{ config, lib, options, pkgs, ... }:

with lib;

let
  cfg = config.services.malobeo.microvm;
in
{
  options = {
    services.malobeo.microvm = {
      enableHostBridge = mkOption {
        default = false;
        type = types.bool;
        description = lib.mdDoc "Setup bridge device for microvms.";
      };
    };
  };

  config = mkIf cfg.enableHostBridge
  { 
    systemd.network = {
      enable = true;
      # create a bride device that all the microvms will be connected to
      netdevs."10-microvm".netdevConfig = {
        Kind = "bridge";
        Name = "microvm";
      };

      networks."10-microvm" = {
        matchConfig.Name = "microvm";
        networkConfig = {
          DHCPServer = true;
          IPv6SendRA = true;
        };
        addresses = [ {
          Address = "10.0.0.1/24";
        } {
          Address = "fd12:3456:789a::1/64";
        } ];
        ipv6Prefixes = [ {
          Prefix = "fd12:3456:789a::/64";
        } ];
      };

      # connect the vms to the bridge
      networks."11-microvm" = {
        matchConfig.Name = "vm-*";
        networkConfig.Bridge = "microvm";
      };
    };
  };
}