{
  pkgs,
  config,
  lib,
  ...
}:
with lib;
let
  cfg = config.eboskma.programs.jujutsu;
in
{
  options.eboskma.programs.jujutsu = {
    enable = mkEnableOption "jujutsu";
    name = mkOption {
      description = "your name";
      type = types.nonEmptyStr;
    };

    email = mkOption {
      description = "your e-mail address";
      type = types.nonEmptyStr;
    };

    signingKey = mkOption {
      description = "your signing key";
      type = types.nullOr types.str;
      default = null;
    };

    signingBackend = mkOption {
      description = "the type of signing key";
      type = types.enum [
        "gpg"
        "ssh"
      ];
      default = "openpgp";
    };
  };

  config = mkIf cfg.enable {
    programs.jujutsu = {
      enable = true;
      ediff = false;

      settings = {
        user = {
          name = cfg.name;
          email = cfg.email;
        };

        core = {
          fsmonitor = "watchman";
          watchman.register_snapshot_triggers = true;
        };

        ui = {
          diff = {
            tool = "difftastic";
          };
          pager = lib.getExe pkgs.bat;
        };

        merge-tools = {
          difftastic = {
            program = lib.getExe pkgs.difftastic;
            diff-args = [
              "--color=always"
              "--background=dark"
              "--display=side-by-side-show-both"
              "$left"
              "$right"
            ];

          };
        };
        signing = {
          sign-all = true;
          backend = cfg.signingBackend;
          key = cfg.signingKey;
        };

      };
    };

    home.packages = with pkgs; [ watchman ];
  };
}