lux/modules/features/niri/default.nix

{
  inputs,
  config,
  ...
}:
let
  metaLib = config.meta.lib;
in
{
  flake.modules.nixos.niri =
    { pkgs, ... }:
    {
      imports = [ inputs.niri.nixosModules.niri ];
      nixpkgs.overlays = [ inputs.niri.overlays.niri ];

      programs.niri.enable = true;
      programs.niri.package = pkgs.niri-unstable;
      programs.dconf.enable = true;

      services.gvfs.enable = true;
      services.udisks2.enable = true;
      xdg.portal.enable = true;
    };

  flake.modules.homeManager.niri =
    {
      config,
      lib,
      pkgs,
      ...
    }:
    let
      hostInput = config.meta.host.input;

      outputs = lib.mapAttrs (
        _: display:
        {
          position = {
            x = display.x;
            y = display.y;
          };
        }
        // lib.optionalAttrs (display.primary or false) {
          "focus-at-startup" = true;
        }
        // lib.optionalAttrs (display ? scale) {
          inherit (display) scale;
        }
        // lib.optionalAttrs (display ? mode) {
          inherit (display) mode;
        }
      ) config.meta.host.displays;
      terminalPackage = metaLib.resolvePackagePath {
        inherit pkgs;
        path = config.meta.user.terminalPackagePath;
      };
      hasMainProgram = terminalPackage != null && terminalPackage ? meta.mainProgram;

      mouseSettings = lib.filterAttrs (_: value: value != null) {
        accel-profile = hostInput.mouse.accelProfile;
        accel-speed = hostInput.mouse.accelSpeed;
        left-handed = hostInput.mouse.leftHanded;
        middle-emulation = hostInput.mouse.middleEmulation;
        natural-scroll = hostInput.mouse.naturalScrolling;
        scroll-method = hostInput.mouse.scrollMethod;
      };

      touchpadSettings = lib.filterAttrs (_: value: value != null) {
        accel-profile = hostInput.touchpad.accelProfile;
        accel-speed = hostInput.touchpad.accelSpeed;
        click-method = hostInput.touchpad.clickMethod;
        dwt = hostInput.touchpad.disableWhileTyping;
        left-handed = hostInput.touchpad.leftHanded;
        middle-emulation = hostInput.touchpad.middleEmulation;
        natural-scroll = hostInput.touchpad.naturalScrolling;
        scroll-method = hostInput.touchpad.scrollMethod;
        tap = hostInput.touchpad.tapping;
      };
    in
    {
      assertions = [
        {
          assertion = terminalPackage != null;
          message = "Unknown terminal package `${lib.showAttrPath config.meta.user.terminalPackagePath}` for user `${config.meta.user.name}`.";
        }
        {
          assertion = hasMainProgram;
          message = "Terminal package `${lib.showAttrPath config.meta.user.terminalPackagePath}` must define `meta.mainProgram`.";
        }
      ];

      home.sessionVariables.NIXOS_OZONE_WL = "1";

      dconf.settings = {
        "org/gnome/desktop/interface" = {
          color-scheme = "prefer-dark";
        };
      };

      home.packages = with pkgs; [
        playerctl
        nautilus
        brightnessctl
        xwayland-satellite
      ];

      programs.niri.settings = {
        inherit outputs;
        environment.DISPLAY = ":0";
        spawn-at-startup = [
          { command = [ "xwayland-satellite" ]; }
          { command = [ "noctalia-shell" ]; }
          { command = [ "qbittorrent" ]; }
        ];
        prefer-no-csd = true;
        hotkey-overlay.skip-at-startup = true;
        screenshot-path = "${config.xdg.userDirs.pictures}/screenshots/%Y-%m-%dT%H:%M:%S.png";

        animations.slowdown = 0.6;

        cursor = with config.home.pointerCursor; {
          size = size;
          theme = name;
          hide-after-inactive-ms = 3000;
          hide-when-typing = true;
        };

        layout = {
          always-center-single-column = true;
          gaps = 14;
          focus-ring.enable = false;

          default-column-width.proportion = 1. / 2.;

          border = {
            enable = true;
            width = 3;
            active.color = "#7E9CD8";
            inactive.color = "#54546D";
            urgent.color = "#E82424";
          };
        };

        window-rules = [
          {
            geometry-corner-radius =
              let
                radius = 10.0;
              in
              {
                bottom-left = radius;
                bottom-right = radius;
                top-left = radius;
                top-right = radius;
              };
            clip-to-geometry = true;
          }
        ];

        debug.honor-xdg-activation-with-invalid-serial = true;

        input = {
          focus-follows-mouse.enable = true;
          keyboard = {
            repeat-delay = 300;
            repeat-rate = 50;
            xkb.options = "caps:escape";
          };
        }
        // lib.optionalAttrs (mouseSettings != { }) {
          mouse = mouseSettings;
        }
        // lib.optionalAttrs (touchpadSettings != { }) {
          touchpad = touchpadSettings;
        };

        binds =
          if hasMainProgram then
            import ./_bindings.nix {
              inherit
                lib
                terminalPackage
                ;
            }
          else
            { };
      };
    };
}