/*
 * vim:ts=8:sw=3:sts=8:noexpandtab:cino=>5n-3f0^-2{2
 */
#include "e.h"
#include "e_mod_main.h"

#define POPUP_DEBOUNCE_CYCLES  2

/* 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,
     "battery",
     {
        _gc_init, _gc_shutdown, _gc_orient, _gc_label, _gc_icon, _gc_id_new, NULL
     },
   E_GADCON_CLIENT_STYLE_PLAIN
};

/* actual module specifics */
typedef struct _Instance Instance;

struct _Instance
{
   E_Gadcon_Client *gcc;
   Evas_Object     *o_battery;
   Evas_Object     *popup_battery;
   E_Gadcon_Popup  *warning;
};

static int _battery_cb_exe_data(void *data, int type, void *event);
static int _battery_cb_exe_del(void *data, int type, void *event);
static void _button_cb_mouse_down(void *data, Evas *e, Evas_Object *obj, void *event_info);
static void _menu_cb_post(void *data, E_Menu *m);
static void _battery_face_level_set(Evas_Object *battery, double level);
static void _battery_face_time_set(Evas_Object *battery, int time);
static void _battery_face_cb_menu_configure(void *data, E_Menu *m, E_Menu_Item *mi);

static void _battery_cb_warning_popup_hide(void *data, Evas *e, Evas_Object *obj, void *event);
static void _battery_warning_popup_resize(Evas_Object *obj, int *w, int *h);
static int  _battery_warning_popup_destroy(void *data);
static void _battery_warning_popup(Instance *inst, int time, double percent);

static E_Config_DD *conf_edd = NULL;

Config *battery_config = NULL;

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;

   battery_config->full = -2;
   battery_config->time_left = -2;
   battery_config->have_battery = -2;
   battery_config->have_power = -2;

   inst = E_NEW(Instance, 1);

   o = edje_object_add(gc->evas);
   e_theme_edje_object_set(o, "base/theme/modules/battery",
			   "e/modules/battery/main");

   gcc = e_gadcon_client_new(gc, name, id, style, o);
   gcc->data = inst;

   inst->gcc = gcc;
   inst->o_battery = o;   
   inst->warning = NULL;
   inst->popup_battery = NULL;

   evas_object_event_callback_add(o, EVAS_CALLBACK_MOUSE_DOWN,
				  _button_cb_mouse_down, inst);
   battery_config->instances = 
     evas_list_append(battery_config->instances, inst);
   _battery_config_updated();

   return gcc;
}

static void
_gc_shutdown(E_Gadcon_Client *gcc)
{
   Instance *inst;

   inst = gcc->data;
   battery_config->instances = 
     evas_list_remove(battery_config->instances, inst);
   evas_object_del(inst->o_battery);
   if(inst->warning)
     {
        e_object_del(E_OBJECT(inst->warning));
        inst->popup_battery = NULL;
     }
   E_FREE(inst);
}

static void
_gc_orient(E_Gadcon_Client *gcc)
{
   Instance *inst;
   Evas_Coord mw, mh;

   inst = gcc->data;
   mw = 0, mh = 0;
   edje_object_size_min_get(inst->o_battery, &mw, &mh);
   if ((mw < 1) || (mh < 1))
     edje_object_size_min_calc(inst->o_battery, &mw, &mh); 
   if (mw < 4) mw = 4;
   if (mh < 4) mh = 4;
   e_gadcon_client_aspect_set(gcc, mw, mh);
   e_gadcon_client_min_size_set(gcc, mw, mh);
}

static char *
_gc_label(void)
{
   return _("Battery");
}

static Evas_Object *
_gc_icon(Evas *evas)
{
   Evas_Object *o;
   char buf[4096];

   o = edje_object_add(evas);
   snprintf(buf, sizeof(buf), "%s/e-module-battery.edj",
	    e_module_dir_get(battery_config->module));
   edje_object_file_set(o, buf, "icon");
   return o;
}

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

static void
_button_cb_mouse_down(void *data, Evas *e, Evas_Object *obj, void *event_info)
{
   Instance *inst;
   Evas_Event_Mouse_Down *ev;

   inst = data;
   ev = event_info;
   if ((ev->button == 3) && (!battery_config->menu))
     {
	E_Menu *mn;
	E_Menu_Item *mi;
	int cx, cy, cw, ch;

	mn = e_menu_new();
	e_menu_post_deactivate_callback_set(mn, _menu_cb_post, inst);
	battery_config->menu = mn;

	mi = e_menu_item_new(mn);
	e_menu_item_label_set(mi, _("Configuration"));
	e_util_menu_item_edje_icon_set(mi, "enlightenment/configuration");   
	e_menu_item_callback_set(mi, _battery_face_cb_menu_configure, NULL);

