#include <GL/gl.h>
#include <GL/glu.h>
#include <GL/glut.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include "glst.h"
#include "glstrb.h"
#include "stcontrol.h"

static GLfloat spin = 132.0;

void idlef();

void init(void) {
  GLfloat mat_specular[] = {1.0, 1.0, 1.0, 1.0};
  GLfloat mat_shininess[] = {50.0};
  GLfloat light_position[] = {1.0, 1.0, 1.0, 0.0};

  glClearColor(0.0, 0.0, 0.0, 0.0);
  glClearAccum(0.0, 0.0, 0.0, 0.0);
  glShadeModel(GL_SMOOTH);
  glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
  glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess);
  glLightfv(GL_LIGHT0, GL_POSITION, light_position);
  light_position[0] = -1.0;
  glLightfv(GL_LIGHT1, GL_POSITION, light_position);
  glEnable(GL_LIGHTING);
  glEnable(GL_LIGHT0);
  glEnable(GL_LIGHT1);
  glEnable(GL_DEPTH_TEST);
}

void display(void) {
  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  /*glstToggle(True);*/
  while(glstLoopRender()) {
    glPushMatrix();
    glRotatef(spin, 0.0, 0.0, 1.0);
    glRotatef(spin, 0.0, 1.0, 0.0);
    glColor3f(1.0, 1.0, 1.0);
    glutSolidCube(2.0);
    glPopMatrix();
  }
  glFlush();
  glutSwapBuffers();
}

void spinDisplay(void) {
  spin = spin + 2.0;
  if(spin > 360.0)
    spin -= 360.0;
  StControlGlutIdleFunc();
  glutPostRedisplay();
}

void reshape(int w, int h) {

  glViewport(0, 0, (GLsizei) w, (GLsizei) h);
  glMatrixMode(GL_PROJECTION);
  glLoadIdentity();
  gluPerspective(80.0, (GLfloat) w/ (GLfloat) h, 1.0, 200.0);
  glMatrixMode(GL_MODELVIEW);
  glLoadIdentity();
  glTranslatef(0.0, 0.0, -5.0);
  glutPostRedisplay();
}

void mouse(int button, int state, int x, int y) {
  switch(button) {
  case GLUT_LEFT_BUTTON:
    if(state == GLUT_DOWN)
      glutIdleFunc(spinDisplay);
    break;

  case GLUT_MIDDLE_BUTTON:
    if(state == GLUT_DOWN)
      glutIdleFunc(StControlGlutIdleFunc);
    break;

  default:
    break;
  }
}


int main(int argc, char ** argv) {

  glstrbAutoRegister();
  glstInit(GLSTRB);
  glstSetValuef(GLST_XDISPLACEMENT, 0.1);
  glstSetValuei(GLST_MODE, GLSTRB_ACCUM);
  StControlInit(&argc, argv, STCONTROLGLUT);
  glutInit(&argc, argv);
  glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_ACCUM | GLUT_DEPTH);
  glutInitWindowSize(250, 250);
  glutInitWindowPosition(100, 100);
  glutCreateWindow(argv[0]);
  init();
  glutDisplayFunc(display);
  glutReshapeFunc(reshape);
  glutMouseFunc(mouse);
  glutIdleFunc(StControlGlutIdleFunc);

  glutMainLoop();
  return 0;
}