{ pkgs, lib, config, inputs, ... }:
{
  imports = [
    ./hardware-configuration.nix
  ];

  nixpkgs.config.allowUnfree = true;

  boot = {
    kernelParams =
      [
        "amdgpu.ppfeaturemask=0xffffffff"
        "net.ifnames=0"
      ];

    loader = {
      efi = {
        canTouchEfiVariables = true;
        efiSysMountPoint = "/boot/efi";
      };

      grub = {
        enable = true;
        useOSProber = true;
        efiSupport = true;
        device = "nodev";
      };

      grub2-theme = {
        enable = true;
        theme = "stylish";
        screen = "2k";
      };
    };

    kernelPackages = pkgs.linuxPackages_latest;
    kernelModules = [ "i2c-dev" "i2c-piix4" ];
  };

  powerManagement.cpuFreqGovernor = "schedutil";

  networking = {
    hostName = "terra"; # Define your hostname.
    networkmanager.enable = true;
    firewall.enable = false;
    extraHosts = ''
      192.168.0.18 steam.deck
    '';
  };

  # Set your time zone.
  time.timeZone = "Europe/Vienna";

  # Select internationalisation properties.
  i18n = {
    defaultLocale = "en_US.UTF-8";
    extraLocaleSettings = {
      LC_NUMERIC = "de_AT.UTF-8";
      LC_TIME = "de_AT.UTF-8";
      LC_MONETARY = "de_AT.UTF-8";
      LC_MEASUREMENT = "de_AT.UTF-8";
      LC_IDENTIFICATION = "de_AT.UTF-8";
    };
  };

  console = {
    font = "Lat2-Terminus16";
    keyMap = "us-acentos";
  };

  hardware.opengl = {
    enable = true;
    extraPackages = [ pkgs.libvdpau-va-gl ];

    driSupport32Bit = true;
  };

  hardware.steam-hardware.enable = true;
  programs.steam.enable = true;
  chaotic.steam.extraCompatPackages = with pkgs; [ luxtorpeda proton-ge-custom ];

  hardware.bluetooth.enable = true;
  hardware.sane = {
    enable = true;
    extraBackends = [ pkgs.sane-airscan ];
  };

  # Enable sound.
  sound.enable = true;

  security = {
    audit.enable = false;
    auditd.enable = false;
    polkit.enable = true;
    rtkit.enable = true;
    sudo.enable = false;

    doas = {
      enable = true;
      extraRules = [{
        users = [ "manuel" ];
        keepEnv = true;
        persist = true;
      }];
    };
  };

  users.users.manuel = {
    isNormalUser = true;
    extraGroups = [ "audio" "games" "input" "lp" "networkmanager" "scanner" "users" "vboxusers" "video" "wheel" ];
    shell = pkgs.fish;
  };

  environment = {
    systemPackages = with pkgs; [
      bc
      cached-nix-shell
      compsize
      distrobox
      fd
      file
      git
      htop
      kdiskmark
      links2
      libsForQt5.dolphin
      libsForQt5.kio-extras
      lm_sensors
      nvtop-amd
      openrgb
      p7zip
      pciutils
      ripgrep
      unrar
      unzip
      usbutils
      ydotool
    ];
  };

  programs = {
    dconf.enable = true;
    hyprland.enable = true;
    fish.enable = true;
    kdeconnect.enable = true;
    ssh.startAgent = true;
  };

  services = {
    blueman.enable = true;
    flatpak.enable = true;
    fwupd.enable = true;
    gnome.gnome-keyring.enable = true;
    gvfs.enable = true;
    openssh.enable = true;
    udisks2.enable = true;

    udev = {
      packages = [ pkgs.openrgb ];
    };

    printing = {
      enable = true;
      drivers = [ pkgs.cnijfilter2 ];
    };

    avahi = {
      enable = true;
      nssmdns = true;
    };

    mullvad-vpn = {
      enable = true;
      package = pkgs.mullvad-vpn;
    };

    pipewire = {
      enable = true;
      alsa.enable = true;
      alsa.support32Bit = true;
      pulse.enable = true;
    };

    locate = {
      enable = true;
      locate = pkgs.plocate;
      localuser = null;
      prunePaths = lib.mkOptionDefault [ ];
      interval = "hourly";
    };

    fstrim = {
      enable = true;
      interval = "weekly";
    };

    greetd = {
      enable = true;
      settings = {
        default_session = {
          command = "${pkgs.greetd.tuigreet}/bin/tuigreet --time --cmd Hyprland";
          user = "greeter";
        };
      };
    };
  };

  virtualisation = {
    podman.enable = true;
  };

  xdg.portal = {
    enable = true;
    xdgOpenUsePortal = true;
    wlr.enable = false; #conflict with XDPH if enabled
    extraPortals = [
      pkgs.xdg-desktop-portal-gtk
    ];
  };

  systemd.extraConfig = ''
    DefaultTimeoutStopSec=10s
  '';

  systemd.user.extraConfig = ''
    # needed for xdg-open to find the default browser. Why the fuck do I even need to do that?
    DefaultEnvironment="PATH=/etc/profiles/per-user/manuel/bin:/run/current/system/sw/bin"

    #Systemd is a meme. This is the proof
    DefaultTimeoutStopSec=10s
  '';

  nix = {
    extraOptions = ''
      experimental-features = nix-command flakes
      warn-dirty = false
    '';

      registry = lib.mapAttrs (_: value: { flake = value; }) inputs;
      nixPath = lib.mapAttrsToList (key: value: "${key}=${value.to.path}") config.nix.registry;

    gc = {
      persistent = true;
      automatic = true;
      dates = "weekly";
      options = "--delete-older-than 7d";
    };

    settings = {
      auto-optimise-store = true;

      substituters = [
        "https://nyx.chaotic.cx"
        "https://hyprland.cachix.org"
      ];

      trusted-public-keys = [
        "nyx.chaotic.cx-1:HfnXSw4pj95iI/n17rIDy40agHj12WfF+Gqk6SonIT8="
        "chaotic-nyx.cachix.org-1:HfnXSw4pj95iI/n17rIDy40agHj12WfF+Gqk6SonIT8="
        "hyprland.cachix.org-1:a7pgxzMz7+chwVL3/pzj6jIBMioiJM7ypFP8PwtkuGc="
      ];
    };
  };

  system.stateVersion = "23.05";
}