{ lib, ... }:
{
  checks = [
    {
      assertion = entries: lib.all (entry: entry.value.keys != [ ]) entries;
      message = "Desktop keybinds must set at least one key.";
    }
  ];

  type = lib.types.submodule {
    options = {
      keys = lib.mkOption {
        type = lib.types.listOf lib.types.str;
        example = [
          "SUPER"
          "Return"
        ];
        description = "Sets the ordered key parts for this desktop keybind.";
      };

      action = lib.mkOption {
        type = lib.types.submodule {
          freeformType = lib.types.attrsOf lib.types.anything;

          options.type = lib.mkOption {
            type = lib.types.enum [
              "exec"
              "focus"
              "move-window"
              "resize-window"
              "toggle-floating"
              "fullscreen"
              "layout"
              "close-window"
              "kill-window"
              "focus-workspace"
              "move-to-workspace"
            ];
            description = "Selects the desktop action this keybind triggers.";
          };
        };
        description = "Declares the desktop action for this keybind.";
      };
    };
  };
}