# Edit this configuration file to define what should be installed on
# your system.  Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running ‘nixos-help’).

{ config, pkgs, ... }:
let mosquittoPort = 1883;
in
{
  imports = [ ];

  # This value determines the NixOS release from which the default
  # settings for stateful data, like file locations and database versions
  # on your system were taken. It‘s perfectly fine and recommended to leave
  # this value at the release version of the first install of this system.
  # Before changing this value read the documentation for this option
  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
  system.stateVersion = "21.05"; # Did you read the comment?

  # Additional packages
  environment.systemPackages = with pkgs; [ ];

  services.mosquitto = {
    enable = true;
    listeners = [{
      port = mosquittoPort;
      settings.allow_anonymous = true;
      acl = [ "topic readwrite #" ];
      users = {
        victor = { acl = [ "readwrite #" ]; };
        zigbee2mqtt = { acl = [ "readwrite #" ]; };
      };
    }];

  };

  services.zigbee2mqtt = {
    enable = true;
    dataDir = "/var/lib/zigbee2mqtt";
    settings = {
      homeassistant = true;
      permit_join = false;

      serial = { port = "/dev/ttyUSB0"; };

      mqtt = {
        base_topic = "zigbee2mqtt";
        server = "mqtt://localhost:${toString mosquittoPort}";
        user = "zigbee2mqtt";
      };

      frontend = { port = 8080; };
    };
  };

  networking.firewall.allowedTCPPorts =
    [ mosquittoPort config.services.zigbee2mqtt.settings.frontend.port ];
}