#include <iostream>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xos.h>
#include <X11/Xatom.h>
#include <X11/extensions/XInput.h>
#include <X11/keysym.h>

int main(int argc, char* argv[])
{
  Display *display;
  Window root, window;

  int screennumber,width,height;
  XSizeHints *sizehints;
  XWMHints *wmhints;
  XClassHint *classhints;

  char *WinName = "Magellan 3D Controller";
  XTextProperty WindowName;
  GC wingc;
  XGCValues xgcvalues;

  XEvent report;

  XComposeStatus compose;
  KeySym keysym;

   sizehints  = XAllocSizeHints();
   wmhints    = XAllocWMHints();
   classhints = XAllocClassHint();
   if ( (sizehints==NULL) || (wmhints==NULL) || (classhints==NULL) )
    {
     fprintf( stderr, "Can't allocate memory! Exit ... \n" );
     exit( -1 );
    };

   display = XOpenDisplay( NULL );
   if ( display == NULL )
    {
     fprintf( stderr, "Can't open display! Exit ... \n");
     exit( -1 );
    };

   screennumber = DefaultScreen(display);
   width  = DisplayWidth(display,screennumber);
   height = DisplayHeight(display,screennumber);
   root   = DefaultRootWindow(display);
   window = XCreateSimpleWindow( display, root, 0,0, width/5*3,height/8, 20,
               BlackPixel(display,screennumber),
               WhitePixel(display,screennumber) );

   XStringListToTextProperty( &WinName, 1, &WindowName );
   XDeviceInfoPtr device_info, device;
   int num_dev;
   device_info = XListInputDevices(display, &num_dev);
   if (device_info) {
     for (int i = 0; i < num_dev; i++) {
       device=&device_info[i];
       std::cout << device->name << std::endl;
       if(!strcmp(device->name, "spaceball"))
       {
         XAnyClassPtr any;
         any = (XAnyClassPtr) device->inputclassinfo;
         XButtonInfoPtr b;
         XValuatorInfoPtr v;
         v = NULL;
         b = NULL;
         int btns;
         for (int j = 0; j < device->num_classes; j++) {
#if defined(__cplusplus) || defined(c_plusplus)
          switch (any->c_class) {
#else
          switch (any->class) {
#endif
          case ButtonClass:
            b = (XButtonInfoPtr) any;
            btns = b->num_buttons;
            std::cout << "num buttons: " << btns << std::endl;
            break;
          case ValuatorClass:
            v = (XValuatorInfoPtr) any;
            /* Sanity check: at least 6 valuators? */
            std::cout << "num axes: " << v->num_axes << std::endl;
            if (v->num_axes < 6)
            {
              std::cout << "Insufficient number of axes\n";
              exit(0);
            }
            XAxisInfoPtr a;
            a = (XAxisInfoPtr) ((char *) v + sizeof(XValuatorInfo));
            break;
          }
          any = (XAnyClassPtr) ((char *) any + any->length);
        }
        if (v) {
          std::cout << "GLUT should be happy\n";
          //__glutSpaceball = XOpenDevice(__glutDisplay, device->id);
        }
      }
    }
  }
}