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

#ifndef tools_histo_histo_data
#define tools_histo_histo_data

#include <vector>
#include <map> //for annotations

#include "axis"

namespace tools {
namespace histo {

//TC is for a coordinate.
//TN is for a number of entries.
//TW is for a weight.

template <class TC,class TN,class TW>
class histo_data {
public:
  typedef typename axis<TC>::bn_t bn_t;
  typedef unsigned int dim_t;
public:
  histo_data()
  :m_dimension(0)
  ,m_bin_number(0)
  //,m_mode(0)
  {}
public:
  histo_data(const histo_data& a_from)
  :m_title(a_from.m_title)
  ,m_dimension(a_from.m_dimension)
  ,m_bin_number(a_from.m_bin_number)
  //,m_mode(a_from.m_mode)
  // Arrays :
  ,m_bin_entries(a_from.m_bin_entries)
  ,m_bin_Sw(a_from.m_bin_Sw)
  ,m_bin_Sw2(a_from.m_bin_Sw2)
  ,m_bin_Sxw(a_from.m_bin_Sxw)
  ,m_bin_Sx2w(a_from.m_bin_Sx2w)
  ,m_axes(a_from.m_axes)
  ,m_annotations(a_from.m_annotations)
  {}

  histo_data& operator=(const histo_data& a_from) {
    m_title = a_from.m_title;
    m_dimension = a_from.m_dimension;
    m_bin_number = a_from.m_bin_number;
    //m_mode = a_from.m_mode;
    // Arrays :
    m_bin_entries = a_from.m_bin_entries;
    m_bin_Sw = a_from.m_bin_Sw;
    m_bin_Sw2 = a_from.m_bin_Sw2;
    m_bin_Sxw = a_from.m_bin_Sxw;
    m_bin_Sx2w = a_from.m_bin_Sx2w;
    m_axes = a_from.m_axes;
    //
    m_annotations = a_from.m_annotations;
    return *this;
  }

  virtual ~histo_data(){}
public: 
  void base_reset() { //used in multiply,divide.
    // Reset content (different of clear that deallocate all internal things).
    for(bn_t ibin=0;ibin<m_bin_number;ibin++) {
      m_bin_entries[ibin] = 0;
      m_bin_Sw[ibin] = 0;
      m_bin_Sw2[ibin] = 0;
      for(dim_t iaxis=0;iaxis<m_dimension;iaxis++) {
        m_bin_Sxw[ibin][iaxis] = 0;
        m_bin_Sx2w[ibin][iaxis] = 0;
      }
    }
  }

public:
  // for BatchLab::Rio::TH::streamTH1 :
  TN get_entries() const {
    TN number = 0;
    for(bn_t ibin=0;ibin<m_bin_number;ibin++) {
      if(!is_out(ibin)) {
        number += m_bin_entries[ibin];
      }
    }
    return number;
  }
  TW get_Sw() const {
    TW sw = 0;
    for(bn_t ibin=0;ibin<m_bin_number;ibin++) {
      if(!is_out(ibin)) {
        sw += m_bin_Sw[ibin];
      }
    }
    return sw;
  }

  TW get_Sw2() const {
    TW sw2 = 0;
    for(bn_t ibin=0;ibin<m_bin_number;ibin++) {
      if(!is_out(ibin)) {
        sw2 += m_bin_Sw2[ibin];
      }
    }
    return sw2;
  }

  bool get_ith_axis_Sxw(dim_t a_axis,TC& a_value) const {
    a_value = 0;
    if(a_axis>=m_dimension) return false;
    for(bn_t ibin=0;ibin<m_bin_number;ibin++) {
      if(!is_out(ibin)) {
        a_value += m_bin_Sxw[ibin][a_axis];
      }
    }
    return true;
  }

  bool get_ith_axis_Sx2w(dim_t a_axis,TC& a_value) const {
    a_value = 0;
    if(a_axis>=m_dimension) return false;
    for(bn_t ibin=0;ibin<m_bin_number;ibin++) {
      if(!is_out(ibin)) {
        a_value += m_bin_Sx2w[ibin][a_axis];
      }
    }
    return true;
  }

  TN get_all_entries() const {
    TN number = 0;
    for(bn_t ibin=0;ibin<m_bin_number;ibin++) {
      number += m_bin_entries[ibin];
    }
    return number;
  }

  bool is_out(bn_t aOffset) const {
    int offset = aOffset;
    int index;
    for(int iaxis=m_dimension-1;iaxis>=0;iaxis--) { 
      index = offset/m_axes[iaxis].m_offset;
      if(index==0) return true;
      if(index==(int(m_axes[iaxis].m_number_of_bins)+1)) return true;
      offset -= index * m_axes[iaxis].m_offset;
    }
    return false;
  }

  void get_indices(bn_t aOffset,std::vector<int>& aIs) const {
    int offset = aOffset;
   {for(int iaxis=m_dimension-1;iaxis>=0;iaxis--) { 
      aIs[iaxis] = offset/m_axes[iaxis].m_offset;
      offset -= aIs[iaxis] * m_axes[iaxis].m_offset;
    }}
    for(dim_t iaxis=0;iaxis<m_dimension;iaxis++) {
      if(aIs[iaxis]==0) {
        aIs[iaxis] = axis<TC>::UNDERFLOW_BIN;
      } else if(aIs[iaxis]==int(m_axes[iaxis].m_number_of_bins)+1) {
        aIs[iaxis] = axis<TC>::OVERFLOW_BIN;
      } else {
        aIs[iaxis]--;
      }
    }
  }

  // for raxml :
  bool get_offset(const std::vector<int>& aIs,bn_t& a_offset) const {
    // aIs[iaxis] is given in in-range indexing :
    //  - [0,n[iaxis]-1] for in-range bins
    //  - UNDERFLOW_BIN for the iaxis underflow bin
    //  - OVERFLOW_BIN for the iaxis overflow bin
    a_offset = 0;
    if(!m_dimension) return false;
    bn_t ibin;
    for(dim_t iaxis=0;iaxis<m_dimension;iaxis++) { 
      if(!m_axes[iaxis].in_range_to_absolute_index(aIs[iaxis],ibin)) {
        a_offset = 0;
        return false;
      }
      a_offset += ibin * m_axes[iaxis].m_offset;
    }
    return true;
  }

public:
  // General :
  std::string m_title;
  dim_t m_dimension;
  // Bins :
  bn_t m_bin_number;
  std::vector<TN> m_bin_entries;
  std::vector<TW> m_bin_Sw;
  std::vector<TW> m_bin_Sw2;
  std::vector< std::vector<TC> > m_bin_Sxw;
  std::vector< std::vector<TC> > m_bin_Sx2w;
  // Axes :
  std::vector< axis<TC> > m_axes;
  // etc :
  std::map<std::string,std::string> m_annotations;
};

}}

#endif