# settings/hyprland.nix
{ config, pkgs, lib, inputs, ... }:
let
  hyprland-pkgs = inputs.hyprland.packages.${pkgs.stdenv.hostPlatform.system};

  isMacbook = config.networking.hostName == "FredOS-Macbook";

  # GPU pinning env vars — only needed on the dual-GPU gaming box (card1 = Navi 22).
  gpuEnv = lib.optionals (config.networking.hostName == "FredOS-Gaming") [
    "AQ_DRM_DEVICES,/dev/dri/card1"
    "WLR_DRM_DEVICES,/dev/dri/card1"
    "DRI_PRIME,pci-0000_03_00_0"
  ];

  # hyprutils-0.13.1 requires GLIBCXX_3.4.34 (GCC 15) but Hyprland's RPATH
  # was patched to gcc-14.3.0-lib which only provides up to GLIBCXX_3.4.33.
  # Use our nixpkgs GCC 15 to supply the missing symbol via LD_PRELOAD.
  gcc15-stdlib = pkgs.gcc15.cc.lib;

  hyprland-wrapped = pkgs.symlinkJoin {
    name    = hyprland-pkgs.hyprland.name;
    version = hyprland-pkgs.hyprland.version;
    paths = [ hyprland-pkgs.hyprland ];
    nativeBuildInputs = [ pkgs.makeWrapper ];
    # passthru inside symlinkJoin flows through runCommand → mkDerivation,
    # which correctly sets drv.passthru.  The display manager requires
    # providedSessions; HM's hyprland module requires override.
    passthru = {
      providedSessions = [ "hyprland" ];
      override = _: hyprland-wrapped;
    };
    postBuild = ''
      wrapProgram $out/bin/start-hyprland \
        --set LD_PRELOAD "${gcc15-stdlib}/lib/libstdc++.so.6"
      wrapProgram $out/bin/Hyprland \
        --set LD_PRELOAD "${gcc15-stdlib}/lib/libstdc++.so.6"

      # The session .desktop symlinks to the original package and contains
      # its absolute store path.  Rewrite Exec= to our wrapped binary so
      # GDM actually launches the LD_PRELOAD wrapper, not the bare binary.
      desktop=$out/share/wayland-sessions/hyprland.desktop
      orig=$(readlink -f "$desktop")
      rm "$desktop"
      sed "s|^Exec=.*|Exec=$out/bin/start-hyprland|" "$orig" > "$desktop"
    '';
  };
in
{
  config = lib.mkIf (lib.elem config.networking.hostName [ "FredOS-Gaming" "FredOS-Macbook" ]) {
    programs.hyprland = {
      enable = true;
      xwayland.enable = true;
      package      = hyprland-wrapped;
      portalPackage = hyprland-pkgs.xdg-desktop-portal-hyprland;
    };

    xdg.portal = {
      enable = true;
      # xdg-desktop-portal-hyprland is registered automatically by
      # programs.hyprland.portalPackage; listing it here too produced a
      # duplicate user-unit symlink during nixos-rebuild.
      extraPortals = with pkgs; [
        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
      mako
      grim
      slurp
      wl-clipboard
      cliphist
      brightnessctl
      pamixer
      swayosd
      playerctl
      hyprpaper
      hyprlock
      hypridle
      hyprshot
      networkmanagerapplet
      pavucontrol
      polkit_gnome
    ];

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

        settings = {
          # monitor is set per-host in hosts/FredOS-{Gaming,Macbook}.nix
          env = [
            # Clear the LD_PRELOAD set by the start-hyprland wrapper so it
            # doesn't leak into child processes (Steam, games, etc.).
            "LD_PRELOAD,"

            # Keep these in sync with stylix.cursor in settings/stylix.nix.
            "XCURSOR_THEME,Bibata-Modern-Ice"
            "XCURSOR_SIZE,24"
            "HYPRCURSOR_THEME,Bibata-Modern-Ice"
            "HYPRCURSOR_SIZE,24"

            # Prefer native Wayland backends where the app supports it.
            "ELECTRON_OZONE_PLATFORM_HINT,wayland"  # Vesktop, VSCodium
            "MOZ_ENABLE_WAYLAND,1"                  # Zen / Firefox family
            "QT_QPA_PLATFORM,wayland;xcb"           # Qt apps, XWayland fallback
            "SDL_VIDEODRIVER,wayland"               # SDL apps
            "_JAVA_AWT_WM_NONREPARENTING,1"         # Java tiling fix
          ] ++ gpuEnv;

