{ stdenv
, fetchurl
, ncurses
, lib
, dpkg
, rsync
, libffi
, libelf
, libxml2
, hwloc
, zlib
, autoPatchelfHook
, symlinkJoin
, libfabric
, gcc
, gcc7
, wrapCCWith
, linuxHeaders
}:

# The distribution of intel packages is a mess. We are doing the installation
# based on the .deb metapackage "intel-hpckit", and follow de dependencies,
# which have mismatching versions.

# Bruno Bzeznik (bzizou) went through the madness of using their .sh installer,
# pulling all the X dependencies here:
# https://github.com/Gricad/nur-packages/blob/4b67c8ad0ce1baa1d2f53ba41ae5bca8e00a9a63/pkgs/intel/oneapi.nix

# But this is an attempt to install the packages from the APT repo

let

  v = {
    hpckit   = "2023.1.0";
    compiler = "2023.1.0";
    tbb      = "2021.9.0";
    mpi      = "2021.9.0";
  };

  aptPackageIndex = stdenv.mkDerivation {
    name = "intel-oneapi-packages";
    srcs = [
      # Set the hashes to "" to fetch them
      (fetchurl {
        url = "https://apt.repos.intel.com/oneapi/dists/all/main/binary-amd64/Packages";
        sha256 = "sha256-ZaXaicvmuyRB84LYK1mDYWwpdNW+ZHQCV072SuH4EFA=";
      })
      (fetchurl {
        url = "https://apt.repos.intel.com/oneapi/dists/all/main/binary-all/Packages";
        sha256 = "sha256-6vuioA0Hl34/AUuBbRYGu3lt+rccqJdpipXQWZ4Nfp8=";
      })
    ];
    phases = [ "installPhase" ];
    installPhase = ''
      awk -F': ' '\
        BEGIN   { print "[ {" } \
        NR>1 && /^Package: / { print "} {"; } \
        /: /    { printf "%s = \"%s\";\n", $1, $2 } \
        END     { print "} ]" }' $srcs > $out
    '';
  };

  aptPackages = import aptPackageIndex;

  apthost = "https://apt.repos.intel.com/oneapi/";

  getSum = pkgList: name:
  let
    matches = lib.filter (x: name == x.Package) pkgList;
    #n = lib.length matches;
    #match = builtins.trace (name + " -- ${builtins.toString n}") (lib.elemAt matches 0);
    match = lib.elemAt matches 0;
  in
    match.SHA256;

  getUrl = pkgList: name:
  let
    matches = lib.filter (x: name == x.Package) pkgList;
    #match = assert lib.length matches == 1; lib.elemAt matches 0;
    n = lib.length matches;
    match = builtins.trace (name + " -- n=${builtins.toString n}") (lib.elemAt matches 0);
  in
    apthost + match.Filename;

  uncompressDebs = debs: name: stdenv.mkDerivation {
    name = name;
    srcs = debs;
    buildInputs = [ dpkg ];
    phases = [ "installPhase" ];
    installPhase = ''
      mkdir -p $out
      for src in $srcs; do
        echo "unpacking $src"
        dpkg -x $src $out
      done
    '';
  };

  joinDebs = name: names:
  let
    urls = builtins.map (x: getUrl aptPackages x) names;
    sums = builtins.map (x: getSum aptPackages x) names;
    getsrc = url: sha256: fetchurl { inherit url sha256; };
    debs = lib.zipListsWith getsrc urls sums;
  in
    uncompressDebs debs "${name}-source";


  intel-mpi = stdenv.mkDerivation rec {
    version = v.mpi;
    pname = "intel-mpi";

    src = joinDebs pname [
      "intel-oneapi-mpi-devel-${version}"
      "intel-oneapi-mpi-${version}"
    ];

    buildInputs = [
      rsync
      libfabric
      zlib
      stdenv.cc.cc.lib
    ];

    nativeBuildInputs = [ autoPatchelfHook ];
    phases = [ "installPhase" "fixupPhase" ];
    dontStrip = true;
    installPhase = ''
      mkdir -p $out/{bin,etc,lib,include}
      mkdir -p $out/share/man

