#include "DQM/SiStripMonitorClient/interface/SiStripHistoPlotter.h"
#include "DQM/SiStripMonitorClient/interface/SiStripUtility.h"
#include "DQMServices/Core/interface/DQMStore.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "FWCore/ParameterSet/interface/FileInPath.h"

#include "TText.h"
#include "TROOT.h"
#include "TPad.h"
#include "TSystem.h"
#include "TString.h"
#include "TImage.h"
#include "TPaveText.h"
#include "TImageDump.h"
#include "TAxis.h"
#include "TStyle.h"
#include "TPaveLabel.h"
#include "TH1F.h"
#include "TH2F.h"
#include "TProfile.h"
#include <iostream>
//
// -- Constructor
//
SiStripHistoPlotter::SiStripHistoPlotter() {
  edm::LogInfo("SiStripHistoPlotter") << " Creating SiStripHistoPlotter "
                                      << "\n";
}
//
// --  Destructor
//
SiStripHistoPlotter::~SiStripHistoPlotter() {
  edm::LogInfo("SiStripHistoPlotter") << " Deleting SiStripHistoPlotter "
                                      << "\n";
}
//
// -- Set New Plot
//
void SiStripHistoPlotter::setNewPlot(std::string const& path,
                                     std::string const& option,
                                     int const width,
                                     int const height) {
  std::string name = "Dummy";
  if (!hasNamedImage(name))
    createDummyImage(name);
  PlotParameter local_par{path, option, width, height};
  plotList_.push_back(std::move(local_par));
}
//
// -- Create Plots
//
void SiStripHistoPlotter::createPlots(DQMStore* dqm_store) {
  if (plotList_.empty())
    return;
  std::string name = "Dummy";
  if (!hasNamedImage(name))
    createDummyImage(name);
  for (auto const& par : plotList_) {
    makePlot(dqm_store, par);
  }
  plotList_.clear();
}
//
// -- Draw Histograms
//
void SiStripHistoPlotter::makePlot(DQMStore const* dqm_store, const PlotParameter& par) {
  TCanvas* canvas = new TCanvas("TKCanvas", "TKCanvas", par.CWidth, par.CHeight);

  MonitorElement* me = dqm_store->get(par.Path);
  if (me) {
    int istat = SiStripUtility::getMEStatus(me);

    std::string dopt = par.Option;
    std::string tag;
    int icol;
    SiStripUtility::getMEStatusColor(istat, icol, tag);
    if (me->kind() == MonitorElement::Kind::TH1F || me->kind() == MonitorElement::Kind::TH2F ||
        me->kind() == MonitorElement::Kind::TPROFILE || me->kind() == MonitorElement::Kind::TPROFILE2D) {
      TH1* histo = me->getTH1();
      TH1F* tproject = nullptr;
      if (dopt == "projection") {
        getProjection(me, tproject);
        if (tproject)
          tproject->Draw();
        else
          histo->Draw();
      } else {
        dopt = "";
        std::string name = histo->GetName();
        if (me->kind() == MonitorElement::Kind::TPROFILE2D) {
          dopt = "colz";
          histo->SetStats(kFALSE);
        } else {
          if (name.find("Summary_Mean") != std::string::npos) {
            histo->SetStats(kFALSE);
          } else {
            histo->SetFillColor(1);
          }
        }
        histo->Draw(dopt.c_str());
      }
    }
    TText tTitle;
    tTitle.SetTextFont(64);
    tTitle.SetTextSizePixels(20);
    //    tTitle.DrawTextNDC(0.1, 0.92, histo->GetName());

