// Copyright (C) 2010, Guy Barrand. All rights reserved.
// See the file tools.license for terms.

#ifndef tools_xml_aidas
#define tools_xml_aidas

#include "../raxml_out"

#include "../sprintf"
#include "../histo/h1d"
#include "../histo/h2d"
#include "../histo/h3d"
#include "../histo/p1d"
#include "../histo/p2d"
#include "../histo/c1d"
#include "../histo/c2d"
#include "../histo/c3d"
#include "../histo/dps"
#include "../aida_ntuple"
#include "../S_STRING"
#include "../forit"

#include "tree"

#include <vector>
#include <map>
#include <utility>

namespace tools {
namespace xml {

class aidas {
public:
  //tree,out,verbose,path.
  typedef raxml_out (*reader)(tree&,std::ostream&,bool,void*);
  typedef std::map<std::string,reader> readers;
public:
  aidas()
  {
    add_default_readers();
  }
  virtual ~aidas(){
    m_objects.clear(); //it may delete histos, etc...
  }
protected:
  aidas(const aidas&){}
  aidas& operator=(const aidas&){return *this;}
public:
  std::vector<raxml_out>& objects() {return m_objects;}
protected:
  void clear_readers() {m_readers.clear();}
  void add_reader(const std::string& a_class,
                         reader a_reader,
                         bool a_check = false){
    if(a_check) {if(find_reader(a_class)) return;}
    m_readers[a_class] = a_reader;
  }

  reader find_reader(const std::string& a_class) const {
    std::map<std::string,reader>::const_iterator it = m_readers.find(a_class);
    if(it!=m_readers.end()) return (*it).second;
    return 0;
  }

protected:
  TOOLS_CLASS_STRING(aida)

  TOOLS_CLASS_STRING(annotation)
  TOOLS_CLASS_STRING(histogram1d)
  TOOLS_CLASS_STRING(histogram2d)
  TOOLS_CLASS_STRING(histogram3d)
  TOOLS_CLASS_STRING(profile1d)
  TOOLS_CLASS_STRING(profile2d)
  TOOLS_CLASS_STRING(axis)
  TOOLS_CLASS_STRING(statistics)
  TOOLS_CLASS_STRING(statistic)
  TOOLS_CLASS_STRING(data1d)
  TOOLS_CLASS_STRING(data2d)
  TOOLS_CLASS_STRING(data3d)
  TOOLS_CLASS_STRING(tuple)
  TOOLS_CLASS_STRING(columns)
  TOOLS_CLASS_STRING(rows)
  TOOLS_CLASS_STRING(row)
  TOOLS_CLASS_STRING(entryITuple)
  TOOLS_CLASS_STRING(entryTuple)
  TOOLS_CLASS_STRING(cloud1d)
  TOOLS_CLASS_STRING(cloud2d)
  TOOLS_CLASS_STRING(cloud3d)
  TOOLS_CLASS_STRING(entries1d)
  TOOLS_CLASS_STRING(entries2d)
  TOOLS_CLASS_STRING(entries3d)
  TOOLS_CLASS_STRING(dataPointSet)
  TOOLS_CLASS_STRING(dataPoint)

  TOOLS_CLASS_STRING(type)
  TOOLS_CLASS_STRING(name)
  TOOLS_CLASS_STRING(path)
  TOOLS_CLASS_STRING(title)
  TOOLS_CLASS_STRING(numberOfBins)
  TOOLS_CLASS_STRING(min)
  TOOLS_CLASS_STRING(max)
  TOOLS_CLASS_STRING(direction)
  TOOLS_CLASS_STRING(value)
  TOOLS_CLASS_STRING(entries)
  TOOLS_CLASS_STRING(mean)
  TOOLS_CLASS_STRING(rms)
  TOOLS_CLASS_STRING(height)
  TOOLS_CLASS_STRING(error)
  TOOLS_CLASS_STRING(weightedMean)
  TOOLS_CLASS_STRING(weightedRms)
  TOOLS_CLASS_STRING(weightedMeanX)
  TOOLS_CLASS_STRING(weightedMeanY)
  TOOLS_CLASS_STRING(weightedMeanZ)
  TOOLS_CLASS_STRING(weightedRmsX)
  TOOLS_CLASS_STRING(weightedRmsY)
  TOOLS_CLASS_STRING(weightedRmsZ)
  TOOLS_CLASS_STRING(booking)
  TOOLS_CLASS_STRING(default)
  TOOLS_CLASS_STRING(entry)
  TOOLS_CLASS_STRING(binBorder)
  TOOLS_CLASS_STRING(maxEntries)
  TOOLS_CLASS_STRING(valueX)
  TOOLS_CLASS_STRING(valueY)
  TOOLS_CLASS_STRING(valueZ)
  TOOLS_CLASS_STRING(weight)
  TOOLS_CLASS_STRING(entry1d)
  TOOLS_CLASS_STRING(entry2d)
  TOOLS_CLASS_STRING(entry3d)
  TOOLS_CLASS_STRING(dimension)
  TOOLS_CLASS_STRING(errorPlus)
  TOOLS_CLASS_STRING(errorMinus)
  TOOLS_CLASS_STRING(measurement)

  void set_default_tags(std::vector<std::string>& a_tags) {
    a_tags.clear();
    a_tags.push_back(s_aida());
    a_tags.push_back(s_annotation());
    a_tags.push_back(s_histogram1d());
    a_tags.push_back(s_histogram2d());
    a_tags.push_back(s_histogram3d());
    a_tags.push_back(s_profile1d());
    a_tags.push_back(s_profile2d());
    a_tags.push_back(s_axis());
    a_tags.push_back(s_statistics());
    a_tags.push_back(s_data1d());
    a_tags.push_back(s_data2d());
    a_tags.push_back(s_data3d());

    a_tags.push_back(s_tuple());
    a_tags.push_back(s_columns());
    a_tags.push_back(s_rows());
    a_tags.push_back(s_row());
    a_tags.push_back(s_entryITuple()); //aida.dtd spec.
    a_tags.push_back(s_entryTuple());  //not in aida.dtd ! Back comp.