	e_gadcon_client_util_menu_items_append(inst->gcc, mn, 0);

	e_gadcon_canvas_zone_geometry_get(inst->gcc->gadcon,
					  &cx, &cy, &cw, &ch);
	e_menu_activate_mouse(mn,
			      e_util_zone_current_get(e_manager_current_get()),
			      cx + ev->output.x, cy + ev->output.y, 1, 1,
			      E_MENU_POP_DIRECTION_DOWN, ev->timestamp);
	e_util_evas_fake_mouse_up_later(inst->gcc->gadcon->evas,
					ev->button);
     }
   if (ev->button == 1)
     _battery_cb_warning_popup_hide(data, e, obj, event_info);
}

static void
_menu_cb_post(void *data, E_Menu *m)
{
   if (!battery_config->menu) return;
   e_object_del(E_OBJECT(battery_config->menu));
   battery_config->menu = NULL;
}

static void
_battery_face_level_set(Evas_Object *battery, double level)
{
   Edje_Message_Float msg;
   char buf[256];

   snprintf(buf, sizeof(buf), "%i%%", (int)(level*100.0));
   edje_object_part_text_set(battery, "e.text.reading", buf);

   if (level < 0.0) level = 0.0;
   else if (level > 1.0) level = 1.0;
   msg.val = level;
   edje_object_message_send(battery, EDJE_MESSAGE_FLOAT, 1, &msg);
}

static void _battery_face_time_set(Evas_Object *battery, int time_left)
{
   char buf[256];
   int hrs, mins;

   hrs = (time_left / 3600);
   mins = ((time_left) / 60 - (hrs * 60));
   snprintf(buf, sizeof(buf), "%i:%02i", hrs, mins);
   if (hrs < 0) hrs = 0;
   if (mins < 0) mins = 0;
   edje_object_part_text_set(battery, "e.text.time", buf);
}

static void 
_battery_face_cb_menu_configure(void *data, E_Menu *m, E_Menu_Item *mi) 
{
   if (!battery_config) return;
   if (battery_config->config_dialog) return;
   e_int_config_battery_module(m->zone->container, NULL);
}

void
_battery_config_updated(void)
{
   char buf[4096];

   if (!battery_config) return;
   if (battery_config->batget_exe)
     {
	ecore_exe_terminate(battery_config->batget_exe);
	ecore_exe_free(battery_config->batget_exe);
     }
   snprintf(buf, sizeof(buf),
	    "%s/%s/batget %i",
	    e_module_dir_get(battery_config->module), MODULE_ARCH,
	    battery_config->poll_interval);

   battery_config->batget_exe = 
     ecore_exe_pipe_run(buf, ECORE_EXE_PIPE_READ |
                        ECORE_EXE_PIPE_READ_LINE_BUFFERED |
                        ECORE_EXE_NOT_LEADER, NULL);
}

static int
_battery_warning_popup_destroy(void *data)
{
   Instance *inst;

   inst = data;
   if ((!inst) || (!inst->warning)) return;

   e_object_del(E_OBJECT(inst->warning));
   inst->warning = NULL;
   inst->popup_battery = NULL;

   return 0;
}

static void
_battery_cb_warning_popup_hide(void *data, Evas *e, Evas_Object *obj, void *event)
{
   Instance *inst = NULL;

   inst = (Instance *)data;
   if ((!inst) || (!inst->warning)) return;

   _battery_warning_popup_destroy(inst);
}

static void
_battery_warning_popup_resize(Evas_Object *obj, int *w, int *h)
{
   int mw, mh;

   edje_object_size_min_get(obj,&mw,&mh);
   if (w) *w = mw;
   if (h) *h = mh;
}

static void
_battery_warning_popup(Instance *inst, int time, double percent)
{
   Evas *e = NULL;
   Evas_Object *rect = NULL, *popup_bg = NULL;
   int x,y,w,h;

   if ((!inst) || (inst->warning)) return;

   inst->warning = e_gadcon_popup_new(inst->gcc, _battery_warning_popup_resize);
   if (!inst->warning) return;

   e = inst->warning->win->evas;

   popup_bg = edje_object_add(e);
   inst->popup_battery = edje_object_add(e);
     
   if ((!popup_bg) || (!inst->popup_battery))
     {
        e_object_free(E_OBJECT(inst->warning));
        inst->warning = NULL;
        return;
     }

   e_theme_edje_object_set(popup_bg, "base/theme/modules/battery/popup",
     "e/modules/battery/popup");
   e_theme_edje_object_set(inst->popup_battery, "base/theme/modules/battery",
     "e/modules/battery/main");
   edje_object_part_swallow(popup_bg, "battery", inst->popup_battery);

