemHaveWindow)
      return;

   std::map<const FWEventItem*, FWInteractionList*>::iterator it = m_interactionLists.find(item);
   if (it != m_interactionLists.end())
   {
      if (!it->second->empty())
         it->second->itemChanged();
   }
}

void
FWEveViewManager::removeItem(const FWEventItem* item)
{
   EveSelectionSentry();

   std::map<const FWEventItem*, FWInteractionList*>::iterator it =  m_interactionLists.find(item);
   if (it != m_interactionLists.end())
   {
      delete it->second;
      m_interactionLists.erase(it);
   }
  
   for (std::map<int, BuilderVec>::iterator i = m_builders.begin();
        i != m_builders.end(); ++i)
   {
      BuilderVec_it bIt = i->second.begin();
      while( bIt != i->second.end() )
      {
         if ((*bIt)->item() == item)
         { 
            // TODO caching of proxy builders
            (*bIt)->itemBeingDestroyed(item);
            bIt = i->second.erase(bIt);
         }
         else
         {
            ++bIt;
         }
      }
   }
}

void
FWEveViewManager::setContext(const fireworks::Context* x)
{
   FWViewManagerBase::setContext(x);
   x->commonPrefs()->getEnergyScale()->parameterChanged_.connect(boost::bind(&FWEveViewManager::globalEnergyScaleChanged,this));

}

void
FWEveViewManager::globalEnergyScaleChanged()
{
   for (int t = 0 ; t < FWViewType::kTypeSize; ++t)
   {
      for(EveViewVec_it i = m_views[t].begin(); i != m_views[t].end(); ++i) 
      {
         if ((*i)->isEnergyScaleGlobal())
         {
            (*i)->setupEnergyScale();
         }
      }

   }
}

void
FWEveViewManager::colorsChanged()
{
   for (int t = 0 ; t < FWViewType::kTypeSize; ++t)
   {
      for(EveViewVec_it i = m_views[t].begin(); i != m_views[t].end(); ++i) 
         (*i)->setBackgroundColor(colorManager().background());
   }
}

//______________________________________________________________________________
void
FWEveViewManager::eventBegin()
{
   gEve->DisableRedraw();

   context().resetMaxEtAndEnergy();

   for (int t = 0 ; t < FWViewType::kTypeSize; ++t)
   {
      for(EveViewVec_it i = m_views[t].begin(); i != m_views[t].end(); ++i)   
         (*i)->eventBegin();
   }
}

void
FWEveViewManager::eventEnd()
{
   for (int t = 0 ; t < FWViewType::kTypeSize; ++t)
   {
      for(EveViewVec_it i = m_views[t].begin(); i != m_views[t].end(); ++i)   
         (*i)->eventEnd();
   }
   gEve->EnableRedraw();
}

//______________________________________________________________________________

FWFromEveSelectorBase *getSelector(TEveElement *iElement)
{
   if (!iElement)
      return 0;

   //std::cout <<"  non null"<<std::endl;
   void* userData = iElement->GetUserData();
   //std::cout <<"  user data "<<userData<<std::endl;
   if (!userData)
      return 0;

   //std::cout <<"    have userData"<<std::endl;
   //std::cout <<"      calo"<<std::endl;
   EveSelectionSentry();
   return reinterpret_cast<FWFromEveSelectorBase*> (userData);   
}

void
FWEveViewManager::selectionAdded(TEveElement* iElement)
{
   FWFromEveSelectorBase* selector = getSelector(iElement);
   if (selector)
      selector->doSelect();
}

void
FWEveViewManager::selectionRemoved(TEveElement* iElement)
{
   FWFromEveSelectorBase* selector = getSelector(iElement);
   if (selector)
      selector->doUnselect();
}

void
FWEveViewManager::selectionCleared()
{
   context().selectionManager()->clearSelection();
}


