#include "MapView3D.h"


#include "../model/MapModelElement.h"
#include "../model/MapModel.h"

#include "../3DGrid/GridModel.h"
#include "../3DGrid/GridRenderer.h"

MapView3D::MapView3D(QWidget *parent) : QGLWidget(parent) {

	rot.x = 45;
	rot.y = 0;
	rot.z = 45;

	center.x = 0;
	center.y = 0;
	center.z = 0;

	scale.x = 0.05f;
	scale.y = 0.05f;
	scale.z = 0.05f;

}


void MapView3D::initializeGL() {

	//setFormat(QGLFormat(QGL::SampleBuffers));

	QGLWidget::initializeGL();

	// culling, lighting, depth-test, ...
	glEnable(GL_DEPTH_TEST);
	glEnable(GL_CULL_FACE);
	glShadeModel(GL_SMOOTH);

	glEnable(GL_MULTISAMPLE);
//	glEnable(GL_LINE_SMOOTH);

	glEnable(GL_LIGHTING);
	glEnable(GL_LIGHT0);
	glEnable(GL_LIGHT1);

	GLfloat light0_position [] = {+5, 5, +5, 1};
	GLfloat light1_position [] = {-5, 5, -5, 1};

	glLightfv ( GL_LIGHT0, GL_POSITION, light0_position );
	glLightfv ( GL_LIGHT1, GL_POSITION, light1_position );

	GLfloat light_diffuse []={ 0.7, 0.7, 0.7, 1.0 };
	glLightfv ( GL_LIGHT0, GL_DIFFUSE, light_diffuse );
	glLightfv ( GL_LIGHT1, GL_DIFFUSE, light_diffuse );


	// otherwise scaling the scene kills lighting normals!
	glEnable(GL_NORMALIZE);

	// allow using glColor3(r,g,b)
	glEnable(GL_COLOR_MATERIAL);

//	GLfloat mat_specular[] = { 1.0, 1.0, 1.0, 1.0 };
//	GLfloat mat_shininess[] = { 50.0 };
//	glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
//	glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess);

	// background color
	qglClearColor(Qt::white);

}

void MapView3D::paintGL() {

	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

	glLoadIdentity();



	// 3) scale
	glScalef(scale.x, scale.y, scale.z);	

	// 2) rotate around center
	glRotatef(rot.x, 1.0, 0.0, 0.0);
	glRotatef(rot.z, 0.0, 1.0, 0.0);
	glRotatef(rot.y, 0.0, 0.0, 1.0);

	// 1) post translate (mouse moving)
	glTranslatef(center.x, center.z, center.y);

	// 0) swap the y axis
	//glScalef(+1, -1, +1);



//	// 1) translate into center
//	glTranslatef(tra.x, tra.y, tra.z);

	draw();


}

void MapView3D::resizeGL(int width, int height) {

	//int side = qMin(width, height);
	//glViewport((width - side) / 2, (height - side) / 2, side, side);

	glViewport(0, 0, width, height);

	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
#ifdef QT_OPENGL_ES_1
	//glOrthof(-2, +2, -2, +2, 1.0, 15.0);
#else
	//glOrtho(-2, +2, -2, +2, 1.0, 25.0);
	//glFrustum(-1,1, -1,1, 0.1,20);
	viewport.size.x = 2.0f;
	viewport.size.y = 2.0f * height / width;
	const float w = viewport.size.x;
	const float h = viewport.size.y;
	glOrtho(-w, +w, -h, +h, -20, +20);
	//glFrustum(+w, -w, -h, +h, -20, +20);
#endif
	glMatrixMode(GL_MODELVIEW);
}


void MapView3D::mousePressEvent(QMouseEvent* e) {
	mouse.btn = e->button();
	mouse.x = e->x();
	mouse.y = e->y();
	update();
}

void MapView3D::mouseMoveEvent(QMouseEvent* e) {
	float dx = mouse.x - e->x();
	float dy = mouse.y - e->y();
	if (mouse.btn == 1) {
		rot.z -= dx/2.0f;	// upward
		rot.x -= dy/2.0f;
	} else if (mouse.btn == 4) {
		Point3 vec(-dx / width() * 2 * viewport.size.x, 0, dy / height() * 2 * viewport.size.y);
		vec = vec.rot(rot.x/180*M_PI, rot.y/180*M_PI, rot.z/180*M_PI);
		vec /= scale;
		center += vec;
	}
	mouse.x = e->x();
	mouse.y = e->y();
	update();
}

void MapView3D::mouseReleaseEvent(QMouseEvent* e) {
	update();
}

void MapView3D::wheelEvent(QWheelEvent* e) {
	float f = e->delta() / 120.0f;
	scale *= (f > 0) ? (2) : (0.5);
	update();
}


void MapView3D::showFloorplan() {
	if (gridModel) {delete gridModel; gridModel = nullptr;}
	update();
}

void MapView3D::showGrid() {
	if (gridModel) {delete gridModel; gridModel = nullptr;}
	GridModel* gm = new GridModel();
	Floorplan::IndoorMap* im = getModel()->getMap();
	gm->rebuild(im);
	this->gridModel = gm;
	update();
}

void MapView3D::draw() {

	if (gridModel) {

		// show grid
		GridRenderer renderer(gridModel->getGrid());
		renderer.paintGL();

	} else {

		// show floorplan
		for (MapModelElement* el : getModel()->getVisibleElements()) {
			if (el->getMV3D()) {el->getMV3D()->paintGL();}
		}
	}

}