/*
A small wrapper utility to load indicators and put them as menu items
into the gnome-panel using it's applet interface.

Copyright 2009 Canonical Ltd.

Authors:
    Ted Gould <ted@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 <sys/types.h>
#include <pwd.h>
#include <unistd.h>

#include <glib/gi18n.h>

#include <dbus/dbus-glib.h>
#include <dbus/dbus-glib-bindings.h>

#include <libdbusmenu-glib/server.h>
#include <libdbusmenu-glib/menuitem.h>

#include "dbus-shared-names.h"

#include "status-service-dbus.h"

#include "status-provider.h"
#include "status-provider-pidgin.h"

typedef StatusProvider * (*newfunc) (void);
#define STATUS_PROVIDER_CNT   1
static newfunc status_provider_newfuncs[STATUS_PROVIDER_CNT] = {
	status_provider_pidgin_new
};
static StatusProvider * status_providers[STATUS_PROVIDER_CNT] = { 0 };

static const gchar * status_strings [STATUS_PROVIDER_STATUS_LAST] = {
  /* STATUS_PROVIDER_STATUS_ONLINE,    */ N_("Available"),
  /* STATUS_PROVIDER_STATUS_AWAY,      */ N_("Away"),
  /* STATUS_PROVIDER_STATUS_DND        */ N_("Busy"),
  /* STATUS_PROVIDER_STATUS_INVISIBLE  */ N_("Invisible"),
  /* STATUS_PROVIDER_STATUS_OFFLINE,   */ N_("Offline")
};

static const gchar * status_icons[STATUS_PROVIDER_STATUS_LAST] = {
  /* STATUS_PROVIDER_STATUS_ONLINE, */     "user-online",
  /* STATUS_PROVIDER_STATUS_AWAY, */       "user-away",
  /* STATUS_PROVIDER_STATUS_DND, */        "user-busy",
  /* STATUS_PROVIDER_STATUS_INVISIBLE, */  "user-invisible",
  /* STATUS_PROVIDER_STATUS_OFFLINE */     "user-offline"
};


static DbusmenuMenuitem * root_menuitem = NULL;
static DbusmenuMenuitem * status_menuitem = NULL;
static GMainLoop * mainloop = NULL;
static StatusServiceDbus * dbus_interface = NULL;
static StatusProviderStatus global_status = STATUS_PROVIDER_STATUS_OFFLINE;

static void
status_update (void) {
	StatusProviderStatus oldglobal = global_status;
	global_status = STATUS_PROVIDER_STATUS_ONLINE;

	int i;
	for (i = 0; i < STATUS_PROVIDER_CNT; i++) {
		StatusProviderStatus localstatus = status_provider_get_status(status_providers[i]);
		if (localstatus > global_status) {
			global_status = localstatus;
		}
	}

	if (global_status != oldglobal) {
		g_debug("Global status changed to: %s", _(status_strings[global_status]));

		dbusmenu_menuitem_property_set(status_menuitem, "label", _(status_strings[global_status]));
		status_service_dbus_set_status(dbus_interface, status_icons[global_status]);
	}

	return;
}

/* A fun little function to actually lock the screen.  If,
   that's what you want, let's do it! */
static void
lock_screen (DbusmenuMenuitem * mi, gpointer data)
{
	g_debug("Lock Screen");

	DBusGConnection * session_bus = dbus_g_bus_get(DBUS_BUS_SESSION, NULL);
	g_return_if_fail(session_bus != NULL);

	DBusGProxy * proxy = dbus_g_proxy_new_for_name_owner(session_bus,
	                                                     "org.gnome.ScreenSaver",
	                                                     "/",
	                                                     "org.gnome.ScreenSaver",
	                                                     NULL);
	g_return_if_fail(proxy != NULL);

	dbus_g_proxy_call_no_reply(proxy,
	                           "Lock",
	                           G_TYPE_INVALID,
	                           G_TYPE_INVALID);

	g_object_unref(proxy);

	return;
}

static void
status_menu_click (DbusmenuMenuitem * mi, gpointer data)
{
	StatusProviderStatus status = (StatusProviderStatus)GPOINTER_TO_INT(data);
	g_debug("Setting status: %d", status);
	int i;
	for (i = 0; i < STATUS_PROVIDER_CNT; i++) {
		status_provider_set_status(status_providers[i], status);
	}

