{
  config,
  lib,
  pkgs,
  ...
}: let
  cfg = config.features.cli.apps.khal;

  mkCalendarPath = name: lib.concatStrings [ "~/Sync/.calendars/" name ];
in {
  options.features.cli.apps.khal.enable = lib.mkEnableOption "khal";
  config = lib.mkIf cfg.enable {
    home.packages = [ pkgs.khal ];
    home.shellAliases = {
      ka = "khal at";
      kc = "khal calendar";
      ke = "khal edit";
      ki = "khal interactive";
      kn = "khal new";
      kp = "khal printcalendars";
      ks = "khal search";
      kl = "khal list";
      klw = "khal list today 7d";
      klm = "khal list today 30d";
    };
    home.file."khal-config" = {
      target = ".config/khal/config";
      text = ''
        [default]
        default_calendar = school
        highlight_event_days = true

        [calendars]
          [[personal]]
          path = ${mkCalendarPath "personal"}

          [[school]]
          path = ${mkCalendarPath "school"}

        [view]
        frame = color

        [highlight_days]
        color = "light blue"
        multiple = "light magenta"

        [locale]
        # dateformat = %m/%d/%Y
        # datetimeformat = %m/%d/%Y %I:%M %p
        firstweekday = 6
        # longdateformat = %m/%d/%Y
        # longdatetimeformat = %m/%d/%Y %I:%M %p
        # timeformat = %I:%M %p
        unicode_symbols = true
        weeknumbers = off
      '';
    };
  };
}