include(VCICommon)

set(UNITTEST_SRC
  unittests.cc
  unittests_add_face.cc
  unittests_boundary.cc
  unittests_centroid_calculations.cc
  unittests_convert_meshes.cc
  unittests_cpp_11_features.cc
  unittests_decimater.cc
  unittests_delete_face.cc
  unittests_eigen3_type.cc
  unittests_faceless_mesh.cc
  unittests_mc_decimater.cc
  unittests_mesh_cast.cc
  unittests_mesh_dual.cc
  unittests_mesh_type.cc
  unittests_mixed_decimater.cc
  unittests_normal_calculations.cc
  unittests_polymesh_collapse.cc
  unittests_polymesh_vec2i.cc
  unittests_property.cc
  unittests_propertymanager.cc
  unittests_randomNumberGenerator.cc
  unittests_read_write_OBJ.cc
  unittests_read_write_OFF.cc
  unittests_read_write_OM.cc
  unittests_read_write_PLY.cc
  unittests_read_write_STL.cc
  unittests_set_positions_directly.cc
  unittests_smart_handles.cc
  unittests_smart_ranges.cc
  unittests_smarttagger.cc
  unittests_smoother.cc
  unittests_split_copy.cc
  unittests_split_edge_copy.cc
  unittests_sr_binary.cc
  unittests_stripifier.cc
  unittests_subdivider_adaptive.cc
  unittests_subdivider_uniform.cc
  unittests_traits.cc
  unittests_trimesh_circulator_current_halfedge_handle_replacement.cc
  unittests_trimesh_circulator_edge_face.cc
  unittests_trimesh_circulator_edge_halfedge.cc
  unittests_trimesh_circulator_edge_vertex.cc
  unittests_trimesh_circulator_face_edge.cc
  unittests_trimesh_circulator_face_face.cc
  unittests_trimesh_circulator_face_halfedge.cc
  unittests_trimesh_circulator_face_vertex.cc
  unittests_trimesh_circulator_halfedge_loop.cc
  unittests_trimesh_circulator_vertex_edge.cc
  unittests_trimesh_circulator_vertex_face.cc
  unittests_trimesh_circulator_vertex_ihalfedge.cc
  unittests_trimesh_circulator_vertex_ohalfedge.cc
  unittests_trimesh_circulator_vertex_vertex.cc
  unittests_trimesh_collapse.cc
  unittests_trimesh_garbage_collection.cc
  unittests_trimesh_iterators.cc
  unittests_trimesh_navigation.cc
  unittests_trimesh_others.cc
  unittests_trimesh_ranges.cc
  unittests_trimesh_split.cc
  unittests_trimesh_vec2i.cc
  unittests_tutorials.cc
  unittests_vdpm.cc
  unittests_vector_type.cc
)

if (NOT DEFINED OPENMESH_BUILD_UNIT_TESTS)
  set(OPENMESH_BUILD_UNIT_TESTS false CACHE BOOL "Enable or disable unit test builds in OpenMesh.")
endif()

if (OPENMESH_BUILD_UNIT_TESTS)
  # Fetch Gtest from github
  include(FetchContent)
  FetchContent_Declare(
    googletest
    GIT_REPOSITORY https://github.com/google/googletest.git
    GIT_TAG f8d7d77c06936315286eb55f8de22cd23c188571 # v1.14.0
    #FIND_PACKAGE_ARGS NAMES GTest
  )
  # For Windows: Prevent overriding the parent project's compiler/linker settings
  set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
  FetchContent_MakeAvailable(googletest)

  enable_testing()

  find_package(Eigen3)

  # Set correct include paths so that the compiler can find the headers
  include_directories(${GTEST_INCLUDE_DIRS})

  # Set additional link directories
  link_directories(${GTEST_LIBRARY_DIR})

  if (TARGET Eigen3::Eigen)
    add_definitions(-DENABLE_EIGEN3_TEST)
    link_libraries(Eigen3::Eigen)
  else()
    message(WARNING "Eigen3 not found! This will skip the Eigen3 Unittests. You can point cmake to Eigen3 by setting Eigen3_DIR to the cmake files of Eigen3")
  endif()

  # Create new target named unittests_hexmeshing
  # Create unittest executable
  vci_add_executable(unittests ${UNITTEST_SRC})
  vci_add_executable(unittests_customvec ${UNITTEST_SRC})
  vci_add_executable(unittests_doublevec ${UNITTEST_SRC})
  target_compile_definitions(unittests_customvec PRIVATE TEST_CUSTOM_TRAITS)
  target_compile_definitions(unittests_doublevec PRIVATE TEST_DOUBLE_TRAITS)

  # For the unittest we don't want the install rpath as set by vci_add_executable
  set_target_properties(unittests PROPERTIES BUILD_WITH_INSTALL_RPATH 0)
  set_target_properties(unittests_customvec PROPERTIES BUILD_WITH_INSTALL_RPATH 0)
  set_target_properties(unittests_doublevec PROPERTIES BUILD_WITH_INSTALL_RPATH 0)

