{ config, lib, ... }: let
  cfg = config.homelab.communications.mattermost;
  full-domain = lib.strings.concatStrings [cfg.subdomain "." cfg.domain];
in {
  options.homelab.communications.mattermost = {
    enable = lib.mkEnableOption "mattermost";
    domain = lib.mkOption {
      description = "The domain under which to serve the mattermost server.";
      type = lib.types.str;
      default = config.networking.domain;
      example = "example.com";
    };
    subdomain = lib.mkOption {
      description = "The subdomain under which to serve the mattermost server.";
      type = lib.types.str;
      default = "mattermost";
      example = "chat";
    };
  };
  config = lib.mkIf cfg.enable {
    services.mattermost = {
      enable = true;
      host = full-domain;
      siteName = "CompSciClub";
      dataDir = "/srv/mattermost";
    };
    services.caddy.virtualHosts.${full-domain}.extraConfig = ''
      reverse_proxy http://127.0.0.1:8065 {}
    '';
  };
}