/*********************************************************************/
/*                                                                   */
/* Copyright 2022-2023 Rémi Synave - remi.synave@univ-littoral.fr    */
/*                                                                   */
/* This file is part of DSL.                                         */
/* This software uses Qt to build the Graphical User Interface       */
/* https://www.qt.io/                                                */
/*                                                                   */
/* DSL is free software: you can redistribute it and/or modify       */
/* it under the terms of the GNU General Public License as published */
/* by the Free Software Foundation, either version 3 of the License, */
/* or (at your option) any later version.                            */
/*                                                                   */
/* DSL is distributed in the hope that it will be useful,            */
/* but WITHOUT ANY WARRANTY; without even the implied warranty of    */
/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the      */
/* GNU General Public License for more details.                      */
/*                                                                   */
/* You should have received a copy of the GNU General Public License */
/* along with DSL. If not, see <http://www.gnu.org/licenses/>.       */
/*                                                                   */
/*********************************************************************/

#include <QDebug>
#include <QFile>
#include <QJsonObject>
#include <QJsonArray>
#include <QJsonDocument>
#include <vector>
#include <cmath>

#include "SLList.hpp"

SLList::SLList (const char* file)
{
  list.clear();
  
  QFile fin(QString::fromStdString (file));
  fin.open(QIODevice::ReadOnly);
  QByteArray ba = fin.readAll();
  QJsonParseError parseError;
  QJsonDocument doc = QJsonDocument::fromJson(ba, &parseError);
  QJsonArray lines = doc["lines"].toArray();
  for(int i=0; i<lines.size(); i++){
    QJsonArray line = lines[i].toArray();
    QJsonArray point1 = line[0].toArray();
    QJsonArray point2 = line[1].toArray();
    list << new StrengthLine(point1[0].toDouble(), point1[1].toDouble(), point2[0].toDouble(), point2[1].toDouble());
  }
}

std::pair<double, int> SLList::distance_avg(SLList* sllist, QImage* img) const
{
  const SLList *list1 = this, *list2 = sllist;
  std::vector<double> mins;

  double sum = 0;
  double min;

  for(unsigned int i = 0 ; i < list1->size(); i++)
    {
      min = list1->get(i)->distance(list2->get(0), img->width(), img->height());
      
      for(unsigned int j = 1 ; j < list2->size(); j++)
	{
	  double temp = list1->get(i)->distance(list2->get(j), img->width(), img->height());
	  if(temp < min)
	    min = temp;
	}
      mins.push_back(min);
    }

  unsigned int minsize = this->size();
  if(list2->size() < minsize)
    minsize = list2->size();

  sort(mins.begin(), mins.end());
  
  for(unsigned int i = 0 ; i < minsize ; i++)
    sum+=mins[i];

  sum/=minsize;
  
  return std::make_pair(sum, size()-sllist->size());
}

std::pair<double, int> SLList::distance(SLList* sllist1, SLList* sllist2, QImage* img)
{
  std::pair<double, int> d1 = sllist1->distance_avg(sllist2, img);
  std::pair<double, int> d2 = sllist2->distance_avg(sllist1, img);

  return std::make_pair((std::get<0>(d1)+std::get<0>(d2))/2, std::get<1>(d1));
}

/*
std::pair<double, int> SLList::distance_hausdorff(SLList* sllist, QImage* img) const
{
  const SLList *list1 = this, *list2 = sllist;
  if(size() > sllist->size())
    {
      list1 = sllist;
      list2 = this;
    }

  double max = -1;
  double min;

  for(unsigned int i = 0 ; i < list1->size(); i++)
    {
      min = list1->get(i)->distance(list2->get(0), img->width(), img->height());
      
      for(unsigned int j = 1 ; j < list2->size(); j++)
	{
	  double temp = list1->get(i)->distance(list2->get(j), img->width(), img->height());
	  if(temp < min)
	    min = temp;
	}
      if(max<0)
	max = min;
      else
	if(min>max)
	  max=min;
    }
  return std::make_pair(max, size()-sllist->size());
}
*/