{ lib
, stdenv
, fetchFromGitHub
, autoconf-archive
, autoreconfHook
, makeWrapper
, pkg-config
, substituteAll
, curl
, gtk3
, libassuan
, libbsd
, libproxy
, libxml2
, nssTools
, openssl
, p11-kit
, pcsclite
, wrapGAppsHook
}:

stdenv.mkDerivation rec {
  pname = "eid-mw";
  # NOTE: Don't just blindly update to the latest version/tag. Releases are always for a specific OS.
  version = "5.1.16";

  src = fetchFromGitHub {
    owner = "Fedict";
    repo = "eid-mw";
    rev = "v${version}";
    hash = "sha256-UOZVCTXiqYnatS/ZhJZZprqtwtkVt8EJRHZ9XuX5W5o=";
  };

  postPatch = ''
    sed 's@m4_esyscmd_s(.*,@[${version}],@' -i configure.ac
    substituteInPlace configure.ac --replace 'p11kitcfdir=""' 'p11kitcfdir="'$out/share/p11-kit/modules'"'
  '';


  nativeBuildInputs = [ wrapGAppsHook autoreconfHook autoconf-archive pkg-config makeWrapper ];
  buildInputs = [ curl gtk3 libassuan libbsd libproxy libxml2 openssl p11-kit pcsclite ];

  preConfigure = ''
    mkdir openssl
    ln -s ${lib.getLib openssl}/lib openssl
    ln -s ${openssl.bin}/bin openssl
    ln -s ${openssl.dev}/include openssl
    export SSL_PREFIX=$(realpath openssl)
    substituteInPlace plugins_tools/eid-viewer/Makefile.in \
      --replace "c_rehash" "openssl rehash"
  '';
  # pinentry uses hardcoded `/usr/bin/pinentry`, so use the built-in (uglier) dialogs for pinentry.
  configureFlags = [ "--disable-pinentry" ];

  postInstall =
    let
      eid-nssdb-in = substituteAll {
        inherit (stdenv) shell;
        isExecutable = true;
        src = ./eid-nssdb.in;
      };
    in
    ''
      install -D ${eid-nssdb-in} $out/bin/eid-nssdb
      substituteInPlace $out/bin/eid-nssdb \
        --replace "modutil" "${nssTools}/bin/modutil"

      rm $out/bin/about-eid-mw
      wrapProgram $out/bin/eid-viewer --prefix XDG_DATA_DIRS : "$out/share/gsettings-schemas/$name"
    '';

  enableParallelBuilding = true;

  doCheck = true;

  meta = with lib; {
    description = "Belgian electronic identity card (eID) middleware";
    homepage = "https://eid.belgium.be/en";
    license = licenses.lgpl3Only;
    longDescription = ''
      Allows user authentication and digital signatures with Belgian ID cards.
      Also requires a running pcscd service and compatible card reader.

      eid-viewer is also installed.

      This package only installs the libraries. To use eIDs in Firefox or
      Chromium, the eID Belgium add-on must be installed.
      This package only installs the libraries. To use eIDs in NSS-compatible
      browsers like Chrom{e,ium} or Firefox, each user must first execute:
        ~$ eid-nssdb add
      (Running the script once as root with the --system option enables eID
      support for all users, but will *not* work when using Chrom{e,ium}!)
      Before uninstalling this package, it is a very good idea to run
        ~$ eid-nssdb [--system] remove
      and remove all ~/.pki and/or /etc/pki directories no longer needed.

      The above procedure doesn't seem to work in Firefox. You can override the
      firefox wrapper to add this derivation to the PKCS#11 modules, like so:

          firefox.override { pkcs11Modules = [ pkgs.eid-mw ]; }
    '';
    platforms = platforms.linux;
    maintainers = with maintainers; [ bfortz chvp ];
  };
}