#include "Display.h"
#include "Bitmap.h"
#include "Glut/glut.h"
#include "GL/gl.h"
#include "GL/glu.h"
#include "PoolLight.h"

unsigned int Display::_textureHandles[_textureCount];

void Display::Init(int argc, char ** argv)
{
	glutInit(&argc, argv); // initializes glut
	// sets display mode. These parameter set RGB colour model
	// and double buffering.
	glutInitWindowSize(800, 600);
	glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
	glutCreateWindow("200886396 - 3D Pool");
	// Set glut callback functions
	glutDisplayFunc(Display::DisplayScene);
	glutIdleFunc(Display::Idle);
	glutReshapeFunc(Display::Resize);
	glutKeyboardFunc(Display::Keyboard);
	atexit(Display::Quit);

	glEnable(GL_TEXTURE_2D);
	glEnable(GL_DEPTH_TEST);
	glEnable(GL_LIGHTING);
	glPointSize(6);

	PoolLight spotlight = PoolLight(GL_LIGHT0, GL_DIFFUSE, 1, 1, 0.5, false, 0, 0, -4);
	spotlight.setSpotlight(10, 1, 0, 0, -1);
	spotlight = PoolLight(GL_LIGHT1, GL_DIFFUSE, 1, 1, 0.5, false, 0, 45, -4);
	spotlight.setSpotlight(10, 1, 0, 0, -1);
	spotlight = PoolLight(GL_LIGHT2, GL_DIFFUSE, 1, 1, 0.5, false, 0, -45, -4);
	spotlight.setSpotlight(10, 1, 0, 0, -1);
	

	glGenTextures(_textureCount, _textureHandles); //Generates 1 texture, puts the ID in m_TextureID
	//TODO: createTexture(Bitmap image, unsigned int textureID);
		
	// Begin glut main loop
	glutMainLoop();
	
}

void Display::createTexture(Bitmap image, unsigned int textureID) {
	glBindTexture(GL_TEXTURE_2D, textureID);

	glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);

	gluBuild2DMipmaps(GL_TEXTURE_2D, 3, image.width, image.height, GL_RGB, GL_UNSIGNED_BYTE, image.data); //Copy image to graphics card
}

void Display::DisplayScene()
{
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear the back buffer
	//glEnable(GL_TEXTURE_2D);
	
	drawPoolTable();
	drawPoolRim();
	drawPoolLegs();
	//drawLighting();
	//drawBalls();
	//drawCue();

	//glDisable(GL_TEXTURE_2D);

	glutSwapBuffers(); // Swap the front and back buffers
}

void Display::drawPoolTable() {
	//glBindTexture(GL_TEXTURE_2D, textureHandles[0]);

	glNormal3f(0, 0, 1); //Top face
	glBegin(GL_TRIANGLE_STRIP);
		for (int i = 90; i >= -90; i -= 10) {
			glColor3f(0, .5 + (float) abs(i) / 400, 0);
			glVertex3f(-45, i, -11);
			glVertex3f(45, i, -11);
		}
	glEnd();

	glNormal3f(-1, 0, 0); //Left face
	glBegin(GL_TRIANGLE_STRIP);
		for (int i = 90; i >= -90; i -= 10) {
			glColor3f(.3 + (float) abs(i) / 400, .15 + (float) abs(i) / 400, 0);
			glVertex3f(-45, i, -11);
			glVertex3f(-45, i, -51);
		}
	glEnd();

	glNormal3f(0, 1, 0); //Upper face
	glBegin(GL_TRIANGLE_STRIP);
		for (int i = 45; i >= -45; i -= 10) {
			glColor3f(.3 + (float) abs(i) / 200, .15 + (float) abs(i) / 200, 0);
			glVertex3f(i, 90, -11);
			glVertex3f(i, 90, -51);
		}
	glEnd();

	glNormal3f(1, 0, 0); //Right face
	glBegin(GL_TRIANGLE_STRIP);
		for (int i = 90; i >= -90; i -= 10) {
			glColor3f(.3 + (float) abs(i) / 400, .15 + (float) abs(i) / 400, 0);
			glVertex3f(45, i, -11);
			glVertex3f(45, i, -51);
		}
	glEnd();

	glNormal3f(0, -1, 0); //Lower face
	glBegin(GL_TRIANGLE_STRIP);
		for (int i = 45; i >= -45; i -= 10) {
			glColor3f(.3 + (float) abs(i) / 200, .15 + (float) abs(i) / 200, 0);
			glVertex3f(i, -90, -11);
			glVertex3f(i, -90, -51);
		}
	glEnd();

	glNormal3f(0, 0, -1); //Bottom face
	glBegin(GL_TRIANGLE_STRIP);
		for (int i = 90; i >= -90; i -= 10) {
			glColor3f(.3 + (float) abs(i) / 400, .15 + (float) abs(i) / 400, 0);
			glVertex3f(-45, i, -51);
			glVertex3f(45, i, -51);
		}
	glEnd();
}

void Display::drawPoolRim() {
	//glBindTexture(GL_TEXTURE_2D, textureHandles[0]);