    a_tags.push_back(s_cloud1d());
    a_tags.push_back(s_cloud2d());
    a_tags.push_back(s_cloud3d());
    a_tags.push_back(s_entries1d());
    a_tags.push_back(s_entries2d());
    a_tags.push_back(s_entries3d());
    a_tags.push_back(s_dataPointSet());
    a_tags.push_back(s_dataPoint());
  }

  void add_default_readers(){
    add_reader(s_histogram1d(),read_h1d);
    add_reader(s_histogram2d(),read_h2d);
    add_reader(s_histogram3d(),read_h3d);
    add_reader(s_profile1d(),read_p1d);
    add_reader(s_profile2d(),read_p2d);
    add_reader(s_cloud1d(),read_cloud1d);
    add_reader(s_cloud2d(),read_cloud2d);
    add_reader(s_cloud3d(),read_cloud3d);
    add_reader(s_tuple(),read_ntu);
    add_reader(s_dataPointSet(),read_dps);
  }
  static raxml_out read_h1d(tree& a_tree,std::ostream& a_out,bool a_verbose,void*) {
    return read_histo(a_tree,a_out,a_verbose,1,false);
  }
  static raxml_out read_h2d(tree& a_tree,std::ostream& a_out,bool a_verbose,void*) {
    return read_histo(a_tree,a_out,a_verbose,2,false);
  }
  static raxml_out read_h3d(tree& a_tree,std::ostream& a_out,bool a_verbose,void*) {
    return read_histo(a_tree,a_out,a_verbose,3,false);
  }
  static raxml_out read_p1d(tree& a_tree,std::ostream& a_out,bool a_verbose,void*) {
    return read_histo(a_tree,a_out,a_verbose,1,true);
  }
  static raxml_out read_p2d(tree& a_tree,std::ostream& a_out,bool a_verbose,void*) {
    return read_histo(a_tree,a_out,a_verbose,2,true);
  }

  static raxml_out read_cloud1d(tree& a_tree,std::ostream& a_out,bool a_verbose,void*) {
    return read_cloud(a_tree,a_out,a_verbose,1);
  }
  static raxml_out read_cloud2d(tree& a_tree,std::ostream& a_out,bool a_verbose,void*) {
    return read_cloud(a_tree,a_out,a_verbose,2);
  }
  static raxml_out read_cloud3d(tree& a_tree,std::ostream& a_out,bool a_verbose,void*) {
    return read_cloud(a_tree,a_out,a_verbose,3);
  }

  static raxml_out read_dps(tree& a_tree,std::ostream& a_out,bool a_verbose,void*) {
    std::string sname;
    a_tree.attribute_value(s_name(),sname);

    if(a_verbose) {
      a_out << "tools::xml::aidas::read_dps :"
            << " with name " << sout(sname)
            << "..." << std::endl;
    }

    std::string spath;
    a_tree.attribute_value(s_path(),spath);

    std::string stitle;
    a_tree.attribute_value(s_title(),stitle);

    // Booking parameters :
    unsigned int dim = 0;
    if(!a_tree.attribute_value(s_dimension(),dim)) return raxml_out();

    // Create a BatchLab::DataPointSet :
    histo::dps* dps = new histo::dps(stitle,dim);

    // Data sub items :
   {looper _for(a_tree);
    while(tree* _tree = _for.next_tree()) {
      if(!read_dps_data(*_tree,*dps)) {
        delete dps;
        return raxml_out();
      }
    }}

    base_handle* hdl = new handle<histo::dps>(dps);
    std::string sclass = histo::dps::s_class();

    if(a_verbose) {
      a_out << "tools::xml::aidas::read_dps :"
            << " with name " << sout(sname)
            << " and title " << sout(stitle)
            << " done." << std::endl;
    }

    return raxml_out(hdl,sclass,spath,sname);
  }

protected:
  typedef histo::axis<double,unsigned int>::bn_t bn_t;
public: //used in BatchLab::XML_DataReader.
  static raxml_out read_histo(tree& a_tree,
                               std::ostream& a_out,bool a_verbose,
                               unsigned int a_dim,bool a_is_prof){

    std::string sname;
    a_tree.attribute_value(s_name(),sname);

    if(a_verbose) {
      a_out << "tools::xml::aidas::read_histo :"
            << " with name " << sout(sname)
            << "..." << std::endl;
    }

    std::string spath;
    a_tree.attribute_value(s_path(),spath);

    std::string stitle;
    a_tree.attribute_value(s_title(),stitle);

    // Booking parameters :
    std::vector<bn_t> bins(a_dim);
    std::vector<double> mns(a_dim);
    std::vector<double> mxs(a_dim);
    std::vector< std::vector<double> > edges(a_dim);

    // Jump in subitems to find axes items :
    int not_found = -1;
    unsigned int found = 0;
    bool isVariableBins = false;

   {looper _for(a_tree);
    while(tree* _tree = _for.next_tree()) {

      int iaxis;
      bn_t num;
      double mn,mx;
      std::vector<double> borders;
      bool variableBins;
      if(!read_axis(*_tree,a_dim,iaxis,num,mn,mx,borders,variableBins,a_out)) return raxml_out();
      if(iaxis!=not_found) {
        if((iaxis<0)||(iaxis>=(int)a_dim)) return raxml_out();
        bins[iaxis] = num;
        mns[iaxis] = mn;
        mxs[iaxis] = mx;
        edges[iaxis] = std::move(borders);
        if(variableBins) isVariableBins = true;
        found++;
      }
    }}

    if(found!=a_dim) return raxml_out();
    if(isVariableBins) {
      // Axes consistency :
      for(unsigned int iaxis=0;iaxis<a_dim;iaxis++) {
        if(edges[iaxis].size()<=2) return raxml_out();
      }
    }

    // Create a native histogram :

    base_handle* hdl = 0;
    std::string sclass;
    if(a_is_prof) {
      if(a_dim==1) {
        histo::p1d* histo = 0;
        if(isVariableBins) {
          histo = new histo::p1d(stitle,edges[0]);
        } else {
          histo = new histo::p1d(stitle,bins[0],mns[0],mxs[0]);
        }

