{ pkgs, lib, ... }:
{
  imports = [ ./options.nix ];
  # manipulate the global /etc/zshenv for PATH, etc.
  programs.zsh.enable = true;

  system.stateVersion = 4;

  security.pam.enableSudoTouchIdAuth = true;
  system.defaults.alf.stealthenabled = 1;

  # Auto upgrade nix package and the daemon service.
  services.nix-daemon.enable = true;

  services = {
    yabai = {
      enable = true;
      enableScriptingAddition = true;
      logFile = "/var/tmp/yabai.log";
      config = {
        layout = "bsp";

        window_gap = 5;
        left_padding = 5;
        right_padding = 5;
        top_padding = 5;
        bottom_padding = 5;
        window_animation_duration = "0.3";

        window_origin_display = "cursor";
        window_placement = "second_child";
        window_shadow = "float";

        mouse_modifier = "cmd";
        mouse_action2 = "resize";
        mouse_drop_action = "swap";
        mouse_follows_focus = "off";
        focus_follows_mouse = "off";
      };
      extraConfig =
        let
          rule = "yabai -m rule";
          mkRules =
            apps: options:
            builtins.concatStringsSep "\n" (map (app: ''yabai -m rule --add app="${app}" ${options}'') apps);
          unmanaged = apps: mkRules apps "manage=off";
        in
        ''
          # auto-inject scripting additions
          yabai -m signal --add event=dock_did_restart action="sudo yabai --load-sa"
          sudo yabai --load-sa

          # ensure that there are always 10 spaces
          spacestocreate=10
          spaces=$((spacestocreate - $(yabai -m query --spaces | ${pkgs.jq}/bin/jq length)))
          while [ "$spaces" -gt 0 ]; do
            yabai -m space --create
            spaces=$((spaces - 1))
          done

          # make the spaces auto-balance
          for i in {1..10}; do
            yabai -m config --space "$i" auto_balance on
          done

          ${unmanaged [
            "CleanShot"
            "GOG Galaxy"
            "Godot"
            "JetBrains Toolbox"
            "Mullvad VPN"
            "OBS Studio"
            "Sip"
            "Steam"
            "System Settings"
            "iStat Menus"
          ]}

          # os rules
          ${rule} --add label="Finder" app="^Finder$" title="(Co(py|nnect)|Move|Info|Pref)" manage=off
          ${rule} --add label="Safari" app="^Safari$" title="^(General|(Tab|Password|Website|Extension)s|AutoFill|Se(arch|curity)|Privacy|Advance)$" manage=off
          ${rule} --add label="Orion" app="^Orion$" title="^(General|Appearance|Tabs|Browsing|Sync|Passwords|Privacy|Search|Websites|Advanced|Plus)$" manage=off

          # dev rules
          ${rule} --add label="Dash" app="^Dash$" title="^(General|Downloads|Docsets|Web Search|Integration|Snippets)$" manage=off
          ${rule} --add label="JetBrains IDE Settings" app="^(CLion|GoLand|PhpStorm|IntelliJ IDEA|PyCharm|RubyMine|RustRover|WebStorm)$" title="^(Settings|Run\/Debug Configurations|Remote Development|Welcome.+|Keyboard Shortcut|Rename|Clear Read-Only Status)$" manage=off
        '';
    };
    skhd = {
      enable = true;
      skhdConfig =
        let
          mapKeymaps =
            cmd:
            builtins.concatStringsSep "\n" (
              map (i: builtins.replaceStrings [ "Num" ] [ (toString (if (i == 10) then 0 else i)) ] cmd) (
                lib.range 1 10
              )
            );
        in
        ''
          #!/usr/bin/env sh
          # focus window
          cmd + ctrl - h : yabai -m window --focus west
          cmd + ctrl - j : yabai -m window --focus south
          cmd + ctrl - k : yabai -m window --focus north
          cmd + ctrl - l : yabai -m window --focus east
          # move window
          cmd + shift - h : yabai -m window --warp west
          cmd + shift - j : yabai -m window --warp south
          cmd + shift - k : yabai -m window --warp north
          cmd + shift - l : yabai -m window --warp east
          # toggle sticky/floating
          cmd + shift - s: yabai -m window --toggle sticky --toggle float --toggle topmost
          cmd + shift - d: yabai -m window --toggle float
          # rotate
          cmd + ctrl - e : yabai -m space --balance
          cmd + ctrl - r : yabai -m space --rotate 270
          # open terminal
          cmd + shift - return : open -na "''${HOME}/Applications/Home Manager Apps/WezTerm.app"
          # restart yabai
          cmd + alt - r : brew services restart yabai

          # ONLY WORKS WITH SIP DISABLED:
          # fast focus space left/right
          ctrl - left  : yabai -m space --focus prev
          ctrl - right : yabai -m space --focus next
          # switch to space
          ${mapKeymaps "cmd + ctrl - Num : yabai -m space --focus Num"}
          # send window to desktop, follow focus, and move out of scratchpad
          ${mapKeymaps "cmd + shift - Num : yabai -m window --space Num; yabai -m space --focus Num; yabai -m window --scratchpad ''"}

          cmd - tab : yabai -m window --toggle main
          cmd + shift - tab : yabai -m window --scratchpad main
        '';
    };
  };
}