      cd $src

      # MPI
      pushd opt/intel/oneapi/mpi/${version}
        rsync -a man/ $out/share/man/
        rsync -a etc/ $out/etc/
        rsync -a include/ $out/include/
        rsync -a lib/ $out/lib/
        # Broken due missing libze_loader.so.1
        rsync -a --exclude IMB-MPI1-GPU bin/ $out/bin/
      popd
    '';
    preFixup = ''
      for i in $out/bin/mpi* ; do
        echo "Fixing paths in $i"
        sed -i "s:I_MPI_SUBSTITUTE_INSTALLDIR:$out:g" "$i"
      done
    '';
  };

  intel-tbb = stdenv.mkDerivation rec {
    version = v.tbb;
    pname = "intel-tbb";
    src = joinDebs pname [
      "intel-oneapi-tbb-${version}"
      "intel-oneapi-tbb-common-${version}"
    ];

    buildInputs = [
      intel-mpi
      rsync
      libffi
      libelf
      libxml2
      hwloc
      stdenv.cc.cc.lib
    ];

    nativeBuildInputs = [ autoPatchelfHook ];
    phases = [ "installPhase" "fixupPhase" ];
    dontStrip = true;

    autoPatchelfIgnoreMissingDeps = [ "libhwloc.so.5" ];

    installPhase = ''
      mkdir -p $out/lib

      cd $src

      pushd opt/intel/oneapi/tbb/${version}
        # Libraries
        rsync -a lib/intel64/gcc4.8/ $out/lib/
      popd
    '';
  };

  intel-compiler-shared = stdenv.mkDerivation rec {
    version = v.compiler;
    pname = "intel-compiler-shared";
    src = joinDebs pname [
      "intel-oneapi-compiler-shared-${version}"
      "intel-oneapi-compiler-shared-common-${version}"
      "intel-oneapi-compiler-shared-runtime-${version}"
    ];

    buildInputs = [
      intel-mpi
      intel-tbb
      rsync
      libffi
      libelf
      libxml2
      hwloc
      stdenv.cc.cc.lib
    ];

    nativeBuildInputs = [ autoPatchelfHook ];
    phases = [ "installPhase" "fixupPhase" ];
    dontStrip = true;

    autoPatchelfIgnoreMissingDeps = [ "libsycl.so.6" ];

    installPhase = ''
      mkdir -p $out/{bin,lib,include}
      mkdir -p $out/share/man

      cd $src

      # Compiler
      pushd opt/intel/oneapi/compiler/${version}
        pushd linux
          # Binaries
          rsync -a bin/ $out/bin/
          rsync -a --exclude libcilkrts.so.5 bin/intel64/ $out/bin/

          # Libraries
          rsync -a lib/ $out/lib/
          rsync -a lib/x64/ $out/lib/
          rsync -a compiler/lib/intel64_lin/ $out/lib/
          chmod +w $out/lib
          cp bin/intel64/libcilkrts.so.5 $out/lib/
          ln -s $out/lib/libcilkrts.so.5 $out/lib/libcilkrts.so

          # Headers
          rsync -a compiler/include/ $out/include/
        popd
      popd
    '';
  };


  intel-compiler-fortran = stdenv.mkDerivation rec {
    version = v.compiler;
    pname = "intel-fortran";
    src = joinDebs pname [
      "intel-oneapi-compiler-fortran-${version}"
      "intel-oneapi-compiler-fortran-common-${version}"
      "intel-oneapi-compiler-fortran-runtime-${version}"

      "intel-oneapi-compiler-dpcpp-cpp-classic-fortran-shared-runtime-${version}"
      #"intel-oneapi-compiler-dpcpp-cpp-and-cpp-classic-${version}"
      #"intel-oneapi-compiler-dpcpp-cpp-and-cpp-classic-runtime-${version}"
    ];

    langFortran = true;

    buildInputs = [
      intel-mpi
      intel-compiler-shared
      rsync
      libffi
      libelf
      libxml2
      hwloc
      stdenv.cc.cc.lib
    ];

    nativeBuildInputs = [ autoPatchelfHook ];

    phases = [ "installPhase" "fixupPhase" ];

    dontStrip = true;

    installPhase = ''
      mkdir -p $out/{bin,lib,include}
      mkdir -p $out/share/man

      cd $src

      # Compiler
      pushd opt/intel/oneapi/compiler/${version}
        pushd linux
          # Binaries
          rsync -a bin/ $out/bin/
          rsync -a bin/intel64/ $out/bin/

