/* vi:set et ai sw=2 sts=2 ts=2: */
/* SPDX license identifier: MPL-2.0
 *
 * Copyright (C) 2012, GENIVI
 *
 * This file is part of node-startup-controller.
 *
 * This Source Code Form is subject to the terms of the
 * Mozilla Public License (MPL), v. 2.0.
 * If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * For further information see http://www.genivi.org/.
 *
 * List of changes:
 * 2015-04-30, Jonathan Maw, List of changes started
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif

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

#include <dlt/dlt.h>

#include <common/la-handler-dbus.h>
#include <common/nsm-enum-types.h>



static gchar          *unit = NULL;
static gint            timeout = 1000;
static NSMShutdownType shutdown_mode = NSM_SHUTDOWN_TYPE_NOT;



static GOptionEntry entries[] =
{
  { "unit",          'u', 0, G_OPTION_ARG_STRING, &unit,          "Legacy application unit",            NULL },
  { "timeout",       't', 0, G_OPTION_ARG_INT,    &timeout,       "Shutdown timeout in milliseconds",   NULL },
  { "shutdown-mode", 'm', 0, G_OPTION_ARG_INT,    &shutdown_mode, "Shutdown mode",                      NULL },
  { NULL },
};



DLT_DECLARE_CONTEXT (la_handler_context);



static void
unregister_dlt (void)
{
  DLT_UNREGISTER_CONTEXT (la_handler_context);
  DLT_UNREGISTER_APP ();
}



int
main (int    argc,
      char **argv)
{
  GOptionContext *context;
  LAHandler      *service;
  GError         *error = NULL;

  /* register the application and context with the DLT */
  DLT_REGISTER_APP ("NSC", "GENIVI Node Startup Controller");
  DLT_REGISTER_CONTEXT (la_handler_context, "LAH", "Legacy Application Handler");

  /* make sure to unregister the DLT at exit */
  atexit (unregister_dlt);

  /* initialize the GType type system */
  g_type_init ();

  /* prepare command line option parsing */
  context = g_option_context_new (NULL);
  g_option_context_set_help_enabled (context, TRUE);
  g_option_context_add_main_entries (context, entries, NULL);

  /* try to parse command line options */
  if (!g_option_context_parse (context, &argc, &argv, &error))
    {
      /* parsing failed, exit with an error */
      DLT_LOG (la_handler_context, DLT_LOG_ERROR,
               DLT_STRING ("Failed to parse command line options:"),
               DLT_STRING (error->message));

      /* clean up */
      g_option_context_free (context);
      g_error_free (error);
      g_free (unit);

      return EXIT_FAILURE;
    }
  g_option_context_free (context);

  /* abort if no unit file was specified */
  if (unit == NULL || *unit == '\0')
    {
      DLT_LOG (la_handler_context, DLT_LOG_ERROR,
               DLT_STRING ("Failed to register legacy application:"),
               DLT_STRING ("no unit specified"));

      /* free command line options */
      g_free (unit);

      return EXIT_FAILURE;
    }

  /* validate the shutdown mode */
  if (shutdown_mode != NSM_SHUTDOWN_TYPE_NORMAL
      && shutdown_mode != NSM_SHUTDOWN_TYPE_FAST
      && shutdown_mode != (NSM_SHUTDOWN_TYPE_NORMAL | NSM_SHUTDOWN_TYPE_FAST))
    {
      DLT_LOG (la_handler_context, DLT_LOG_ERROR,
               DLT_STRING ("Failed to register legacy application: "
                           "invalid shutdown mode"), DLT_INT (shutdown_mode));

      /* free command line options */
      g_free (unit);

      return EXIT_FAILURE;
    }

  /* validate the timeout */
  if (timeout < 0)
    {
      DLT_LOG (la_handler_context, DLT_LOG_ERROR,
               DLT_STRING ("Failed to register legacy application:"),
               DLT_STRING ("shutdown timeout must be non-negative"));

      /* free command line options */
      g_free (unit);

      return EXIT_FAILURE;
    }

  /* create a proxy to talk to the legacy app handler D-Bus service */
  service =
    la_handler_proxy_new_for_bus_sync (G_BUS_TYPE_SYSTEM,
                                       G_DBUS_PROXY_FLAGS_NONE,
                                       "org.genivi.NodeStartupController1",
                                       "/org/genivi/NodeStartupController1/LegacyAppHandler",
                                       NULL, &error);

  /* abort if the proxy could not be created */
  if (error != NULL)
    {
      DLT_LOG (la_handler_context, DLT_LOG_ERROR,
               DLT_STRING ("Failed to register legacy application:"),
               DLT_STRING (error->message));

      /* clean up */
      g_error_free (error);

      /* free command line options */
      g_free (unit);

      return EXIT_FAILURE;
    }

  /* forward the register request to the legacy app handler D-Bus service */
  if (!la_handler_call_register_sync (service, unit, shutdown_mode, timeout,
                                      NULL, &error))
    {
      DLT_LOG (la_handler_context, DLT_LOG_ERROR,
               DLT_STRING ("Failed to register legacy application:"),
               DLT_STRING (error->message));

      /* clean up */
      g_error_free (error);
      g_object_unref (service);

      /* free command line options */
      g_free (unit);

      return EXIT_FAILURE;
    }

  /* release the legacy app handler proxy */
  g_object_unref (service);

  /* free command line options */
  g_free (unit);

  return EXIT_SUCCESS;
}