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

with lib;

let

  tarballVariant = extendModules {
    modules = [{
      boot.consoleLogLevel = lib.mkDefault 7;

      # Allow access to the root account right after installation
      users = {
         mutableUsers = false;
         users.root.password = mkDefault "nixturris";
      };

      # Allow root access over SSH
      services.openssh = {
         enable = true;
         passwordAuthentication = true;
         permitRootLogin = "yes";
      };

      # TODO we have to generate the hardware specific configuration on first boot
      boot.postBootCommands = ''
      '';

      environment.etc."nixos/flake.nix" = {
        mode = "0600";
        text = ''
        {
          inputs.nixpkgs-stable.url = "github:NixOS/nixpkgs/nixos-21.11";
          inputs.nixturris.url = "git+https://git.cynerd.cz/nixturris";
          outputs = { self, nixpkgs-stable, nixturris }: {
            nixosConfigurations.nixturris = nixturris.lib.nixturrisSystem {
              nixpkgs = nixpkgs-stable;
              board = "${config.turris.board}";
              modules = [({ config, lib, pkgs, ... }: {
                # Optionally place your configuration here
              })];
            };
          };
        }
        '';
      };
      system.extraSystemBuilderCmds = ''
      mkdir -p $out/boot/extlinux
      cat >$out/boot/extlinux/extlinux.conf <<EOF
      DEFAULT nixos-default
      TIMEOUT 0
      LABEL nixos-default
        MENU LABEL NixOS - Default
        LINUX /run/current-system/kernel
        FDTDIR /run/current-system/dtbs
        INITRD /run/current-system/initrd
        APPEND init=${config.system.build.toplevel}/init ${builtins.toString config.boot.kernelParams}
      EOF
      '';
    }];
  };

in {

  system.build.tarball = pkgs.callPackage "${modulesPath}/../lib/make-system-tarball.nix" {
    contents = [
      {
        source = "${tarballVariant.config.system.build.toplevel}/.";
        target = "./";
      }
    ];

    storeContents = map (x: { object = x; symlink = "none"; }) [
      tarballVariant.config.system.build.toplevel
      pkgs.stdenv
    ];
  };

}