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

# usual environment, as a thin OS

let
  nixpkgs = builtins.fetchTarball (import ../nixpkgs.nix);
in {
  imports = [ ./users.nix ];

  security.sudo.wheelNeedsPassword = false;

  boot.initrd.availableKernelModules = [
    "ehci_pci" "ahci"
    "usb_storage" "sd_mod"
  ];
  boot.kernelModules = [ "kvm-intel" ];
  boot.extraModulePackages = [];

  fileSystems."/boot".device = "/dev/disk/by-label/boot";
  fileSystems."/boot".fsType = "vfat";

  fileSystems."/".device = "/dev/disk/by-label/nixos";
  fileSystems."/".fsType = "ext4";

  swapDevices = [
    { device = "/dev/disk/by-label/swap"; }
  ];

  networking.hostName = "helium";
  networking.networkmanager.enable = true;

  time.timeZone = "America/New_York";

  location.latitude = 40.80;
  location.longitude = -81.52;

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

  environment.systemPackages = [
  ];

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

  hardware.enableAllFirmware = true;
  hardware.bluetooth.enable = true;
  hardware.bluetooth.package = pkgs.bluezFull;
  # hardware.acpilight.enable = true;
  hardware.brillo.enable = true;
  hardware.opengl.enable = true;
  hardware.pulseaudio = {
      enable = true;
      extraConfig = ''
        load-module module-loopback
      '';
    };

  sound.enable = true;
  sound.mediaKeys.enable = true;

  programs = {
    bash.enableCompletion = true;
    command-not-found.enable = true;
    light.enable = true;
    gnupg.agent = {
      enable = true;
      enableSSHSupport = true;
    };
    mosh.enable = true;
    ssh.agentTimeout = "1h";
  };

  services = {
    pcscd.enable = true;

    logind.lidSwitch = "suspend";
    logind.extraConfig = "IdleAction=lock";

    clight.enable = true;
    clight.temperature.day = 5000;
    clight.temperature.night = 2300;

    printing.enable = true;

    xserver.enable = true;
    xserver.autorun = true;
    xserver.layout = "us";
    xserver.libinput.enable = true;
    xserver.xkbOptions = "caps:ctrl_modifier";

    xserver.displayManager.sddm.enable = true;
    xserver.windowManager.xmonad.enable = true;
    xserver.desktopManager.xterm.enable = true;

    xserver.xautolock.enable = true;
    xserver.xautolock.enableNotifier = true;
    xserver.xautolock.notifier = "${pkgs.libnotify}/bin/notify-send 'locking in 10 seconds'";
    xserver.xautolock.nowlocker = "${pkgs.i3lock}/bin/i3lock --color=000000 --show-failed-attempts --ignore-empty-password";
    xserver.xautolock.locker = "${pkgs.i3lock}/bin/i3lock --color=000000 --show-failed-attempts --ignore-empty-password";

    vnstat.enable = true;

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

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

  powerManagement.enable = true;
  powerManagement.cpuFreqGovernor = lib.mkDefault "powersave";

  nix.nixPath = [
      "nixpkgs=${nixpkgs}"
      "nixos-config=/etc/nixos/configuration.nix"
      "/nix/var/nix/profiles/per-user/root/channels"
    ];

  nix.gc.automatic = false;
  nix.gc.dates = "03:15";
  nix.binaryCaches =  [ "https://cache.nixos.org/" ];
  nix.extraOptions = ''
    builders-use-substitutes = true
  '';

  nix.maxJobs = lib.mkDefault 4;
  nix.buildMachines = [
      {
        hostName = "dev.simatime.com";
        sshUser = "ben";
        sshKey = "/home/ben/.ssh/id_rsa";
        system = "x86_64-linux";
      }
    ];
  nix.distributedBuilds = true;
  nix.trustedUsers = [ "root" "ben" ];

  # 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 = "19.03"; # Did you read the comment?
  system.autoUpgrade.enable = true;

}