	return;
}

static gboolean
build_providers (gpointer data)
{
	int i;
	for (i = 0; i < STATUS_PROVIDER_CNT; i++) {
		status_providers[i] = status_provider_newfuncs[i]();

		if (status_providers[i] != NULL) {
			g_signal_connect(G_OBJECT(status_providers[i]), STATUS_PROVIDER_SIGNAL_STATUS_CHANGED, G_CALLBACK(status_update), NULL);
		}
	}

	status_update();

	return FALSE;
}

static void
build_user_item (DbusmenuMenuitem * root)
{
	struct passwd * pwd = NULL;

	pwd = getpwuid(getuid());

	if (pwd != NULL && pwd->pw_gecos != NULL) {
		gchar * name = g_strdup(pwd->pw_gecos);
		gchar * walker = name;
		while (*walker != '\0' && *walker != ',') { walker++; }
		*walker = '\0';

		DbusmenuMenuitem * useritem = dbusmenu_menuitem_new();
		dbusmenu_menuitem_property_set(useritem, "label", name);
		dbusmenu_menuitem_property_set(useritem, "sensitive", "false");
		dbusmenu_menuitem_child_append(root, useritem);

		g_free(name);
	} else {
		g_debug("PWD: %s", (pwd == NULL ? "(pwd null)" : (pwd->pw_gecos == NULL ? "(gecos null)" : pwd->pw_gecos)));
	}

	return;
}

static gboolean
build_menu (gpointer data)
{
	DbusmenuMenuitem * root = DBUSMENU_MENUITEM(data);
	g_return_val_if_fail(root != NULL, FALSE);

	build_user_item(root);

	status_menuitem = dbusmenu_menuitem_new();
	dbusmenu_menuitem_property_set(status_menuitem, "label", _(status_strings[global_status]));
	dbusmenu_menuitem_child_append(root, status_menuitem);

	StatusProviderStatus i;
	for (i = STATUS_PROVIDER_STATUS_ONLINE; i < STATUS_PROVIDER_STATUS_LAST; i++) {
		DbusmenuMenuitem * mi = dbusmenu_menuitem_new();

		dbusmenu_menuitem_property_set(mi, "label", _(status_strings[i]));
		dbusmenu_menuitem_property_set(mi, "icon", status_icons[i]);
		g_signal_connect(G_OBJECT(mi), DBUSMENU_MENUITEM_SIGNAL_ITEM_ACTIVATED, G_CALLBACK(status_menu_click), GINT_TO_POINTER(i));

		dbusmenu_menuitem_child_append(status_menuitem, mi);

		g_debug("Built %s", status_strings[i]);
	}

	DbusmenuMenuitem * mi = dbusmenu_menuitem_new();
	dbusmenu_menuitem_property_set(mi, "label", _("Lock Screen"));
	g_signal_connect(G_OBJECT(mi), DBUSMENU_MENUITEM_SIGNAL_ITEM_ACTIVATED, G_CALLBACK(lock_screen), GINT_TO_POINTER(i));
	dbusmenu_menuitem_child_append(root, mi);

	return FALSE;
}

int
main (int argc, char ** argv)
{
    g_type_init();

    DBusGConnection * connection = dbus_g_bus_get(DBUS_BUS_SESSION, NULL);
    DBusGProxy * bus_proxy = dbus_g_proxy_new_for_name(connection, DBUS_SERVICE_DBUS, DBUS_PATH_DBUS, DBUS_INTERFACE_DBUS);
    GError * error = NULL;
    guint nameret = 0;

    if (!org_freedesktop_DBus_request_name(bus_proxy, INDICATOR_STATUS_DBUS_NAME, 0, &nameret, &error)) {
        g_error("Unable to call to request name");
        return 1;
    }   

    if (nameret != DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER) {
        g_error("Unable to get name");
        return 1;
    }   

	g_idle_add(build_providers, NULL);

    root_menuitem = dbusmenu_menuitem_new();
    DbusmenuServer * server = dbusmenu_server_new(INDICATOR_STATUS_DBUS_OBJECT);
    dbusmenu_server_set_root(server, root_menuitem);

	g_idle_add(build_menu, root_menuitem);

	dbus_interface = g_object_new(STATUS_SERVICE_DBUS_TYPE, NULL);

    mainloop = g_main_loop_new(NULL, FALSE);
    g_main_loop_run(mainloop);

    return 0;
}