#include <iostream>
#include "vgl.h"
#include "CameraClass.h"

extern float theta_G;
extern GLfloat worldRotateX_G, worldRotateY_G, worldRotateZ_G;
extern void reset(void);
extern void DoProjection();
extern bool ortho_G;
extern CameraClass camera_G;

using namespace std;

void SpecialKeypress(int key, int x, int y) {
   if(camera_G.SpecialKeypress(key)) {
       glutPostRedisplay();
   }
   return;
}

void KeyUp(unsigned char key, int x, int y) {
   return;
}

void SpecialUp(int key, int x, int y) {
   return;
}

bool DoAnimation = false;
int  delay = 1000/60;

void Animate(int value) {
   theta_G += 0.5;
   if(DoAnimation) {
       glutTimerFunc(delay, Animate,0);
   }
   glutPostRedisplay();
   return;
}

void StartAnimation() {
   glutTimerFunc(delay, Animate,0);
   DoAnimation = true;
   return;
}

void StopAnimation() {
   DoAnimation = false;;
   return;
}

void KeyHelp() {
    cout << endl;
    cout << "Keys " << endl;
    cout << "\tm\tStart Animation" << endl;
    cout << "\tM\tStop Animation" << endl;
    cout << "\tw\tAdd a wheel" << endl;
    cout << "\tq,Q\tQuit" << endl;
    cout << "\th,?\tHelp" << endl;
    cout << "\txX,yY,zZ\t +/- rotation about axis" << endl;
    cout << "\tr\treset" << endl;
    cout << "\tR\tRedisplay" << endl;
    camera_G.Usage();
    cout << endl;

    return;
}

void Keypress(unsigned char key, int x, int y) {
   static int state = 1;

   bool redisplay = false;

   if (camera_G.Keypress(key)) {
       redisplay = true;
   } else {
      switch (key) {

         case 'm': StartAnimation(); break;
         case 'M': StopAnimation(); break;
         case 'h': 
         case '?': KeyHelp(); break;

         case 'p': ortho_G = !ortho_G; DoProjection(); redisplay= true; break;
         case 'x': worldRotateX_G += 1; redisplay=true; break;
         case 'X': worldRotateX_G -= 1; redisplay=true; break;
         case 'y': worldRotateY_G += 1; redisplay=true; break;
         case 'Y': worldRotateY_G -= 1; redisplay=true; break;
         case 'z': worldRotateZ_G += 1; redisplay=true; break;
         case 'Z': worldRotateZ_G -= 1; redisplay=true; break;
         case 'Q': 
         case 'q': exit(0);

         case 'r': reset(); redisplay=true; break;
         case 'R': redisplay = true; break;
      } 
   }

   if (redisplay) {
      glutPostRedisplay();
   }

   return;
}