   e_gadcon_popup_content_set(inst->warning, popup_bg);
   e_gadcon_popup_show(inst->warning);

   evas_object_geometry_get(inst->warning->o_bg, &x, &y, &w, &h);

   rect = evas_object_rectangle_add(e);
   if (rect)
     {
        evas_object_move(rect, x, y);
        evas_object_resize(rect, w, h);
        evas_object_color_set(rect, 255, 255, 255, 0);
        evas_object_event_callback_add(rect, EVAS_CALLBACK_MOUSE_DOWN , 
                                       _battery_cb_warning_popup_hide, inst);
        evas_object_repeat_events_set(rect, 1);
        evas_object_show(rect);
     }

   _battery_face_time_set(inst->popup_battery, time);
   _battery_face_level_set(inst->popup_battery, percent);
   edje_object_signal_emit(inst->popup_battery, "e,state,discharging", "e");

   if (battery_config->alert_timeout) 
     {
        ecore_timer_add(battery_config->alert_timeout, 
                        _battery_warning_popup_destroy, inst);
     }
}

/* module setup */
EAPI E_Module_Api e_modapi = 
{
   E_MODULE_API_VERSION, "Battery"
};

EAPI void *
e_modapi_init(E_Module *m)
{
   char buf[4096];

   conf_edd = E_CONFIG_DD_NEW("Battery_Config", Config);
#undef T
#undef D
#define T Config
#define D conf_edd
   E_CONFIG_VAL(D, T, poll_interval, INT);
   E_CONFIG_VAL(D, T, alert, INT);
   E_CONFIG_VAL(D, T, alert_p, INT);
   E_CONFIG_VAL(D, T, alert_timeout, INT);

   battery_config = e_config_domain_load("module.battery", conf_edd);
   if (!battery_config)
     {
       battery_config = E_NEW(Config, 1);
       battery_config->poll_interval = 512;
       battery_config->alert = 30;
       battery_config->alert_p = 10;
       battery_config->alert_timeout = 0;
     }
   E_CONFIG_LIMIT(battery_config->poll_interval, 4, 4096);
   E_CONFIG_LIMIT(battery_config->alert, 0, 60);
   E_CONFIG_LIMIT(battery_config->alert_p, 0, 100);
   E_CONFIG_LIMIT(battery_config->alert_timeout, 0, 300);

   battery_config->module = m;
   battery_config->full = -2;
   battery_config->time_left = -2;
   battery_config->have_battery = -2;
   battery_config->have_power = -2;

   battery_config->batget_data_handler =
     ecore_event_handler_add(ECORE_EXE_EVENT_DATA,
			     _battery_cb_exe_data, NULL);
   battery_config->batget_del_handler =
     ecore_event_handler_add(ECORE_EXE_EVENT_DEL,
			     _battery_cb_exe_del, NULL);

   e_gadcon_provider_register(&_gadcon_class);

   snprintf(buf, sizeof(buf), "%s/e-module-battery.edj", e_module_dir_get(m));
   e_configure_registry_category_add("advanced", 80, _("Advanced"), NULL, 
                                     "enlightenment/advanced");
   e_configure_registry_item_add("advanced/battery", 100, _("Battery Meter"), 
                                 NULL, buf, e_int_config_battery_module);

   return m;
}

EAPI int
e_modapi_shutdown(E_Module *m)
{
   e_configure_registry_item_del("advanced/battery");
   e_configure_registry_category_del("advanced");
   e_gadcon_provider_unregister(&_gadcon_class);

   if (battery_config->batget_exe)
     {
	ecore_exe_terminate(battery_config->batget_exe);
	ecore_exe_free(battery_config->batget_exe);
	battery_config->batget_exe = NULL;
     }

   if (battery_config->batget_data_handler)
     {
	ecore_event_handler_del(battery_config->batget_data_handler);
	battery_config->batget_data_handler = NULL;
     }
   if (battery_config->batget_del_handler)
     {
	ecore_event_handler_del(battery_config->batget_del_handler);
	battery_config->batget_del_handler = NULL;
     }

   if (battery_config->config_dialog)
     e_object_del(E_OBJECT(battery_config->config_dialog));
   if (battery_config->menu)
     {
        e_menu_post_deactivate_callback_set(battery_config->menu, NULL, NULL);
	e_object_del(E_OBJECT(battery_config->menu));
	battery_config->menu = NULL;
     }
   free(battery_config);
   battery_config = NULL;
   E_CONFIG_DD_FREE(conf_edd);
   return 1;
}

