#include <e.h>

/***************************************************************************/
typedef struct _Instance Instance;

struct _Instance
{
   E_Gadcon_Client *gcc;
   Evas_Object *obj;
   Ecore_Poller *poller;
   int on;
};

/***************************************************************************/
/**/
/* gadcon requirements */
static E_Gadcon_Client *_gc_init(E_Gadcon *gc, const char *name, const char *id, const char *style);
static void _gc_shutdown(E_Gadcon_Client *gcc);
static void _gc_orient(E_Gadcon_Client *gcc);
static char *_gc_label(void);
static Evas_Object *_gc_icon(Evas *evas);
static const char *_gc_id_new(void);
/* and actually define the gadcon class that this module provides (just 1) */
static const E_Gadcon_Client_Class _gadcon_class =
{
   GADCON_CLIENT_CLASS_VERSION,
     "illume-usb",
     {
	_gc_init, _gc_shutdown, _gc_orient, _gc_label, _gc_icon, _gc_id_new, NULL
     },
   E_GADCON_CLIENT_STYLE_PLAIN
};
static E_Module *mod = NULL;
/**/
/***************************************************************************/

static int _cb_poll(void *data);

/* called from the module core */
void
_e_mod_gad_usb_init(E_Module *m)
{
   mod = m;
   e_gadcon_provider_register(&_gadcon_class);
}

void
_e_mod_gad_usb_shutdown(void)
{
   e_gadcon_provider_unregister(&_gadcon_class);
   mod = NULL;
}

/* internal calls */
static Evas_Object *
_theme_obj_new(Evas *e, const char *custom_dir, const char *group)
{
   Evas_Object *o;
   
   o = edje_object_add(e);
   if (!e_theme_edje_object_set(o, "base/theme/modules/illume", group))
     {
	if (custom_dir)
	  {
	     char buf[PATH_MAX];
	     
	     snprintf(buf, sizeof(buf), "%s/illume.edj", custom_dir);
	     if (edje_object_file_set(o, buf, group))
	       {
		  printf("OK FALLBACK %s\n", buf);
	       }
	  }
     }
   return o;
}

static E_Gadcon_Client *
_gc_init(E_Gadcon *gc, const char *name, const char *id, const char *style)
{
   Evas_Object *o;
   E_Gadcon_Client *gcc;
   Instance *inst;
   
   inst = E_NEW(Instance, 1);
   o = _theme_obj_new(gc->evas, e_module_dir_get(mod),
		      "e/modules/illume/gadget/usb");
   evas_object_show(o);
   gcc = e_gadcon_client_new(gc, name, id, style, o);
   gcc->data = inst;
   inst->gcc = gcc;
   inst->obj = o;
   e_gadcon_client_util_menu_attach(gcc);

   inst->on = -1;
   inst->poller = ecore_poller_add(ECORE_POLLER_CORE, 16, _cb_poll, inst);
   
   return gcc;
}

static void
_gc_shutdown(E_Gadcon_Client *gcc)
{
   Instance *inst;
   
   inst = gcc->data;
   ecore_poller_del(inst->poller);
   evas_object_del(inst->obj);
   free(inst);
}

static void
_gc_orient(E_Gadcon_Client *gcc)
{
   Instance *inst;
   Evas_Coord mw, mh, mxw, mxh;
   
   inst = gcc->data;
   mw = 0, mh = 0;
   edje_object_size_min_get(inst->obj, &mw, &mh);
   edje_object_size_max_get(inst->obj, &mxw, &mxh);
   if ((mw < 1) || (mh < 1))
     edje_object_size_min_calc(inst->obj, &mw, &mh);
   if (mw < 4) mw = 4;
   if (mh < 4) mh = 4;
   if ((mxw > 0) && (mxh > 0))
     e_gadcon_client_aspect_set(gcc, mxw, mxh);
   e_gadcon_client_min_size_set(gcc, mw, mh);
}

static char *
_gc_label(void)
{
   return "USB (Illume)";
}

static Evas_Object *
_gc_icon(Evas *evas)
{
/* FIXME: need icon
   Evas_Object *o;
   char buf[4096];
   
   o = edje_object_add(evas);
   snprintf(buf, sizeof(buf), "%s/e-module-clock.edj",
	    e_module_dir_get(clock_module));
   edje_object_file_set(o, buf, "icon");
   return o;
 */
   return NULL;
}

static const char *
_gc_id_new(void)
{
   return _gadcon_class.name;
}

static int
_find_interface_class(int iclass)
{
   Ecore_List *devs;
   
   devs = ecore_file_ls("/sys/bus/usb/devices");
   if (devs)
     {
	char *name;
	
	while ((name = ecore_list_next(devs)))
	  {
	     char buf[PATH_MAX];
	     FILE *f;
	     
	     snprintf(buf, sizeof(buf), "%s/%s/%s",
		      "/sys/bus/usb/devices", name, "bInterfaceClass");
	     f = fopen(buf, "r");
	     if (f)
	       {
		  if (fgets(buf, sizeof(buf), f))
		    {
		       int id = -1;
		       
		       sscanf(buf, "%x", &id);
		       if (iclass == id)
			 {
			    ecore_list_destroy(devs);
			    fclose(f);
			    return 1;
			 }
		    }
		  fclose(f);
	       }
	  }
	ecore_list_destroy(devs);
     }
   return 0;
}

static int
_cb_poll(void *data)
{
   Instance *inst;
   int pon;
   
   inst = data;
   /* FIXME: get bt status and emit signal */
   pon = inst->on;
   inst->on = _find_interface_class(0x09);
   if (inst->on != pon)
     {
	if (inst->on)
	  edje_object_signal_emit(inst->obj, "e,state,active", "e");
	else
	  edje_object_signal_emit(inst->obj, "e,state,passive", "e");
     }
   return 1;
}