{ lib
, stdenv
, fetchFromGitHub
, fetchpatch
, rocmUpdateScript
, runCommand
, pkg-config
, cmake
, rocm-cmake
, rocblas
, rocmlir
, clr
, clang-tools-extra
, clang-ocl
, composable_kernel
, frugally-deep
, rocm-docs-core
, half
, boost
, sqlite
, bzip2
, lbzip2
, nlohmann_json
, texliveSmall
, doxygen
, sphinx
, zlib
, gtest
, rocm-comgr
, roctracer
, python3Packages
, buildDocs ? false # Needs internet because of rocm-docs-core
, buildTests ? false
}:

let
  version = "6.0.2";

  src = fetchFromGitHub {
    owner = "ROCm";
    repo = "MIOpen";
    rev = "rocm-${version}";
    hash = "sha256-mbOdlSb0ESKi9hMkq3amv70Xkp/YKnZYre24d/y5TD0=";
    fetchLFS = true;
    leaveDotGit = true;

    # If you're reading this, it's gonna take a bit of time.
    # fetchSubModules doesn't work with postFetch???
    # fetchLFS isn't actually fetching the LFS files...
    postFetch = ''
      export HOME=$(mktemp -d)
      cd $out

      # We need more history to fetch LFS files
      git remote add origin $url
      git fetch origin
      git clean -fdx
      git checkout rocm-${version}

      # We need to do this manually since using leaveDotGit and fetchSubmodules errors
      git submodule update --init

      # Fetch the LFS files
      git lfs install
      git lfs fetch --all
      git lfs checkout

      # Remove the defunct .git folder
      rm -rf .git
    '';
  };

  latex = lib.optionalAttrs buildDocs (texliveSmall.withPackages (ps: with ps; [
    latexmk
    tex-gyre
    fncychap
    wrapfig
    capt-of
    framed
    needspace
    tabulary
    varwidth
    titlesec
  ]));

  gfx900 = runCommand "miopen-gfx900.kdb" { preferLocalBuild = true; } ''
    ${lbzip2}/bin/lbzip2 -ckd ${src}/src/kernels/gfx900.kdb.bz2 > $out
  '';

  gfx906 = runCommand "miopen-gfx906.kdb" { preferLocalBuild = true; } ''
    ${lbzip2}/bin/lbzip2 -ckd ${src}/src/kernels/gfx906.kdb.bz2 > $out
  '';

  gfx908 = runCommand "miopen-gfx908.kdb" { preferLocalBuild = true; } ''
    ${lbzip2}/bin/lbzip2 -ckd ${src}/src/kernels/gfx908.kdb.bz2 > $out
  '';

  gfx90a = runCommand "miopen-gfx90a.kdb" { preferLocalBuild = true; } ''
    ${lbzip2}/bin/lbzip2 -ckd ${src}/src/kernels/gfx90a.kdb.bz2 > $out
  '';

  gfx1030 = runCommand "miopen-gfx1030.kdb" { preferLocalBuild = true; } ''
    ${lbzip2}/bin/lbzip2 -ckd ${src}/src/kernels/gfx1030.kdb.bz2 > $out
  '';
in stdenv.mkDerivation (finalAttrs: {
  inherit version src;
  pname = "miopen";

  # Find zstd and add to target. Mainly for torch.
  patches = [
    (fetchpatch {
      url = "https://github.com/ROCm/MIOpen/commit/e608b4325646afeabb5e52846997b926d2019d19.patch";
      hash = "sha256-oxa3qlIC2bzbwGxrQOZXoY/S7CpLsMrnWRB7Og0tk0M=";
    })
    (fetchpatch {
      url = "https://github.com/ROCm/MIOpen/commit/3413d2daaeb44b7d6eadcc03033a5954a118491e.patch";
      hash = "sha256-ST4snUcTmmSI1Ogx815KEX9GdMnmubsavDzXCGJkiKs=";
    })
  ];

  outputs = [
    "out"
  ] ++ lib.optionals buildDocs [
    "doc"
  ] ++ lib.optionals buildTests [
    "test"
  ];

  nativeBuildInputs = [
    pkg-config
    cmake
    rocm-cmake
    clr
    clang-tools-extra
  ];