        // Sub items :
        pd_data hd = histo->get_histo_data();
        if(hd.m_bin_number<=0) {delete histo;return raxml_out();}

       {looper _for(a_tree);
        while(tree* _tree = _for.next_tree()) {

          if(!read_bins(*_tree,hd,a_out,a_is_prof)) {
            delete histo;
            return raxml_out();
          }

        }}

        //give histo ownership to the handle.
        hdl = new handle<histo::p1d>(histo);
        sclass = histo::p1d::s_class();

        hd.update_fast_getters();
        histo->copy_from_data(hd);

      } else if(a_dim==2) {
        histo::p2d* histo = 0;
        if(isVariableBins) {
          histo = new histo::p2d(stitle,edges[0],edges[1]);
        } else {
          histo = new histo::p2d(stitle,bins[0],mns[0],mxs[0],bins[1],mns[1],mxs[1]);
        }

        pd_data hd = histo->get_histo_data();
        if(hd.m_bin_number<=0) {delete histo;return raxml_out();}

       {looper _for(a_tree);
        while(tree* _tree = _for.next_tree()) {

          if(!read_bins(*_tree,hd,a_out,a_is_prof)) {
            delete histo;
            return raxml_out();
          }

        }}

        hdl = new handle<histo::p2d>(histo);
        sclass = histo::p2d::s_class();

        hd.update_fast_getters();
        histo->copy_from_data(hd);
      }
    } else {
      if(a_dim==1) {
        histo::h1d* histo = 0;
        if(isVariableBins) {
          histo = new histo::h1d(stitle,edges[0]);
        } else {
          histo = new histo::h1d(stitle,bins[0],mns[0],mxs[0]);
        }

        pd_data hd(histo->dac());
        if(hd.m_bin_number<=0) {delete histo;return raxml_out();}

       {looper _for(a_tree);
        while(tree* _tree = _for.next_tree()) {

          if(!read_bins(*_tree,hd,a_out,a_is_prof)) {
            delete histo;
            return raxml_out();
          }

        }}

        hdl = new handle<histo::h1d>(histo);
        sclass = histo::h1d::s_class();

        hd.update_fast_getters();
        histo->copy_from_data(hd);

      } else if(a_dim==2) {
        histo::h2d* histo = 0;
        if(isVariableBins) {
          histo = new histo::h2d(stitle,edges[0],edges[1]);
        } else {
          histo = new histo::h2d(stitle,bins[0],mns[0],mxs[0],bins[1],mns[1],mxs[1]);
        }

        pd_data hd(histo->dac());
        if(hd.m_bin_number<=0) {delete histo;return raxml_out();}

       {looper _for(a_tree);
        while(tree* _tree = _for.next_tree()) {

          if(!read_bins(*_tree,hd,a_out,a_is_prof)) {
            delete histo;
            return raxml_out();
          }

        }}

        hdl = new handle<histo::h2d>(histo);
        sclass = histo::h2d::s_class();

        hd.update_fast_getters();
        histo->copy_from_data(hd);

      } else if(a_dim==3) {
        histo::h3d* histo = 0;
        if(isVariableBins) {
          histo = new histo::h3d(stitle,edges[0],edges[1],edges[2]);
        } else {
          histo = new histo::h3d(stitle,bins[0],mns[0],mxs[0],
                                               bins[1],mns[1],mxs[1],
                                               bins[2],mns[2],mxs[2]);
        }

        pd_data hd(histo->dac());
        if(hd.m_bin_number<=0) {delete histo;return raxml_out();}

       {looper _for(a_tree);
        while(tree* _tree = _for.next_tree()) {

          if(!read_bins(*_tree,hd,a_out,a_is_prof)) {
            delete histo;
            return raxml_out();
          }

        }}

        hdl = new handle<histo::h3d>(histo);
        sclass = histo::h3d::s_class();

        hd.update_fast_getters();
        histo->copy_from_data(hd);

      }
    }

    if(!hdl) return raxml_out();

    if(a_verbose) {
      a_out << "tools::xml::aidas::read_histo :"
            << " with name " << sout(sname)
            << " and title " << sout(stitle)
            << " done." << std::endl;
    }

    return raxml_out(hdl,sclass,spath,sname);
  }

  static raxml_out read_cloud(tree& a_tree,std::ostream& a_out,bool a_verbose,int a_dim){

    std::string sname;
    a_tree.attribute_value(s_name(),sname);

    if(a_verbose) {
      a_out << "tools::xml::aidas::read_cloud :"
            << " name " << sout(sname)
            << "..." << std::endl;
    }

    std::string spath;
    a_tree.attribute_value(s_path(),spath);

    std::string stitle;
    a_tree.attribute_value(s_title(),stitle);

    std::string svalue;

    // Booking parameters :
    int max_entries = -1; //UNLIMITED
    if(a_tree.attribute_value(s_maxEntries(),svalue)) {
      int ival;
      if(!to<int>(svalue,ival)) return raxml_out();
      max_entries = ival;
    }

    base_handle* hdl = 0;
    std::string sclass;

    if(a_dim==1) {

      histo::c1d* cloud = new histo::c1d(stitle,max_entries);

      // Data sub items :
     {looper _for(a_tree);
      while(tree* _tree = _for.next_tree()) {
        if(!read_cloud_data(*_tree,*cloud,a_verbose,a_out)) {
          delete cloud;
          return raxml_out();
        }
      }}

      hdl = new handle<histo::c1d>(cloud);
      sclass = histo::c1d::s_class();

    } else if(a_dim==2) {

      histo::c2d* cloud = new histo::c2d(stitle,max_entries);

      // Data sub items :
     {looper _for(a_tree);
      while(tree* _tree = _for.next_tree()) {
        if(!read_cloud_data(*_tree,*cloud,a_verbose,a_out)) {
          delete cloud;
          return raxml_out();
        }
      }}

      hdl = new handle<histo::c2d>(cloud);
      sclass = histo::c2d::s_class();

    } else if(a_dim==3) {

      histo::c3d* cloud = new histo::c3d(stitle,max_entries);

