{stdenv, system, fetchurl, dpkg, openssl, xorg
, glib, libGLU_combined, libpulseaudio, zlib, dbus, fontconfig, freetype
, gtk2, pango, atk, cairo, gdk_pixbuf, jasper, xkeyboardconfig
, makeWrapper , python, pythonPackages, lib
, libredirect, lsof}:

let
  all_data = builtins.fromJSON (builtins.readFile ./data.json);
  system_map = {
    i686-linux = "i386";
    x86_64-linux = "amd64";
  };

  data = all_data.${system_map.${system} or (throw "Unsupported platform")};

  baseUrl = http://repo.sinew.in;

  # used of both wrappers and libpath
  libPath = lib.makeLibraryPath (with xorg; [
    openssl
    libGLU_combined
    fontconfig
    freetype
    libpulseaudio
    zlib
    dbus
    libX11
    libXi
    libSM
    libICE
    libXext
    libXrender
    libXScrnSaver
    glib
    gtk2
    pango
    cairo
    atk
    gdk_pixbuf
    jasper
    stdenv.cc.cc
  ]);
  package = stdenv.mkDerivation rec {

    inherit (data) version;
    name = "enpass-${version}";

    src = fetchurl {
      inherit (data) sha256;
      url = "${baseUrl}/${data.path}";
    };

    meta = {
      description = "a well known password manager";
      homepage = https://www.enpass.io/;
      license = lib.licenses.unfree;
      platforms = [ "x86_64-linux" "i686-linux"];
    };

    buildInputs = [makeWrapper dpkg];
    phases = [ "unpackPhase" "installPhase" ];

    unpackPhase = "dpkg -X $src .";
    installPhase=''
      mkdir $out
      cp -r opt/Enpass/*  $out
      cp -r usr/* $out
      rm $out/bin/runenpass.sh
      cp $out/bin/EnpassHelper/EnpassHelper{,.untampered}
      cp $out/bin/EnpassHelper/EnpassNMHost{,.untampered}

      sed \
        -i s@/opt/Enpass/bin/runenpass.sh@$out/bin/Enpass@ \
        $out/share/applications/enpass.desktop

      for i in $out/bin/{Enpass,EnpassHelper/{EnpassHelper,EnpassNMHost}}; do
        patchelf --set-interpreter $(cat $NIX_CC/nix-support/dynamic-linker) $i
      done

      # The helper's sha256 sum must match, hence the use of libredirect.
      # Also, lsof must be in the path for proper operation.
      wrapProgram $out/bin/Enpass \
        --set LD_LIBRARY_PATH "${libPath}:$out/lib:$out/plugins/sqldrivers" \
        --set QT_PLUGIN_PATH "$out/plugins" \
        --set QT_QPA_PLATFORM_PLUGIN_PATH "$out/plugins/platforms" \
        --set QT_XKB_CONFIG_ROOT "${xkeyboardconfig}/share/X11/xkb" \
        --set HIDE_TOOLBAR_LINE 0 \
        --set LD_PRELOAD "${libredirect}/lib/libredirect.so" \
        --set NIX_REDIRECTS "$out/bin/EnpassHelper/EnpassHelper=$out/bin/EnpassHelper/EnpassHelper.untampered:$out/bin/EnpassHelper/EnpassNMHost=$out/bin/EnpassHelper/EnpassNMHost.untampered" \
        --prefix PATH : ${lsof}/bin

      makeWrapper $out/bin/EnpassHelper/{EnpassNMHost,runNativeMessaging.sh} \
        --set LD_LIBRARY_PATH "${libPath}:$out/lib:$out/plugins/sqldrivers" \
        --set QT_PLUGIN_PATH "$out/plugins" \
        --set QT_QPA_PLATFORM_PLUGIN_PATH "$out/plugins/platforms" \
        --set QT_XKB_CONFIG_ROOT "${xkeyboardconfig}/share/X11/xkb" \
        --set HIDE_TOOLBAR_LINE 0
    '';
  };
  updater = {
    update = stdenv.mkDerivation rec {
      name = "enpass-update-script";
      SCRIPT =./update_script.py;

      buildInputs = with pythonPackages; [python requests pathlib2 six attrs ];
      shellHook = ''
      exec python $SCRIPT --target pkgs/tools/security/enpass/data.json --repo ${baseUrl}
      '';

    };
  };
in (package // {refresh = updater;})