import org.lwjgl.BufferUtils;
import org.lwjgl.opengl.GL;
import java.nio.ByteBuffer;
import java.nio.IntBuffer;
import java.util.TimeZone;

import static org.lwjgl.glfw.GLFW.*;
import static org.lwjgl.opengl.GL11.*;
import static org.lwjgl.stb.STBImage.stbi_image_free;
import static org.lwjgl.stb.STBImage.stbi_load;


import java.util.Calendar;



public class Desafio02teste{

int SCREEN_WIDTH = 640;
int SCREEN_HEIGHT = 480;
int SCREEN_FPS = 60;

private static float mTextureWidth;
private static float mTextureHeight;
private static int id;


    public Desafio02teste(){

        if (!glfwInit()) {
            System.err.println("Falha ao inicializar GLFW!");
            System.exit(1);
        }

        long win = glfwCreateWindow(940, 940, "Window", 0, 0);

        glfwShowWindow(win);
        glfwMakeContextCurrent(win);
        GL.createCapabilities();
        glEnable(GL_TEXTURE_2D);


        while (!glfwWindowShouldClose(win)) {

        	Calendar cal = Calendar.getInstance();
        	cal.setTimeZone(TimeZone.getTimeZone("GMT-03:00"));
        	int hours = cal.get(Calendar.HOUR_OF_DAY);
        	int minutes = cal.get(Calendar.MINUTE);
        	int seconds = cal.get(Calendar.SECOND);
        	int millisecond = cal.get(Calendar.MILLISECOND);

        	glfwPollEvents();
            glClear(GL_COLOR_BUFFER_BIT);


      		IntBuffer width = BufferUtils.createIntBuffer(1);
      		IntBuffer height = BufferUtils.createIntBuffer(1);
      		IntBuffer comp = BufferUtils.createIntBuffer(1);
      		ByteBuffer data = stbi_load("res/clockimg.png" , width, height, comp, 4);
            id = glGenTextures();
      		glBindTexture(GL_TEXTURE_2D, id);
      		glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
      		glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
            glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width.get(), height.get(), 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
      		stbi_image_free(data);
      		mTextureWidth = width.get(0);
            mTextureHeight = height.get(0);

            glColor3f(1.0f, 1.0f, 1.0f);
            glBindTexture(GL_TEXTURE_2D, id);
            glBegin(GL_QUADS);
            glTexCoord2f(0,0);
            glVertex2f(-0.2f, 0.2f);
            glTexCoord2f(1,0);
            glVertex2f(0.2f, 0.2f);
            glTexCoord2f(1,1);
            glVertex2f(0.2f, -0.2f);
            glTexCoord2f(0,1);
            glVertex2f(-0.2f, -0.2f);
            glEnd();



            glPushMatrix();
            glRotatef(-hours * 30, 0.f, 0.f, 0.f);
            glBegin(GL_LINES);
            glColor3f( 0.f, 0.f, 0.f);
            glVertex2f(0,0);
            glVertex2f(0, 0.5f);
            glEnd();
            glPopMatrix();


            glfwSwapBuffers(win);

        }
        glfwTerminate();
    }

    public static void main(String[] args) {
        new Desafio02teste();
    }

}