/*
Copyright 2012 Canonical Ltd.

Authors:
    Alberto Mardegan <alberto.mardegan@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/>.
*/

#include <gio/gio.h>
#include <glib/gi18n.h>

#include "webcredentials-mgr.h"

#include <libdbusmenu-glib/client.h>

struct _WebcredentialsMgr
{
  GObject parent_instance;
  GDBusProxy *proxy;
  DbusmenuMenuitem *menu_item;
};

#define WEBCREDENTIALS_OBJECT_PATH "/com/canonical/indicators/webcredentials"
#define WEBCREDENTIALS_BUS_NAME "com.canonical.indicators.webcredentials"
#define WEBCREDENTIALS_INTERFACE WEBCREDENTIALS_BUS_NAME

G_DEFINE_TYPE (WebcredentialsMgr, webcredentials_mgr, G_TYPE_OBJECT);

static void
update_disposition (WebcredentialsMgr *self, GVariant *error_status_prop)
{
  gboolean error_status;

  error_status = g_variant_get_boolean (error_status_prop);
  dbusmenu_menuitem_property_set (self->menu_item,
                                  DBUSMENU_MENUITEM_PROP_DISPOSITION,
                                  error_status ?
                                  DBUSMENU_MENUITEM_DISPOSITION_ALERT :
                                  DBUSMENU_MENUITEM_DISPOSITION_NORMAL);
}

static void
on_properties_changed (GDBusProxy *proxy,
                       GVariant *changed_properties,
                       GStrv invalidated_properties,
                       WebcredentialsMgr *self)
{
  if (g_variant_n_children (changed_properties) > 0) {
    GVariantIter *iter;
    const gchar *key;
    GVariant *value;

    g_variant_get (changed_properties, "a{sv}", &iter);
    while (g_variant_iter_loop (iter, "{&sv}", &key, &value)) {
      if (g_strcmp0 (key, "ErrorStatus") == 0) {
        update_disposition (self, value);
      }
    }
    g_variant_iter_free (iter);
  }
}

static void
on_menu_item_activated (DbusmenuMenuitem *menu_item,
                        guint timestamp,
                        WebcredentialsMgr *self)
{
  GError *error = NULL;

  if (!g_spawn_command_line_async("gnome-control-center credentials", &error))
  {
    g_warning("Unable to show control centre: %s", error->message);
    g_error_free(error);
  }
}

static void
webcredentials_mgr_init (WebcredentialsMgr *self)
{
  GError *error = NULL;
  GVariant *error_status_prop;

  self->menu_item = dbusmenu_menuitem_new ();
  dbusmenu_menuitem_property_set (self->menu_item,
                                  DBUSMENU_MENUITEM_PROP_TYPE,
                                  DBUSMENU_CLIENT_TYPES_DEFAULT);
  dbusmenu_menuitem_property_set (self->menu_item,
                                  DBUSMENU_MENUITEM_PROP_LABEL,
                                  _("Web Accounts…"));
  g_signal_connect (self->menu_item,
                    DBUSMENU_MENUITEM_SIGNAL_ITEM_ACTIVATED,
                    G_CALLBACK (on_menu_item_activated),
                    self);

  self->proxy =
    g_dbus_proxy_new_for_bus_sync (G_BUS_TYPE_SESSION,
                                   G_DBUS_PROXY_FLAGS_DO_NOT_AUTO_START,
                                   NULL,
                                   WEBCREDENTIALS_BUS_NAME,
                                   WEBCREDENTIALS_OBJECT_PATH,
                                   WEBCREDENTIALS_INTERFACE,
                                   NULL,
                                   &error);
  if (G_UNLIKELY (error != NULL)) {
      g_warning ("Couldn't create webcredentials proxy: %s", error->message);
      g_clear_error (&error);
      return;
  }

  g_signal_connect (self->proxy, "g-properties-changed",
                    G_CALLBACK (on_properties_changed), self);

  error_status_prop =
    g_dbus_proxy_get_cached_property (self->proxy, "ErrorStatus");
  if (error_status_prop != NULL) {
    update_disposition (self, error_status_prop);
    g_variant_unref (error_status_prop);
  }
}

static void
webcredentials_mgr_dispose (GObject *object)
{
  WebcredentialsMgr *self = WEBCREDENTIALS_MGR (object);

  if (self->proxy != NULL) {
    g_object_unref (self->proxy);
    self->proxy = NULL;
  }

  if (self->menu_item != NULL) {
    g_object_unref (self->menu_item);
    self->menu_item = NULL;
  }

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

static void
webcredentials_mgr_class_init (WebcredentialsMgrClass *klass)
{
  GObjectClass *object_class = G_OBJECT_CLASS (klass);
  object_class->dispose = webcredentials_mgr_dispose;
}

WebcredentialsMgr *webcredentials_mgr_new ()
{
  return g_object_new (WEBCREDENTIALS_TYPE_MGR, NULL);
}

DbusmenuMenuitem *webcredentials_mgr_get_menu_item (WebcredentialsMgr *self)
{
  g_return_val_if_fail (WEBCREDENTIALS_IS_MGR (self), NULL);
  return self->menu_item;
}