  buildInputs = [
    rocblas
    rocmlir
    clang-ocl
    composable_kernel
    half
    boost
    sqlite
    bzip2
    nlohmann_json
    frugally-deep
    roctracer
  ] ++ lib.optionals buildDocs [
    latex
    doxygen
    sphinx
    rocm-docs-core
    python3Packages.sphinx-rtd-theme
    python3Packages.breathe
    python3Packages.myst-parser
  ] ++ lib.optionals buildTests [
    zlib
  ];

  cmakeFlags = [
    "-DCMAKE_CXX_FLAGS=-Wno-#warnings" # <half> -> <half/half.hpp>
    "-DUNZIPPER=${bzip2}/bin/bunzip2"
    # Manually define CMAKE_INSTALL_<DIR>
    # See: https://github.com/NixOS/nixpkgs/pull/197838
    "-DCMAKE_INSTALL_BINDIR=bin"
    "-DCMAKE_INSTALL_LIBDIR=lib"
    "-DCMAKE_INSTALL_INCLUDEDIR=include"
    "-DCMAKE_C_COMPILER=hipcc"
    "-DCMAKE_CXX_COMPILER=hipcc"
    "-DMIOPEN_BACKEND=HIP"
  ] ++ lib.optionals buildTests [
    "-DBUILD_TESTS=ON"
    "-DMIOPEN_TEST_ALL=ON"
  ];

  postPatch = ''
    patchShebangs test src/composable_kernel fin utils install_deps.cmake

    substituteInPlace CMakeLists.txt \
      --replace "unpack_db(\"\''${CMAKE_SOURCE_DIR}/src/kernels/\''${FILE_NAME}.kdb.bz2\")" "" \
      --replace "MIOPEN_HIP_COMPILER MATCHES \".*clang\\\\+\\\\+$\"" "true" \
      --replace "set(MIOPEN_TIDY_ERRORS ALL)" "" # error: missing required key 'key'

    substituteInPlace test/gtest/CMakeLists.txt \
      --replace "include(googletest)" ""

    ln -sf ${gfx900} src/kernels/gfx900.kdb
    ln -sf ${gfx906} src/kernels/gfx906.kdb
    ln -sf ${gfx908} src/kernels/gfx908.kdb
    ln -sf ${gfx90a} src/kernels/gfx90a.kdb
    ln -sf ${gfx1030} src/kernels/gfx1030.kdb
  '';

  # Unfortunately, it seems like we have to call make on these manually
  postBuild = lib.optionalString buildDocs ''
    python -m sphinx -T -E -b html -d _build/doctrees -D language=en ../docs _build/html
  '' + lib.optionalString buildTests ''
    make -j$NIX_BUILD_CORES check
  '';

  postInstall = ''
    rm $out/bin/install_precompiled_kernels.sh
    ln -sf ${gfx900} $out/share/miopen/db/gfx900.kdb
    ln -sf ${gfx906} $out/share/miopen/db/gfx906.kdb
    ln -sf ${gfx908} $out/share/miopen/db/gfx908.kdb
    ln -sf ${gfx90a} $out/share/miopen/db/gfx90a.kdb
    ln -sf ${gfx1030} $out/share/miopen/db/gfx1030.kdb
  '' + lib.optionalString buildDocs ''
    mv ../doc/html $out/share/doc/miopen-hip
  '' + lib.optionalString buildTests ''
    mkdir -p $test/bin
    mv bin/test_* $test/bin
    patchelf --set-rpath $out/lib:${lib.makeLibraryPath (finalAttrs.buildInputs ++
      [ clr rocm-comgr ])} $test/bin/*
  '';

  requiredSystemFeatures = [ "big-parallel" ];

  passthru.updateScript = rocmUpdateScript {
    name = finalAttrs.pname;
    owner = finalAttrs.src.owner;
    repo = finalAttrs.src.repo;
  };

  meta = with lib; {
    description = "Machine intelligence library for ROCm";
    homepage = "https://github.com/ROCm/MIOpen";
    license = with licenses; [ mit ];
    maintainers = teams.rocm.members;
    platforms = platforms.linux;
    broken = versions.minor finalAttrs.version != versions.minor stdenv.cc.version || versionAtLeast finalAttrs.version "7.0.0";
  };
})