{ lib
, stdenv
, fetchFromGitHub
, nix-update-script
, runtimeShell
, runCommand
, makeWrapper
, installShellFiles
, buildGoModule
, coreutils
, which
, gnugrep
, gnused
, openresolv
, systemd
, iproute2
, openvpn
, electron
}: let
  version = "1.3.4066.51";
  src = fetchFromGitHub {
    owner = "pritunl";
    repo = "pritunl-client-electron";
    rev = version;
    sha256 = "sha256-yoPpDOcTv3kBTHscYn//KseZpfj1HArInODSxPKOFXY=";
  };

  cli = buildGoModule {
    pname = "pritunl-cli";
    inherit version src;

    modRoot = "cli";
    vendorHash = "sha256-wwPgyIo14zpA+oCJH0CQ4+7zyP+Itxbd6S0P7t01wBw=";

    postInstall = ''
      mv $out/bin/cli $out/bin/pritunl-client
    '';
    passthru.updateScript = nix-update-script { };
  };

  service = buildGoModule {
    pname = "pritunl-client-service";
    inherit version src;

    modRoot = "service";
    vendorHash = "sha256-uy8+R4l3e4YAWMxWWbVHhkwxvbOsY5PF7fs1dVyMIAg=";

    nativeBuildInputs = [ makeWrapper ];

    postPatch = ''
      sed -Ei service/connection/scripts.go \
        -e 's|#!\s*(/usr)?/bin/(env )?bash\b|#! ${runtimeShell}|g'
    '' + lib.optionalString stdenv.hostPlatform.isLinux ''
      sed -Ei service/connection/scripts.go \
        -e 's|(/usr)?/s?bin/busctl\b|busctl|g' \
        -e 's|(/usr)?/s?bin/resolvectl\b|resolvectl|g' \
        -e 's|(/usr)?/s?bin/ip\b|ip|g'
    '';

    postInstall = ''
      mv $out/bin/service $out/bin/pritunl-client-service
    '' + lib.optionalString stdenv.hostPlatform.isLinux ''
      mkdir -p $out/lib/systemd/system/
      cp $src/resources_linux/pritunl-client.service $out/lib/systemd/system/
      substituteInPlace $out/lib/systemd/system/pritunl-client.service \
        --replace-warn "/usr" "$out"
    '';

    postFixup = let
      hookScriptsDeps = [
        coreutils
        which
        gnused
        gnugrep
      ] ++ lib.optionals stdenv.hostPlatform.isLinux [
        openresolv
        systemd
        iproute2
      ];
      openvpn-wrapped = runCommand "openvpn-wrapped" {
        nativeBuildInputs = [ makeWrapper ];
      } ''
        mkdir -p $out/bin
        makeWrapper ${openvpn}/bin/openvpn $out/bin/openvpn \
          --prefix PATH : ${lib.makeBinPath hookScriptsDeps} \
          --add-flags "--setenv PATH \$PATH"
      '';
    in lib.optionalString stdenv.hostPlatform.isLinux ''
      wrapProgram $out/bin/pritunl-client-service \
        --prefix PATH : "${lib.makeBinPath ([ openvpn-wrapped ])}"
    '';
    passthru.updateScript = nix-update-script { };
  };
in stdenv.mkDerivation {
  pname = "pritunl-client";
  inherit version src;

  dontBuild = true;
  dontConfigure = true;

  nativeBuildInputs = [
    makeWrapper
    installShellFiles
  ];

  installPhase = ''
    runHook preInstall

    mkdir -p $out/bin/
    ln -s ${cli}/bin/pritunl-client $out/bin/
    ln -s ${service}/bin/pritunl-client-service $out/bin/

    mkdir -p $out/lib/
    cp -r client $out/lib/pritunl_client_electron

    makeWrapper ${electron}/bin/electron $out/bin/pritunl-client-electron \
      --add-flags $out/lib/pritunl_client_electron

  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
    mkdir -p $out/lib/systemd/system/
    ln -s ${service}/lib/systemd/system/pritunl-client.service $out/lib/systemd/system/

    mkdir -p $out/share/icons/
    cp -r resources_linux/icons $out/share/icons/hicolor

    mkdir -p $out/share/applications/
    cp resources_linux/pritunl-client-electron.desktop $out/share/applications/
    substituteInPlace $out/share/applications/pritunl-client-electron.desktop \
      --replace-fail "/usr/lib/pritunl_client_electron/Pritunl" "$out/bin/pritunl-client-electron"
  '' + ''
    # install shell completions for pritunl-client
    installShellCompletion --cmd pritunl-client \
      --bash <($out/bin/pritunl-client completion bash) \
      --fish <($out/bin/pritunl-client completion fish) \
      --zsh <($out/bin/pritunl-client completion zsh)

    runHook postInstall
  '';

  passthru.updateScript = nix-update-script { };
  meta = with lib; {
    description = "Pritunl OpenVPN client";
    homepage = "https://client.pritunl.com/";
    license = licenses.unfree;
    maintainers = with maintainers; [ minizilla andrevmatos ];
  };
}