package com.jibberia.gl.asn2;

import org.lwjgl.input.Keyboard;
import org.lwjgl.opengl.Display;
import org.lwjgl.opengl.DisplayMode;
import org.lwjgl.opengl.GL11;

public class Flowers {
	private boolean done = false;
	private DisplayMode displayMode;
	boolean clear = true;
//	int numPetals;
	float rota = 0f;
	double[][] c = {
			{0.7, 0.4, 0.5},
			{1, .97, .17},
			{.17, .43, 1},
			{.92, .17, 1},
			{1, .4, .17}
	};
	
	public static void main(String args[]) {
		Flowers app = new Flowers();
		app.run();
	}

	public void run() {
		System.out.println("press return to generate more flowers");
		try {
			init();
			render();
			while (!done) {
				updateWindow();
				Display.update();
			}
			cleanup();
		} catch (Exception e) {
			e.printStackTrace();
			System.exit(0);
		}
	}

	private void init() throws Exception {
		initDisplay();
		initGL();
	}

	private void initDisplay() throws Exception {
		Display.setFullscreen(false);
		DisplayMode d[] = Display.getAvailableDisplayModes();
		for (int i = 0; i < d.length; i++) {
			if (d[i].getWidth() == 800 && d[i].getHeight() == 600 && d[i].getBitsPerPixel() == 32) {
				displayMode = d[i];
				break;
			}
		}
		Display.setDisplayMode(displayMode);
		Display.setTitle("Kevin's Flowers");
		Display.create();
	}
	
	private void updateWindow() {
		if (Keyboard.isKeyDown(Keyboard.KEY_ESCAPE)) {
			System.out.println("escape == quit.");
			done = true;
		} else if (Keyboard.isKeyDown(Keyboard.KEY_RETURN)) {
			render();
		}
		if (Display.isCloseRequested()) {
			done = true;
		}
		clear = !Keyboard.isKeyDown(Keyboard.KEY_SPACE);
	}

	public void updatePhysics() {
//		numPetals = (numPetals+1) % 30;
//		rota += .08f;
	}
	
	private void initGL() {
		GL11.glMatrixMode(GL11.GL_PROJECTION);
		GL11.glLoadIdentity();
		GL11.glOrtho(-400f, 400f, -300f, 300f, -100f, 100f);
		
		GL11.glMatrixMode(GL11.GL_MODELVIEW);
		
		GL11.glDisable(GL11.GL_DEPTH_TEST);
	}
	public void render() {
		if (clear)
			GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT);

		GL11.glLoadIdentity(); // unncessary with ortho?

		drawField();
		
		// draw flowers
		for(int i=0; i<(int)r(2, 20); i++) {
			GL11.glPushMatrix();
			{
				GL11.glTranslatef(r(-200,200), r(-200,200) , 0f);
				GL11.glRotatef(r(0,360), 0,0,1);
				float r = r(1,100);
				GL11.glScalef(r,r,r);
//				GL11.glColor3d(c[i][0], c[i][1], c[i][2]);
				GL11.glColor3f(r(),r(),r());
				int numPetals = (int) r(4,10);
				for (int j = 0; j < numPetals; j++) {
					GL11.glRotatef(360f/(float)numPetals, 0, 0, 1);
					drawPetal(.3f+1f/(float)numPetals);
				}
			}
			GL11.glPopMatrix();
		}
	}

	private void drawField() {
		GL11.glColor3d(0.58, 1, 0.39);
		GL11.glBegin(GL11.GL_POLYGON);
		{
			GL11.glVertex3f(1000, 1000,   1);
			GL11.glVertex3f(1000, -1000,  1);
			GL11.glVertex3f(-1000, -1000, 1);
			GL11.glVertex3f(-1000, 1000,  1);
		}
		GL11.glEnd();
	}
	public float r() {
		return r(0,1);
	}
	public float r(float lo, float hi) {
		return (float) Math.random()*(hi-lo) + lo;
	}

	public void drawPetal(float w) {
		GL11.glBegin(GL11.GL_POLYGON);
		{
			GL11.glVertex3f(0f, 0f, 0f);
			GL11.glVertex3f(w, 1.2f, 0f);
			GL11.glVertex3f(.7f*w, 1.5f, 0f);
			GL11.glVertex3f(.4f*w, 1.8f, 0f);
			GL11.glVertex3f(0f, 1.9f, 0f);
			GL11.glVertex3f(-.4f*w, 1.8f, 0f);
			GL11.glVertex3f(-.7f*w, 1.5f, 0f);
			GL11.glVertex3f(-w, 1.2f, 0f);
		}
		GL11.glEnd();
	}
	
	private void cleanup() {
		Display.destroy();
	}
}