cmake_minimum_required(VERSION 3.13)
# The CXX language is required in order to link statically.
project(CFullExampleV2 LANGUAGES C CXX)

include (GNUInstallDirs)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_BINDIR}")
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_LIBDIR}")

# Since this example uses MPI, find and link against it.
find_package(MPI COMPONENTS C)
if (NOT MPI_FOUND)
  message(STATUS
    "Skipping example: ${PROJECT_NAME} requires MPI.")
  return ()
endif ()

#------------------------------------------------------------------------------
add_executable(CFullExampleV2
  FEDataStructures.c
  FEDataStructures.h
  FEDriver.c)
target_link_libraries(CFullExampleV2
  PRIVATE
    MPI::MPI_C)


#------------------------------------------------------------------------------
option(USE_CATALYST "Build example with Catalyst enabled" ON)
if (USE_CATALYST)
  find_package(catalyst REQUIRED
    PATHS "${ParaView_DIR}/catalyst")
  target_compile_definitions(CFullExampleV2
    PRIVATE
      "PARAVIEW_IMPL_DIR=\"${ParaView_CATALYST_DIR}\""
      USE_CATALYST=1)
  target_link_libraries(CFullExampleV2
    PRIVATE
      catalyst::catalyst)

  include(CTest)
  if (BUILD_TESTING)
    add_test(
      NAME CFullExampleV2::SimplePipeline
      COMMAND CFullExampleV2
              ${CMAKE_CURRENT_SOURCE_DIR}/catalyst_pipeline.py)

    set(_vtk_fail_regex
      # CatalystAdaptor
      "Failed"
      # vtkLogger
      "(\n|^)ERROR: "
      "ERR\\|"
      # vtkDebugLeaks
      "instance(s)? still around")

    set_tests_properties("CFullExampleV2::SimplePipeline"
      PROPERTIES
        FAIL_REGULAR_EXPRESSION "${_vtk_fail_regex}"
        PASS_REGULAR_EXPRESSION "executing catalyst_pipeline"
        SKIP_REGULAR_EXPRESSION "Python support not enabled"
        SKIP_RETURN_CODE 125)

    # note that the CFullExampleV2::UsePYTHONPATH test is essentially the same as
    # CFullExampleV2::SimplePipeline except that this test does not specify the
    # full path to the Python script and instead relies on catalyst_pipeline.py
    # to be in PYTHONPATH.
    add_test(
      NAME CFullExampleV2::UsePYTHONPATH
      COMMAND ${CMAKE_COMMAND} -E env "PYTHONPATH=${CMAKE_CURRENT_SOURCE_DIR}:$ENV{PYTHONPATH}"
        ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/CFullExampleV2 catalyst_pipeline.py)

    set_tests_properties("CFullExampleV2::UsePYTHONPATH"
      PROPERTIES
        # XXX(cmake-3.25): use ENVIRONMENT_MODIFICATION instead of env "PYTHONPATH=...".
        #ENVIRONMENT_MODIFICATION "PYTHONPATH=path_list_prepend:${CMAKE_CURRENT_SOURCE_DIR}"
        FAIL_REGULAR_EXPRESSION "${_vtk_fail_regex}"
        PASS_REGULAR_EXPRESSION "executing catalyst_pipeline"
        SKIP_REGULAR_EXPRESSION "Python support not enabled"
        SKIP_RETURN_CODE 125)

    endif()
endif()