  # Set output directory to ${BINARY_DIR}/Unittests
  set(OUTPUT_DIR "${CMAKE_BINARY_DIR}/Unittests")
  set_target_properties(unittests PROPERTIES RUNTIME_OUTPUT_DIRECTORY ${OUTPUT_DIR})
  set_target_properties(unittests_customvec PROPERTIES RUNTIME_OUTPUT_DIRECTORY ${OUTPUT_DIR})
  set_target_properties(unittests_doublevec PROPERTIES RUNTIME_OUTPUT_DIRECTORY ${OUTPUT_DIR})
  foreach (CONFIG ${CMAKE_CONFIGURATION_TYPES})
    string(TOUPPER ${CONFIG} UPCONFIG)
    set_target_properties(unittests PROPERTIES RUNTIME_OUTPUT_DIRECTORY_${UPCONFIG} ${OUTPUT_DIR})
    set_target_properties(unittests_customvec PROPERTIES RUNTIME_OUTPUT_DIRECTORY_${UPCONFIG} ${OUTPUT_DIR})
    set_target_properties(unittests_doublevec PROPERTIES RUNTIME_OUTPUT_DIRECTORY_${UPCONFIG} ${OUTPUT_DIR})
  endforeach ()

  if (NOT WIN32)
    # Link against all necessary libraries
    target_link_libraries(unittests OpenMeshCore OpenMeshTools GTest::gtest GTest::gtest_main pthread)
    target_link_libraries(unittests_customvec OpenMeshCore OpenMeshTools GTest::gtest GTest::gtest_main pthread)
    target_link_libraries(unittests_doublevec OpenMeshCore OpenMeshTools GTest::gtest GTest::gtest_main pthread)
  else()
    # Link against all necessary libraries
    target_link_libraries(unittests OpenMeshCore OpenMeshTools GTest::gtest GTest::gtest_main)
    target_link_libraries(unittests_customvec OpenMeshCore OpenMeshTools GTest::gtest GTest::gtest_main)
    target_link_libraries(unittests_doublevec OpenMeshCore OpenMeshTools GTest::gtest GTest::gtest_main)

    if (OPENMESH_BUILD_SHARED)
      add_definitions(-DOPENMESHDLL)
    endif()
  endif()

  if (NOT WIN32)
    # Set compiler flags
    set_target_properties(unittests PROPERTIES COMPILE_FLAGS "-g -pedantic -Wno-long-long")
    set_target_properties(unittests_customvec PROPERTIES COMPILE_FLAGS "-g -pedantic -Wno-long-long")
    set_target_properties(unittests_doublevec PROPERTIES COMPILE_FLAGS "-g -pedantic -Wno-long-long")
  else()
    # Set compiler flags
    set_target_properties(unittests PROPERTIES COMPILE_FLAGS "")
    set_target_properties(unittests_customvec PROPERTIES COMPILE_FLAGS "")
    set_target_properties(unittests_doublevec PROPERTIES COMPILE_FLAGS "")
  endif()

  if (OPENMESH_BUILD_SHARED)
    # Copy dlls to unittests
    SET(OPENMESH_TARGETS "OpenMeshTools" "OpenMeshCore")

    foreach (TAR ${OPENMESH_TARGETS})
      add_custom_command(TARGET unittests POST_BUILD
        COMMAND "${CMAKE_COMMAND}" -E copy
        "$<TARGET_FILE:${TAR}>"
        "${CMAKE_BINARY_DIR}/Unittests/$<TARGET_FILE_NAME:${TAR}>"
        COMMENT "Copying OpenMesh targets to unittests directory")
      add_custom_command(TARGET unittests_customvec POST_BUILD
        COMMAND "${CMAKE_COMMAND}" -E copy
        "$<TARGET_FILE:${TAR}>"
        "${CMAKE_BINARY_DIR}/Unittests/$<TARGET_FILE_NAME:${TAR}>"
        COMMENT "Copying OpenMesh targets to unittests directory")
      add_custom_command(TARGET unittests_doublevec POST_BUILD
        COMMAND "${CMAKE_COMMAND}" -E copy
        "$<TARGET_FILE:${TAR}>"
        "${CMAKE_BINARY_DIR}/Unittests/$<TARGET_FILE_NAME:${TAR}>"
        COMMENT "Copying OpenMesh targets to unittests directory")
    endforeach (TAR)
  endif()

  vci_copy_after_build(unittests ${CMAKE_CURRENT_SOURCE_DIR}/TestFiles ${CMAKE_BINARY_DIR}/Unittests/)
  vci_copy_after_build(unittests_customvec ${CMAKE_CURRENT_SOURCE_DIR}/TestFiles ${CMAKE_BINARY_DIR}/Unittests/)
  vci_copy_after_build(unittests_doublevec ${CMAKE_CURRENT_SOURCE_DIR}/TestFiles ${CMAKE_BINARY_DIR}/Unittests/)

  add_test(NAME AllTestsIn_OpenMesh_tests WORKING_DIRECTORY "${CMAKE_BINARY_DIR}/Unittests" COMMAND "${CMAKE_BINARY_DIR}/Unittests/unittests")
  add_test(NAME AllTestsIn_OpenMesh_tests_with_minimal_vector WORKING_DIRECTORY "${CMAKE_BINARY_DIR}/Unittests" COMMAND "${CMAKE_BINARY_DIR}/Unittests/unittests_customvec")
  add_test(NAME AllTestsIn_OpenMesh_tests_with_double_vector WORKING_DIRECTORY "${CMAKE_BINARY_DIR}/Unittests" COMMAND "${CMAKE_BINARY_DIR}/Unittests/unittests_doublevec")
endif()