    if (icol != 1) {
      TText tt;
      tt.SetTextSize(0.12);
      tt.SetTextColor(icol);
      tt.DrawTextNDC(0.5, 0.5, tag.c_str());
    }
    fillNamedImageBuffer(canvas, par.Path);
    canvas->Clear();
  }
  delete canvas;
}
//
// -- Get Named Image buffer
//
void SiStripHistoPlotter::getNamedImageBuffer(const std::string& path, std::string& image) {
  std::map<std::string, std::string>::iterator cPos;
  if (path == "dummy_path") {
    std::cout << " Sending Dummy Image for : " << path << std::endl;
    cPos = namedPictureBuffer_.find("Dummy");
    image = cPos->second;
  } else {
    cPos = namedPictureBuffer_.find(path);
    if (cPos != namedPictureBuffer_.end()) {
      image = cPos->second;
      if (namedPictureBuffer_.size() > 99)
        namedPictureBuffer_.erase(cPos);
    } else {
      std::cout << " Sending Dummy Image for : " << path << std::endl;
      cPos = namedPictureBuffer_.find("Dummy");
      image = cPos->second;
    }
  }
}
/*! \brief (Documentation under construction).
 *
 *  This method
 */
void SiStripHistoPlotter::fillNamedImageBuffer(TCanvas* c1, const std::string& name) {
  //  DQMScope enter;
  // Now extract the image
  // 114 - stands for "no write on Close"
  //   std::cout << ACYellow << ACBold
  //        << "[SiPixelInformationExtractor::fillNamedImageBuffer()] "
  //        << ACPlain
  //        << "A canvas: "
  //        << c1->GetName()
  //        << std::endl ;
  c1->Update();
  c1->Modified();
  TImageDump imgdump("tmp.png", 114);
  c1->Paint();

  // get an internal image which will be automatically deleted
  // in the imgdump destructor
  TImage* image = imgdump.GetImage();

  if (image == nullptr) {
    std::cout << "No TImage found for " << name << std::endl;
    return;
  }
  char* buf;
  int sz = 0;
  image->GetImageBuffer(&buf, &sz);

  std::ostringstream local_str;
  for (int i = 0; i < sz; i++)
    local_str << buf[i];

  //  delete [] buf;
  ::free(buf);  // buf is allocated via realloc() by a C language AfterStep library invoked by the
                // default (and so far only) TImage implementation in root, TASImage.

  // clear the first element map if # of entries > 30
  if (hasNamedImage(name))
    namedPictureBuffer_.erase(name);
  namedPictureBuffer_[name] = local_str.str();
  //  if (namedPictureBuffer_[name].size() > 0) std::cout << "image created " << name << std::endl;
}
//
// -- Check if the image exists
//
bool SiStripHistoPlotter::hasNamedImage(const std::string& name) {
  std::map<std::string, std::string>::const_iterator cPos = namedPictureBuffer_.find(name);
  if (cPos == namedPictureBuffer_.end()) {
    return false;
  } else
    return true;
}
//
// -- Create Dummy Image
//
void SiStripHistoPlotter::createDummyImage(const std::string& name) {
  std::string image;
  getDummyImage(image);
  namedPictureBuffer_.insert(std::pair<std::string, std::string>(name, image));
}
//
// -- Get Image reading a disk resident image
//
void SiStripHistoPlotter::getDummyImage(std::string& image) {
  std::string line;
  std::ostringstream local_str;
  // Read back the file line by line and temporarily store it in a stringstream
  std::string localPath = std::string("DQM/TrackerCommon/test/images/EmptyPlot.png");
  std::ifstream* imagefile = new std::ifstream((edm::FileInPath(localPath).fullPath()).c_str(), std::ios::in);
  if (imagefile->is_open()) {
    while (getline(*imagefile, line)) {
      local_str << line << std::endl;
    }
  }
  imagefile->close();
  image = local_str.str();
}
// -- Set Drawing Option
//
void SiStripHistoPlotter::setDrawingOption(TH1* hist) {
  if (!hist)
    return;