      // Data sub items :
     {looper _for(a_tree);
      while(tree* _tree = _for.next_tree()) {
        if(!read_cloud_data(*_tree,*cloud,a_verbose,a_out)) {
          delete cloud;
          return raxml_out();
        }
      }}

      hdl = new handle<histo::c3d>(cloud);
      sclass = histo::c3d::s_class();
    }

    if(!hdl) return raxml_out();

    if(a_verbose) {
      a_out << "tools::xml::aidas::read_cloud :"
            << " with name " << sout(sname)
            << " and title " << sout(stitle)
            << " done." << std::endl;
    }

    return raxml_out(hdl,sclass,spath,sname);
  }

protected:
  typedef histo::profile_data<double,unsigned int,unsigned int,double,double> pd_data;
  ///////////////////////////////////////////////////////////////
  /// read histo ////////////////////////////////////////////////
  ///////////////////////////////////////////////////////////////
  static bool read_axis(
   tree& a_tree
  ,unsigned int a_dim
  ,int& aAxis
  ,bn_t& aNumberOfBins
  ,double& aMin
  ,double& aMax
  ,std::vector<double>& aEdges
  ,bool& aVariableBins
  ,std::ostream& //a_out
  ){
    int not_found = -1;
    aAxis = not_found;
    aNumberOfBins = 0;
    aMin = 0;
    aMax = 0;
    aEdges.clear();
    aVariableBins = false;

    const std::string& tagName = a_tree.tag_name();

    std::string svalue;

    if(tagName==s_axis()) {

     {bn_t ival;
      if(!a_tree.attribute_value(s_numberOfBins(),svalue)) return false;
      if(!to<bn_t>(svalue,ival)) return false;
      aNumberOfBins = ival;}

      if(!a_tree.attribute_value(s_min(),svalue)) return false;
      if(!to<double>(svalue,aMin)) return false;

      if(!a_tree.attribute_value(s_max(),svalue)) return false;
      if(!to<double>(svalue,aMax)) return false;

      if(!a_tree.attribute_value(s_direction(),svalue)) return false;
      if(!axis_index(a_dim,svalue,aAxis)) return false;

      aEdges.push_back(aMin);

     {looper _for(a_tree);
      while(element* _elem = _for.next_element()) {
        if(_elem->name()==s_binBorder()) {
          if(!_elem->attribute_value(s_value(),svalue)) return false;
          double value;
          if(!to<double>(svalue,value)) return false;
          aEdges.push_back(value);
          aVariableBins = true;
        }
      }}

      aEdges.push_back(aMax);
      if(aVariableBins) { // Variable bins histo.
        if(aEdges.size()!=aNumberOfBins+1) return false;
      }

    }

    return true;
  }
  static bool to_double(const std::string& a_s,double& a_v,std::ostream& a_out,const std::string& a_what) {
    if(!to<double>(a_s,a_v)) {
      a_out << "tools::xml::aidas::read_bins :"
            << " problem converting a " << a_what
            << " attribute to a double."
            << " Value was " << sout(a_s) << "."
            << std::endl;
      return false;
    }
    return true;
  }

  static bool read_bins(tree& a_tree,pd_data& aData,std::ostream& a_out,bool a_is_prof){
    const std::string& tagName = a_tree.tag_name();

    std::string svalue;

    if(tagName==s_annotation()) { //FIXME

      return true;

    } else if(tagName=="statistics") {

      if(!a_tree.attribute_value(s_entries(),svalue)) return false;

      unsigned int found = 0;

     {looper _for(a_tree);
      while(element* _elem = _for.next_element()) {

        if(_elem->name()==s_statistic()) {
          double mean,rms;
          if(!_elem->attribute_value(s_mean(),svalue)) return false;
          if(!to<double>(svalue,mean)) return false;

          if(!_elem->attribute_value(s_rms(),svalue)) return false;
          if(!to<double>(svalue,rms)) return false;

          if(!_elem->attribute_value(s_direction(),svalue)) return false;
          int iaxis;
          if(!axis_index(aData.m_dimension,svalue,iaxis)) return false;

          found++;
        }
      }}

      if(found!=aData.m_dimension) return false;

      return true;

    } else if(tagName==s_axis()) {

      return true;

    }

    unsigned int dimension = 0;
    if(tagName==s_data1d()) {
      dimension = 1;
    } else if(tagName==s_data2d()) {
      dimension = 2;
    } else if(tagName==s_data3d()) {
      dimension = 3;
    }

    if(dimension) {

      if(dimension!=aData.m_dimension) return false;

      std::string sbin;
      sprintf(sbin,32,"bin%dd",dimension);

     {looper _for(a_tree);
      while(element* _elem = _for.next_element()) {

        if(_elem->name()==sbin) {

          std::vector<int> is(dimension);

          unsigned int entries = 0;
          double height = 0;
          double error = 0;
          double weightedMean = 0;
          double weightedMeanX = 0;
          double weightedMeanY = 0;
          double weightedMeanZ = 0;
          double weightedRms = 0;
          double weightedRmsX = 0;
          double weightedRmsY = 0;
          double weightedRmsZ = 0;
          double rms = 0;

          // Required :
          if(!_elem->attribute_value(s_entries(),svalue)) {
            a_out << "tools::xml::aidas::read_bins :"
                  << " a <bin1d> has no " << "entries"
                  << " attribute."
                  << std::endl;
            return false;
          }
          if(!to<unsigned int>(svalue,entries)) {
            a_out << "tools::xml::aidas::read_bins :"
              << " problem converting a entries attribute to an unsigned int."
                << " Value was " << sout(svalue) << "."
                << std::endl;
            return false;
          }

