#include <Elementary.h>
#include "elm_priv.h"

#define MIN_RATIO_LVL 0.0
#define MAX_RATIO_LVL 1.0

typedef struct _Widget_Data Widget_Data;

struct _Widget_Data
{
   Evas_Object *progressbar;
   Evas_Object *spacer;
   Evas_Object *icon;
   Evas_Coord size;
   Eina_Bool horizontal : 1;
   Eina_Bool inverted : 1;
   Eina_Bool pulse : 1;
   Eina_Bool pulse_state : 1;
   const char *units;
   const char *label;
   double val;
};

static const char *widtype = NULL;
static void _del_hook(Evas_Object *obj);
static void _mirrored_set(Evas_Object *obj, Eina_Bool rtl);
static void _theme_hook(Evas_Object *obj);
static void _sizing_eval(Evas_Object *obj);
static void _changed_size_hints(void *data, Evas *e, Evas_Object *obj, void *event_info);
static void _sub_del(void *data, Evas_Object *obj, void *event_info);
static void _units_set(Evas_Object *obj);
static void _val_set(Evas_Object *obj);

static void
_del_hook(Evas_Object *obj)
{
   Widget_Data *wd = elm_widget_data_get(obj);
   if (!wd) return;
   if (wd->label) eina_stringshare_del(wd->label);
   if (wd->units) eina_stringshare_del(wd->units);
   free(wd);
}

static void
_mirrored_set(Evas_Object *obj, Eina_Bool rtl)
{
   Widget_Data *wd = elm_widget_data_get(obj);
   if (!wd) return;
   edje_object_mirrored_set(wd->progressbar, rtl);
}

static void
_theme_hook(Evas_Object *obj)
{
   Widget_Data *wd = elm_widget_data_get(obj);
   if (!wd) return;
   _elm_widget_mirrored_reload(obj);
   _mirrored_set(obj, elm_widget_mirrored_get(obj));
   if (wd->horizontal)
     _elm_theme_object_set(obj, wd->progressbar, "progressbar", "horizontal", elm_widget_style_get(obj));
   else
     _elm_theme_object_set(obj, wd->progressbar, "progressbar", "vertical", elm_widget_style_get(obj));

   if (wd->icon)
     {
        edje_object_part_swallow(wd->progressbar, "elm.swallow.content", wd->icon);
        edje_object_signal_emit(wd->progressbar, "elm,state,icon,visible", "elm");
     }
   if (wd->label)
     {
        edje_object_part_text_set(wd->progressbar, "elm.text", wd->label);
        edje_object_signal_emit(wd->progressbar, "elm,state,text,visible", "elm");
     }
   if (wd->pulse)
     edje_object_signal_emit(wd->progressbar, "elm,state,pulse", "elm");
   else
     edje_object_signal_emit(wd->progressbar, "elm,state,fraction", "elm");
   if (wd->pulse_state)
     edje_object_signal_emit(wd->progressbar, "elm,state,pulse,start", "elm");

   if ((wd->units) && (!wd->pulse))
     edje_object_signal_emit(wd->progressbar, "elm,state,units,visible", "elm");

   if (wd->horizontal)
     evas_object_size_hint_min_set(wd->spacer, (double)wd->size * elm_widget_scale_get(obj) * _elm_config->scale, 1);
   else
     evas_object_size_hint_min_set(wd->spacer, 1, (double)wd->size * elm_widget_scale_get(obj) * _elm_config->scale);

   edje_object_part_swallow(wd->progressbar, "elm.swallow.bar", wd->spacer);

   if (wd->inverted)
     edje_object_signal_emit(wd->progressbar, "elm,state,inverted,on", "elm");

   _units_set(obj);
   edje_object_message_signal_process(wd->progressbar);
   edje_object_scale_set(wd->progressbar, elm_widget_scale_get(obj) * _elm_config->scale);
   _val_set(obj);
   _sizing_eval(obj);
}

static void
_sizing_eval(Evas_Object *obj)
{
   Widget_Data *wd = elm_widget_data_get(obj);
   Evas_Coord minw = -1, minh = -1;
   if (!wd) return;
   edje_object_size_min_restricted_calc(wd->progressbar, &minw, &minh, minw, minh);
   evas_object_size_hint_min_set(obj, minw, minh);
   evas_object_size_hint_max_set(obj, -1, -1);
}