EAPI int
e_modapi_save(E_Module *m)
{
   e_config_domain_save("module.battery", conf_edd, battery_config);
   return 1;
}

static int
_battery_cb_exe_data(void *data, int type, void *event)
{
   Ecore_Exe_Event_Data *ev;

   ev = event;
   if (ev->exe != battery_config->batget_exe) return 1;
   if ((ev->lines) && (ev->lines[0].line))
     {
	int i;

	for (i = 0; ev->lines[i].line; i++)
	  {
	     if (!strcmp(ev->lines[i].line, "ERROR"))
	       {
		  Evas_List *l;

		  for (l = battery_config->instances; l; l = l->next)
		    {
		       Instance *inst;

		       inst = l->data;
		       edje_object_signal_emit(inst->o_battery, 
                                               "e,state,unknown", "e");
		       edje_object_part_text_set(inst->o_battery, 
                                                 "e.text.reading", _("ERROR"));
		       edje_object_part_text_set(inst->o_battery, 
                                                 "e.text.time", _("ERROR"));

                       if (inst->popup_battery)
                         {
                            edje_object_signal_emit(inst->popup_battery, 
                                                    "e,state,unknown", "e");
                            edje_object_part_text_set(inst->popup_battery, 
                                                      "e.text.reading", _("ERROR"));
                            edje_object_part_text_set(inst->popup_battery, 
                                                      "e.text.time", _("ERROR"));
                         }
		    }
	       }
	     else
	       {
		  int full = 0;
		  int time_left = 0;
		  int have_battery = 0;
		  int have_power = 0;
		  Evas_List *l;
                  int mins, hrs;
                  static int debounce_popup = 0;

		  if (sscanf(ev->lines[i].line, "%i %i %i %i",
			     &full, &time_left, &have_battery, &have_power)
		      == 4)
		    {
		       for (l = battery_config->instances; l; l = l->next)
			 {
			    Instance *inst;

			    inst = l->data;
			    if (have_power != battery_config->have_power)
			      {
				 if (have_power)
				   edje_object_signal_emit(inst->o_battery, 
                                                           "e,state,charging", 
                                                           "e");
				 else
                                   {
                                      edje_object_signal_emit(inst->o_battery, 
                                                              "e,state,discharging", 
                                                              "e");
                                      if(inst->popup_battery)
                                        edje_object_signal_emit(inst->popup_battery, 
                                                                "e,state,discharging", "e");
                                   }
			      }
			    if (have_battery)
			      {
                                 if (battery_config->full != full)
                                   {
                                      _battery_face_level_set(inst->o_battery, 
                                                              (double)full / 100.0);
                                      if(inst->popup_battery)
                                        _battery_face_level_set(inst->popup_battery, 
                                                                (double)full / 100.0);
                                   }
			      }
			    else
                              {
                                 _battery_face_level_set(inst->o_battery, 0.0);
                                 edje_object_part_text_set(inst->o_battery, 
                                                           "e.text.reading", 
                                                           _("N/A"));
                              }

			    if (time_left != battery_config->time_left)
                              {
                                 _battery_face_time_set(inst->o_battery, time_left);
                                 if(inst->popup_battery)
                                   _battery_face_time_set(inst->popup_battery, 
                                                          time_left);
                              }

                            if (have_battery && !have_power && (full != 100) &&
                                ((battery_config->alert && ((time_left/60) <= battery_config->alert)) || 
                                 (battery_config->alert_p && (full <= battery_config->alert_p)))
                               )
                              {
                                 if (++debounce_popup == POPUP_DEBOUNCE_CYCLES)
                                   _battery_warning_popup(inst, time_left, (double)full/100.0);
                              }
                            else if (have_power)
                              {
                                 _battery_warning_popup_destroy(inst);
                                 debounce_popup = 0;
                              }
			 }
		       if (!have_battery)
			 e_powersave_mode_set(E_POWERSAVE_MODE_LOW);
		       else
			 {
			    if ((have_power) || (full > 95))
			      e_powersave_mode_set(E_POWERSAVE_MODE_LOW);
			    else if (full > 30)
			      e_powersave_mode_set(E_POWERSAVE_MODE_HIGH);
			    else
			      e_powersave_mode_set(E_POWERSAVE_MODE_EXTREME);
			 }
		    }
		  else
		    e_powersave_mode_set(E_POWERSAVE_MODE_LOW);
		  battery_config->full = full;
		  battery_config->time_left = time_left;
		  battery_config->have_battery = have_battery;
		  battery_config->have_power = have_power;
	       }
	  }
     }
   return 0;
}                          

static int
_battery_cb_exe_del(void *data, int type, void *event)
{
   Ecore_Exe_Event_Del *ev;

   ev = event;
   if (ev->exe != battery_config->batget_exe) return 1;
   battery_config->batget_exe = NULL;
   return 1;
}