/*
 * This program 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 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2019 Blender Foundation.
 * All rights reserved.
 */
#include "testing/testing.h"

#include <pxr/base/plug/registry.h>
#include <pxr/usd/usd/stage.h>

#include <string>

#include "BLI_path_util.h"
#include "BLI_utildefines.h"

#include "BKE_appdir.h"

namespace blender::io::usd {

class USDStageCreationTest : public testing::Test {
};

TEST_F(USDStageCreationTest, JSONFileLoadingTest)
{
  const std::string &release_dir = blender::tests::flags_test_release_dir();
  if (release_dir.empty()) {
    FAIL();
  }

  char usd_datafiles_dir[FILE_MAX];
  const size_t path_len = BLI_path_join(
      usd_datafiles_dir, FILE_MAX, release_dir.c_str(), "datafiles", "usd", nullptr);

  /* #BLI_path_join removes trailing slashes, but the USD library requires one in order to
   * recognize the path as directory. */
  BLI_assert(path_len + 1 < FILE_MAX);
  usd_datafiles_dir[path_len] = '/';
  usd_datafiles_dir[path_len + 1] = '\0';

  pxr::PlugRegistry::GetInstance().RegisterPlugins(usd_datafiles_dir);

  /* Simply the ability to create a USD Stage for a specific filename means that the extension
   * has been recognized by the USD library, and that a USD plugin has been loaded to write such
   * files. Practically, this is a test to see whether the USD JSON files can be found and
   * loaded. */
  std::string filename = "usd-stage-creation-test.usdc";
  pxr::UsdStageRefPtr usd_stage = pxr::UsdStage::CreateNew(filename);
  if (usd_stage != nullptr) {
    /* Even though we don't call `usd_stage->SaveFile()`, a file is still created on the
     * file-system when we call CreateNew(). It's immediately closed, though,
     * so we can safely call `unlink()` here. */
    unlink(filename.c_str());
  }
  else {
    FAIL() << "unable to find suitable USD plugin to write " << filename << "; looked in "
           << usd_datafiles_dir;
  }
}

}  // namespace blender::io::usd