{ lib
, buildPythonPackage
, fetchurl
, protobuf
, pymorphy3
, pymorphy3-dicts-uk
, sentencepiece
, spacy
, spacy-pkuseg
, spacy-transformers
, writeScript
, stdenv
, jq
, nix
, moreutils
}:
let
  buildModelPackage = { pname, version, sha256, license }:

    let
      lang = builtins.substring 0 2 pname;
      requires-protobuf = pname == "fr_dep_news_trf" || pname == "uk_core_news_trf";
    in
    buildPythonPackage {
      inherit pname version;

      src = fetchurl {
        url = "https://github.com/explosion/spacy-models/releases/download/${pname}-${version}/${pname}-${version}.tar.gz";
        inherit sha256;
      };

      propagatedBuildInputs = [ spacy ]
        ++ lib.optionals (lib.hasSuffix "_trf" pname) [ spacy-transformers ]
        ++ lib.optionals (lang == "ru") [ pymorphy3 ]
        ++ lib.optionals (lang == "uk") [ pymorphy3 pymorphy3-dicts-uk ]
        ++ lib.optionals (lang == "zh") [ spacy-pkuseg ]
        ++ lib.optionals (pname == "fr_dep_news_trf") [ sentencepiece ];

      postPatch = lib.optionalString requires-protobuf ''
        substituteInPlace meta.json \
          --replace "protobuf<3.21.0" "protobuf"
      '';

      nativeBuildInputs = lib.optionals requires-protobuf [
        protobuf
      ];

      pythonImportsCheck = [ pname ];

      passthru.updateScript = writeScript "update-spacy-models" ''
        #!${stdenv.shell}
        set -eou pipefail
        PATH=${lib.makeBinPath [ jq nix moreutils ]}

        IFS=. read -r major minor patch <<<"${spacy.version}"
        spacyVersion="$(echo "$major.$minor.0")"

        pushd pkgs/development/python-modules/spacy/ || exit

        jq -r '.[] | .pname' models.json | while IFS= read -r pname; do
          if [ "$(jq --arg pname "$pname" -r '.[] | select(.pname == $pname) | .version' models.json)" == "$spacyVersion" ]; then
            continue
          fi

          newHash="$(nix-prefetch-url "https://github.com/explosion/spacy-models/releases/download/$pname-$spacyVersion/$pname-$spacyVersion.tar.gz")"
          jq --arg newHash "$newHash" --arg pname "$pname" --arg spacyVersion "$spacyVersion" \
           '[(.[] | select(.pname != $pname)), (.[] | select(.pname == $pname) | .sha256 = $newHash | .version = $spacyVersion)] | sort_by(.pname)' \
           models.json | sponge models.json
        done

        popd || exit
      '';

      meta = with lib; {
        description = "Models for the spaCy NLP library";
        homepage = "https://github.com/explosion/spacy-models";
        license = licenses.${license};
        maintainers = with maintainers; [ rvl ];
      };
    };

  makeModelSet = models: with lib; listToAttrs (map (m: nameValuePair m.pname (buildModelPackage m)) models);

in
makeModelSet (lib.importJSON ./models.json)