static void
_changed_size_hints(void *data, Evas *e __UNUSED__, Evas_Object *obj, void *event_info __UNUSED__)
{
   Widget_Data *wd = elm_widget_data_get(data);
   if (!wd) return;
   if (obj != wd->icon) return;
   _sizing_eval(data);
}

static void
_sub_del(void *data __UNUSED__, Evas_Object *obj, void *event_info)
{
   Widget_Data *wd = elm_widget_data_get(obj);
   Evas_Object *sub = event_info;
   if (!wd) return;
   if (sub == wd->icon)
     {
        edje_object_signal_emit(wd->progressbar, "elm,state,icon,hidden", "elm");
        evas_object_event_callback_del_full
           (sub, EVAS_CALLBACK_CHANGED_SIZE_HINTS, _changed_size_hints, obj);
        wd->icon = NULL;
        edje_object_message_signal_process(wd->progressbar);
        _sizing_eval(obj);
     }
}

static void
_val_set(Evas_Object *obj)
{
   Widget_Data *wd = elm_widget_data_get(obj);
   Eina_Bool rtl;
   double pos;
   if (!wd) return;
   pos = wd->val;
   rtl = elm_widget_mirrored_get(obj);
   if ((!rtl && wd->inverted) || (rtl &&
                                  ((!wd->horizontal && wd->inverted) ||
                                   (wd->horizontal && !wd->inverted)))) pos = MAX_RATIO_LVL - pos;
   edje_object_part_drag_value_set(wd->progressbar, "elm.cur.progressbar", pos, pos);
}

static void
_units_set(Evas_Object *obj)
{
   Widget_Data *wd = elm_widget_data_get(obj);
   if (!wd) return;
   if (wd->units)
     {
        char buf[1024];
        snprintf(buf, sizeof(buf), wd->units, 100 * wd->val);
        edje_object_part_text_set(wd->progressbar, "elm.text.status", buf);
     }
   else
     edje_object_part_text_set(wd->progressbar, "elm.text.status", NULL);
}

static void
_elm_progressbar_label_set(Evas_Object *obj, const char *item, const char *label)
{
   ELM_CHECK_WIDTYPE(obj, widtype);
   Widget_Data *wd = elm_widget_data_get(obj);
   if (item && strcmp(item, "default")) return;
   if (!wd) return;
   eina_stringshare_replace(&wd->label, label);
   if (label)
     {
        edje_object_signal_emit(wd->progressbar, "elm,state,text,visible", "elm");
        edje_object_message_signal_process(wd->progressbar);
     }
   else
     {
        edje_object_signal_emit(wd->progressbar, "elm,state,text,hidden", "elm");
        edje_object_message_signal_process(wd->progressbar);
     }
   edje_object_part_text_set(wd->progressbar, "elm.text", label);
   _sizing_eval(obj);
}

static const char *
_elm_progressbar_label_get(const Evas_Object *obj, const char *item)
{
   ELM_CHECK_WIDTYPE(obj, widtype) NULL;
   Widget_Data *wd = elm_widget_data_get(obj);
   if (item && strcmp(item, "default")) return NULL;
   if (!wd) return NULL;
   return wd->label;
}

static void
_content_set_hook(Evas_Object *obj, const char *part, Evas_Object *content)
{
   ELM_CHECK_WIDTYPE(obj, widtype);
   Widget_Data *wd;
   if (part && strcmp(part, "icon")) return;
   wd = elm_widget_data_get(obj);
   if (!wd) return;
   if (wd->icon == content) return;
   if (wd->icon) evas_object_del(wd->icon);
   wd->icon = content;
   if (content)
     {
        elm_widget_sub_object_add(obj, content);
        evas_object_event_callback_add(content,
                                       EVAS_CALLBACK_CHANGED_SIZE_HINTS,
                                       _changed_size_hints, obj);
        edje_object_part_swallow(wd->progressbar, "elm.swallow.content", content);
        edje_object_signal_emit(wd->progressbar, "elm,state,icon,visible", "elm");
        edje_object_message_signal_process(wd->progressbar);
     }
   _sizing_eval(obj);
}

static Evas_Object *
_content_get_hook(const Evas_Object *obj, const char *part)
{
   ELM_CHECK_WIDTYPE(obj, widtype) NULL;
   Widget_Data *wd;
   if (part && strcmp(part, "icon")) return NULL;
   wd = elm_widget_data_get(obj);
   if (!wd) return NULL;
   return wd->icon;
}

static Evas_Object *
_content_unset_hook(Evas_Object *obj, const char *part)
{
   ELM_CHECK_WIDTYPE(obj, widtype) NULL;
   Widget_Data *wd;
   Evas_Object *icon;
   if (part && strcmp(part, "icon")) return NULL;
   wd = elm_widget_data_get(obj);
   if (!wd) return NULL;
   if (!wd->icon) return NULL;
   icon = wd->icon;
   elm_widget_sub_object_del(obj, wd->icon);
   evas_object_event_callback_add(icon, EVAS_CALLBACK_CHANGED_SIZE_HINTS,
                                  _changed_size_hints, obj);
   edje_object_part_unswallow(wd->progressbar, wd->icon);
   wd->icon = NULL;
   return icon;
}