//
// const member functions
//

FWTypeToRepresentations
FWEveViewManager::supportedTypesAndRepresentations() const
{
   // needed for add collection GUI
   FWTypeToRepresentations returnValue;
   const std::string kSimple("simple#");
   for(TypeToBuilder::const_iterator it = m_typeToBuilder.begin(), itEnd = m_typeToBuilder.end();
       it != itEnd;
       ++it) 
   {
      std::vector<BuilderInfo> blist = it->second;
      for (size_t bii = 0, bie = blist.size(); bii != bie; ++bii)
      {
         BuilderInfo &info = blist[bii];
         std::string name = info.m_name;
         unsigned int bitPackedViews = info.m_viewBit;
         bool representsSubPart = (name.substr(name.find_first_of('@')-1, 1)=="!");
     
         if(name.substr(0,kSimple.size()) == kSimple)
         {
            name = name.substr(kSimple.size(), name.find_first_of('@')-kSimple.size()-1);
            returnValue.add(boost::shared_ptr<FWRepresentationCheckerBase>(new FWSimpleRepresentationChecker(name, it->first,bitPackedViews,representsSubPart)) );
         }
         else
         {
            name = name.substr(0, name.find_first_of('@')-1);
            returnValue.add(boost::shared_ptr<FWRepresentationCheckerBase>(new FWEDProductRepresentationChecker(name, it->first,bitPackedViews,representsSubPart)) );
         }
      }
   }
   return returnValue;
}


bool
FWEveViewManager::haveViewForBit(int bit) const
{
   for (int t = 0; t < FWViewType::kTypeSize; ++t)
   {
      if ((bit & (1 << t)) && m_views[t].size())
         return true;
   }
   // printf("have %d view for bit %d \n", haveView, bit);
   return false;
}


/*
AMT: temporary workaround for using TEveCaloDataHist instead of
TEveCaloDataVec. 

 */

#include "TH2F.h"
#include "TAxis.h"
#include "TEveCaloData.h"

void
FWEveViewManager::highlightAdded(TEveElement* iElement)
{

   bool blocked = gEve->GetHighlight()->BlockSignals(true);


   if (iElement == context().getCaloData())
   {
      TEveCaloData::vCellId_t& hlist =  context().getCaloData()->GetCellsHighlighted();
      std::set<TEveCaloData::CellId_t> hset;

      int etaBin, phiBin, w, newPhiBin, tower;
      TH2F* hist =  context().getCaloData()->GetHist(0);
      TAxis* etaAxis = hist->GetXaxis();
      int nBinsX = etaAxis->GetNbins() + 2;

      for (TEveCaloData::vCellId_i i = hlist.begin(); i != hlist.end(); ++i)
      {
         hist->GetBinXYZ((*i).fTower, etaBin, phiBin, w);
         if (TMath::Abs(etaAxis->GetBinCenter(etaBin)) > 4.71475)
         {
            newPhiBin = ((phiBin + 1) / 4) * 4 - 1;
            if (newPhiBin <= 0) newPhiBin = 71;
               
            tower = etaBin + newPhiBin*nBinsX;
            hset.insert(TEveCaloData::CellId_t( tower, (*i).fSlice, (*i).fFraction));
            tower += nBinsX;
            hset.insert(TEveCaloData::CellId_t(tower, (*i).fSlice, (*i).fFraction));
            tower += nBinsX;

            if (newPhiBin == 71)
               tower = etaBin + 1*nBinsX;

            hset.insert(TEveCaloData::CellId_t(tower, (*i).fSlice, (*i).fFraction));
            tower += nBinsX;
            hset.insert(TEveCaloData::CellId_t(tower, (*i).fSlice, (*i).fFraction));
         }
         else if (TMath::Abs(etaAxis->GetBinCenter(etaBin)) > 1.747650)
         {  
            newPhiBin =  ((phiBin + 1)/2)*2 - 1;
            tower = etaBin + newPhiBin*nBinsX;
            hset.insert(TEveCaloData::CellId_t( tower, (*i).fSlice, (*i).fFraction));
            tower += nBinsX;
            hset.insert(TEveCaloData::CellId_t(tower, (*i).fSlice, (*i).fFraction));
         }
         else
         {
            hset.insert(*i);
         }
      }
 
      // edit calo data list
      hlist.clear();
      for(std::set<TEveCaloData::CellId_t>::iterator it = hset.begin(); it != hset.end(); ++it)
      {
         hlist.push_back(*it);
      }    
      context().getCaloData()->CellSelectionChanged();

   }

   gEve->GetHighlight()->BlockSignals(blocked);
}