{ config, lib, pkgs, ... }:

{
  imports =
    [
      ./hardware-configuration.nix
    ];

  security.pam.loginLimits = [{
    domain = "*";
    type = "soft";
    item = "nofile";
    value = "8192";
  }];
  nix.settings.experimental-features = [ "nix-command" "flakes" ];
  nix.settings.download-buffer-size = 6710886400;
  boot.loader.grub.enable = true;
  boot.loader.grub.device = "/dev/sda"; # or "nodev" for efi only

  networking.hostName = "authentik";
  networking.interfaces.ens18.ipv4.addresses = [
    {
      address = "141.56.51.18";
      prefixLength = 24;
    }
  ];
  networking.defaultGateway.address = "141.56.51.254";
  networking.nameservers = [ "141.56.1.1" "141.56.1.2" ];

  time.timeZone = "Europe/Berlin";

  i18n.defaultLocale = "en_US.UTF-8";
  console = {
    font = "Lat2-Terminus16";
    keyMap = lib.mkForce "de";
    useXkbConfig = true; # use xkb.options in tty.
  };

  users.groups.authentik = { };
  users.users.authentik = {
    isSystemUser = true;
    extraGroups = [ "docker" ];
    group = "authentik";
  };
  users.users.administration = {
    isNormalUser = true;
    extraGroups = [ "wheel" "docker" ]; # Enable ‘sudo’ for the user.
    packages = with pkgs; [
    ];
  };

  environment.systemPackages = with pkgs; [
    tmux
    git
    htop
    neovim
  ];

  services.openssh.enable = true;
  services.authentik = {
    enable = true;
    # The environmentFile needs to be on the target host!
    # Best use something like sops-nix or agenix to manage it
    environmentFile = "/var/lib/authentik_secret";
    settings = {
      email = {
        host = "mail.stura.htw-dresden.de";
        port = 25;
        username = "authentik@stura.htw-dresden.de";
        use_tls = false;
        use_ssl = false;
        from = "authentik@stura.htw-dresden.de";
      };
      disable_startup_analytics = true;
      avatars = "initials";
    };

    nginx = {
      enable = true;
      enableACME = true;
      host = "auth.htw.stura-dresden.de";
    };
  };
  services.dovecot2 = {
    extraConfig = ''
      auth_verbose = yes
      auth_debug = yes
      auth_debug_passwords = yes
    '';
  };

  services.nginx.virtualHosts."auth.htw.stura-dresden.de".locations."/".extraConfig = ''
    proxy_set_header X-Forwarded-Proto $scheme;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
  '';
  mailserver = {
    enable = true;
    fqdn = "mail.htw.stura-dresden.de";
    domains = [ "htw.stura-dresden.de" ];
    ldap = {
      enable = true;
      bind = {
        dn = "cn=dovecot,ou=users,dc=auth,dc=htw,dc=stura-dresden,dc=de";
        passwordFile = "/var/lib/dovecot_ldap_passwd";
      };
      dovecot = { };
      searchBase = "dc=auth,dc=htw,dc=stura-dresden,dc=de";
      searchScope = "sub";
      uris = [
        "ldap://localhost:389"
      ];
    };

    certificateScheme = "acme-nginx";
  };

  virtualisation.docker.enable = true;
  security.acme.acceptTerms = true;
  security.acme.defaults.email = "cert@stura.htw-dresden.de";

  networking.firewall.allowedTCPPorts = [ 80 443 389 9000 ];

  system.stateVersion = "24.11";

}