{ pkgs ? import <nixpkgs> { config = { }; overlays = [ ]; }, ... }:
# Tried using pyproject.nix but mpd2 dependency wouldn't resolve,
# is called pyton-mpd2 on PyPi but mpd2 in nixpkgs.
let
  frobar = pkgs.python3Packages.buildPythonApplication {
    pname = "frobar";
    version = "2.0";

    runtimeInputs = with pkgs; [ lemonbar-xft wirelesstools ];
    propagatedBuildInputs = with pkgs.python3Packages; [
      coloredlogs
      notmuch
      i3ipc
      mpd2
      psutil
      pulsectl
      pyinotify
    ];
    makeWrapperArgs = [ "--prefix PATH : ${pkgs.lib.makeBinPath (with pkgs; [ lemonbar-xft wirelesstools ])}" ];

    src = ./.;
  };
in
{
  config = {
    xsession.windowManager.i3.config.bars = [ ];
    programs.autorandr.hooks.postswitch = {
      frobar = "${pkgs.systemd}/bin/systemctl --user restart frobar";
    };
    systemd.user.services.frobar = {
      Unit = {
        Description = "frobar";
        After = [ "graphical-session-pre.target" ];
        PartOf = [ "graphical-session.target" ];
      };

      Service = {
        # Wait for i3 to start. Can't use ExecStartPre because otherwise it blocks graphical-session.target, and there's nothing i3/systemd
        # TODO Do that better
        ExecStart = ''${pkgs.bash}/bin/bash -c "while ! ${pkgs.i3}/bin/i3-msg; do ${pkgs.coreutils}/bin/sleep 1; done; ${frobar}/bin/frobar"''; 
      };

      Install = { WantedBy = [ "graphical-session.target" ]; };
    };
  };
}
# TODO Connection with i3 is lost on start sometimes, more often than with Arch?
# TODO Restore ability to build frobar with nix-build