EAPI Evas_Object *
elm_progressbar_add(Evas_Object *parent)
{
   Evas_Object *obj;
   Evas *e;
   Widget_Data *wd;

   ELM_WIDGET_STANDARD_SETUP(wd, Widget_Data, parent, e, obj, NULL);

   ELM_SET_WIDTYPE(widtype, "progressbar");
   elm_widget_type_set(obj, "progressbar");
   elm_widget_sub_object_add(parent, obj);
   elm_widget_data_set(obj, wd);
   elm_widget_del_hook_set(obj, _del_hook);
   elm_widget_theme_hook_set(obj, _theme_hook);
   elm_widget_can_focus_set(obj, EINA_FALSE);
   elm_widget_text_set_hook_set(obj, _elm_progressbar_label_set);
   elm_widget_text_get_hook_set(obj, _elm_progressbar_label_get);
   elm_widget_content_set_hook_set(obj, _content_set_hook);
   elm_widget_content_get_hook_set(obj, _content_get_hook);
   elm_widget_content_unset_hook_set(obj, _content_unset_hook);

   wd->horizontal = EINA_TRUE;
   wd->inverted = EINA_FALSE;
   wd->pulse = EINA_FALSE;
   wd->pulse_state = EINA_FALSE;
   wd->units = eina_stringshare_add("%.0f %%");
   wd->val = MIN_RATIO_LVL;

   wd->progressbar = edje_object_add(e);
   _elm_theme_object_set(obj, wd->progressbar, "progressbar", "horizontal", "default");
   elm_widget_resize_object_set(obj, wd->progressbar);

   wd->spacer = evas_object_rectangle_add(e);
   evas_object_color_set(wd->spacer, 0, 0, 0, 0);
   evas_object_pass_events_set(wd->spacer, EINA_TRUE);
   elm_widget_sub_object_add(obj, wd->spacer);
   edje_object_part_swallow(wd->progressbar, "elm.swallow.bar", wd->spacer);

   evas_object_smart_callback_add(obj, "sub-object-del", _sub_del, obj);
   _units_set(obj);
   _val_set(obj);
   _mirrored_set(obj, elm_widget_mirrored_get(obj));
   _sizing_eval(obj);
   return obj;
}

EAPI void
elm_progressbar_pulse_set(Evas_Object *obj, Eina_Bool pulse)
{
   ELM_CHECK_WIDTYPE(obj, widtype);
   Widget_Data *wd = elm_widget_data_get(obj);
   if (!wd) return;
   pulse = !!pulse;
   if (wd->pulse == pulse) return;
   wd->pulse = pulse;
   _theme_hook(obj);
}

EAPI Eina_Bool
elm_progressbar_pulse_get(const Evas_Object *obj)
{
   ELM_CHECK_WIDTYPE(obj, widtype) EINA_FALSE;
   Widget_Data *wd = elm_widget_data_get(obj);
   if (!wd) return EINA_FALSE;
   return wd->pulse;
}

EAPI void
elm_progressbar_pulse(Evas_Object *obj, Eina_Bool state)
{
   ELM_CHECK_WIDTYPE(obj, widtype);
   Widget_Data *wd = elm_widget_data_get(obj);
   if (!wd) return;
   state = !!state;
   if ((!wd->pulse) && (wd->pulse_state == state)) return;
   wd->pulse_state = state;
   if (wd->pulse_state)
     edje_object_signal_emit(wd->progressbar, "elm,state,pulse,start", "elm");
   else
     edje_object_signal_emit(wd->progressbar, "elm,state,pulse,stop", "elm");
}

