dotfiles/modules/programs/hyprland/default.nix

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

with lib;
let
  cfg = config.my.programs.hyprland;

  hyprland = pkgs.hyprland.override { nvidiaPatches = cfg.nvidiaSupport; };
in
{
  options.my.programs.hyprland = {
    enable = mkEnableOption "hyprland";
    nvidiaSupport = mkEnableOption "enable nvidia Support";
  };

  config = mkIf cfg.enable {

    # enable nix module
    programs.hyprland = {
      enable = true;
      package = null; # because we use the home-manager module
    };

    # enable home-manager module
    home-manager.users.moritz = {
      # import home-manager module
      imports = [ inputs.hyprland.homeManagerModules.default ];

      wayland.windowManager.hyprland = {
        enable = true;
        package = hyprland;
        extraConfig = import ./config.nix args;
      };
    };


    # add waybar as a status bar
    home-manager.users.moritz.programs.waybar = {
      enable = true;

      # use package with hyprland support for switching workspaces
      package = pkgs.waybar-hyprland;

      # start using systemd service
      systemd = {
        enable = true;
        target = "hyprland-session.target";
      };

      settings = {
        mainBar = {
          layer = "top";
          position = "top";
          height = 30;
          output = [
            "eDP-1"
            "HDMI-A-1"
            "HDMI-A-2"
          ];
          modules-left = [ "wlr/workspaces" ];
          modules-center = [ "hyprland/window" ];
          modules-right = [ "network" "memory" "cpu" "battery" "clock" ];
          modules = {
            "wlr/workspaces" = {
              on-click = "activate";
            };
          };
        };
      };
    };


    # lock screen after timeout
    home-manager.users.moritz.services.swayidle = {
      enable = true;
      events = [
        {
          event = "before-sleep";
          command = "${pkgs.swaylock-effects}/bin/swaylock -fF";
        }
        {
          event = "lock";
          command = "${pkgs.swaylock-effects}/bin/swaylock -fF";
        }
      ];
      timeouts = [
        {
          timeout = 300;
          command = "${hyprland}/bin/hyprctl dispatch dpms off";
          resumeCommand = "${hyprland}/bin/hyprctl dispatch dpms on";
        }
        {
          timeout = 310;
          command = "${pkgs.systemd}/bin/loginctl lock-session";
        }
      ];
    };
    # start swayidle as part of hyprland, not sway
    systemd.user.services.swayidle.Install.WantedBy = lib.mkForce [ "hyprland-session.target" ];

    # adds pam module for swaylock
    security.pam.services.swaylock = { };


    # start hyprpaper daemon using systemd unit (to set wallpaper)
    systemd.user.services.hyprpaper = {
      enable = true;
      path = [ pkgs.hyprpaper ];
      wantedBy = [ "hyprland-session.target" ];
      after = [ "hyprland-session.target" ];
      script = "hyprpaper";
    };

    # set hyprpaper conf (for setting initial background)
    xdg.configFile."hypr/hyprpaper.conf" = {
      text =
        let
          setWallpaper = wallpaper: ''
            preload = ${wallpaper}
            wallpaper = ,${wallpaper}
          '';
        in
        setWallpaper "/home/moritz/.config/wallpapers/a_short_walk.png";
      onChange = "${pkgs.systemd}/bin/systemctl restart --user hyprpaper.service";
    };


    # only consider graphical-session.target started when hyprland-sesstion.target is reached
    systemd.user.targets.hyprland-session = {
      wantedBy = [ "graphical-session.target" ];
    };


    # add user packages for wayland and hyprland in particular
    users.users.moritz.packages = with pkgs; [
      # pulse audio cli
      pamixer
      # control media playback
      playerctl
      # control brightness
      brightnessctl
      # screenshot tool for hyprland
      grimblast
      # region select for wayland (for screensharing)
      slurp
      # clipboard tool for wayland
      wl-clipboard
    ];


    # additional environment variables
    environment.sessionVariables =
      {
        XDG_CURRENT_DESKTOP = "Hyprland";
        XDG_SESSION_TYPE = "wayland";
        XDG_SESSION_DESKTOP = "Hyprland";
        QT_AUTO_SCREEN_SCALE_FACTOR = "1";
        QT_QPA_PLATFORM = "wayland;xcb";
        QT_WAYLAND_DISABLE_WINDOWDECORATION = "1";
        QT_QPA_PLATFORMTHEME = "qt5ct";
        _JAVA_AWT_WM_NONEREPARENTING = "1";
      } // (optionalAttrs cfg.nvidiaSupport
        {
          LIBVA_DRIVER_NAME = "nvidia";
          XDG_SESSION_TYPE = "wayland";
          GBM_BACKEND = "nvidia-drm";
          __GLX_VENDOR_LIBRARY_NAME = "nvidia";
          WLR_NO_HARDWARE_CURSORS = "1";
          __GL_VRR_ALLOWED = "0";
        });


    services = {
      dbus.enable = true;
      # use pipewire (needed for screensharing)
      pipewire = {
        enable = true;
        alsa.enable = true;
        alsa.support32Bit = true;
        pulse.enable = true;
      };
      xserver = {
        enable = true;
        displayManager = {
          lightdm.enable = true;
          autoLogin = {
            enable = true;
            user = "moritz";
          };
          defaultSession = "hyprland";
          sessionPackages = [ hyprland ]; # can't set the defaultSession otherwise
        };
      };
    };
    security.rtkit.enable = true;


    # dekstop portal (for screensharing)
    xdg.portal = {
      enable = true;
      wlr.enable = true;
      extraPortals = [ pkgs.xdg-desktop-portal-hyprland ];
    };
  };
}