          "$mod"  = "SUPER";
          "$term" = "ghostty";
          "$menu" = "killall anyrun || anyrun";

          exec-once = [
            "mako"
            "nm-applet --indicator"
            "wl-paste --type text  --watch cliphist store"
            "wl-paste --type image --watch cliphist store"
            "hyprctl setcursor Bibata-Modern-Ice 24"
            "swayosd-server"
          ] ++ lib.optionals isMacbook [ "hypridle" ];

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

          decoration = {
            rounding = 8;
            blur = {
              enabled = true;
            };
          };

          render = {
            direct_scanout = false;
          };

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

          input = {
            kb_layout = "gb,no";
            kb_options = "grp:alt_shift_toggle";
            follow_mouse = 1;
            accel_profile = "flat";
            sensitivity = 0;
          } // lib.optionalAttrs isMacbook {
            touchpad = {
              tap-to-click = true;
              tap_button_map = "lrm"; # 1-finger=left, 2-finger=right, 3-finger=middle
              natural_scroll = true;
            };
          };

          cursor = {
            no_warps = true; # don't teleport the cursor on focus changes
          };

          dwindle = {
            preserve_split = 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;
            # Apps demanding attention don't get to yank focus — they'll
            # show as urgent in the bar instead. Pairs with cursor.no_warps
            # below; without that, focus jumps drag the cursor with them.
            focus_on_activate = false;
            vrr = 2; # always on — should engage at the 180 Hz EDID mode
          };

          # vfr moved from misc: to debug: in 0.55.0
          debug = {
            vfr = false; # keep compositor ticking, don't idle between frames
            disable_logs = false;
          };

          # Mirror the GNOME bindings so muscle memory carries over
          bind = [
            "$mod, T, exec, $term"
            "$mod, E, exec, nemo"
            "$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, layoutmsg, togglesplit"


            # Focus
            "$mod, left,  movefocus, l"
            "$mod, right, movefocus, r"
            "$mod, up,    movefocus, u"
            "$mod, down,  movefocus, d"
            "$mod, H,     movefocus, l"
            "$mod, K,     movefocus, u"
            "$mod, J,     movefocus, d"
            # L freed for hyprlock — arrow keys still handle right-focus.

            # Power menu — toggle: kills anyrun if already open
            "$mod, L, exec, killall anyrun || ${pkgs.writeShellScript "power-menu" ''
              choice=$(printf '%s\n' \
                $'   Lock' \
                $'   Logout' \
                $'   Reboot' \
                $'   Shutdown' \
                | ${pkgs.anyrun}/bin/anyrun \
                    --plugins "${pkgs.anyrun}/lib/libstdin.so" \
                    --show-results-immediately true \
                    --hide-plugin-info true \
                    --close-on-click true)
              case "$choice" in
                *Lock)     ${pkgs.hyprlock}/bin/hyprlock ;;
                *Logout)   hyprctl dispatch exit ;;
                *Reboot)   systemctl reboot ;;
                *Shutdown) systemctl poweroff ;;
              esac
            ''}"

            # 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"

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

            # Custom - shortcuts:
            "$mod, z, exec, zen-beta"

          ];

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

          bindel = [
            ", XF86AudioRaiseVolume, exec, swayosd-client --output-volume raise"
            ", XF86AudioLowerVolume, exec, swayosd-client --output-volume lower"
            ", XF86AudioMute,        exec, swayosd-client --output-volume mute-toggle"
            ", XF86MonBrightnessUp,   exec, swayosd-client --brightness raise"
            ", XF86MonBrightnessDown, exec, swayosd-client --brightness lower"
          ] ++ lib.optionals isMacbook [
            ", XF86KbdBrightnessUp,   exec, brightnessctl -d smc::kbd_backlight set +10%"
            ", XF86KbdBrightnessDown, exec, brightnessctl -d smc::kbd_backlight set 10%-"
          ];

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

      programs.anyrun = {
        enable = true;
        config = {
          plugins = [ "${pkgs.anyrun}/lib/libapplications.so" ];
          x.fraction = 0.5;
          y.fraction = 0.25;
          width.absolute = 350;
          height.absolute = 0;
          margin = 16;
          hideIcons = false;
          ignoreExclusiveZones = false;
          layer = "overlay";
          hidePluginInfo = true;
          closeOnClick = true;
          maxEntries = 8;
        };
        extraCss =
          let c = config.lib.stylix.colors; in
          ''
            * { all: unset; font-family: "FiraMono Nerd Font", monospace; font-size: 13px; }
            window { background: transparent; }
            box.main {
              background: #${c.base00};
              border: 1px solid #${c.base03};
              border-radius: 10px;
              padding: 8px;
              margin: 16px;
            }
            text {
              background: #${c.base01};
              color: #${c.base05};
              caret-color: #${c.base0D};
              padding: 8px 16px;
              border-radius: 6px;
              min-height: 0;
            }
            list.plugin { background: transparent; }
            .matches    { background: transparent; }
            .match {
              padding: 4px 16px;
              border-radius: 6px;
              color: #${c.base05};
              background: transparent;
            }
            .match:selected {
              background: #${c.base02};
              border: none;
            }
            label.match.description { color: #${c.base04}; font-size: 11px; }
          '';
        extraConfigFiles."applications.ron".text = ''
          Config(
            desktop_actions: false,
            max_entries: Some(8),
            terminal: Some("ghostty"),
          )
        '';
      };

