############### cython based modules

add_custom_command(
    OUTPUT fl.c
    DEPENDS fl.pyx libgsd.pxd
    COMMAND ${CYTHON_EXECUTABLE}
    ARGS
        -${PYTHON_VERSION_MAJOR} -I ${CMAKE_CURRENT_SOURCE_DIR}
        ${CMAKE_CURRENT_SOURCE_DIR}/fl.pyx -o ${CMAKE_CURRENT_BINARY_DIR}/fl.c
    COMMENT "Cythonizing fl.pyx"
)

set_source_files_properties(
    gsd.c
    PROPERTIES COMPILE_DEFINITIONS NO_IMPORT_ARRAY
)

add_library(gsd_objects OBJECT gsd.c)
set_target_properties(gsd_objects PROPERTIES POSITION_INDEPENDENT_CODE TRUE)

if(CLANG_TIDY_EXE)
    set_target_properties(
        gsd_objects
        PROPERTIES C_CLANG_TIDY "${DO_CLANG_TIDY}"
    )
endif()

add_library(fl SHARED fl.c gsd.c)
target_compile_definitions(fl PRIVATE NPY_NO_DEPRECATED_API=NPY_1_7_API_VERSION)

if(!WIN32)
    target_compile_definitions(fl PRIVATE Py_LIMITED_API=0x030B0000)
endif()

set_target_properties(
    fl
    PROPERTIES PREFIX "" OUTPUT_NAME "fl" MACOSX_RPATH "On"
)
if(APPLE)
    set_target_properties(fl PROPERTIES SUFFIX ".so")
endif(APPLE)

if(WIN32)
    set_target_properties(fl PROPERTIES SUFFIX ".pyd")
endif()

if(WIN32)
    # Link to the Python libraries on windows
    target_link_libraries(fl ${PYTHON_LIBRARY})
else()
    # Do not link to the Python libraries on Mac/Linux - symbols are provided by
    # the `python` executable. "-undefined dynamic_lookup" is needed on Mac
    target_link_options(
        fl
        PRIVATE "$<$<PLATFORM_ID:Darwin>:LINKER:-undefined,dynamic_lookup>"
    )
endif()

################ Python only modules
# copy python modules to the build directory to make it a working python package
macro(copy_file file)
    add_custom_command(
        OUTPUT ${file}
        DEPENDS ${file}
        COMMAND ${CMAKE_COMMAND}
        ARGS
            -E copy ${CMAKE_CURRENT_SOURCE_DIR}/${file}
            ${CMAKE_CURRENT_BINARY_DIR}/${file}
        COMMENT "Copy gsd/${file}"
    )
endmacro(copy_file)

set(files
    __init__.py
    __main__.py
    hoomd.py
    pygsd.py
    version.py
    conftest.py
    pytest_plugin_validate.py
)

foreach(file ${files})
    copy_file(${file})
endforeach()

add_custom_target(copy_gsd ALL DEPENDS ${files})

add_subdirectory(test)
