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

{
  imports = [
    (modulesPath + "/installer/scan/not-detected.nix")
    ./common.nix
    ./kde.nix
    #./95theme.nix
    #./gnome.nix
    #./fdn-vpn.nix
  ];

  networking.hostName = "lindy";
  networking.hostId = "b8149765";

  # Driver config
  boot.initrd.availableKernelModules = [ "xhci_pci" "ehci_pci" "ahci" "nvme" "usb_storage" "usbhid" "sd_mod" ];
  boot.initrd.kernelModules = [ "dm-snapshot" ];
  boot.kernelModules = [ "kvm-intel" "wl" ];
  boot.extraModulePackages = [ config.boot.kernelPackages.broadcom_sta ];

  # ZFS config
  boot.kernelPackages = config.boot.zfs.package.latestCompatibleLinuxPackages;
  boot.supportedFilesystems = [ "zfs" ];
  boot.zfs.devNodes = "/dev/mapper";
  boot.zfs.extraPools = [ "Zonz" ];
  services.zfs.autoScrub.enable = true;
  services.zfs.autoScrub.pools = [ "Zonz" ];
  services.zfs.autoScrub.interval = "quarterly";

  # Use Grub
  boot.loader.grub.enable = true;
  boot.loader.grub.efiSupport = true;
  boot.loader.grub.device = "nodev";
  boot.loader.grub.extraGrubInstallArgs = [ "--bootloader-id=NixOS" ];
  boot.loader.efi.efiSysMountPoint = "/boot/efi";
  boot.loader.efi.canTouchEfiVariables = true;

  boot.initrd.luks.devices = {
    cryptssd = {
      device = "/dev/disk/by-uuid/a5aad0b3-fb8c-4711-80db-d8fdcc832f83";
      allowDiscards = true;
    };
  };

  fileSystems."/" =
    { device = "none";
      fsType = "tmpfs";
      options = [ "defaults" "size=6G" "mode=755" ];
    };

  fileSystems."/var" =
    { device = "lindy/nixos/var";
      fsType = "zfs";
    };

  fileSystems."/home" =
    { device = "lindy/home";
      fsType = "zfs";
      neededForBoot = true; # because contains password files used below
    };

  fileSystems."/nix" =
    { device = "lindy/nixos/nix";
      fsType = "zfs";
    };

  fileSystems."/boot" =
    { device = "/dev/disk/by-uuid/b9f80731-ac5a-476e-9454-32fef4ebc40f";
      fsType = "ext4";
      options = [ "discard" ];
    };

  fileSystems."/boot/efi" =
    { device = "/dev/disk/by-uuid/02D0-F1C6";
      fsType = "vfat";
    };

  fileSystems."/root" =     # /root contains the Borg cache for the backup script
    { device = "/nix/persist/root";
      fsType = "none";
      options = [ "bind" ];
    };

  fileSystems."/etc/NetworkManager/system-connections" =
    { device = "/nix/persist/etc/NetworkManager/system-connections";
      fsType = "none";
      options = [ "bind" ];
    };

  environment.etc."machine-id".source = "/nix/persist/etc/machine-id";

  environment.etc."ssh/ssh_host_rsa_key".source = "/nix/persist/etc/ssh/ssh_host_rsa_key";
  environment.etc."ssh/ssh_host_rsa_key.pub".source = "/nix/persist/etc/ssh/ssh_host_rsa_key.pub";
  environment.etc."ssh/ssh_host_ed25519_key".source = "/nix/persist/etc/ssh/ssh_host_ed25519_key";
  environment.etc."ssh/ssh_host_ed25519_key.pub".source = "/nix/persist/etc/ssh/ssh_host_ed25519_key.pub";

  # ---- zonz (encrypted zfs) ----

  environment.etc.crypttab = {
    enable = true;
    text = ''
Kogami UUID=61534c91-df18-4c71-9244-54e677f5d4fa /nix/persist/root/kogami_key
Komaru UUID=caf8496f-006b-4762-bb20-506d4c7bdb51 /nix/persist/root/komaru_key
    '';
  };

  # ---- immutable user config ----

  users.mutableUsers = false;
  users.users.lx.passwordFile = "/home/lx/.password";
  users.users.lx.uid = 1000;

  # ----

  # Zram
  zramSwap.enable = true;

  # Backup
  services.cron.enable = true;
  services.cron.systemCronJobs = [ "0 20 * * * root /media/Zonz/lindy/do-backup.sh" ];

  # Graphics
  specialisation = {
    nvidia.configuration = {
      boot.kernelParams = [ "i915.modeset=0" ];
      hardware.nvidia.modesetting.enable = true;
      services.xserver.videoDrivers = [ "nvidia" ];
    };
    intelVfio.configuration = {
      boot.blacklistedKernelModules = [ "nouveau" "nvidia" "nvidia_modeset" "nvidia_uvm" "nvidia_drm" ];
      boot.kernelParams = [ "intel_iommu=on" "iommu=pt" "vfio-pci.ids=10de:17c2,10de:0fb0,8086:0c01" ];
      boot.initrd.availableKernelModules = [ "vfio_pci" "vfio" "vfio_iommu_type1" ];
      services.xserver.videoDrivers = [ "modesetting" ];
      systemd.tmpfiles.rules = [
        "f	/dev/shm/looking-glass	0660	lx	kvm	-"
      ];
      environment.systemPackages = with pkgs; [
        looking-glass-client
      ];
    };
  };
  hardware.opengl.enable = true;

  # Docker, VirtualBox
  virtualisation.docker.enable = true;
  virtualisation.virtualbox.host.enable = true;
  users.users.lx.extraGroups = [ "docker" "vboxusers" ];

  # Making dev work available outside
  networking.firewall.allowedTCPPorts = [
    # 8910 8920 # web dev
    4317 4318 # jaeger container
  ];
  networking.firewall.allowedUDPPorts = [
    4010 # scream
  ];

  # GnuPG agent at system level, if at home level conflicts with arch
  programs.gnupg.agent = {
    enable = true;
    enableSSHSupport = false;
  };

  environment.systemPackages = with pkgs; [ zfs docker-compose ];

  nix.gc.automatic = false;

  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
  powerManagement.cpuFreqGovernor = lib.mkDefault "ondemand";
  hardware.cpu.intel.updateMicrocode =
    lib.mkDefault config.hardware.enableRedistributableFirmware;
}