# settings/hyprland.nix
{ config, pkgs, lib, inputs, ... }:
{
  config = lib.mkIf (config.networking.hostName == "FredOS-Gaming") {
    programs.hyprland = {
      enable = true;
      xwayland.enable = true;
    };

    xdg.portal = {
      enable = true;
      extraPortals = with pkgs; [
        xdg-desktop-portal-hyprland
        xdg-desktop-portal-gtk
      ];
      config.hyprland.default = [ "hyprland" "gtk" ];
    };

    security.polkit.enable = true;

    # Polkit GUI agent for GUI sudo prompts under Hyprland
    systemd.user.services.polkit-gnome-authentication-agent-1 = {
      description = "polkit-gnome-authentication-agent-1";
      wantedBy = [ "graphical-session.target" ];
      partOf = [ "graphical-session.target" ];
      after = [ "graphical-session.target" ];
      serviceConfig = {
        Type = "simple";
        ExecStart = "${pkgs.polkit_gnome}/libexec/polkit-gnome-authentication-agent-1";
        Restart = "on-failure";
      };
    };

    environment.systemPackages = with pkgs; [
      ghostty
      waybar
      wofi
      mako
      grim
      slurp
      wl-clipboard
      cliphist
      brightnessctl
      pamixer
      playerctl
      hyprpaper
      hyprlock
      hypridle
      hyprshot
      networkmanagerapplet
      pavucontrol
      polkit_gnome
    ];

    home-manager.users.fred = { config, lib, pkgs, ... }: {
      wayland.windowManager.hyprland = {
        enable = true;
        systemd.variables = [ "--all" ];

        settings = {
          # Pin the OC'd 190 Hz mode so we don't fall back to 60.
          monitor = "DP-2,3440x1440@190,0x0,1";

          # FredOS-Gaming has both a Ryzen iGPU (card0, 1002:164E) and a
          # Navi 22 dGPU (card1, 1002:73DF). Force aquamarine + clients onto
          # the dGPU so we don't pay PRIME-copy latency every frame.
          env = [
            "AQ_DRM_DEVICES,/dev/dri/card1"
            "WLR_DRM_DEVICES,/dev/dri/card1"
            "DRI_PRIME,pci-0000_03_00_0"
          ];

          "$mod"  = "SUPER";
          "$term" = "ghostty";
          "$menu" = "wofi --show drun";

          exec-once = [
            "waybar"
            "mako"
            "hyprpaper"
            "nm-applet --indicator"
            "wl-paste --type text  --watch cliphist store"
            "wl-paste --type image --watch cliphist store"
          ];

          general = {
            gaps_in = 6;
            gaps_out = 12;
            border_size = 2;
            layout = "dwindle";
            resize_on_border = true;
          };

          decoration = {
            rounding = 8;
            # Blur disabled — two passes at 3440x1440 was the biggest
            # contributor to per-frame compositor latency. Re-enable with
            # smaller size/passes if you miss the look.
            blur = {
              enabled = false;
            };
          };

          render = {
            direct_scanout = true; # fullscreen apps bypass compositor
          };

          animations = {
            enabled = true;
            # speed = tenths of a second; 2 = 0.2s. Drop to 1 for instant-ish.
            bezier = [
              "snap, 0.05, 0.9, 0.1, 1.0"
            ];
            animation = [
              "windows,     1, 2, snap"
              "windowsOut,  1, 2, snap, popin 80%"
              "border,      1, 3, default"
              "fade,        1, 2, default"
              "workspaces,  1, 2, snap"
            ];
          };

          input = {
            kb_layout = "gb,no";
            kb_options = "grp:alt_shift_toggle";
            follow_mouse = 1;
            accel_profile = "flat";
            sensitivity = 0;
          };

          dwindle = {
            preserve_split = true;
            pseudotile = true;
            # New windows split the focused container 50/50 — your usual
            # 2-way layout falls out of dwindle's defaults.
          };

          misc = {
            disable_hyprland_logo = true;
            disable_splash_rendering = true;
            focus_on_activate = true;
            # VRR off — the OC'd 190 Hz mode on the G34WQCP doesn't advertise
            # FreeSync, so vrr=2 was set but never actually engaged. Leaving
            # it set caused pacing weirdness; explicitly off keeps things
            # honest.
            vrr = 0;
            vfr = false; # keep compositor ticking, don't idle between frames
          };

          cursor = {
            # Counterintuitive on AMD: HW cursor plane can micro-stutter from
            # atomic KMS commits, while SW cursors get redrawn at the
            # compositor's 190 Hz rate. Many AMD users report SW feels
            # smoother. Flip back to 0 if you'd rather try the HW path.
            no_hardware_cursors = true;
            enable_hyprcursor = false;
          };

