{ config, lib, pkgs, ... }:
with lib;
let
  debug = true;
  #version = "latest";
  # version = "142c079"; # 2 years ago.
  # version = "v1.14.0"; # 2 years ago.
  version = "v1.13.2"; # 2 years ago.
in
{
  virtualisation.oci-containers = {
    containers.screeps = {
      volumes = [
        "/srv/screeps:/screeps"
        (optionalString debug "/srv/screeps-tmp:/tmp")
      ];
      environment.TZ = "Europe/Berlin";
      image = "screepers/screeps-launcher:${version}";
      ports = [ "21025:21025" ];
    };
  };

  systemd.services.docker-screeps =
    let
      configuration = builtins.toJSON {
        steamKey = "keyFromStep3";
        version = "latest";
        mods = [
          #"screepsmod-auth"
          #"screepsmod-admin-utils"
          #"screepsmod-mongo"
        ];
        bots = {
          simplebot = "screepsbot-zeswarm";
        };
        serverConfig = {
          welcomeText = "<h1 style=\"text-align: center;\">My Cool Server</h1>";
          constants = {
            "TEST_CONSTANT" = 123;
          };
          tickRate = 1000;
        };
      };
    in
    {

      unitConfig = {
        StartLimitInterval = 200;
        StartLimitBurst = 2;
      };

      serviceConfig = {
        Restart = mkForce (if debug then "no" else "always");
        RestartSec = 30;
        ExecStartPre = [
          (toString (pkgs.writers.writeDash "create-screeps-config" ''
            mkdir -p /srv/screeps/
            chown 1000:1000 -R /srv/screeps
            ${optionalString debug "mkdir -p /srv/screeps-tmp"}
            ${optionalString debug "chown 1000:1000 -R /srv/screeps-tmp"}
            echo '${configuration}' > /srv/screeps/config.yaml
          ''))
        ];
      };
    };

  #networking.firewall.allowedTCPPorts = [ 8123 ];
  #networking.firewall.allowedUDPPorts = [ 8123 ];

  #networking.firewall.interfaces.wg0.allowedTCPPorts = [ 8123 ];
  #networking.firewall.interfaces.wg0.allowedUDPPorts = [ 8123 ];

}