{ config, inputs, pkgs, ... }:
let
  # Repo wallpapers are symlinked to ~/.config/wallpapers by xdg.configFile below
  wallpaperDir     = "${config.home.homeDirectory}/.config/wallpapers";
  defaultWallpaper = "${wallpaperDir}/even-in-arcadia.png";

  noctaliaIpc = pkgs.writeShellScriptBin "noctalia-ipc" ''
    set -eu
    exec noctalia msg "$@"
  '';
in
{
  imports = [ inputs.noctalia.homeModules.default ];

  home.packages = [ noctaliaIpc ];

  # Wallpapers tracked in the repo; symlinked to ~/.config/wallpapers for noctalia
  xdg.configFile."wallpapers".source = ./wallpapers;

  programs.noctalia = {
    enable = true;
    settings = {

      bar.default = {
        start                = [ "launcher" "clipboard" "volume" "brightness" "active_window" ];
        center               = [ "workspaces" ];
        end                  = [ "network" "sysmon" "battery" "notifications" "clock" "session" ];
        thickness            = 35;
        padding              = 17;
        radius               = 17;
        margin_edge          = 5;
        margin_ends          = 5;
        margin_opposite_edge = 5;
        widget_spacing       = 15;
        background_opacity   = 0.9;
        border               = "outline";
        capsule              = true;
        capsule_fill         = "surface_variant";
        capsule_opacity      = 1.0;
        capsule_padding      = 6.0;
        capsule_thickness    = 0.76;
        contact_shadow       = true;
        panel_overlap        = 1;
        shadow               = true;
        hover_highlight      = true;
        concave_edge_corners = true;

        # cpu + ram rendered as one capsule labelled "sysmon"
        capsule_group = [
          {
            id      = "sysmon";
            members = [ "cpu" "ram" ];
            fill    = "surface_variant";
            opacity = 1.0;
            padding = 6.0;
          }
        ];
      };

      dock = {
        enabled              = true;
        # Desktop entry IDs (filename without .desktop)
        pinned               = [ "zen" "codium" "com.mitchellh.ghostty" "thunar" "claude" ];
        position             = "bottom";
        smart_auto_hide      = true;
        icon_size            = 20;
        radius               = 15;
        show_dots            = true;
        show_running         = true;
        show_instance_count  = true;
        magnification        = true;
        magnification_scale  = 1.35;
        background_opacity   = 1.0;
        border               = "outline";
        concave_edge_corners = true;
        shadow               = true;
        main_axis_padding    = 20;
        cross_axis_padding   = 10;
        item_spacing         = 5;
        inactive_opacity     = 0.85;
        inactive_scale       = 0.85;
      };

      idle = {
        # screen turns off first, then locks after
        behavior_order = [ "screen-off" "lock" ];
        behavior = {
          screen-off = {
            action  = "screen_off";
            enabled = true;
            timeout = 300;   # 5 min
          };
          lock = {
            action  = "lock";
            enabled = true;
            timeout = 600;   # 10 min
          };
        };
      };

      lockscreen.wallpaper = defaultWallpaper;

      nightlight.enabled = true;

      osd.position = "top_right";

      shell = {
        font_family         = "JetBrainsMono Nerd Font";
        polkit_agent        = true;
        corner_radius_scale = 1.0;
        animation.speed     = 2.0;
        panel = {
          clipboard_placement = "attached";
          launcher_placement  = "attached";
        };
        shadow.alpha = 0.5;
      };

      # Theme follows wallpaper colours (Catppuccin palette, muted scheme, dark mode)
      theme = {
        builtin          = "Catppuccin";
        source           = "wallpaper";
        mode             = "dark";
        wallpaper_scheme = "muted";
      };

      wallpaper = {
        enabled      = true;
        directory    = wallpaperDir;
        default.path = defaultWallpaper;
      };

    };
  };
}