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

{

  networking = {
    hostName = "lithium";
    hosts = {
      "::1" = [ "localhost" "ipv6-localhost" "ipv6-loopback" ];
    };

    firewall = {
      allowedTCPPorts = [ 8096 22 8000 8443 443 500 10000 8080 8081];
      allowedTCPPortRanges = [
        { from = 3000; to = 3100; } # dev
      ];
      checkReversePath = false;
    };

  };

  time.timeZone = "America/Los_Angeles";

  environment.systemPackages = with pkgs; [
    wget
    vnstat
  ];

  fonts.fonts = with pkgs; [
    google-fonts mononoki source-code-pro fantasque-sans-mono hack-font
    fira fira-code fira-code-symbols
  ];

  nixpkgs = {
    config = {
      allowUnfree = true;
      allowBroken = true;
    };
  };

  hardware = {
    opengl.enable = true;
    pulseaudio = {
      enable = true;
      extraConfig = ''
        load-module module-loopback
      '';
    };
  };

  programs = {
    bash.enableCompletion = true;
    command-not-found.enable = true;
    gnupg.agent = {
      enable = true;
      enableSSHSupport = true;
    };
    mosh.enable = true;
  };

  virtualisation = {
    docker = {
      enable = false;
      liveRestore = false;
    };
    libvirtd.enable = true;
    virtualbox = {
      host = {
        enable = false;
        headless = false;
        addNetworkInterface = false;
      };
      guest = {
        enable = false;
        x11 = false;
      };
    };
  };

  services = {
    pcscd.enable = true;
    logind = {
      lidSwitch = "ignore";
      extraConfig = "IdleAction=ignore";
    };

    openssh = {
      enable = true;
      forwardX11 = true;
    };

    deluge = {
      enable = true;
      openFilesLimit = 10240;
      web.enable = true;
    };

    printing.enable = true;

    xserver = {
      enable = true;
      layout = "us";

      xkbOptions = "caps:ctrl_modifier";

      displayManager.sddm.enable = true;

      desktopManager = {
        kodi.enable = true;
        plasma5.enable = true;
        xterm.enable = true;
      };
    };

    jupyter = {
      enable = false;
      port = 3099;
      ip = "*";
      password = "'sha1:4b14a407cabe:fbab8e5400f3f4f3ffbdb00e996190d6a84bf51e'";
      kernels = {
        python3 = let
          env = (pkgs.python3.withPackages (p: with p; [
            ipykernel pandas scikitlearn numpy matplotlib sympy ipywidgets
          ]));
        in {
          displayName = "py3";
          argv = [
            "${env.interpreter}"
            "-m"
            "ipykernel_launcher"
            "-f"
            "{connection_file}"
          ];
          language = "python";
          #logo32 = "${env.sitePackages}/lib/python3.6/site-packages/ipykernel/resources/logo-32x32.png";
          #logo64 = "${env.sitePackages}/lib/python3.6/site-packages/ipykernel/resources/logo-64x64.png";
        };
      };
    };

    emby = {
      enable = true;
      user = "emby";
    };

    vnstat.enable = true;

    # security stuff
    fail2ban.enable = true;
    clamav = {
      daemon.enable = true;
      updater.enable = true;
    };

    postgresql = {
      enable = true;
      package = pkgs.postgresql_10;
      authentication = ''
        local all pprjam md5
        local all pprjam_test md5
      '';
      enableTCPIP = true;
    };
    redis = {
      enable = true;
    };
  };

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

  boot.initrd.luks.devices = [
    {
      name = "root";
      device = "/dev/disk/by-uuid/a0160f25-e0e3-4af0-8236-3e298eac957a";
      preLVM = true;
    }
  ];

  powerManagement.enable = false;

  nix = {
    gc = {
      automatic = true;
      dates = "03:15";
    };
    binaryCaches =  [ "https://cache.nixos.org/" ];
    nixPath = [
      "nixpkgs=/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs"
      "nixos-config=/etc/nixos/configuration.nix"
      "/nix/var/nix/profiles/per-user/root/channels"
    ];
    extraOptions = ''
      gc-keep-outputs = true
      gc-keep-derivations = true
    '';
  };

  # 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 = "17.09"; # Did you read the comment?
  system.autoUpgrade.enable = true;

}