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

let yggaddr = import ./yggaddr.nix;
in {
  imports = [
    # <nixpkgs/nixos/modules/profiles/minimal.nix>
    ../../lib
    ../../lib/default-gateway.nix
    ./borgbackup.nix
    ./containers
    ./hardware-configuration.nix
    ./hydra.nix
    ./nix-serve.nix
  ];

  security.acme = {
    email = " mail@c3d2.de";
    acceptTerms = true;
  };

  c3d2 = {
    users = {
      emery = true;
      windsleep = true;
    };
    isInHq = true;
    mapHqHosts = true;
    hq = {
      interface = "br0";
      statistics.enable = true;
    };
  };

  fileSystems."/srv/ceph" = {
    device = "172.22.99.13:6789:/";
    fsType = "ceph";
    options = [
      "name=storage2"
      "secret=AQAvRhxcaCK0IxAAnoe00oiopcpQeKZgL02RWw=="
      "noatime,_netdev"
      "noauto"
      "x-systemd.automount"
      "x-systemd.device-timeout=175"
      "users"
    ];
  };

  # Route IPv6
  boot.kernel.sysctl."net.ipv6.conf.all.forwarding" = 1;
  # Obtain global IPv6 despite being a router myself
  boot.kernel.sysctl."net.ipv6.conf.eth0.accept_ra" = 2;

  services.yggdrasil = {
    enable = true;
    configFile = "/var/lib/yggdrasil/keys";
    config.Peers = [
      "tcp://[2a03:3b40:fe:ab::1]:46370" # Praha
      "tcp://ygg.thingylabs.io:443" # Nürnberg
      "tcp://176.223.130.120:22632" # Wrocław
      "tcp://[2a05:9403::8b]:7743" # Praha
    ];
  };

  security.sudo.wheelNeedsPassword = false;
  services.openssh = {
    enable = true;
    passwordAuthentication = false;
    # DO NOT CHANGE, KINDERGARTEN IS OVER
  };

  programs.mosh.enable = true;

  nix = {
    package = pkgs.nixFlakes;
    gc.automatic = true;
    optimise.automatic = true;
    extraOptions = ''
      experimental-features = nix-command flakes ca-references
      post-build-hook = ${
        pkgs.writeScript "post-build-sign-paths" ''
          #!${pkgs.runtimeShell}
          nix sign-paths --key-file /var/lib/nix-serve.key $OUT_PATHS
        ''
      }
    '';
  };
  nixpkgs.overlays = [
    (self: super: {
      nix = super.nix // { meta.platforms = lib.platforms.linux; };
    })
  ];

  virtualisation.docker.enable = true;

  networking = {
    firewall.enable = false;
    firewall.trustedInterfaces = [ "br0" ];
    hostName = "server7";
    hostId = "454fe12c";
    useDHCP = false;
    bridges.br0.interfaces = [ "enp2s0f0" ];
    interfaces = {
      br0 = {
        useDHCP = true;
        tempAddress = "disabled";
        ipv4.addresses = [{
          address = "172.22.99.245";
          prefixLength = 24;
        }];
        ipv6.addresses = [{
          address = yggaddr.prefix64 + "::1";
          prefixLength = 64;
        }];
      };
      enp2s0f1.useDHCP = false;
    };
  };

  boot.kernel.sysctl."net.bridge.bridge-nf-call-arptables" = 0;
  boot.kernel.sysctl."net.bridge.bridge-nf-call-iptables" = 0;
  boot.kernel.sysctl."net.bridge.bridge-nf-call-ip6tables" = 0;

  environment.systemPackages = with pkgs; [
    tmux
    htop
    vim
    gitMinimal
    nixfmt
    zfsStable
  ];

  services.collectd.extraConfig = ''
    LoadPlugin memory
    LoadPlugin processes
    LoadPlugin disk
    LoadPlugin df
    LoadPlugin cpu
    LoadPlugin entropy
    LoadPlugin load
    LoadPlugin swap
    LoadPlugin cgroups
    LoadPlugin vmem
    LoadPlugin interface
  '';

  boot.tmpOnTmpfs = true;

  # Use the systemd-boot EFI boot loader.
  boot.loader = {
    systemd-boot.enable = true;
    efi.canTouchEfiVariables = true;
  };

  time.timeZone = "Europe/Berlin";

  system.stateVersion = "19.09"; # Did you read the comment?

  users.extraUsers.hydra.openssh.authorizedKeys.keys = [
    # allow the old hydra to build here
    "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC7HuDlyTlPC4rCjwhklY8kiYIxdgPhiu6wxs29ksnpKZmJa2R7qoD02N3ACm9cTb1GVkIWukAXI3KvU9h08+WLQJqUH0cHVBj3V1sDYmkN2QecE59gz3e1gfN3zPtwmQEUe6xvHWK3X3qdH45pGPUtxk1eDTZl45037C0NClWF7RXI4m6UXng4bL9wnPvoVqCI+ySsNWaTkHDLE/D9s/VrqGxJ1w2KiJb1F73g9/x/zjL8Ixb16wkPmLE0e50MQAQa7EMFTyPZoEskFnEviLYXM9pDexABAjJfbfZ39lLyMgVYGwnzEDbjDlm68dE6wQWUY1OV6wbt8uYreB2IRrlb root@hydra"
  ];
}