/*
An indicator to show information that is in messaging applications
that the user is using.

Copyright 2012 Canonical Ltd.

Authors:
    Ted Gould <ted@canonical.com>
    Lars Uebernickel <lars.uebernickel@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 <config.h>
#include <locale.h>
#include <libindicator/indicator-service.h>
#include <gio/gio.h>
#include <glib/gi18n.h>

#include "dbus-data.h"
#include "gsettingsstrv.h"
#include "gmenuutils.h"
#include "indicator-messages-service.h"
#include "indicator-messages-application.h"
#include "im-phone-menu.h"
#include "im-application-list.h"

#define NUM_STATUSES 5

static ImApplicationList *applications;

static IndicatorMessagesService *messages_service;
static GMenu *toplevel_menu;
static ImPhoneMenu *menu;
static GSettings *settings;

static void 
service_shutdown (IndicatorService * service, gpointer user_data)
{
	GMainLoop *mainloop = user_data;

	g_warning("Shutting down service!");
	g_main_loop_quit(mainloop);
}

static void
register_application (IndicatorMessagesService *service,
		      GDBusMethodInvocation *invocation,
		      const gchar *desktop_id,
		      const gchar *menu_path,
		      gpointer user_data)
{
	GDBusConnection *bus;
	const gchar *sender;

	im_application_list_add (applications, desktop_id);

	bus = g_dbus_interface_skeleton_get_connection (G_DBUS_INTERFACE_SKELETON (service));
	sender = g_dbus_method_invocation_get_sender (invocation);

	im_application_list_set_remote (applications, desktop_id, bus, sender, menu_path);
	g_settings_strv_append_unique (settings, "applications", desktop_id);

	indicator_messages_service_complete_register_application (service, invocation);
}

static void
unregister_application (IndicatorMessagesService *service,
			GDBusMethodInvocation *invocation,
			const gchar *desktop_id,
			gpointer user_data)
{
	im_application_list_remove (applications, desktop_id);
	g_settings_strv_remove (settings, "applications", desktop_id);

	indicator_messages_service_complete_unregister_application (service, invocation);
}

static void
got_bus (GObject *object,
	 GAsyncResult * res,
	 gpointer user_data)
{
	GDBusConnection *bus;
	GError *error = NULL;

	bus = g_bus_get_finish (res, &error);
	if (!bus) {
		g_warning ("unable to connect to the session bus: %s", error->message);
		g_error_free (error);
		return;
	}

	g_dbus_connection_export_action_group (bus, INDICATOR_MESSAGES_DBUS_OBJECT,
					       im_application_list_get_action_group (applications),
					       &error);
	if (error) {
		g_warning ("unable to export action group on dbus: %s", error->message);
		g_error_free (error);
		return;
	}

	g_dbus_connection_export_menu_model (bus, INDICATOR_MESSAGES_DBUS_OBJECT "/phone",
					     G_MENU_MODEL (toplevel_menu), &error);
	if (error) {
		g_warning ("unable to export menu on dbus: %s", error->message);
		g_error_free (error);
		return;
	}

	g_dbus_interface_skeleton_export (G_DBUS_INTERFACE_SKELETON (messages_service),
					  bus, INDICATOR_MESSAGES_DBUS_SERVICE_OBJECT,
					  &error);
	if (error) {
		g_warning ("unable to export messages service on dbus: %s", error->message);
		g_error_free (error);
		return;
	}

	g_object_unref (bus);
}

int
main (int argc, char ** argv)
{
	GMainLoop * mainloop = NULL;
	IndicatorService * service = NULL;
	GMenuItem *root;

	/* Glib init */
	g_type_init();

	mainloop = g_main_loop_new (NULL, FALSE);

	/* Create the Indicator Service interface */
	service = indicator_service_new_version(INDICATOR_MESSAGES_DBUS_NAME, 1);
	g_signal_connect(service, INDICATOR_SERVICE_SIGNAL_SHUTDOWN, G_CALLBACK(service_shutdown), mainloop);

	/* Setting up i18n and gettext.  Apparently, we need
	   all of these. */
	setlocale (LC_ALL, "");
	bindtextdomain (GETTEXT_PACKAGE, GNOMELOCALEDIR);
	textdomain (GETTEXT_PACKAGE);

	/* Bring up the service DBus interface */
	messages_service = indicator_messages_service_skeleton_new ();

	g_bus_get (G_BUS_TYPE_SESSION, NULL, got_bus, NULL);

	g_signal_connect (messages_service, "handle-register-application",
			  G_CALLBACK (register_application), NULL);
	g_signal_connect (messages_service, "handle-unregister-application",
			  G_CALLBACK (unregister_application), NULL);

	menu = im_phone_menu_new ();

	toplevel_menu = g_menu_new ();
	root = g_menu_item_new (NULL, "messages");
	g_menu_item_set_attribute (root, "x-canonical-type", "s", "com.canonical.indicator.root");
	g_menu_item_set_submenu (root, im_phone_menu_get_model (menu));
	g_menu_append_item (toplevel_menu, root);

	settings = g_settings_new ("com.canonical.indicator.messages");

	applications = im_application_list_new ();
	g_signal_connect_swapped (applications, "source-added",
				  G_CALLBACK (im_phone_menu_add_source), menu);
	g_signal_connect_swapped (applications, "source-removed",
				  G_CALLBACK (im_phone_menu_remove_source), menu);
	g_signal_connect_swapped (applications, "message-added",
				  G_CALLBACK (im_phone_menu_add_message), menu);
	g_signal_connect_swapped (applications, "message-removed",
				  G_CALLBACK (im_phone_menu_remove_message), menu);
	g_signal_connect_swapped (applications, "app-stopped",
				  G_CALLBACK (im_phone_menu_remove_application), menu);

	g_main_loop_run(mainloop);

	/* Clean up */
	g_object_unref (root);
	g_object_unref (messages_service);
	g_object_unref (settings);
	g_object_unref (applications);
	return 0;
}