          // Optional :
          bool height_given;
          if(_elem->attribute_value(s_height(),svalue)) { //FIXME : optional ?
            if(!to_double(svalue,height,a_out,s_height())) return false;
            height_given = true;
          } else { // no "height".
            // It is assumed that at fill time the weight
            // argument "w" had always been 1.
            //   w = 1
            //   sw = entries*1 = entries
            height = double(entries);
            height_given = false;
          }

          if(_elem->attribute_value(s_error(),svalue)) { //FIXME : optional ?
            if(!to_double(svalue,error,a_out,s_error())) return false;
          } else { // no "error"
            if(height_given) {
              // then we are going to have :
              //   sw = height
              //   error = ?
              // We can assume that at fill time the same weight "w"
              // had been given to all entries. Then :
              //   sw = entries*w = height
              //   w = height/entries;
              //   sw2 = entries*(w*w) = (height**2)/entries
              //   error = sqrt(sw2) = sqrt((height**2)/entries)
              if(entries) {
                error = ::sqrt(::fabs( ((height*height)/entries) ));
              }
            } else {
              // It is assumed that at fill time the weight
              // argument "w" had always been 1.
              //   w = 1
              //   sw2 = entries*(w*w) = entries;
              //   error = sqrt(sw2) = sqrt(entries);
              error = ::sqrt(::fabs(double(entries)));
            }
          }

          if(_elem->attribute_value(s_rms(),svalue)) {
            if(!to_double(svalue,rms,a_out,s_rms())) return false;
          }

          if(dimension==1) {
            if(_elem->attribute_value(s_weightedMean(),svalue)) {
              if(!to_double(svalue,weightedMean,a_out,s_weightedMean())) return false;
            }
            if(_elem->attribute_value(s_weightedRms(),svalue)) {
              if(!to_double(svalue,weightedRms,a_out,s_weightedRms())) return false;
            }
          } else if(dimension==2) {
            if(_elem->attribute_value(s_weightedMeanX(),svalue)) {
              if(!to_double(svalue,weightedMeanX,a_out,s_weightedMeanX())) return false;
            }
            if(_elem->attribute_value(s_weightedMeanY(),svalue)) {
              if(!to_double(svalue,weightedMeanY,a_out,s_weightedMeanY())) return false;
            }
            if(_elem->attribute_value(s_weightedRmsX(),svalue)) {
              if(!to_double(svalue,weightedRmsX,a_out,s_weightedRmsX())) return false;
            }
            if(_elem->attribute_value(s_weightedRmsY(),svalue)) {
              if(!to_double(svalue,weightedRmsY,a_out,s_weightedRmsY())) return false;
            }
          } else if(dimension==3) {
            if(_elem->attribute_value(s_weightedMeanX(),svalue)) {
              if(!to_double(svalue,weightedMeanX,a_out,s_weightedMeanX())) return false;
            }
            if(_elem->attribute_value(s_weightedMeanY(),svalue)) {
              if(!to_double(svalue,weightedMeanY,a_out,s_weightedMeanY())) return false;
            }
            if(_elem->attribute_value(s_weightedMeanZ(),svalue)) {
              if(!to_double(svalue,weightedMeanZ,a_out,s_weightedMeanZ())) return false;
            }
            if(_elem->attribute_value(s_weightedRmsX(),svalue)) {
              if(!to_double(svalue,weightedRmsX,a_out,s_weightedRmsX())) return false;
            }
            if(_elem->attribute_value(s_weightedRmsY(),svalue)) {
              if(!to_double(svalue,weightedRmsY,a_out,s_weightedRmsY())) return false;
            }
            if(_elem->attribute_value(s_weightedRmsZ(),svalue)) {
              if(!to_double(svalue,weightedRmsZ,a_out,s_weightedRmsZ())) return false;
            }
          }

         {for(unsigned int index=0;index<dimension;index++) {
            std::string _s = "binNum";
            if(dimension!=1) {
              if(index==0) _s += "X";
              else if(index==1) _s += "Y";
              else if(index==2) _s += "Z";
            }
            if(!_elem->attribute_value(_s,svalue)) {
              a_out << "tools::xml::aidas::read_bins :"
                  << " a <bin1d> has no " << _s << std::endl;
              return false;
            }
            if(svalue=="UNDERFLOW") {
              is[index] = histo::axis_UNDERFLOW_BIN;
            } else if(svalue=="OVERFLOW") {
              is[index] = histo::axis_OVERFLOW_BIN;
            } else {
              int ival = 0;
              if(!to<int>(svalue,ival)) {
                a_out << "tools::xml::aidas::read_bins :"
                    << " problem converting binNum to an int."
                    << " Value was " << sout(svalue) << "."
                    << std::endl;
                return false;
              }
              int ibin = ival;
              if( (ibin<0) || (ibin>=(int)aData.m_axes[index].bins()) ) {
                a_out << "tools::xml::aidas::read_bins :"
                    << " a binNum is out of range."
                    << std::endl;
                return false;
              }
              is[index] = ibin;
            }
          }}

          // If we are here, then we have a valid bin :
          bn_t offset;
          histo::get_offset(aData.m_axes,is,offset);
          aData.m_bin_entries[offset] = entries;

          if(!a_is_prof) {

            // From histo::base_histo, we have :
            //  height = sw
            //  error = sqrt(sw)
            //  weightedMean = sxw/sw
            //  weightedRms = sqrt(fabs(sx2w/sw - (sxw/sw)**2))

            double sw = height;
            aData.m_bin_Sw[offset] = sw;
            aData.m_bin_Sw2[offset] = error * error;
            if(dimension==1) {
              aData.m_bin_Sxw[offset][0] = weightedMean * sw;
              aData.m_bin_Sx2w[offset][0] =
                (weightedRms * weightedRms + weightedMean * weightedMean) * sw;
            } else if(dimension==2){
              // X
              aData.m_bin_Sxw[offset][0] = weightedMeanX * sw;
              aData.m_bin_Sx2w[offset][0] =
                (weightedRmsX*weightedRmsX + weightedMeanX*weightedMeanX) * sw;
              // Y :
              aData.m_bin_Sxw[offset][1] = weightedMeanY * sw;
              aData.m_bin_Sx2w[offset][1] =
                (weightedRmsY*weightedRmsY + weightedMeanY*weightedMeanY) * sw;
            } else if(dimension==3){
              // X
              aData.m_bin_Sxw[offset][0] = weightedMeanX * sw;
              aData.m_bin_Sx2w[offset][0] =
                (weightedRmsX*weightedRmsX + weightedMeanX*weightedMeanX) * sw;
              // Y :
              aData.m_bin_Sxw[offset][1] = weightedMeanY * sw;
              aData.m_bin_Sx2w[offset][1] =
                (weightedRmsY*weightedRmsY + weightedMeanY*weightedMeanY) * sw;
              // Z :
              aData.m_bin_Sxw[offset][2] = weightedMeanZ * sw;
              aData.m_bin_Sx2w[offset][2] =
                (weightedRmsZ*weightedRmsZ + weightedMeanZ*weightedMeanZ) * sw;
            }