	//Upper cuboid
	glBegin(GL_TRIANGLE_STRIP);
		glColor3f(0.2, 0, 0);
		//Top face
		glNormal3f(0, 0, 1);
		glVertex3f(-45, 90, -5);
		glVertex3f(45, 90, -5);
		glVertex3f(-45, 80, -5);
		glVertex3f(45, 80, -5);
		//Lower face
		glNormal3f(0, -1, 0);
		glVertex3f(-45, 80, -11);
		glVertex3f(45, 80, -11);
		//Bottom face
		glNormal3f(0, 0, -1);
		glVertex3f(-45, 90, -11);
		glVertex3f(45, 90, -11);
		//Upper face
		glNormal3f(0, 1, 0);
		glVertex3f(-45, 90, -5);
		glVertex3f(45, 90, -5);
	glEnd();
	glBegin(GL_QUADS);
		//Left face
		glNormal3f(-1, 0, 0);
		glVertex3f(-45, 90, -5);
		glVertex3f(-45, 80, -5);
		glVertex3f(-45, 80, -11);
		glVertex3f(-45, 90, -11);
		//Right face
		glNormal3f(1, 0, 0);
		glVertex3f(45, 90, -5);
		glVertex3f(45, 80, -5);
		glVertex3f(45, 80, -11);
		glVertex3f(45, 90, -11);
	glEnd();

	//Lower cuboid
	glBegin(GL_TRIANGLE_STRIP);
		glColor3f(0.2, 0, 0);
		//Top face
		glNormal3f(0, 0, 1);
		glVertex3f(-45, -90, -5);
		glVertex3f(45, -90, -5);
		glVertex3f(-45, -80, -5);
		glVertex3f(45, -80, -5);
		//Lower face
		glNormal3f(0, -1, 0);
		glVertex3f(-45, -80, -11);
		glVertex3f(45, -80, -11);
		//Bottom face
		glNormal3f(0, 0, -1);
		glVertex3f(-45, -90, -11);
		glVertex3f(45, -90, -11);
		//Upper face
		glNormal3f(0, 1, 0);
		glVertex3f(-45, -90, -5);
		glVertex3f(45, -90, -5);
	glEnd();
	glBegin(GL_QUADS);
		//Left face
		glNormal3f(-1, 0, 0);
		glVertex3f(-45, -90, -5);
		glVertex3f(-45, -80, -5);
		glVertex3f(-45, -80, -11);
		glVertex3f(-45, -90, -11);
		//Right face
		glNormal3f(1, 0, 0);
		glVertex3f(45, -90, -5);
		glVertex3f(45, -80, -5);
		glVertex3f(45, -80, -11);
		glVertex3f(45, -90, -11);
	glEnd();

	//Left cuboid
	glBegin(GL_TRIANGLE_STRIP);
		glColor3f(0.2, 0, 0);
		//Top face
		glNormal3f(0, 0, 1);
		glVertex3f(-35, 80, -5);
		glVertex3f(-45, 80, -5);
		glVertex3f(-35, -80, -5);
		glVertex3f(-45, -80, -5);
		//Lower face
		glNormal3f(0, -1, 0);
		glVertex3f(-35, -80, -11);
		glVertex3f(-45, -80, -11);
		//Bottom face
		glNormal3f(0, 0, -1);
		glVertex3f(-35, -80, -11);
		glVertex3f(-45, 80, -11);
		//Upper face
		glNormal3f(0, 1, 0);
		glVertex3f(-35, 80, -5);
		glVertex3f(-45, 80, -5);
	glEnd();
	glBegin(GL_QUADS);
		//Left face
		glNormal3f(-1, 0, 0);
		glVertex3f(-45, 80, -5);
		glVertex3f(-45, -80, -5);
		glVertex3f(-45, -80, -11);
		glVertex3f(-45, 80, -11);
		//Right face
		glNormal3f(1, 0, 0);
		glVertex3f(-35, 80, -5);
		glVertex3f(-35, -80, -5);
		glVertex3f(-35, -80, -11);
		glVertex3f(-35, 80, -11);
	glEnd();

