static char help[] = "Create and view a forest mesh\n\n";

#include <petscdmforest.h>
#include <petscdmplex.h>
#include <petscoptions.h>

int main(int argc, char **argv)
{
  DM          dm;
  char        typeString[256] = {'\0'};
  PetscViewer viewer          = NULL;
  PetscBool   conv            = PETSC_FALSE;

  PetscFunctionBeginUser;
  PetscCall(PetscInitialize(&argc, &argv, NULL, help));
  PetscCall(DMCreate(PETSC_COMM_WORLD, &dm));
  PetscCall(PetscStrncpy(typeString, DMFOREST, 256));
  PetscOptionsBegin(PETSC_COMM_WORLD, NULL, "DM Forest example options", NULL);
  PetscCall(PetscOptionsString("-dm_type", "The type of the dm", NULL, DMFOREST, typeString, sizeof(typeString), NULL));
  PetscCall(PetscOptionsBool("-test_convert", "Test conversion to DMPLEX", NULL, conv, &conv, NULL));
  PetscOptionsEnd();
  PetscCall(DMSetType(dm, (DMType)typeString));
  PetscCall(DMSetFromOptions(dm));
  PetscCall(DMSetUp(dm));
  PetscCall(DMViewFromOptions(dm, NULL, "-dm_view"));
  PetscCall(PetscViewerDestroy(&viewer));
  if (conv) {
    DM dmConv;

    PetscCall(DMConvert(dm, DMPLEX, &dmConv));
    PetscCall(DMLocalizeCoordinates(dmConv));
    PetscCall(DMViewFromOptions(dmConv, NULL, "-dm_conv_view"));
    PetscCall(DMPlexCheckCellShape(dmConv, PETSC_FALSE, PETSC_DETERMINE));
    PetscCall(DMDestroy(&dmConv));
  }
  PetscCall(DMDestroy(&dm));
  PetscCall(PetscFinalize());
  return 0;
}

/*TEST

      test:
        output_file: output/empty.out
        suffix: p4est_topology_moebius
        nsize: 3
        args: -dm_type p4est -dm_forest_topology moebius -dm_view vtk:moebius.vtu
        requires: p4est !complex

      test:
        output_file: output/empty.out
        suffix: p4est_topology_moebius_convert
        nsize: 3
        args: -dm_type p4est -dm_forest_topology moebius -test_convert -dm_conv_view vtk:moebiusconv.vtu
        requires: p4est !complex

      test:
        output_file: output/empty.out
        suffix: p4est_topology_shell
        nsize: 3
        args: -dm_type p8est -dm_forest_topology shell -dm_view vtk:shell.vtu
        requires: p4est !complex

      test:
        TODO: broken
        output_file: output/empty.out
        suffix: p4est_topology_shell_convert
        nsize: 3
        args: -dm_type p8est -dm_forest_topology shell -test_convert -dm_conv_view vtk:shellconv.vtu
        requires: p4est !complex

      test:
        TODO: broken
        output_file: output/empty.out
        suffix: p4est_topology_sphere_convert
        nsize: 3
        args: -dm_type p8est -dm_forest_topology sphere -dm_view vtk:sphere.vtu -dm_forest_initial_refinement 1 -dm_forest_maximum_refinement 1 -test_convert -dm_conv_view vtk:sphereconv.vtu
        requires: p4est !complex

      test:
        output_file: output/empty.out
        suffix: p4est_topology_brick
        nsize: 3
        args: -dm_type p8est -dm_forest_topology brick -dm_p4est_brick_size 2,3,5 -dm_view vtk:brick.vtu
        requires: p4est !complex

      test:
        output_file: output/ex1_brick_periodic_glvis.out
        suffix: p4est_topology_brick_periodic_glvis
        args: -dm_type p8est -dm_forest_topology brick -dm_p4est_brick_size 3,4,5 -dm_p4est_brick_periodicity 0,1,0 -test_convert -dm_conv_view glvis:
        requires: p4est

      test:
        output_file: output/empty.out
        suffix: p4est_topology_brick_periodic_2d
        nsize: 3
        args: -dm_type p4est -dm_forest_topology brick -dm_p4est_brick_size 5,6 -dm_p4est_brick_periodicity 1,0 -test_convert -dm_forest_initial_refinement 0 -dm_forest_maximum_refinement 2 -dm_p4est_refine_pattern hash
        requires: p4est

      test:
        output_file: output/empty.out
        suffix: p4est_topology_brick_periodic_3d
        nsize: 3
        args: -dm_type p8est -dm_forest_topology brick -dm_p4est_brick_size 5,6,1 -dm_p4est_brick_periodicity 0,1,0 -test_convert -dm_forest_initial_refinement 0 -dm_forest_maximum_refinement 2 -dm_p4est_refine_pattern hash
        requires: p4est

TEST*/