          } else { // Profile :

            // bin writing is :
            // " height=" << sout(aObj.bin_height(aIndex))
            // " error=" << sout(aObj.bin_error(aIndex))
            // " weightedMean=" << sout(aObj.bin_mean(aIndex))
            // " rms=" << sout(aObj.bin_rms_value(aIndex))
            // " weightedRms=" << sout(bin_rms(aIndex));

            // From inlib profile, we have :
            //  height = svw / sw
            //  error = sqrt(fabs(sv2w/sw - (svw/sw)**2))/sqrt(sw)
            //  rms = sqrt(fabs(sv2w/sw - (svw/sw)**2))
            //  weightedMean = sxw/sw
            //  weightedRms = sqrt(fabs(sx2w/sw - (sxw/sw)**2))

            // Then :
            //  sw = (rms/error)**2
            //  svw = sw * height
            //  sv2w = sw * (rms**2 + height**2)
            //  sxw = weightedMean * sw
            //  sx2w = (weightedRms*weightedRms+weightedMean*weightedMean) * sw;

            double sw = 0;
            if(error==0) {
              // sv2w/sw = (svw/sw)**2
              // h = svw/sw
              //FIXME : we lack an info to get sw.
              // We assume that at fill time weight==1 then :
              //   sw == n
              sw = (double)entries;
            } else {
              double r_e = rms/error;
              sw = r_e * r_e;
            }
            aData.m_bin_Sw[offset] = sw;
            aData.m_bin_Sw2[offset] = 0; //FIXME
            if(dimension==1) {
              aData.m_bin_Sxw[offset][0] = weightedMean * sw;
              aData.m_bin_Sx2w[offset][0] =
                (weightedRms * weightedRms + weightedMean * weightedMean) * sw;
            } else if(dimension==2){
              aData.m_bin_Sxw[offset][0] = weightedMeanX * sw;
              aData.m_bin_Sxw[offset][1] = weightedMeanY * sw;
              aData.m_bin_Sx2w[offset][0] =
                (weightedRmsX*weightedRmsX + weightedMeanX*weightedMeanX) * sw;
              aData.m_bin_Sx2w[offset][1] =
                (weightedRmsY*weightedRmsY + weightedMeanY*weightedMeanY) * sw;
            }
            aData.m_bin_Svw[offset] = sw * height;
            aData.m_bin_Sv2w[offset] = sw * (rms * rms + height * height);

          }
        }
      }}

      return true;
    }

    return false;
  }

  static bool axis_index(unsigned int a_dim,const std::string& a_axis,int& a_index) {
    if(a_dim==1) {
      if(a_axis=="x") {a_index = 0;return true;}
    } else if(a_dim==2) {
      if(a_axis=="x") {a_index = 0;return true;}
      else if(a_axis=="y") {a_index = 1;return true;}
    } else if(a_dim==3) {
      if(a_axis=="x") {a_index = 0;return true;}
      else if(a_axis=="y") {a_index = 1;return true;}
      else if(a_axis=="z") {a_index = 2;return true;}
    }
    return false;
  }

  ///////////////////////////////////////////////////////////////
  /// read ntuple ///////////////////////////////////////////////
  ///////////////////////////////////////////////////////////////
  class colbook {
  public:
    colbook(const std::string& a_type,
            const std::string& a_name,
            const std::string& a_s,
            bool a_ntu)
    :m_type(a_type),m_name(a_name),m_def_or_bkg(a_s),m_ntu(a_ntu){}
  public:
    colbook(const colbook& a_from)
    :m_type(a_from.m_type)
    ,m_name(a_from.m_name)
    ,m_def_or_bkg(a_from.m_def_or_bkg)
    ,m_ntu(a_from.m_ntu)
    {}

    colbook& operator=(const colbook& a_from){
      if(&a_from==this) return *this;
      m_type = a_from.m_type;
      m_name = a_from.m_name;
      m_def_or_bkg = a_from.m_def_or_bkg;
      m_ntu = a_from.m_ntu;
      return *this;
    }
  public:
    const std::string& type() const {return m_type;}
    const std::string& name() const {return m_name;}
    const std::string& def_or_bkg() const {return m_def_or_bkg;}
    bool is_ntu() const {return m_ntu;}
  protected:
    std::string m_type;
    std::string m_name;
    std::string m_def_or_bkg;
    bool m_ntu;
  };

  static bool read_ntu_columns(tree& a_tree,
                                 bool& a_found,
                                 std::vector<colbook>& a_booking,
                                 std::ostream& a_out){
    a_found = false;
    a_booking.clear();

    const std::string& tag_name = a_tree.tag_name();

    if(tag_name=="columns") {

     {looper _for(a_tree);
      while(element* _elem = _for.next_element()) {

        if(_elem->name()=="column") {
          std::string stype;
          if(!_elem->attribute_value(s_type(),stype)) {
            a_out << "tools::xml::aidas::read_ntu_columns :"
                  << " atb type missing on <column>"
                  << std::endl;
            return false;
          }
          std::string sname;
          if(!_elem->attribute_value(s_name(),sname)) {
            a_out << "tools::xml::aidas::read_ntu_columns :"
                  << " atb name missing on <column>"
                  << std::endl;
            return false;
          }

          std::string _s;
          if(_elem->attribute_value(s_booking(),_s)) {
            a_booking.push_back(colbook(stype,sname,_s,true));
          } else if(_elem->attribute_value(s_default(),_s)) {
            a_booking.push_back(colbook(stype,sname,_s,false));
          } else {
            a_booking.push_back(colbook(stype,sname,"",false));
          }
        }

