{ lib, stdenv, fetchFromGitHub
, dbus, cmake, pkgconfig
, glib, udev, polkit, libmodule
, pcre, libXdmcp, utillinux, libpthreadstubs
, enableDdc ? true, ddcutil
, enableDpms ? true, libXext
, enableGamma ? true, libXrandr
, enableScreen ? true }:

stdenv.mkDerivation rec {
  pname = "clightd";
  version = "4.0";

  src = fetchFromGitHub {
    owner = "FedeDP";
    repo = "Clightd";
    rev = version;
    sha256 = "0cskxy3xsy187in5vg8xcs3kwcx2s160qv009v0ahkcalp29ghz4";
  };

  # dbus-1.pc has datadir=/etc
  SYSTEM_BUS_DIR = "${placeholder "out"}/share/dbus-1/system-services";
  # systemd.pc has prefix=${systemd.out}
  MODULE_LOAD_DIR = "${placeholder "out"}/lib/modules-load.d";
  # polkit-gobject-1.pc has prefix=${polkit.out}
  POLKIT_ACTION_DIR = "${placeholder "out"}/share/polkit-1/actions";

  postPatch = ''
    sed -i "s@/etc@$out\0@" CMakeLists.txt
    sed -i "s@pkg_get_variable(SYSTEM_BUS_DIR.*@set(SYSTEM_BUS_DIR $SYSTEM_BUS_DIR)@" CMakeLists.txt
    sed -i "s@pkg_get_variable(MODULE_LOAD_DIR.*@set(MODULE_LOAD_DIR $MODULE_LOAD_DIR)@" CMakeLists.txt
    sed -i "s@pkg_get_variable(POLKIT_ACTION_DIR.*@set(POLKIT_ACTION_DIR $POLKIT_ACTION_DIR)@" CMakeLists.txt
  '';

  cmakeFlags = with lib;
     optional enableDdc "-DENABLE_DDC=1"
  ++ optional enableDpms "-DENABLE_DPMS=1"
  ++ optional enableGamma "-DENABLE_GAMMA=1"
  ++ optional enableScreen "-DENABLE_SCREEN=1";

  nativeBuildInputs = [
    dbus
    cmake
    pkgconfig
  ];

  buildInputs = with lib; [
    glib
    udev
    polkit
    libmodule

    pcre
    libXdmcp
    utillinux
    libpthreadstubs
  ] ++ optional enableDdc ddcutil
    ++ optional enableDpms libXext
    ++ optional enableGamma libXrandr;

  postInstall = ''
    mkdir -p $out/bin
    ln -svT $out/lib/clightd/clightd $out/bin/clightd
  '';

  meta = with lib; {
    description = "Linux bus interface that changes screen brightness/temperature";
    homepage = https://github.com/FedeDP/Clightd;
    platforms = platforms.linux;
    license = licenses.gpl3;
    maintainers = with maintainers; [
      eadwu
    ];
  };
}