          # Libraries
          rsync -a lib/ $out/lib/
          rsync -a compiler/lib/intel64_lin/ $out/lib/

          # Headers
          rsync -a compiler/include/ $out/include/
        popd

        # Manuals
        rsync -a documentation/en/man/common/ $out/share/man/

        # Fix lib_lin
        ln -s $out/lib $out/lib_lin
      popd
    '';
  };

  intel-compiler = stdenv.mkDerivation rec {
    version = v.compiler;
    pname = "intel-compiler";
    src = joinDebs pname [
      # C/C++
      "intel-oneapi-dpcpp-cpp-${version}"
      "intel-oneapi-compiler-dpcpp-cpp-${version}"
      "intel-oneapi-compiler-dpcpp-cpp-common-${version}"
      "intel-oneapi-compiler-dpcpp-cpp-runtime-${version}"
      "intel-oneapi-compiler-dpcpp-cpp-and-cpp-classic-${version}"
      "intel-oneapi-compiler-dpcpp-cpp-and-cpp-classic-common-${version}"
      "intel-oneapi-compiler-dpcpp-cpp-and-cpp-classic-runtime-${version}"
      "intel-oneapi-compiler-dpcpp-cpp-classic-fortran-shared-runtime-${version}"
    ];
    # From https://aur.archlinux.org/packages/intel-oneapi-compiler:
    # - intel-oneapi-compiler-cpp-eclipse-cfg-2023.0.0-25370_all.deb
    # + intel-oneapi-compiler-dpcpp-cpp-2023.0.0-2023.0.0-25370_amd64.deb
    # x intel-oneapi-compiler-dpcpp-cpp-and-cpp-classic-2023.0.0-2023.0.0-25370_amd64.deb (empty)
    # + intel-oneapi-compiler-dpcpp-cpp-and-cpp-classic-2023.0.0-25370_amd64.deb
    # + intel-oneapi-compiler-dpcpp-cpp-and-cpp-classic-common-2023.0.0-2023.0.0-25370_all.deb
    # + intel-oneapi-compiler-dpcpp-cpp-and-cpp-classic-runtime-2023.0.0-2023.0.0-25370_amd64.deb
    # + intel-oneapi-compiler-dpcpp-cpp-classic-fortran-shared-runtime-2023.0.0-2023.0.0-25370_amd64.deb
    # + intel-oneapi-compiler-dpcpp-cpp-common-2023.0.0-2023.0.0-25370_all.deb
    # + intel-oneapi-compiler-dpcpp-cpp-runtime-2023.0.0-2023.0.0-25370_amd64.deb
    # - intel-oneapi-compiler-dpcpp-eclipse-cfg-2023.0.0-25370_all.deb
    # - intel-oneapi-compiler-fortran-2023.0.0-2023.0.0-25370_amd64.deb
    # - intel-oneapi-compiler-fortran-common-2023.0.0-2023.0.0-25370_all.deb
    # - intel-oneapi-compiler-fortran-runtime-2023.0.0-2023.0.0-25370_amd64.deb
    # - intel-oneapi-compiler-fortran-runtime-2023.0.0-25370_amd64.deb
    # - intel-oneapi-compiler-shared-2023.0.0-2023.0.0-25370_amd64.deb
    # - intel-oneapi-compiler-shared-common-2023.0.0-2023.0.0-25370_all.deb
    # - intel-oneapi-compiler-shared-runtime-2023.0.0-2023.0.0-25370_amd64.deb
    # - intel-oneapi-dpcpp-cpp-2023.0.0-2023.0.0-25370_amd64.deb
    # - intel-oneapi-openmp-2023.0.0-2023.0.0-25370_amd64.deb
    # - intel-oneapi-openmp-common-2023.0.0-2023.0.0-25370_all.deb

    buildInputs = [
      intel-compiler-shared
      rsync
      libffi
      libelf
      libxml2
      hwloc
      stdenv.cc.cc.lib
    ];

    nativeBuildInputs = [ autoPatchelfHook ];
    autoPatchelfIgnoreMissingDeps = [ "libtbb.so.12" "libtbbmalloc.so.2" "libze_loader.so.1" ];

    phases = [ "installPhase" "fixupPhase" ];

    dontStrip = true;

    installPhase = ''
      mkdir -p $out/{bin,lib}
      mkdir -p $out/share/man

      cd $src

      # Compiler
      pushd opt/intel/oneapi/compiler/${version}
        pushd linux
          # Binaries
          rsync -a bin/ $out/bin/
          rsync -a bin-llvm/ $out/bin/
          rsync -a bin/intel64/ $out/bin/

