nixos/modules/dwm.nix

{ lib, config, pkgs, inputs, ... }:

let
  inherit (pkgs) fetchpatch;
  inherit (lib) getExe;

  cfg = config.snowhawk.dwm;
in
{
  options.snowhawk.dwm = {
    enable = lib.mkEnableOption "dwm";
  };

  config = lib.mkIf cfg.enable {
    # Enable the X11 windowing system.
    services.xserver.enable = true;

    # Configure keymap in X11
    services.xserver = {
      xkb = {
        layout = "us";
        variant = "";
      };
    };

    services.xserver.windowManager.dwm = {
      enable = true;
      package = pkgs.dwm.overrideAttrs (oldAttrs: {
        patches = [
          # Systray patch
          (fetchpatch {
            url = "https://dwm.suckless.org/patches/systray/dwm-systray-20230922-9f88553.diff";
            hash = "sha256-Kh1aP1xgZAREjTy7Xz48YBo3rhrJngspUYwBU2Gyw7k=";
          })

          ../home/dwm/config.def.h-6.5.diff
        ];
      });
    };

    services.picom = {
      enable = true;
      fade = false;
    };

    systemd.user.services.xrootdatetime = {
      script =
        let
          pamixer = getExe pkgs.pamixer;
          xsetroot = getExe pkgs.xorg.xsetroot;
        in
          /* bash */ ''
          function update_x_root() {
            set +e # allow errors
            mute="$(${pamixer} --default-source --get-mute)"
            set -e # disallow errors

            if [[ "$mute" == "true" ]]; then
              mutedString="Mic Muted "
            else
              mutedString=""
            fi

            dateTime=$(date +"<-- %A, %B %d -- %H:%M -->")
            ${xsetroot} -name "$mutedString$dateTime"
          }

          trap update_x_root SIGUSR1

          while true; do
            sleep 1 &
            wait
            update_x_root
          done
        '';
      wantedBy = [ "graphical-session.target" ];
      after = [ "pipewire.service" ];
      serviceConfig.Restart = "on-failure";
    };

    systemd.user.services.fehbg = {
      script = ''
        ${getExe pkgs.feh} --no-fehbg --bg-scale '${inputs.backgrounds}/bg-none-nord.webp'
      '';
      wantedBy = [ "graphical-session.target" ];
      partOf = [ "graphical-session.target" ];
    };

    environment.systemPackages = with pkgs; [
      dmenu
      xclip
    ];

    home-manager.sharedModules = [
      ./home/dwm.nix
      { snowhawk.dwm.enable = lib.mkDefault true; }
    ];
  };
}