let
  nixpkgs-tar = builtins.fetchTarball (import ./nixpkgs.nix);
  nixpkgs = import "${nixpkgs-tar}" {};
  nixos = import "${nixpkgs-tar}/nixos";
  # TODO(bsima): buildNixOS should be split into multiple functions that each
  # return one thing, instead of a single function that returns multiple things
  buildNixOS = opts: let full = (nixos opts); in {
    system = full.system;
    vm = full.vm;
  };
  buildHaskellApp = import ./com/simatime/buildHaskellApp.nix nixpkgs;
  nixos-mailserver = builtins.fetchTarball {
    url = "https://gitlab.com/simple-nixos-mailserver/nixos-mailserver/-/archive/v2.2.1/nixos-mailserver-v2.2.1.tar.gz";
    sha256 = "03d49v8qnid9g9rha0wg2z6vic06mhp0b049s3whccn1axvs2zzx";
  };
in {
  com.simatime = buildNixOS {
    system = "x86_64-linux";
    configuration = {
      imports = [
        ./com/simatime/hardware.nix
        ./com/simatime/networking.nix
        # common infra
        ./com/simatime/users.nix
        ./com/simatime/packages.nix
        # configured modules
        ./com/simatime/git.nix
        ./com/simatime/mail.nix
        ./com/simatime/web.nix
        ./com/simatime/znc.nix
        # third party
        nixos-mailserver
      ];
      # TODO(bsima): move more stuff here to a common module
      nixpkgs.config.allowUnfree = true;
      programs.mosh = {
        enable = true;
        withUtempter = true;
      };
      services.openssh = {
        enable = true;
        passwordAuthentication = false;
      };
      security.sudo.wheelNeedsPassword = true;
      boot.cleanTmpDir = true;
    };
  } // {
    dev = buildNixOS {
      system = "x86_64-linux";
      configuration = {
        imports = [
          ./com/simatime/users.nix
          ./com/simatime/packages.nix
          ./com/simatime/dev/hardware.nix
          ./com/simatime/dev/configuration.nix
        ];
      };
    };
  };
  com.influencedbybooks = buildNixOS  {
    system = "x86_64-linux";
    configuration = {
      imports = [
        ./com/influencedbybooks/service.nix
        # common infra
        ./com/simatime/users.nix
        ./com/simatime/packages.nix
      ];
      nixpkgs.config.allowUnfree = true;
      services.openssh = {
        enable = true;
        passwordAuthentication = false;
      };
      security.sudo.wheelNeedsPassword = true;
      boot.cleanTmpDir = true;
    };
  } // {
    ibb = buildHaskellApp {
      name = "Com.Influencedbybooks";
      apex = "Com.Influencedbybooks.Apex";
      aero = "Com.Influencedbybooks.Aero";
      deps = {
        both = [
          "clay"
          "miso"
          "protolude"
          "servant"
          "text"
        ];
        apex = [
          "MonadRandom"
          "acid-state"
          "blaze-html"
          "blaze-markup"
          "bytestring"
          "ixset"
          "random"
          "safecopy"
          "scotty"
          "servant-server"
          "text"
        ];
        aero = [
          "aeson"
          "containers"
          "ghcjs-base"
        ];
      };
    };
  };
}