/**
 * Copyright (C) 2021 Saturneric
 *
 * This file is part of GpgFrontend.
 *
 * GpgFrontend is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * GpgFrontend is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY 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 GpgFrontend. If not, see <https://www.gnu.org/licenses/>.
 *
 * The initial version of the source code is inherited from
 * the gpg4usb project, which is under GPL-3.0-or-later.
 *
 * All the source code of GpgFrontend was modified and released by
 * Saturneric<eric@bktus.com> starting on May 12, 2021.
 *
 * SPDX-License-Identifier: GPL-3.0-or-later
 *
 */

/**
 * \mainpage GpgFrontend Develop Document Main Page
 */

#include <csetjmp>
#include <csignal>
#include <cstddef>

#include "core/GpgCoreInit.h"
#include "ui/GpgFrontendApplication.h"
#include "ui/GpgFrontendUIInit.h"

/**
 * \brief initialize the easylogging++ library.
 */
INITIALIZE_EASYLOGGINGPP

/**
 * \brief Store the jump buff and make it possible to recover from a crash.
 */
jmp_buf recover_env;

constexpr int CRASH_CODE = ~0;  ///<

/**
 * @brief handle the signal SIGSEGV
 *
 * @param sig
 */
extern void handle_signal(int sig);

/**
 * @brief processes before exit the program.
 *
 */
extern void before_exit();

/**
 * @brief initialize the logging system.
 *
 */
extern void init_logging_system();

/**
 *
 * @param argc
 * @param argv
 * @return
 */
int main(int argc, char* argv[]) {
  // re
  signal(SIGSEGV, handle_signal);
  signal(SIGFPE, handle_signal);
  signal(SIGILL, handle_signal);

  // clean something before exit
  atexit(before_exit);

  // initialize qt resources
  Q_INIT_RESOURCE(gpgfrontend);

  // create qt application
  auto* app =
      GpgFrontend::UI::GpgFrontendApplication::GetInstance(argc, argv, true);

  // init the logging system
  init_logging_system();

  // init the logging system for core
  GpgFrontend::InitLoggingSystem();

  /**
   * internationalisation. loop to restart main window
   * with changed translation when settings change.
   */
  int return_from_event_loop_code;

  do {
#ifndef WINDOWS
    int r = sigsetjmp(recover_env, 1);
#else
    int r = setjmp(recover_env);
#endif
    if (!r) {
      // init ui library
      GpgFrontend::UI::InitGpgFrontendUI(app);

      // create main window
      return_from_event_loop_code = GpgFrontend::UI::RunGpgFrontendUI(app);
    } else {
      LOG(ERROR) << "recover from a crash";
      // when signal is caught, restart the main window
      auto* message_box = new QMessageBox(
          QMessageBox::Critical, _("A serious error has occurred"),
          _("Oh no! GpgFrontend caught a serious error in the software, so "
            "it needs to be restarted. If the problem recurs, please "
            "manually terminate the program and report the problem to the "
            "developer."),
          QMessageBox::Ok, nullptr);
      message_box->exec();
      return_from_event_loop_code = CRASH_CODE;
    }

    if (return_from_event_loop_code == CRASH_CODE) {
      app = GpgFrontend::UI::GpgFrontendApplication::GetInstance(argc, argv,
                                                                 true);
    }

    LOG(INFO) << "loop refresh";
  } while (return_from_event_loop_code == RESTART_CODE ||
           return_from_event_loop_code == CRASH_CODE);

  // exit the program
  return return_from_event_loop_code;
}