EAPI void
elm_progressbar_value_set(Evas_Object *obj, double val)
{
   ELM_CHECK_WIDTYPE(obj, widtype);
   Widget_Data *wd = elm_widget_data_get(obj);
   if (!wd) return;
   if (wd->val == val) return;
   wd->val = val;
   if (wd->val < MIN_RATIO_LVL) wd->val = MIN_RATIO_LVL;
   if (wd->val > MAX_RATIO_LVL) wd->val = MAX_RATIO_LVL;
   _val_set(obj);
   _units_set(obj);
}

EAPI double
elm_progressbar_value_get(const Evas_Object *obj)
{
   ELM_CHECK_WIDTYPE(obj, widtype) 0.0;
   Widget_Data *wd = elm_widget_data_get(obj);
   if (!wd) return 0.0;
   return wd->val;
}

EAPI void
elm_progressbar_span_size_set(Evas_Object *obj, Evas_Coord size)
{
   ELM_CHECK_WIDTYPE(obj, widtype);
   Widget_Data *wd = elm_widget_data_get(obj);
   if (!wd) return;
   if (wd->size == size) return;
   wd->size = size;
   if (wd->horizontal)
     evas_object_size_hint_min_set(wd->spacer, (double)wd->size * elm_widget_scale_get(obj) * _elm_config->scale, 1);
   else
     evas_object_size_hint_min_set(wd->spacer, 1, (double)wd->size * elm_widget_scale_get(obj) * _elm_config->scale);
   edje_object_part_swallow(wd->progressbar, "elm.swallow.bar", wd->spacer);
   _sizing_eval(obj);
}

EAPI Evas_Coord
elm_progressbar_span_size_get(const Evas_Object *obj)
{
   ELM_CHECK_WIDTYPE(obj, widtype) 0;
   Widget_Data *wd = elm_widget_data_get(obj);
   if (!wd) return 0;
   return wd->size;
}

EAPI void
elm_progressbar_unit_format_set(Evas_Object *obj, const char *units)
{
   ELM_CHECK_WIDTYPE(obj, widtype);
   Widget_Data *wd = elm_widget_data_get(obj);
   if (!wd) return;
   eina_stringshare_replace(&wd->units, units);
   if (units)
     {
        edje_object_signal_emit(wd->progressbar, "elm,state,units,visible", "elm");
        edje_object_message_signal_process(wd->progressbar);
     }
   else
     {
        edje_object_signal_emit(wd->progressbar, "elm,state,units,hidden", "elm");
        edje_object_message_signal_process(wd->progressbar);
     }
   _units_set(obj);
   _sizing_eval(obj);
}

EAPI const char *
elm_progressbar_unit_format_get(const Evas_Object *obj)
{
   ELM_CHECK_WIDTYPE(obj, widtype) NULL;
   Widget_Data *wd = elm_widget_data_get(obj);
   if (!wd) return NULL;
   return wd->units;
}

EAPI void
elm_progressbar_horizontal_set(Evas_Object *obj, Eina_Bool horizontal)
{
   ELM_CHECK_WIDTYPE(obj, widtype);
   Widget_Data *wd = elm_widget_data_get(obj);
   if (!wd) return;
   horizontal = !!horizontal;
   if (wd->horizontal == horizontal) return;
   wd->horizontal = horizontal;
   _theme_hook(obj);
}

EAPI Eina_Bool
elm_progressbar_horizontal_get(const Evas_Object *obj)
{
   ELM_CHECK_WIDTYPE(obj, widtype) EINA_FALSE;
   Widget_Data *wd = elm_widget_data_get(obj);
   if (!wd) return EINA_FALSE;
   return wd->horizontal;
}

EAPI void
elm_progressbar_inverted_set(Evas_Object *obj, Eina_Bool inverted)
{
   ELM_CHECK_WIDTYPE(obj, widtype);
   Widget_Data *wd = elm_widget_data_get(obj);
   if (!wd) return;
   inverted = !!inverted;
   if (wd->inverted == inverted) return;
   wd->inverted = inverted;
   if (wd->inverted)
     edje_object_signal_emit(wd->progressbar, "elm,state,inverted,on", "elm");
   else
     edje_object_signal_emit(wd->progressbar, "elm,state,inverted,off", "elm");
   edje_object_message_signal_process(wd->progressbar);
   _val_set(obj);
   _units_set(obj);
}

EAPI Eina_Bool
elm_progressbar_inverted_get(const Evas_Object *obj)
{
   ELM_CHECK_WIDTYPE(obj, widtype) EINA_FALSE;
   Widget_Data *wd = elm_widget_data_get(obj);
   if (!wd) return EINA_FALSE;
   return wd->inverted;
}