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# This file is part of the GROMACS molecular simulation package.
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# Set up the module library
add_library(fft INTERFACE)

gmx_add_libgromacs_sources(
     calcgrid.cpp
     fft.cpp
     fft5d.cpp
     parallel_3dfft.cpp
     gpu_3dfft.cpp
     )

if (GMX_FFT_FFTPACK)
    gmx_add_libgromacs_sources(
        fft_fftpack.cpp
        ${CMAKE_SOURCE_DIR}/src/external/fftpack/fftpack.cpp)
endif()
if (GMX_FFT_FFTW3 OR GMX_FFT_ARMPL_FFTW3)
    gmx_add_libgromacs_sources(fft_fftw3.cpp)
endif()
if (GMX_FFT_MKL)
    gmx_add_libgromacs_sources(fft_mkl.cpp)
endif()
if(Heffte_FOUND)
    gmx_add_libgromacs_sources(
        gpu_3dfft_heffte.cpp
        )
endif()
if (GMX_GPU_CUDA)
    gmx_add_libgromacs_sources(
        # CUDA-specific sources
        gpu_3dfft_cufft.cu
        )
    _gmx_add_files_to_property(CUDA_SOURCES
        # Must add these files so they can include cuda_runtime.h
        gpu_3dfft.cpp
        )
elseif (GMX_GPU_OPENCL)
    gmx_add_libgromacs_sources(
        # OpenCL-specific sources
        gpu_3dfft_ocl.cpp
        )
elseif (GMX_GPU_SYCL)
    if (NOT GMX_SYCL_HIPSYCL AND GMX_FFT_MKL)
            gmx_add_libgromacs_sources(
            gpu_3dfft_sycl_mkl.cpp
            )
        _gmx_add_files_to_property(SYCL_SOURCES
            gpu_3dfft_sycl_mkl.cpp
            )
    endif()
    if (GMX_SYCL_HIPSYCL AND GMX_HIPSYCL_HAVE_HIP_TARGET)
            gmx_add_libgromacs_sources(
            gpu_3dfft_sycl_rocfft.cpp
            )
        _gmx_add_files_to_property(SYCL_SOURCES
            gpu_3dfft_sycl_rocfft.cpp
            )
    endif()
    gmx_add_libgromacs_sources(
        gpu_3dfft_sycl.cpp
        )
    _gmx_add_files_to_property(SYCL_SOURCES
        gpu_3dfft_sycl.cpp
        gpu_3dfft.cpp
        )
else()
    gmx_add_libgromacs_sources(
        # Stub sources for CPU-only build
        gpu_3dfft.cpp
        )
endif()

# Source files have the following private module dependencies.
target_link_libraries(fft PRIVATE
                      #                      gmxlib
                      #                      math
                      #                      mdtypes
                      #                      tng_io
                      )

# Public interface for modules, including dependencies and interfaces
#target_include_directories(fft PUBLIC
target_include_directories(fft INTERFACE
                           $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>)
#target_link_libraries(fft PUBLIC
target_link_libraries(fft INTERFACE
                      legacy_api
                      )

# TODO: when fft is an OBJECT target
#target_link_libraries(fft PUBLIC legacy_api)
#target_link_libraries(fft PRIVATE common)

# Module dependencies
# This module convey transitive dependence on these modules.
#target_link_libraries(fft PUBLIC
target_link_libraries(fft INTERFACE
                      #                      utility
                      )
# Source files have the following private module dependencies.
#target_link_libraries(fft PRIVATE tng_io)
# TODO: Explicitly link specific modules.
#target_link_libraries(fft PRIVATE legacy_modules)

if (BUILD_TESTING)
    add_subdirectory(tests)
endif()