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

{
  imports =
    [ <nixpkgs/nixos/modules/profiles/minimal.nix>
    ];
  nix.useSandbox = false;
  nix.maxJobs = lib.mkDefault 2;
  nix.buildCores = lib.mkDefault 16;

  boot.isContainer = true;
  # /sbin/init
  boot.loader.initScript.enable = true;
  boot.loader.grub.enable = false;

  fileSystems."/" = { fsType = "rootfs"; device = "rootfs"; };

  networking.hostName = "grafana";
  networking.useNetworkd = true;
  networking.defaultGateway = "172.22.99.4";

  # Set your time zone.
  time.timeZone = "Europe/Berlin";
  # Select internationalisation properties.
  i18n = {
    defaultLocale = "en_US.UTF-8";
    supportedLocales = lib.mkForce [ "en_US.UTF-8/UTF-8" ];
  };

  # List packages installed in system profile. To search, run:
  # $ nix search wget
  environment.systemPackages = with pkgs; [
    vim
  ];

  # Create a few files early before packing tarball for Proxmox
  # architecture/OS detection.
  system.extraSystemBuilderCmds = 
      ''
          mkdir -m 0755 -p $out/bin
          ln -s ${pkgs.bash}/bin/bash $out/bin/sh
          mkdir -m 0755 -p $out/sbin
          ln -s ../init $out/sbin/init
      '';


  # http https
  networking.firewall.allowedTCPPorts = [ 80 443 ];
  # collectd
  networking.firewall.allowedUDPPorts = [ 25826 ];

  services.caddy = {
    enable = true;
    agree = true;
    config = ''
        grafana.hq.c3d2.de
        proxy / localhost:3000
    '';
  };
  services.grafana = {
    enable = true;
    auth.anonymous = {
      enable = true;
      org_name = "Chaos";
    };
    users.allowSignUp = true;
  };
  services.influxdb =
    let
      collectdTypes = pkgs.stdenv.mkDerivation {
        name = "collectd-types";
        src = ./.;
        buildInputs = [ pkgs.collectd ];
        buildPhase = ''
            mkdir -p $out/share/collectd
            cat ${pkgs.collectd}/share/collectd/types.db >> $out/share/collectd/types.db
            echo "stations  value:GAUGE:0:U" >> $out/share/collectd/types.db
        '';
        installPhase = ''
            cp -r . $out
        '';
      };
    in {
      enable = true;
      extraConfig = {
        logging.level = "debug";
        collectd = [{
          enabled = true;
          database = "collectd";
          typesdb = "${collectdTypes}/share/collectd/types.db";
        }];
      };    
    };

  # This value determines the NixOS release with which your system is to be
  # compatible, in order to avoid breaking some software such as database
  # servers. You should change this only after NixOS release notes say you
  # should.
  system.stateVersion = "18.09"; # Did you read the comment?
}