	//Right cuboid
	glBegin(GL_TRIANGLE_STRIP);
		glColor3f(0.2, 0, 0);
		//Top face
		glNormal3f(0, 0, 1);
		glVertex3f(35, 80, -5);
		glVertex3f(45, 80, -5);
		glVertex3f(35, -80, -5);
		glVertex3f(45, -80, -5);
		//Lower face
		glNormal3f(0, -1, 0);
		glVertex3f(35, -80, -11);
		glVertex3f(45, -80, -11);
		//Bottom face
		glNormal3f(0, 0, -1);
		glVertex3f(35, -80, -11);
		glVertex3f(45, 80, -11);
		//Upper face
		glNormal3f(0, 1, 0);
		glVertex3f(35, 80, -5);
		glVertex3f(45, 80, -5);
	glEnd();
	glBegin(GL_QUADS);
		//Left face
		glNormal3f(-1, 0, 0);
		glVertex3f(45, 80, -5);
		glVertex3f(45, -80, -5);
		glVertex3f(45, -80, -11);
		glVertex3f(45, 80, -11);
		//Right face
		glNormal3f(1, 0, 0);
		glVertex3f(35, 80, -5);
		glVertex3f(35, -80, -5);
		glVertex3f(35, -80, -11);
		glVertex3f(35, 80, -11);
	glEnd();

}

void Display::drawPoolLegs() {
	//glBindTexture(GL_TEXTURE_2D, textureHandles[0]);

	 //Upper Left Leg
	glBegin(GL_TRIANGLE_STRIP);
		//Upper face
		glNormal3f(0, 1, 0);
		glVertex3f(-45, 90, -51);
		glVertex3f(-45, 90, -151);
		glVertex3f(-25, 90, -51);
		glVertex3f(-25, 80, -151);
		//Right face
		glNormal3f(1, 0, 0);
		glVertex3f(-25, 65, -51);
		glVertex3f(-25, 65, -151);
		//Lower face
		glNormal3f(0, -1, 0);
		glVertex3f(-45, 65, -51);
		glVertex3f(-45, 65, -151);
		//Left face
		glNormal3f(-1, 0, 0);
		glVertex3f(-45, 90, -51);
		glVertex3f(-45, 90, -151);
	glEnd();

	 //Upper Right Leg
	glBegin(GL_TRIANGLE_STRIP);
		//Upper face
		glNormal3f(0, 1, 0);
		glVertex3f(45, 90, -51);
		glVertex3f(45, 90, -151);
		glVertex3f(25, 90, -51);
		glVertex3f(25, 80, -151);
		//Right face
		glNormal3f(1, 0, 0);
		glVertex3f(25, 65, -51);
		glVertex3f(25, 65, -151);
		//Lower face
		glNormal3f(0, -1, 0);
		glVertex3f(45, 65, -51);
		glVertex3f(45, 65, -151);
		//Left face
		glNormal3f(-1, 0, 0);
		glVertex3f(45, 90, -51);
		glVertex3f(45, 90, -151);
	glEnd();

	 //Lower Left Leg
	glBegin(GL_TRIANGLE_STRIP);
		//Upper face
		glNormal3f(0, 1, 0);
		glVertex3f(-45, -90, -51);
		glVertex3f(-45, -90, -151);
		glVertex3f(-25, -90, -51);
		glVertex3f(-25, -80, -151);
		//Right face
		glNormal3f(1, 0, 0);
		glVertex3f(-25, -65, -51);
		glVertex3f(-25, -65, -151);
		//Lower face
		glNormal3f(0, -1, 0);
		glVertex3f(-45, -65, -51);
		glVertex3f(-45, -65, -151);
		//Left face
		glNormal3f(-1, 0, 0);
		glVertex3f(-45, -90, -51);
		glVertex3f(-45, -90, -151);
	glEnd();

	 //Lower Right Leg
	glBegin(GL_TRIANGLE_STRIP);
		//Upper face
		glNormal3f(0, 1, 0);
		glVertex3f(45, -90, -51);
		glVertex3f(45, -90, -151);
		glVertex3f(25, -90, -51);
		glVertex3f(25, -80, -151);
		//Right face
		glNormal3f(1, 0, 0);
		glVertex3f(25, -65, -51);
		glVertex3f(25, -65, -151);
		//Lower face
		glNormal3f(0, -1, 0);
		glVertex3f(45, -65, -51);
		glVertex3f(45, -65, -151);
		//Left face
		glNormal3f(-1, 0, 0);
		glVertex3f(45, -90, -51);
		glVertex3f(45, -90, -151);
	glEnd();

	
}

void Display::Resize(int w, int h)
{
	/* Resize is called when window is resized */
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	glViewport(0,0,w,h);
	gluPerspective(85, (float)w/(float)h, 1, 1000);
	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();
	gluLookAt(0, 0, 80, //Camera location
		0, 0, -1, //Where to look at
		1, 0, 0); //Camera 'up' direction
}

void Display::Idle()
{
	/* When nothing else is happening, idle is called.
	 * Simulation should be done here and then
	 * the display method should be called
	 */
	glutPostRedisplay();
}

void Display::Keyboard(unsigned char key, int x, int y) {
	//Look();
}

void Display::Look() {

}

void Display::Quit() {
	glDeleteTextures(_textureCount, _textureHandles);
}