/*
 * Copyright 2013 Canonical Ltd.
 *
 * Authors:
 *   Charles Kerr <charles.kerr@canonical.com>
 *
 * This program is free software: you can redistribute it and/or modify it 
 * under the terms of the GNU General Public License version 3, as published 
 * by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but 
 * WITHOUT ANY WARRANTY; without even the implied warranties of 
 * MERCHANTABILITY, SATISFACTORY QUALITY, or FITNESS FOR A PARTICULAR 
 * PURPOSE.  See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along 
 * with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifdef HAVE_CONFIG_H
 #include "config.h"
#endif

#include <gtk/gtk.h>

#include "idoactionhelper.h"
#include "idobasicmenuitem.h"

enum
{
  PROP_0,
  PROP_ICON,
  PROP_TEXT,
  PROP_SECONDARY_TEXT,
  PROP_LAST
};

static GParamSpec *properties[PROP_LAST];

struct _IdoBasicMenuItemPrivate
{
  GIcon * icon;
  char * text;
  char * secondary_text;

  GtkWidget * image;
  GtkWidget * label;
  GtkWidget * secondary_label;
};

typedef IdoBasicMenuItemPrivate priv_t;

G_DEFINE_TYPE (IdoBasicMenuItem, ido_basic_menu_item, GTK_TYPE_MENU_ITEM);

/***
****  GObject Virtual Functions
***/

static void
my_get_property (GObject     * o,
                 guint         property_id,
                 GValue      * value,
                 GParamSpec  * pspec)
{
  IdoBasicMenuItem * self = IDO_BASIC_MENU_ITEM (o);
  priv_t * p = self->priv;

  switch (property_id)
    {
      case PROP_ICON:
        g_value_set_object (value, p->icon);
        break;

      case PROP_TEXT:
        g_value_set_string (value, p->text);
        break;

      case PROP_SECONDARY_TEXT:
        g_value_set_string (value, p->secondary_text);
        break;

      default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (o, property_id, pspec);
        break;
    }
}

static void
my_set_property (GObject       * o,
                 guint           property_id,
                 const GValue  * value,
                 GParamSpec    * pspec)
{
  IdoBasicMenuItem * self = IDO_BASIC_MENU_ITEM (o);

  switch (property_id)
    {
      case PROP_ICON:
        ido_basic_menu_item_set_icon (self, g_value_get_object (value));
        break;

      case PROP_TEXT:
        ido_basic_menu_item_set_text (self, g_value_get_string (value));
        break;

      case PROP_SECONDARY_TEXT:
        ido_basic_menu_item_set_secondary_text (self, g_value_get_string (value));
        break;

      default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (o, property_id, pspec);
        break;
    }
}

static void
my_dispose (GObject * object)
{
  IdoBasicMenuItem * self = IDO_BASIC_MENU_ITEM (object);
  priv_t * p = self->priv;

  g_clear_object (&p->icon);

  G_OBJECT_CLASS (ido_basic_menu_item_parent_class)->dispose (object);
}

static void
my_finalize (GObject * object)
{
  IdoBasicMenuItem * self = IDO_BASIC_MENU_ITEM (object);
  priv_t * p = self->priv;

  g_free (p->text);
  g_free (p->secondary_text);

  G_OBJECT_CLASS (ido_basic_menu_item_parent_class)->finalize (object);
}

/***
****  Instantiation
***/

static void
ido_basic_menu_item_class_init (IdoBasicMenuItemClass *klass)
{
  GParamFlags prop_flags;
  GObjectClass * gobject_class = G_OBJECT_CLASS (klass);

  g_type_class_add_private (klass, sizeof (IdoBasicMenuItemPrivate));

  gobject_class->get_property = my_get_property;
  gobject_class->set_property = my_set_property;
  gobject_class->dispose = my_dispose;
  gobject_class->finalize = my_finalize;

  prop_flags = G_PARAM_CONSTRUCT
             | G_PARAM_READWRITE
             | G_PARAM_STATIC_STRINGS;

  properties[PROP_ICON] = g_param_spec_object ("icon",
                                               "Icon",
                                               "The menuitem's GIcon",
                                               G_TYPE_OBJECT,
                                               prop_flags);

  properties[PROP_TEXT] = g_param_spec_string ("text",
                                               "Text",
                                               "The menuitem's text",
                                               "",
                                               prop_flags);

  properties[PROP_SECONDARY_TEXT] = g_param_spec_string ("secondary-text",
                                                         "Secondary Text",
                                                         "The menuitem's secondary text",
                                                         "",
                                                         prop_flags);

  g_object_class_install_properties (gobject_class, PROP_LAST, properties);
}

static void
ido_basic_menu_item_init (IdoBasicMenuItem *self)
{
  priv_t * p;
  GtkWidget * w;
  GtkGrid * grid;

  self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
                                            IDO_TYPE_BASIC_MENU_ITEM,
                                            IdoBasicMenuItemPrivate);

  p = self->priv;

  p->image = gtk_image_new ();
  gtk_misc_set_alignment(GTK_MISC(p->image), 0.0, 0.0);
  p->label = gtk_label_new ("");
  gtk_misc_set_alignment (GTK_MISC(p->label), 0.0, 0.5);
  p->secondary_label = gtk_label_new ("");
  gtk_misc_set_alignment (GTK_MISC(p->secondary_label), 1.0, 0.5);

