# Edit this configuration file to define what should be installed on
# your system.  Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running ‘nixos-help’).

{ config, pkgs, ... }:

let
  impermanence = builtins.fetchTarball {
    url = "https://github.com/nix-community/impermanence/archive/master.tar.gz";
  };
  home-manager = builtins.fetchTarball {
    url =
      "https://github.com/nix-community/home-manager/archive/release-21.11.tar.gz";
  };
in {
  imports = [ # Include the results of the hardware scan.
    ./nixos/hardware-configuration/trantor.nix
    ./nixos/common.nix
    "${home-manager}/nixos"
    "${impermanence}/nixos.nix"
  ];

  home-manager.users.rilla = import home/trantor.nix;

  fileSystems = {
    "/" = {
      device = "tmpfs";
      fsType = "tmpfs";
      options = [ "defaults" "size=2G" "mode=755" ];
    };

    "/persist/system" = {
      device = "/dev/mapper/system";
      fsType = "btrfs";
      options = [ "subvol=persist" "compress=zstd" ];
      neededForBoot = true;
    };

    "/persist/user" = {
      device = "/dev/mapper/user";
      fsType = "btrfs";
      options = [ "subvol=persist" "compress=zstd" ];
      neededForBoot = true;
    };

    "/nix" = {
      device = "/dev/mapper/system";
      fsType = "btrfs";
      options = [ "subvol=nix" "compress=zstd" ];
    };

    "/boot" = {
      device = "/dev/mapper/system";
      fsType = "btrfs";
      options = [ "subvol=boot" "compress=zstd" ];
    };

    "/boot/efi" = {
      device = "/dev/disk/by-uuid/0BFA-9A66";
      fsType = "vfat";
    };

    "/swap" = {
      device = "/dev/mapper/system";
      fsType = "btrfs";
      options = [ "subvol=swap" ];
    };

    "/home/rilla/music" = {
      device = "narwhal:/music";
      fsType = "nfs";
      options = [
        "nfsvers=4"
        "x-systemd.automount"
        "x-systemd.idle-timeout=1min"
      ];
    };

    # "/home/rilla/calibre" = {
    #   device = "narwhal:/calibre";
    #   fsType = "nfs";
    #   options = [
    #     "nfsvers=4"
    #     "noauto"
    #     "x-systemd.automount"
    #     "x-systemd.idle-timeout=1min"
    #   ];
    # };
  };

  swapDevices = [{ device = "/swap/swapfile"; }];

  environment.persistence = {
    "/persist/system" = {
      directories = [
        "/var/log"
        "/var/lib/bluetooth"
        "/var/lib/systemd/coredump"
        "/var/lib/docker"
      ];
      files = [
        "/etc/machine-id"
        "/etc/ssh/ssh_host_ed25519_key"
        "/etc/ssh/ssh_host_ed25519_key.pub"
        "/etc/ssh/ssh_host_rsa_key"
        "/etc/ssh/ssh_host_rsa_key.pub"
        # "/etc/wireguard/wg0"
      ];
    };
    "/persist/user" = {
      directories =
        [ "/etc/NetworkManager/system-connections" "/var/lib/libvirt" ];
    };
  };

  environment.variables.NIXOS_CONFIG =
    "/home/rilla/configs/nix-config/trantor.nix";

  networking.networkmanager.wifi.macAddress = "80:FA:5B:41:12:0F";

  nixpkgs.config.allowUnfree = true;
  programs.steam.enable = true;

  boot = {
    loader = {
      systemd-boot.enable = true;
      efi = {
        canTouchEfiVariables = true;
        efiSysMountPoint = "/boot/efi";
      };
      grub = {
        enable = true;
        version = 2;
        device = "nodev";
        enableCryptodisk = true;
        efiSupport = true;
      };
    };
    initrd = {
      luks.devices = {
        "system" = {
          device = "/dev/disk/by-uuid/b9778e01-a86c-4c6b-beb3-f97888d4a6eb";
          keyFile = "/system_keyfile.bin";
        };
        "user" = {
          device = "/dev/disk/by-uuid/d8e9b35d-704a-4f66-bc19-0dd3e158de36";
          keyFile = "/user_keyfile.bin";
        };
      };
      secrets = {
        "/system_keyfile.bin" = "/boot/system_keyfile.bin";
        "/user_keyfile.bin" = "/boot/user_keyfile.bin";
      };
    };
  };

  networking = {
    hostName = "trantor";
    interfaces = {
      enp3s0f1.useDHCP = true;
      wlp4s0.useDHCP = true;
    };
  };

  services.xserver = { videoDrivers = [ "nvidia" ]; };
  hardware.nvidia = {
    nvidiaPersistenced = true;
    modesetting.enable = true;
    prime = {
      sync.enable = true;
      nvidiaBusId = "PCI:1:0:0";
      intelBusId = "PCI:0:2:0";
    };
  };

  # This value determines the NixOS release from which the default
  # settings for stateful data, like file locations and database versions
  # on your system were taken. It‘s perfectly fine and recommended to leave
  # this value at the release version of the first install of this system.
  # Before changing this value read the documentation for this option
  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
  system.stateVersion = "21.05"; # Did you read the comment?
}