      programs.hyprlock.enable = true;

      services.hypridle = lib.mkIf isMacbook {
        enable = true;
        settings = {
          general = {
            lock_cmd        = "pidof hyprlock || hyprlock";
            before_sleep_cmd = "loginctl lock-session";
            after_sleep_cmd  = "hyprctl dispatch dpms on";
          };
          listener = [
            {
              timeout    = 300;   # 5 min — lock
              on-timeout = "loginctl lock-session";
            }
            {
              timeout    = 420;   # 7 min — display off
              on-timeout = "hyprctl dispatch dpms off";
              on-resume  = "hyprctl dispatch dpms on";
            }
            {
              timeout    = 600;   # 10 min — suspend
              on-timeout = "systemctl suspend";
            }
          ];
        };
      };

      # Scope all HM Wayland services (hyprpaper, waybar, …) to the
      # Hyprland session so they don't crash-loop in a GNOME session.
      wayland.systemd.target = "hyprland-session.target";

      programs.waybar = {
        enable = true;
        systemd.enable = true;

        settings.mainBar = {
          layer = "top";
          position = "top";
          height = 30;
          spacing = 6;

          modules-left   = [ "hyprland/workspaces" ];
          modules-center = [ "clock" ];
          modules-right  = lib.optionals isMacbook [ "battery" ] ++ [ "group/tray-drawer" ];

          "hyprland/workspaces" = {
            format = "{name}";
            on-click = "activate";
            sort-by-number = true;
          };

          clock = {
            format = "{:%H:%M}";
            tooltip-format = "<big>{:%A, %d %B %Y}</big>\n<tt><small>{calendar}</small></tt>";
          };

          "group/tray-drawer" = {
            orientation = "horizontal";
            drawer = {
              transition-duration = 500;
              transition-left-to-right = false;
            };
            modules = [ "custom/tray-handle" "pulseaudio" "tray" ];
          };

          "custom/tray-handle" = {
            format = ""; # Nerd Font arrow
            tooltip = false;
          };

          # Pulseaudio module, now conditionally visible
          pulseaudio = {
            format = "{icon} {volume}%";
            format-muted = "  muted";
            format-icons = {
              default = [ "" "" "" ];
              headphone = "";
              headset = "";
            };
            on-click = "pavucontrol";
            scroll-step = 5;
          };

          # Tray module, now conditionally visible
          tray = {
            icon-size = 16;
            spacing = 8;
          };
        } // lib.optionalAttrs isMacbook {
          battery = {
            format = "{capacity}% {icon}";
            format-charging = "{capacity}% ";
            format-icons = [ "" "" "" "" "" ];
            states = { warning = 30; critical = 15; };
          };
        };

        style = ''
          * {
            font-family: "FiraMono Nerd Font", monospace;
            font-size: 13px;
            min-height: 0;
            border: none;
            border-radius: 0;
          }

          window#waybar {
            background: alpha(@base00, 0.82);
            color: @base05;
          }

          #workspaces {
            margin-left: 6px;
          }

          #workspaces button {
            padding: 0 8px;
            color: @base03;
            background: transparent;
          }

          #workspaces button.active {
            color: @base05;
          }

          #workspaces button:hover {
            background: alpha(@base05, 0.08);
            color: @base05;
            box-shadow: none;
            text-shadow: none;
          }

          #clock {
            color: @base05;
            font-weight: 500;
          }

          #pulseaudio,
          #tray {
            padding: 0 10px;
            color: @base05;
          }

          #pulseaudio.muted,
          #network.disconnected {
            color: @base03;
          }

          #tray {
            margin-right: 6px;
          }

          #custom-tray-toggle {
            padding: 0 0px;
            color: @base05;
          }

          #battery {
            padding: 0 10px;
            color: @base05;
          }
          #battery.warning { color: @base0A; }
          #battery.critical { color: @base08; }
        '';
      };
    };
  };
}