/****************************************************************************

 Copyright (C) 2002-2014 Gilles Debunne. All rights reserved.

 This file is part of the QGLViewer library version 2.6.4.

 http://www.libqglviewer.com - contact@libqglviewer.com

 This file may be used under the terms of the GNU General Public License 
 versions 2.0 or 3.0 as published by the Free Software Foundation and
 appearing in the LICENSE file included in the packaging of this file.
 In addition, as a special exception, Gilles Debunne gives you certain 
 additional rights, described in the file GPL_EXCEPTION in this package.

 libQGLViewer uses dual licensing. Commercial/proprietary software must
 purchase a libQGLViewer Commercial License.

 This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

*****************************************************************************/

#include "glview.h"
#include <iostream>
#include <qimage.h>


#if QT_VERSION >= 0x040000
# include <QMouseEvent>
#endif

using namespace qglviewer;

//********************************************************************//
//                    Methode de la classe mere                       //
//********************************************************************//

void GLView::init()
{
  setMouseBinding(Qt::NoModifiers, Qt::LeftButton, SELECT);
  setMouseBinding(Qt::NoModifiers, Qt::RightButton, CAMERA, ROTATE);

  glEnable(GL_CULL_FACE);
  /* lissage des couleurs sur les facettes */
  glShadeModel(GL_SMOOTH);
  /* activation de la normalisation des normales */
#ifdef GL_RESCALE_NORMAL  // OpenGL 1.2 Only...
  glEnable(GL_RESCALE_NORMAL);
#endif
  glDisable(GL_COLOR_MATERIAL);

  /* activation des sources */
  glEnable(GL_LIGHT0);
  glEnable(GL_LIGHT1);
  /* parametres des sources */
  static GLfloat pos_source[2][4] = { { 0.0, 0.0, 40.0, 0.8f }, { -40.0, 0.0, 0.0, 0.8f } };
  static GLfloat colorLight[2][4] = { { 1.0, 1.0, 1.0, 1.0 }, { 1.0, 1.0, 1.0, 1.0 } };
  /* Definition des sources: position */
  glLightfv(GL_LIGHT0, GL_POSITION, pos_source[0] );
  glLightfv(GL_LIGHT1, GL_POSITION, pos_source[1] );
  /* puis intensite diffuse et speculaire */
  glLightfv(GL_LIGHT0, GL_DIFFUSE, colorLight[0] );
  glLightfv(GL_LIGHT0, GL_SPECULAR, colorLight[1] );
  glLightfv(GL_LIGHT1, GL_DIFFUSE, colorLight[0] );
  glLightfv(GL_LIGHT1, GL_SPECULAR, colorLight[1] );

  /* Definition de la texture */
  QImage tex1, buf;
  if ( !buf.load( "bois.jpg" ) ) {
    qWarning( "Could not read image file, using single-color instead." );
  }
  else {
    /* Reglages des parametres de la texture */
    glTexParameteri ( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
    glTexParameteri ( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
    glTexParameteri ( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT );
    glTexParameteri ( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );
    glTexEnvf ( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
    /* Mise en memoire de la texture */
    glGenTextures ( 1, &texture_bois );
    glBindTexture ( GL_TEXTURE_2D, texture_bois );
    tex1 = QGLWidget::convertToGLFormat( buf );  // flipped 32bit RGBA
    gluBuild2DMipmaps( GL_TEXTURE_2D, 3, tex1.width(), tex1.height(), GL_RGBA, GL_UNSIGNED_BYTE, tex1.bits() );
    setofpiece->setTexture(texture_bois);
  }
}


void GLView::select(const QMouseEvent* e)
{
  const int SENSITIVITY = 2;
  const int NB_HITS_MAX = 64;

  GLdouble x = e->x();
  GLdouble y = e->y();

  GLuint hits[NB_HITS_MAX];

  glSelectBuffer(NB_HITS_MAX, hits);
  glRenderMode(GL_SELECT);
  glInitNames();

  // Loads the matrices
  glMatrixMode(GL_PROJECTION);
  glLoadIdentity();
  GLint viewport[4];
  camera()->getViewport(viewport);
  gluPickMatrix(x, y, SENSITIVITY, SENSITIVITY, viewport);

  camera()->loadProjectionMatrix(false);
  camera()->loadModelViewMatrix();

  // Render scene with objects ids
  // Init the name stack
  glInitNames();
  glPushName(255);

  // Draw the scene
  drawWithId();

  // Get the results
  GLint nb_hits = glRenderMode(GL_RENDER);
  // Interpret results
  unsigned int zMin = UINT_MAX;
  int selected = -1;
  for (int i=0; i<nb_hits; ++i) {
    if (hits[i*4+1] < zMin) {
      zMin = hits[i*4+1];
      selected = hits[i*4+3];
    }
  }

  // Apply selected fonction
  applySelection(selected);
}

//********************************************************************//
//                    Methode de la classe fille vue des pieces       //
//********************************************************************//
void GLViewPieces::applySelection(int select)
{
  if(select!=-1) {
    setofpiece->setSelected(select);
    updateGL();
    Q_EMIT changeJoueur();
  }
}

void GLViewPieces::draw()
{
  // on affiche les pieces
  glTranslatef(-6.5, -6.5, -1.5 );
  setofpiece->paint(false);
}

void GLViewPieces::init()
{
  GLView::init();

  setSceneRadius(12.0);
  camera()->setPosition(Vec(30, 30, 30));
  camera()->setUpVector(Vec(0,0,1));
  camera()->lookAt(sceneCenter());
  showEntireScene();
}

