{ depot, lib, pkgs, rebuilder, ... }:
{ config, ... }:
let
  inherit (depot.ops) secrets;
in {
  boot.initrd.availableKernelModules = [
    "xhci_pci"
    "ahci"
    "nvme"
    "usbhid"
    "usb_storage"
    "sd_mod"
    "sr_mod"
  ];
  boot.kernelModules = [ "kvm-intel" "tcp_bbr" ];
  boot.kernel.sysctl = {
    "net.ipv6.conf.default.accept_ra" = 0;
    "net.ipv6.conf.all.accept_ra" = 0;
    "net.ipv6.conf.default.autoconf" = 0;
    "net.ipv6.conf.all.autoconf" = 0;
  };
  boot.supportedFilesystems = [ "zfs" ];
  boot.zfs.devNodes = "/dev/disk/by-partuuid";
  services.zfs.autoScrub.enable = true;
  services.zfs.autoSnapshot = {
    enable = true;
    monthly = 1;
  };

  boot.initrd.postDeviceCommands = lib.mkAfter ''
    zfs rollback -r zfast/local/root@blank
  '';

  powerManagement.cpuFreqGovernor = lib.mkDefault "performance";

  fileSystems = let
    zfs = device: {
      device = device;
      fsType = "zfs";
    };
  in {
    "/" = zfs "zfast/local/root";
    "/nix" = zfs "zfast/local/nix";
    "/persist" = zfs "zfast/safe/persist";
    "/home" = zfs "zfast/safe/home";
    "/store" = zfs "zslow/local/store";

    "/boot" = {
      device = "/dev/disk/by-label/ESP";
      fsType = "vfat";
    };
  };

  nix.maxJobs = lib.mkDefault 12;
  hardware.enableRedistributableFirmware = true;

  nixpkgs.config = { allowUnfree = true; };

  nix.nixPath = [ "depot=/home/lukegb/depot/" "nixpkgs=/home/lukegb/depot/third_party/nixpkgs/" ];

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

  # Networking!
  networking = {
    hostName = "clouvider-fra01";
    domain = "as205479.net";
    hostId = "9e983570";

    nameservers = [
      "2001:4860:4860::8888"
      "2001:4860:4860::8844"
      "8.8.8.8"
      "8.8.4.4"
    ];
    useDHCP = false;
    defaultGateway = {
      address = "193.228.196.56";
      interface = "enp1s0";
    };
    defaultGateway6 = {
      address = "2a0f:93c0:0:22::1";
      interface = "enp1s0";
    };
    interfaces.enp1s0 = {
      useDHCP = false;
      ipv4.addresses = [{ address = "193.228.196.57"; prefixLength = 31; }];
      ipv6.addresses = [{ address = "2a0f:93c0:0:22::2"; prefixLength = 126; }];
    };
    firewall.allowPing = true;
  };

  # Select internationalisation properties.
  i18n.defaultLocale = "en_GB.UTF-8";
  console.keyMap = "us";

  # Set your time zone.
  time.timeZone = "Etc/UTC";

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

  programs.mtr.enable = true;
  services.openssh.enable = true;

  # Define a user account.
  users.mutableUsers = false;
  users.users = {
    root.hashedPassword = secrets.passwordHashes.root;
    lukegb = {
      isNormalUser = true;
      uid = 1000;
      extraGroups = [ "wheel" "content" ];
      hashedPassword = secrets.passwordHashes.root;
    };
    content = {
      isSystemUser = true;
      extraGroups = [ "content" ];
    };
  };
  users.groups = {
    content = {};
  };

  boot.kernel.sysctl."net.ipv4.tcp_congestion_control" = "bbr";
  boot.kernel.sysctl."net.core.default_qdisc" = "fq_codel";

  services.openssh.hostKeys = [
    {
      path = "/persist/etc/ssh/ssh_host_ed25519_key";
      type = "ed25519";
    }
    {
      path = "/persist/etc/ssh/ssh_host_rsa_key";
      type = "rsa";
      bits = 4096;
    }
  ];

  services.plex = {
    enable = true;
    dataDir = "/store/plex";
    openFirewall = true;
    package = depot.nix.pkgs.plex-pass;
  };

  system.stateVersion = "20.03";
}