          # Libraries
          rsync -a --exclude oclfpga lib/ $out/lib/
          rsync -a compiler/lib/intel64_lin/ $out/lib/

          # Headers
          rsync -a compiler/include/ $out/include/ # Intrinsics for icc
          rsync -a include/ $out/include/
          chmod +w $out/include
          ln -s $out/lib/clang/16.0.0/include/ $out/include/icx # For icx
        popd

        # Manuals
        rsync -a documentation/en/man/common/ $out/share/man/
      popd
    '';
  };

  wrapIntel = { cc, mygcc, extraBuild ? "", extraInstall ? "" }:
    let
      targetConfig = stdenv.targetPlatform.config;
    in (wrapCCWith {
      cc = cc;
      extraBuildCommands = ''
        echo "-isystem ${cc}/include" >> $out/nix-support/cc-cflags
        echo "-isystem ${cc}/include/intel64" >> $out/nix-support/cc-cflags

        echo "-L${mygcc.cc}/lib/gcc/${targetConfig}/${mygcc.version}" >> $out/nix-support/cc-ldflags
        echo "-L${mygcc.cc.lib}/lib" >> $out/nix-support/cc-ldflags
        echo "-L${intel-compiler-shared}/lib" >> $out/nix-support/cc-ldflags
        echo "-L${cc}/lib" >> $out/nix-support/cc-ldflags

        # Need the gcc in the path
        echo 'export "PATH=${mygcc}/bin:$PATH"' >> $out/nix-support/cc-wrapper-hook

        # Disable hardening by default
        echo "" > $out/nix-support/add-hardening.sh
      '' + extraBuild;
    }).overrideAttrs (old: {
      installPhase = old.installPhase + extraInstall;
    });

  icx-wrapper = wrapIntel rec {
    cc = intel-compiler;
    mygcc = gcc;
    extraBuild = ''
      wrap icx  $wrapper $ccPath/icx
      wrap icpx $wrapper $ccPath/icpx
      echo "-isystem ${cc}/include/icx" >> $out/nix-support/cc-cflags
      echo "--gcc-toolchain=${mygcc.cc}" >> $out/nix-support/cc-cflags
    '';
    extraInstall = ''
      export named_cc="icx"
      export named_cxx="icpx"
    '';
  };

  # Legacy
  icc-wrapper = wrapIntel rec {
    cc = intel-compiler;
    # Intel icc classic compiler tries to behave like the gcc found in $PATH.
    # EVEN if it doesn't support some of the features. See:
    # https://community.intel.com/t5/Intel-C-Compiler/builtin-shuffle-GCC-compatibility-and-has-builtin/td-p/1143619
    mygcc = gcc;
    extraBuild = ''
      wrap icc  $wrapper $ccPath/icc
      wrap icpc $wrapper $ccPath/icpc
      echo "-isystem ${cc}/include/icc" >> $out/nix-support/cc-cflags
    '';
    extraInstall = ''
      export named_cc="icc"
      export named_cxx="icpc"
    '';
  };

  ifort-wrapper = wrapIntel rec {
    cc = intel-compiler-fortran;
    mygcc = gcc;
    extraBuild = ''
      wrap ifort  $wrapper $ccPath/ifort
    '';
    extraInstall = ''
      export named_fc="ifort"
    '';
  };

  stdenv-icc = stdenv.override {
    cc = icc-wrapper;
    allowedRequisites = null;
  };

  stdenv-icx = stdenv.override {
    cc = icx-wrapper;
    allowedRequisites = null;
  };

  stdenv-ifort = stdenv.override {
    cc = ifort-wrapper;
    allowedRequisites = null;
  };

in
  {
    inherit aptPackages aptPackageIndex intel-mpi;
    icx = icx-wrapper;
    icc = icc-wrapper;
    ifort = ifort-wrapper;

    stdenv = stdenv-icx;
    stdenv-icc = stdenv-icc;
    stdenv-ifort = stdenv-ifort;
  }