/*********************************************************************/
/*                                                                   */
/* 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 <QFile>
#include <QColor>
#include <QTextStream>
#include <QJsonObject>
#include <QJsonArray>
#include <QJsonDocument>
#include <QPalette>

#include <QDebug>
#include <QStringList>

#include <iostream>

#include "WorkArea.hpp"


WorkArea::WorkArea (int screenSizeX, int screenSizeY, QWidget * parent):QWidget(parent)
{
  this->screenSizeX = screenSizeX;
  this->screenSizeY = screenSizeY;
  this->setGeometry(0,0,screenSizeX,screenSizeY);

  QPalette pal = QPalette();
  pal.setColor(QPalette::Window, Qt::gray);

  this->setAutoFillBackground(true); 
  this->setPalette(pal);


  setFixedSize (screenSizeX, screenSizeY);
  
  indexPointClicked = -1;
}

WorkArea::~WorkArea ()
{
}





void
WorkArea::addSL (const StrengthLine *sl)
{
  liste_points << new QPoint((int)(sl->getP1()->x()), (int)(sl->getP1()->y()));
  liste_points << new QPoint((int)(sl->getP2()->x()), (int)(sl->getP2()->y()));
}


void
WorkArea::paintEvent (QPaintEvent * event)
{
  QPainter painter (this);
  paint (painter);
}

void
WorkArea::paint (QPainter & painter)
{
  for (int i = 0; i < liste_points.length (); i++)
    {
 
	  painter.setBrush (QBrush (Qt::green));
	  painter.setPen (QPen (Qt::black));
	  painter.drawEllipse (liste_points[i]->x () - taillePoint / 2,
			       liste_points[i]->y () - taillePoint / 2,
			       taillePoint, taillePoint);
    


      if ((i % 2) == 1)
	{
	  painter.setPen (QPen (Qt::red, epaisseurLigne));
	  std::pair < QPoint *, QPoint * >endPoints =
	    StrengthLine (liste_points[i - 1], liste_points[i]).interpolateToEdge (this->screenSizeX, this->screenSizeY);
	  QPoint *first = std::get < 0 > (endPoints);
	  QPoint *last = std::get < 1 > (endPoints);
	  painter.drawLine (*first,
			    *last);

	  painter.setBrush (QBrush (Qt::blue));
	  painter.setPen (QPen (Qt::blue));
	  painter.drawEllipse (*first,
			       taillePoint, taillePoint);
	  painter.drawEllipse (*last,
			       taillePoint, taillePoint);
	}

    }

}

void
WorkArea::mousePressEvent (QMouseEvent * event)
{
  // Est ce qu'on a cliqué sur un point existant ?
  indexPointClicked = -1;
  for (int i = 0; i < liste_points.length (); i++)
    {
      QPoint point = event->pos () - *(liste_points[i]);
      if (point.manhattanLength () < taillePoint)
	{
	  indexPointClicked = i;
	}
    }
  
  repaint ();
}

void
WorkArea::mouseMoveEvent (QMouseEvent * event)
{
  if (indexPointClicked != -1)
    {
      liste_points[indexPointClicked]->setX (event->x ());
      liste_points[indexPointClicked]->setY (event->y ());
    }
 
  repaint ();
}

void
WorkArea::mouseReleaseEvent (QMouseEvent * event)
{
  indexPointClicked = -1;

  emit click();
}

double
WorkArea::getDistance() const
{
  StrengthLine *sl1 = new StrengthLine(liste_points[0], liste_points[1]);
  StrengthLine *sl2 = new StrengthLine(liste_points[2], liste_points[3]);
  return sl1->ea_score(sl2, screenSizeX, screenSizeY);
}