{
  config,
  lib,
  pkgs,
  self,
  ...
}:
let
  inherit (lib.meta) getExe;
  inherit (lib.lists) singleton;
  inherit (lib.modules) mkIf;

  inherit (config.meta.mainUser) username;
  inherit (config.meta.system) isWorkstation;

  toml = pkgs.formats.toml { };
  jj-config = toml.generate "config.toml" {
    user = {
      email = "fau@faukah.com";
      name = "faukah";
    };
    aliases = {
      c = [ "commit" ];
      ci = [
        "commit"
        "--interactive"
      ];
      e = [ "edit" ];
      i = [
        "git"
        "init"
        "--colocate"
      ];
      nb = [
        "bookmark"
        "create"
        "-r @-"
      ];
      pull = [
        "git"
        "fetch"
      ];
      push = [
        "git"
        "push"
        "--allow-new"
      ];
      r = [ "rebase" ];
      s = [ "squash" ];
      si = [
        "squash"
        "--interactive"
      ];
      tug = [
        "bookmark"
        "move"
        "--from"
        "closest_bookmark(@-)"
        "--to"
        "@-"
      ];
    };
    git = {
      # colocate = true;
      push-new-bookmarks = true;
    };
    revset-aliases."closest_bookmark(to)" = "heads(::to & bookmarks())";
    signing = {
      backend = "ssh";
      behavior = "drop";
      key = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAILPiRe9OH/VtWFWyy5QbAVcN7CLxr4zUtRCwmxD6aeN6";
    };
    template-aliases = {
      "format_short_id(id)" = "id.shortest()";
      "format_timestamp(timestamp)" = "timestamp.ago()";
    };
    templates = {
      draft_commit_description = ''
        concat(
          coalesce(description, "\n"),
          surround(
            "\nJJ: This commit contains the following changes:\n", "",
            indent("JJ:     ", diff.stat(72)),
          ),
          "\nJJ: ignore-rest\n",
          diff.git(),
        )
      '';
    };
    ui = {
      default-command = "log";
      diff-editor = ":builtin";
      diff-formatter = [
        "${getExe pkgs.difftastic}"
        "--color"
        "always"
        "$left"
        "$right"
      ];
      movement = {
        edit = true;
      };
      pager = [
        "${getExe pkgs.bat}"
        "--plain"
      ];
    };
  };

  inherit (config.age.secrets) organizationScope uniScope;
  jj-wrapped = pkgs.symlinkJoin {
    name = "jj-wrapped";
    paths = singleton [ pkgs.jujutsu ];
    nativeBuildInputs = [ pkgs.makeWrapper ];
    postBuild = ''
      wrapProgram $out/bin/jj --add-flags " --config-file ${organizationScope.path} --config-file ${uniScope.path}"
    '';
  };
in
{
  hjem.users.${username}.xdg.config.files."jj/config.toml".source = jj-config;
  age.secrets.organizationScope = mkIf isWorkstation {
    file = "${self}/secrets/organization_scope.age";
    owner = username;
  };
  age.secrets.uniScope = mkIf isWorkstation {
    file = "${self}/secrets/uni_scope.age";
    owner = username;
  };
  environment.systemPackages = singleton (if isWorkstation then jj-wrapped else pkgs.jujutsu);

}