# This is your system's configuration file.
# Use this to configure your system environment (it replaces /etc/nixos/configuration.nix)
{
  inputs,
  outputs,
  pkgs,
  ...
}: {
  # You can import other NixOS modules here
  imports = [
    # Import home-manager's NixOS module
    inputs.home-manager.nixosModules.home-manager
    outputs.nixosModules.vpn-ip
    # If you want to use modules your own flake exports (from modules/nixos):
    # outputs.nixosModules.example

    # Or modules from other flakes (such as nixos-hardware):
    # inputs.hardware.nixosModules.common-cpu-amd
    # inputs.hardware.nixosModules.common-ssd

    # You can also split up your configuration and import pieces of it here:
    # ./users.nix

    ../../desktop

    ../../../disko/GLaDOS

    # Import your generated (nixos-generate-config) hardware configuration
    ./hardware-configuration.nix
  ];

  environment.systemPackages = with pkgs; [
    gparted
  ];

  services.displayManager.sddm = {
    enable = true;
    wayland.enable = true;
  };

  services.displayManager.defaultSession = "plasma";
  services.desktopManager.plasma6.enable = true;

  services.vpn-ip = {
    ip = "2";
  };

  networking.hostName = "GLaDOS";

  services.xserver.videoDrivers = ["amdgpu"];
  programs = {
    steam = {
      enable = true;
      remotePlay.openFirewall = true; # Open ports in the firewall for Steam Remote Play
      dedicatedServer.openFirewall = true; # Open ports in the firewall for Source Dedicated Server
      extest.enable = true;
    };

    # gamemode.enable = false;
    # gamemode.settings = {
    #   general = {
    #     renice = 10;
    #   };

    #   # Warning: GPU optimisations have the potential to damage hardware
    #   # gpu = {
    #   #   apply_gpu_optimisations = "accept-responsibility";
    #   #   gpu_device = 0;
    #   #   amd_performance_level = "high";
    #   # };

    #   custom = {
    #     start = "${pkgs.libnotify}/bin/notify-send 'GameMode started'";
    #     end = "${pkgs.libnotify}/bin/notify-send 'GameMode ended'";
    #   };
    # };
  };
  boot = {
    # Nuke root AND home subvolumes on every boot
    initrd.systemd.services.wipe-my-fs = {
      requires = ["dev-mapper-nvme_crypted.device"];
      after = ["dev-mapper-nvme_crypted.device"];
      wantedBy = ["initrd.target"];
      script = ''
        mkdir -p /btrfs_tmp
          mount /dev/mapper/cryptroot /btrfs_tmp

          delete_subvolume_recursively() {
              IFS=$'\n'
              for i in $(btrfs subvolume list -o "$1" | cut -f 9- -d ' '); do
                  delete_subvolume_recursively "/btrfs_tmp/$i"
              done
              btrfs subvolume delete "$1"
          }

          # Nuke and recreate root
          delete_subvolume_recursively /btrfs_tmp/root
          btrfs subvolume create /btrfs_tmp/root

          # Nuke and recreate home (wipes /home — but we restore via impermanence)
          delete_subvolume_recursively /btrfs_tmp/home
          btrfs subvolume create /btrfs_tmp/home

          umount /btrfs_tmp
      '';
    };

    loader.systemd-boot.enable = false;
    initrd.systemd.enable = true;
    kernelPackages = pkgs.linuxPackages_latest;
    supportedFilesystems = ["btrfs" "bcachefs"];

    binfmt.emulatedSystems = ["aarch64-linux"];

    lanzaboote = {
      enable = true;
      pkiBundle = "/var/lib/sbctl";
    };
    extraModprobeConfig = ''
    '';
  };

  users.users.lillian.extraGroups = ["gamemode"];

  # https://nixos.wiki/wiki/FAQ/When_do_I_update_stateVersion
  system.stateVersion = "26.05";
}