          # Mirror the GNOME bindings so muscle memory carries over
          bind = [
            "$mod, T, exec, $term"
            "$mod, E, exec, nautilus"
            "$mod, R, exec, $menu"
            "$mod, Q, killactive"
            "$mod SHIFT, E, exit"

            # Floating / layout
            "$mod, V, togglefloating"
            "$mod, F, fullscreen, 0"
            "$mod, P, pseudo"
            "$mod, S, togglesplit"


            # Focus
            "$mod, left,  movefocus, l"
            "$mod, right, movefocus, r"
            "$mod, up,    movefocus, u"
            "$mod, down,  movefocus, d"
            "$mod, H,     movefocus, l"
            "$mod, L,     movefocus, r"
            "$mod, K,     movefocus, u"
            "$mod, J,     movefocus, d"

            # Move windows
            "$mod SHIFT, left,  movewindow, l"
            "$mod SHIFT, right, movewindow, r"
            "$mod SHIFT, up,    movewindow, u"
            "$mod SHIFT, down,  movewindow, d"

            # Workspaces
            "$mod, 1, workspace, 1"
            "$mod, 2, workspace, 2"
            "$mod, 3, workspace, 3"
            "$mod, 4, workspace, 4"
            "$mod, 5, workspace, 5"
            "$mod, 6, workspace, 6"
            "$mod, 7, workspace, 7"
            "$mod, 8, workspace, 8"
            "$mod, 9, workspace, 9"
            "$mod, 0, workspace, 10"

            "$mod SHIFT, 1, movetoworkspace, 1"
            "$mod SHIFT, 2, movetoworkspace, 2"
            "$mod SHIFT, 3, movetoworkspace, 3"
            "$mod SHIFT, 4, movetoworkspace, 4"
            "$mod SHIFT, 5, movetoworkspace, 5"
            "$mod SHIFT, 6, movetoworkspace, 6"
            "$mod SHIFT, 7, movetoworkspace, 7"
            "$mod SHIFT, 8, movetoworkspace, 8"
            "$mod SHIFT, 9, movetoworkspace, 9"
            "$mod SHIFT, 0, movetoworkspace, 10"

            # Screenshots — Shift+Super+S matches your GNOME binding
            "$mod SHIFT, S, exec, hyprshot -m region --clipboard-only"
            ", Print,      exec, hyprshot -m output --clipboard-only"

            # Settings shortcut — Super+I matches your GNOME binding
            "$mod, I, exec, pavucontrol"
          ];

          bindm = [
            "$mod, mouse:272, movewindow"
            "$mod, mouse:273, resizewindow"
          ];

          bindel = [
            ", XF86AudioRaiseVolume, exec, pamixer -i 5"
            ", XF86AudioLowerVolume, exec, pamixer -d 5"
            ", XF86AudioMute,        exec, pamixer -t"
            ", XF86MonBrightnessUp,   exec, brightnessctl set 5%+"
            ", XF86MonBrightnessDown, exec, brightnessctl set 5%-"
          ];

          bindl = [
            ", XF86AudioPlay, exec, playerctl play-pause"
            ", XF86AudioNext, exec, playerctl next"
            ", XF86AudioPrev, exec, playerctl previous"
          ];
        };
      };

      home.file.".config/hypr/hyprpaper.conf".text = ''
        preload = ${config.home.homeDirectory}/.local/share/backgrounds/wallpaper.png
        wallpaper = ,${config.home.homeDirectory}/.local/share/backgrounds/wallpaper.png
        splash = false
      '';
    };
  };
}