//********************************************************************//
//                    Methode de la class fille vue du plateau        //
//********************************************************************//
void GLViewJeu::applySelection(int select)
{
  if(select!=-1) {
    setofpiece->placeSelectedPiece(select);
    jeu.placePiece(select, setofpiece->getPiece());
    updateGL();
    Q_EMIT update();
    Q_EMIT piecePlacee();
    if(jeu.analyze()) Q_EMIT endGame();
  }
}

void GLViewJeu::init()
{
  GLView::init();

  /* decalage entre les facettes pleines et le maillage (pour les cases du plateau)  */
  glEnable(GL_POLYGON_OFFSET_LINE);

  makePlateau();
  jeu.init();

  setSceneCenter(Vec(9, 9, 0.5));
  setSceneRadius(10.0);
  camera()->setPosition(Vec(9, 35, 20));
  camera()->setUpVector(Vec(0,0,1));
  camera()->lookAt(sceneCenter());
  showEntireScene();
}

void GLViewJeu::draw()
{
  // On affiche le plateau
  glCallList( plateau );
  // on affiche les pieces
  setofpiece->paint(true);
}

void GLViewJeu::drawWithId()
{
  float r=1.5;
  int dx=20, ix;
  double a,pasa =2.*M_PI/(double)dx,x,y;

  for(int i=0; i<16; i++)
    if(jeu.needDrawing(i)) {
      glPushMatrix();
      glTranslatef((i%4)*3.5+3.7 ,(i/4)*3.5+3.7 ,0. );
      glLoadName(i);
      glBegin(GL_TRIANGLE_FAN);
      glVertex3f(0. ,0. ,0.5);
      for (ix=0,a=0.0; ix<=dx; ix++,a+=pasa)
	{ x = r*cos(a);
	y = -r*sin(a);
	glVertex3d(x,y,0.5);
	}
      glEnd();
      glPopMatrix();
    }
}

void GLViewJeu::makePlateau()
{
  int i,j;
  float taille=18;
  static GLfloat amb_diff[] = { 0.15f, 0.15f, 0.15f };
  static GLfloat ambiant[] = { 0.85f, 0.4f, 0.35f };
  static GLfloat specular1[] = { 0.3f, 0.3f, 0.3f };
  static GLfloat specular2[] = { 0.0, 0.0, 0.0 };
  static GLfloat shininess = 120.0;

  plateau = glGenLists( 1 );
  glNewList( plateau, GL_COMPILE );
  glPushMatrix();
  glTranslatef(9, 9, 0 );
  glRotatef( 45, 0, 0, 1 );
  glScalef( 1.1f, 1.1f, 1 );
  glTranslatef(-9, -9, 0 );
  // Couleur noire du plateau
  glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, amb_diff);
  glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, specular1);
  glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, shininess);

  // dessous du plateau
  glNormal3d(0, 0, -1);
  for (j=0; j<taille; j++) {
    glBegin(GL_QUAD_STRIP);
    for (i=0; i<=taille; i++) {
      glVertex3d( i, j  , 0 );
      glVertex3d( i, j+1, 0 );
    }
    glEnd();
  }

  // dessus du plateau
  glNormal3d(0, 0, 1);
  for (j=0; j<taille; j++) {
    glBegin(GL_QUAD_STRIP);
    for (i=0; i<=taille; i++) {
      glVertex3d( i, j+1, 0.5 );
      glVertex3d( i, j  , 0.5 );
    }
    glEnd();
  }
  // Couleur rose-orange des bords et des cercles
  glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, ambiant);
  glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, specular2);
  // cote gauche
  glNormal3d( 0, -1, 0 );
  glBegin(GL_QUAD_STRIP);
  for (i=0; i<=taille; i++) {
    glVertex3d( i, 0, 0.5 );
    glVertex3d( i, 0, 0   );
  }
  glEnd();
  // devant
  glNormal3d( 1, 0, 0 );
  glBegin(GL_QUAD_STRIP);
  for (i=0; i<=taille; i++) {
    glVertex3d( taille, i, 0.5 );
    glVertex3d( taille, i, 0   );
  }
  glEnd();

  // cote droit
  glNormal3d( 0, 1, 0 );
  glBegin(GL_QUAD_STRIP);
  for (i=0; i<=taille; i++) {
    glVertex3f( i, taille, 0   );
    glVertex3f( i, taille, 0.5 );
  }
  glEnd();
  // derriere
  glNormal3d( -1, 0, 0 );
  glBegin(GL_QUAD_STRIP);
  for (i=0; i<=taille; i++) {
    glVertex3d( 0, i, 0   );
    glVertex3d( 0, i, 0.5 );
  }
  glEnd();
  glPopMatrix();

  // cases du plateau
  glEnable(GL_LINE_SMOOTH);
  glLineWidth(2.);
  glNormal3d( 0, 0, 1 );

  float r=1.5, R=9.5;
  int dx=20, DX=40, ix;
  double a,pasa=2.*M_PI/(double)dx, pasA=2.*M_PI/(double)DX;
  double x,y;
  // Grand cercle
  glPushMatrix();
  glTranslatef(9, 9, 0 );
  glBegin(GL_LINE_LOOP);
  for (ix=0,a=0.0; ix<=DX; ix++,a+=pasA) {
    x = R*cos(a);
    y = R*sin(a);
    glVertex3d( x, y, 0.51 );
  }
  glEnd();
  glPopMatrix();
  // Petits cercles
  for(int i=0; i<16; i++) {
    glPushMatrix();
    glTranslatef((i%4)*3.5+3.7 ,(i/4)*3.5+3.7 ,0. );
    glBegin(GL_LINE_LOOP);
    for (ix=0,a=0.0; ix<=dx; ix++,a+=pasa) {
      x = r*cos(a);
      y = r*sin(a);
      glVertex3d( x, y, 0.51 );
    }
    glEnd();
    glPopMatrix();
  }
  glEndList();
}