  TAxis* xa = hist->GetXaxis();
  TAxis* ya = hist->GetYaxis();

  xa->SetTitleOffset(0.7);
  xa->SetTitleSize(0.05);
  xa->SetLabelSize(0.04);

  ya->SetTitleOffset(0.7);
  ya->SetTitleSize(0.05);
  ya->SetLabelSize(0.04);
}
// -- Get Projection Histogram
//
void SiStripHistoPlotter::getProjection(MonitorElement* me, TH1F* tp) {
  std::string ptit = me->getTitle();
  ptit += "-Yprojection";

  if (me->kind() == MonitorElement::Kind::TH2F) {
    TH2F* hist2 = me->getTH2F();
    tp = new TH1F(
        ptit.c_str(), ptit.c_str(), hist2->GetNbinsY(), hist2->GetYaxis()->GetXmin(), hist2->GetYaxis()->GetXmax());
    tp->GetXaxis()->SetTitle(ptit.c_str());
    for (int j = 1; j < hist2->GetNbinsY() + 1; j++) {
      float tot_count = 0.0;
      for (int i = 1; i < hist2->GetNbinsX() + 1; i++) {
        tot_count += hist2->GetBinContent(i, j);
      }
      tp->SetBinContent(j, tot_count);
    }
  } else if (me->kind() == MonitorElement::Kind::TPROFILE) {
    TProfile* prof = me->getTProfile();
    tp = new TH1F(ptit.c_str(), ptit.c_str(), 100, 0.0, prof->GetMaximum() * 1.2);
    tp->GetXaxis()->SetTitle(ptit.c_str());
    for (int i = 1; i < prof->GetNbinsX() + 1; i++) {
      tp->Fill(prof->GetBinContent(i));
    }
  } else if (me->kind() == MonitorElement::Kind::TH1F) {
    TH1F* hist1 = me->getTH1F();
    tp = new TH1F(ptit.c_str(), ptit.c_str(), 100, 0.0, hist1->GetMaximum() * 1.2);
    tp->GetXaxis()->SetTitle(ptit.c_str());
    for (int i = 1; i < hist1->GetNbinsX() + 1; i++) {
      tp->Fill(hist1->GetBinContent(i));
    }
  }
}
//
// -- Set New CondDB Plot
//
void SiStripHistoPlotter::setNewCondDBPlot(std::string const& path,
                                           std::string const& option,
                                           int const width,
                                           int const height) {
  PlotParameter local_par{path, option, width, height};
  condDBPlotList_.push_back(std::move(local_par));
}
//
// -- Create CondDB Plots
//
void SiStripHistoPlotter::createCondDBPlots(DQMStore* dqm_store) {
  if (condDBPlotList_.empty())
    return;
  std::string name = "Dummy";
  if (!hasNamedImage(name))
    createDummyImage(name);

  for (std::vector<PlotParameter>::iterator it = condDBPlotList_.begin(); it != condDBPlotList_.end(); it++) {
    makeCondDBPlots(dqm_store, (*it));
  }
  condDBPlotList_.clear();
}
//
// -- Draw CondDB Histograms
//
void SiStripHistoPlotter::makeCondDBPlots(DQMStore* dqm_store, const PlotParameter& par) {
  TCanvas* canvas = new TCanvas("TKCanvas", "TKCanvas", par.CWidth, par.CHeight);

  std::vector<std::string> htypes;
  std::string option = par.Option;
  SiStripUtility::split(option, htypes, ",");

  std::string tag;
  std::vector<MonitorElement*> all_mes = dqm_store->getContents(par.Path);

  for (std::vector<std::string>::const_iterator ih = htypes.begin(); ih != htypes.end(); ih++) {
    const std::string& type = (*ih);
    if (type.empty())
      continue;
    std::string tag = par.Path + "/";
    for (std::vector<MonitorElement*>::const_iterator it = all_mes.begin(); it != all_mes.end(); it++) {
      MonitorElement* me = (*it);
      if (!me)
        continue;
      std::string hname = me->getName();
      if (hname.find(type) != std::string::npos) {
        TH1* histo = me->getTH1();
        histo->Draw();
        tag += type;
        fillNamedImageBuffer(canvas, tag);
        canvas->Clear();
      }
    }
  }
  delete canvas;
}