  w = gtk_grid_new ();
  grid = GTK_GRID (w);
  gtk_grid_attach (grid, p->image, 0, 0, 1, 1);
  gtk_grid_attach (grid, p->label, 1, 0, 1, 1);
  gtk_grid_attach (grid, p->secondary_label, 2, 0, 1, 1);
  g_object_set (p->label,
                "halign", GTK_ALIGN_START,
                "hexpand", TRUE,
                "margin-right", 6,
                "valign", GTK_ALIGN_CENTER,
                NULL);
  g_object_set (p->secondary_label,
                "halign", GTK_ALIGN_END,
                "hexpand", FALSE,
                "valign", GTK_ALIGN_CENTER,
                NULL);

  gtk_widget_show (w);
  gtk_container_add (GTK_CONTAINER (self), w);
}


/***
****  Public API
***/

/* create a new IdoBasicMenuItem */
GtkWidget *
ido_basic_menu_item_new (void)
{
  return GTK_WIDGET (g_object_new (IDO_TYPE_BASIC_MENU_ITEM, NULL));
}

void
ido_basic_menu_item_set_icon (IdoBasicMenuItem * self, GIcon * icon)
{
  IdoBasicMenuItemPrivate * p = self->priv;

  if (p->icon != icon)
    {
      g_clear_object (&p->icon);

      if (icon == NULL)
        {
          gtk_image_clear (GTK_IMAGE(p->image));
          gtk_widget_set_visible (p->image, FALSE);
        }
      else
        {
          p->icon = g_object_ref (icon);
          gtk_image_set_from_gicon (GTK_IMAGE(p->image), p->icon, GTK_ICON_SIZE_MENU);
          gtk_widget_set_visible (p->image, TRUE);
        }
    }
}

void
ido_basic_menu_item_set_icon_from_file (IdoBasicMenuItem * self, const char * filename)
{
  GFile * file = filename ? g_file_new_for_path (filename) : NULL;
  GIcon * icon = file ? g_file_icon_new (file) : NULL;

  ido_basic_menu_item_set_icon (self, icon);

  g_clear_object (&icon);
  g_clear_object (&file);
}

void
ido_basic_menu_item_set_text (IdoBasicMenuItem * self, const char * text)
{
  IdoBasicMenuItemPrivate * p = self->priv;

  if (g_strcmp0 (p->text, text))
    {
      g_free (p->text);
      p->text = g_strdup (text);

      g_object_set (G_OBJECT(p->label),
                    "label", p->text,
                    "visible", (gboolean)(p->text && *p->text),
                    NULL);
    }
}

void
ido_basic_menu_item_set_secondary_text (IdoBasicMenuItem * self, const char * secondary_text)
{
  IdoBasicMenuItemPrivate * p = self->priv;

  if (g_strcmp0 (p->secondary_text, secondary_text))
    {
      g_free (p->secondary_text);
      p->secondary_text = g_strdup (secondary_text);

      g_object_set (G_OBJECT(p->secondary_label),
                    "label", p->secondary_text,
                    "visible", (gboolean)(p->secondary_text && *p->secondary_text),
                    NULL);
    }
}

/***
****
****  Progress Menu Item
****
***/

static void
on_progress_action_state_changed (IdoActionHelper * helper,
                                  GVariant        * state,
                                  gpointer          unused G_GNUC_UNUSED)
{
  IdoBasicMenuItem * ido_menu_item;
  char * str;

  ido_menu_item = IDO_BASIC_MENU_ITEM (ido_action_helper_get_widget (helper));

  g_return_if_fail (ido_menu_item != NULL);
  g_return_if_fail (g_variant_is_of_type (state, G_VARIANT_TYPE_UINT32));

  str = g_strdup_printf ("%"G_GUINT32_FORMAT"%%", g_variant_get_uint32 (state));
  ido_basic_menu_item_set_secondary_text (ido_menu_item, str);
  g_free (str);
}

/**
 * ido_progress_menu_item_new_from_model:
 * @menu_item: the corresponding menuitem
 * @actions: action group to tell when this GtkMenuItem is activated
 *
 * Creates a new progress menuitem with properties initialized from
 * the menuitem's attributes.
 *
 * If the menuitem's 'action' attribute is set, trigger that action
 * in @actions when this IdoBasicMenuItem is activated.
 */
GtkMenuItem *
ido_progress_menu_item_new_from_model (GMenuItem    * menu_item,
                                       GActionGroup * actions)
{
  guint i;
  guint n;
  gchar * str;
  IdoBasicMenuItem * ido_menu_item;
  GParameter parameters[4];

  /* create the ido menuitem */;

  n = 0;

  if (g_menu_item_get_attribute (menu_item, "label", "s", &str))
    {
      GParameter p = { "text", G_VALUE_INIT };
      g_value_init (&p.value, G_TYPE_STRING);
      g_value_take_string (&p.value, str);
      parameters[n++] = p;
    }

  g_assert (n <= G_N_ELEMENTS (parameters));
  ido_menu_item = g_object_newv (IDO_TYPE_BASIC_MENU_ITEM, n, parameters);

  for (i=0; i<n; i++)
    g_value_unset (&parameters[i].value);

  /* give it an ActionHelper */

  if (g_menu_item_get_attribute (menu_item, "action", "s", &str))
    {
      IdoActionHelper * helper;

      helper = ido_action_helper_new (GTK_WIDGET(ido_menu_item),
                                      actions,
                                      str,
                                      NULL);
      g_signal_connect (helper, "action-state-changed",
                        G_CALLBACK (on_progress_action_state_changed), NULL);
      g_signal_connect_swapped (ido_menu_item, "destroy",
                                G_CALLBACK (g_object_unref), helper);

      g_free (str);
    }

  return GTK_MENU_ITEM (ido_menu_item);
}