      }}

      a_found = true;
    }
    return true;
  }

  static bool read_ntu_rows(tree& a_tree,
                                   aida::base_ntu& a_ntu,
                                   bool& a_found,
                                   std::ostream& a_out){
    a_found = false;

    const std::string& tag_name = a_tree.tag_name();

    if(tag_name==s_annotation()) { //FIXME

      return true;

    } else if(tag_name==s_columns()) {

      return true;

    } else if(tag_name==s_rows()) {

      // Sub items :
     {looper _for(a_tree);
      while(tree* _tree = _for.next_tree()) {

        if(!read_ntu_rows(*_tree,a_ntu,a_found,a_out)) {
          a_out << "tools::xml::aidas::read_ntu_rows :"
                << " sub read_ntu_rows failed."
                << std::endl;
          return false;
        }

      }}

      a_found = true;

      return true;

    } else if(tag_name==s_row()) {

      const std::vector<aida::base_col*>& cols = a_ntu.columns();

      std::vector<unsigned int> intus;
      std::vector<unsigned int> inot_ntus;
     {unsigned int index = 0;
      tools_vforcit(aida::base_col*,cols,it) {
        if(safe_cast<aida::base_col,aida::aida_col_ntu>(*(*it))) {
          intus.push_back(index);
        } else {
          inot_ntus.push_back(index);
        }
        index++;
      }}

      std::string svalue;

     {unsigned int icol = 0;

     {looper _for(a_tree);
      while(element* _elem = _for.next_element()) {

        if(_elem->name()==s_entry()) {
          if(!_elem->attribute_value(s_value(),svalue)) {
            a_out << "tools::xml::aidas::read_ntu_rows :"
                  << " can't get \"value\" attribute." << std::endl;
            return false;
          }
          if(icol>=inot_ntus.size()) {
            a_out << "tools::xml::aidas::read_ntu_rows :"
                  << " too much <entry>." << std::endl;
            return false;
          }
          if(inot_ntus[icol]>=cols.size()) {
            a_out << "tools::xml::aidas::read_ntu_rows :"
                  << " too much <entry>." << std::endl;
            return false;
          }

          aida::base_col* bcol = cols[inot_ntus[icol]];

          aida::aida_base_col* abcol =
          safe_cast<aida::base_col,aida::aida_base_col>(*bcol);

          if(!abcol->s_fill(svalue)) {
            a_out << "tools::xml::aidas::read_ntu_rows :"
                  << " can't get \"value\" attribute." << std::endl;
            return false;
          }
          icol++;
        }

      }}}

      // Sub items (entryITuple) :
     {unsigned int icol = 0;

     {looper _for(a_tree);
      while(tree* _tree = _for.next_tree()) {

        const std::string& _tag_name = _tree->tag_name();
        if(  (_tag_name==s_entryITuple())  || //aida.dtd spec.
             (_tag_name==s_entryTuple())   ){ //backward comp.
          if(icol>=intus.size()) {
            a_out << "tools::xml::aidas::read_ntu_rows :"
                  << " too much <entry>." << std::endl;
            return false;
          }
          if(intus[icol]>=cols.size()) {
            a_out << "tools::xml::aidas::read_ntu_rows :"
                  << " too much <entry>." << std::endl;
            return false;
          }

          aida::base_col* bcol = cols[intus[icol]];
          aida::aida_col_ntu* col_ntu = safe_cast<aida::base_col,aida::aida_col_ntu>(*bcol);
          if(!col_ntu) {
            a_out << "tools::xml::aidas::read_ntu_rows :"
                  << " can't cast to bcol_ntu."
                  << std::endl;
            return false;
          }
          aida::base_ntu* ntu = col_ntu->get_to_fill();
          if(!ntu) {
            a_out << "tools::xml::aidas::read_ntu_rows :"
                  << " get_to_fill() returned null."
                  << std::endl;
            return false;
          }

         {looper _for2(*_tree);
          while(tree* _tree2 = _for2.next_tree()) {
            bool found;
            if(!read_ntu_rows(*_tree2,*ntu,found,a_out)) return false;
          }}

          icol++;
        }

      }}}

      if(!a_ntu.add_row()) {
        a_out << "tools::xml::aidas::read_ntu_rows :"
              << " can't add row to ntuple."
              << std::endl;
        return false;
      }

      return true;

    }

    a_out << "tools::xml::aidas::read_ntu_rows :"
          << " unknown item class " << sout(tag_name) << std::endl;

    return false;
  }

  static raxml_out read_ntu(tree& a_tree,std::ostream& a_out,bool a_verbose,void*){
    std::string sname;
    a_tree.attribute_value(s_name(),sname);

    if(a_verbose) {
      a_out << "tools::xml::aidas::read_ntu :"
            << " with name " << sout(sname)
            << "..." << std::endl;
    }

    std::string spath;
    a_tree.attribute_value(s_path(),spath);

    std::string stitle;
    a_tree.attribute_value(s_title(),stitle);

    //FIXME annotation

    // Booking parameters :
    std::vector<colbook> booking;

    // Jump in subitems to find columns items :
    bool found = false;

   {looper _for(a_tree);
    while(tree* _tree = _for.next_tree()) {
      if(!read_ntu_columns(*_tree,found,booking,a_out)) return raxml_out();
      if(found) break;
    }}

    if(!found) {
      a_out << "tools::xml::aidas::read_ntu :"
            << " for ntuple name " << sout(sname)
            << " unable to read columns..." << std::endl;
      return raxml_out();
    }

    // Create a aida::ntuple :
    aida::ntuple* ntu = new aida::ntuple(a_out,stitle);
   {tools_vforcit(colbook,booking,it) {
      if(!aida::create_col(*ntu,
                               (*it).type(),
                               (*it).name(),
                               (*it).def_or_bkg(),
                               (*it).is_ntu())){
        delete ntu;
        return raxml_out();
      }
    }}

    if(!ntu->columns().size()) { //??? we could have an empty ntu !
      a_out << "tools::xml::aidas::read_ntu :"
            << " for ntuple name " << sout(sname)
            << " unable to create a aida::ntuple." << std::endl;
      delete ntu;
      return raxml_out();
    }

