{ stdenv
, config
, pkgs
, lib
, fetchFromGitHub
, cmake
, eigen
, onnxruntime
, opencv
, cudaSupport ? config.cudaSupport
, cudaPackages ? { }
}@inputs:

let
  effectiveStdenv = if cudaSupport then cudaPackages.backendStdenv else inputs.stdenv;
  cudaCapabilities = cudaPackages.cudaFlags.cudaCapabilities;
  # E.g. [ "80" "86" "90" ]
  cudaArchitectures = (builtins.map cudaPackages.cudaFlags.dropDot cudaCapabilities);
  cudaArchitecturesString = lib.strings.concatStringsSep ";" cudaArchitectures;
in
effectiveStdenv.mkDerivation (finalAttrs: {
  pname = "fastdeploy-ppocr";
  version = "0-unstable-2023-10-09";

  src = fetchFromGitHub {
    owner = "Cryolitia";
    repo = "FastDeploy";
    # follows https://github.com/MaaAssistantArknights/MaaDeps/blob/master/vcpkg-overlay/ports/maa-fastdeploy/portfile.cmake#L4
    rev = "2e68908141f6950bc5d22ba84f514e893cc238ea";
    hash = "sha256-BWO4lKZhwNG6mbkC70hPgMNjabTnEV5XMo0bLV/gvQs=";
  };

  outputs = [ "out" "cmake" ];

  nativeBuildInputs = [
    cmake
    eigen
  ] ++ lib.optionals cudaSupport [
    cudaPackages.cuda_nvcc
  ];

  buildInputs = [
    onnxruntime
    opencv
  ] ++ lib.optionals cudaSupport (with cudaPackages; [
    cuda_cccl # cub/cub.cuh
    libcublas # cublas_v2.h
    libcurand # curand.h
    libcusparse # cusparse.h
    libcufft # cufft.h
    cudnn # cudnn.h
    cuda_cudart
  ]);

  cmakeFlags = [
    (lib.cmakeFeature "CMAKE_BUILD_TYPE" "None")
    (lib.cmakeBool "BUILD_SHARED_LIBS" true)
  ] ++ lib.optionals cudaSupport [
    (lib.cmakeFeature "CMAKE_CUDA_ARCHITECTURES" cudaArchitecturesString)
  ];

  postInstall = ''
    mkdir $cmake
    install -Dm644 ${finalAttrs.src}/cmake/Findonnxruntime.cmake $cmake/
  '';

  meta = with lib; {
    description = "MaaAssistantArknights stripped-down version of FastDeploy";
    homepage = "https://github.com/MaaAssistantArknights/FastDeploy";
    platforms = platforms.linux;
    license = licenses.asl20;
    broken = cudaSupport && stdenv.hostPlatform.system != "x86_64-linux";
  };
})