    // Get rows in sub items :
    found = false;

   {looper _for(a_tree);
    while(tree* _tree = _for.next_tree()) {

      if(!read_ntu_rows(*_tree,*ntu,found,a_out)) {
        a_out << "tools::xml::aidas::read_ntu :"
              << " for ntuple name " << sout(sname)
              << " unable to read rows." << std::endl;
        delete ntu;
        return raxml_out();
      }
      if(found) break;

    }}

    if(a_verbose) {
      a_out << "tools::xml::aidas::read_ntu :"
            << " name " << sout(sname)
            << " done." << std::endl;
    }

    std::string sclass = aida::ntuple::s_class();
    return raxml_out(new handle<aida::ntuple>(ntu),sclass,spath,sname);
  }

  ///////////////////////////////////////////////////////////////
  /// read cloud ////////////////////////////////////////////////
  ///////////////////////////////////////////////////////////////

  static bool read_cloud_data(tree& a_tree,
                              histo::c1d& aCloud,bool a_verbose,
                              std::ostream& a_out){
    const std::string& tagName = a_tree.tag_name();

    std::string svalue;

    if(tagName==s_annotation()) { //FIXME

      return true;

    } else if(tagName==s_entries1d()) {

     {looper _for(a_tree);
      while(element* _elem = _for.next_element()) {
        if(_elem->name()==s_entry1d()) {
          double x;
          if(!_elem->attribute_value(s_valueX(),x)) return false;
          double w = 1;
          if(_elem->attribute_value(s_weight(),svalue)) {
            if(!to<double>(svalue,w)) return false;
          }
          if(!aCloud.fill(x,w)) return false;
        }
      }}
      return true;

    } else if(tagName==s_histogram1d()) {

      raxml_out ro = read_h1d(a_tree,a_out,a_verbose,0);
      if(ro.cls()==histo::h1d::s_class()) {
        histo::h1d* h = (histo::h1d*)ro.object();
        if(h) {
          aCloud.set_histogram(h);
          ro.disown();
        }
      }
      return true;

    }

    return false;
  }

  static bool read_cloud_data(tree& a_tree,
                              histo::c2d& aCloud,
                              bool a_verbose,
                              std::ostream& a_out){
    const std::string& tagName = a_tree.tag_name();

    std::string svalue;

    if(tagName==s_annotation()) { //FIXME

      return true;

    } else if(tagName==s_entries2d()) {

     {looper _for(a_tree);
      while(element* _elem = _for.next_element()) {
        if(_elem->name()==s_entry2d()) {
          double x;
          if(!_elem->attribute_value(s_valueX(),x)) return false;
          double y;
          if(!_elem->attribute_value(s_valueY(),y)) return false;
          double w = 1;
          if(_elem->attribute_value(s_weight(),svalue)) {
            if(!to<double>(svalue,w)) return false;
          }
          if(!aCloud.fill(x,y,w)) return false;
        }
      }}
      return true;

    } else if(tagName==s_histogram2d()) {

      raxml_out ro = read_h2d(a_tree,a_out,a_verbose,0);
      if(ro.cls()==histo::h2d::s_class()) {
        histo::h2d* h = (histo::h2d*)ro.object();
        if(h) {
          aCloud.set_histogram(h);
          ro.disown();
        }
      }
      return true;

    }

    return false;
  }

  static bool read_cloud_data(tree& a_tree,
                              histo::c3d& aCloud,
                              bool a_verbose,
                              std::ostream& a_out){
    const std::string& tagName = a_tree.tag_name();

    std::string svalue;

    if(tagName==s_annotation()) { //FIXME

      return true;

    } else if(tagName==s_entries3d()) {

     {looper _for(a_tree);
      while(element* _elem = _for.next_element()) {
        if(_elem->name()==s_entry3d()) {
          double x;
          if(!_elem->attribute_value(s_valueX(),x)) return false;
          double y;
          if(!_elem->attribute_value(s_valueY(),y)) return false;
          double z;
          if(!_elem->attribute_value(s_valueZ(),z)) return false;
          double w = 1;
          if(_elem->attribute_value(s_weight(),svalue)) {
            if(!to<double>(svalue,w)) return false;
          }
          if(!aCloud.fill(x,y,z,w)) return false;
        }
      }}
      return true;

    } else if(tagName==s_histogram3d()) {

      raxml_out ro = read_h3d(a_tree,a_out,a_verbose,0);
      if(ro.cls()==histo::h3d::s_class()) {
        histo::h3d* h = (histo::h3d*)ro.object();
        if(h) {
          aCloud.set_histogram(h);
          ro.disown();
        }
      }
      return true;

    }

    return false;
  }

  static bool read_dps_data(tree& a_tree,histo::dps& a_dps){
    const std::string& tagName = a_tree.tag_name();

    std::string svalue;

    if(tagName==s_annotation()) { //FIXME

      return true;

    } else if(tagName==s_dataPoint()) {

      histo::data_point& point = a_dps.add_point();

      unsigned int coord = 0;

     {looper _for(a_tree);
      while(element* _elem = _for.next_element()) {
        if(_elem->name()==s_measurement()) {
          if(coord>=a_dps.dimension()) return false;
          double value;
          if(!_elem->attribute_value(s_value(),value)) return false;
          double errorPlus = 0;
          if(_elem->attribute_value(s_errorPlus(),svalue)) {
            if(!to<double>(svalue,errorPlus)) return false;
          }
          double errorMinus = 0;
          if(_elem->attribute_value(s_errorMinus(),svalue)) {
            if(!to<double>(svalue,errorMinus)) return false;
          }

          histo::measurement& _m = point.coordinate(coord);
          _m.set_value(value);
          _m.set_error_plus(errorPlus);
          _m.set_error_minus(errorMinus);

          coord++;
        }
      }}
      return true;

    }

    return false;
  }


protected:
  readers m_readers;
  std::vector<raxml_out> m_objects;
};

}}

#endif
