nixos/applications/dns.nix

{ lib, pkgs, config, ... }:
let
  cfg = config.skynet_dns;
in {
  options = {
    skynet_dns = {
      enable = lib.mkEnableOption {
        default = false;
        example = true;
        description = "Skynet DNS";
        type = lib.types.bool;
      };

      records = {
        external = lib.mkOption {
          default = [ ];
          type = lib.types.listOf lib.types.str;
          description = ''
            External records like: agentjones      A       193.1.99.72
          '';
        };

        cname = lib.mkOption {
          default = [ ];
          type = lib.types.listOf lib.types.str;
          description = ''
            External records like: ns1             CNAME   ns1
          '';
        };
      };

    };
  };


  config = lib.mkIf cfg.enable {
    services.bind = {
        enable = true;

        forwarders = [
          # these were in old config file
          "193.1.100.130"
          "193.1.100.131"
        ];

        /*
        put any other zones above skynet and link to their files like so:

          example.ie = {
            extraConfig = "";
            file = ./dns/example;
            master = true;
            masters = [];
            slaves = [ ];
          };

        Skynet is handled a bit more dynamically since it is the key one we should focus on
        */

        skynet.ie = {
          extraConfig = "";
          # really wish teh nixos config didnt use master/slave
          master = true;
          masters = [ ];
          slaves = [ ];

          file = ''
          $TTL 60  ; 1 minute
          ; hostmaster@skynet.ie is an email address that recieves stuff related to dns
          @   IN SOA  ns1.skynet.ie. hostmaster.skynet.ie. (
                2023011701 ; Serial (YYYYMMDDCC)
                600        ; Refresh (10 minutes)
                300        ; Retry (5 minutes)
                2419200    ; Expire (4 weeks)
                3600       ; Minimum (1 hour)
              )
              NS  ns1.skynet.ie.
              NS  ns2.skynet.ie.
              ; @ stands for teh root domain so teh A record below is where skynet.ie points to
              A   193.1.99.76
              MX  5 mail.skynet.ie.

              ; can have multiple mailserves
              ;MX  20 mail2.skynet.ie.


          ; ------------------------------------------
          ; Server Names
          ; ------------------------------------------

          ; External addresses
          ; ------------------------------------------
          ${lib.strings.concatMapStrings (x: x + "\n") cfg.records.external}


          ; this is fixed for now
          wintermute      A       193.1.101.148


          ; internal addresses
          ; ------------------------------------------
          ; May come back to this idea in teh future
          ; agentjones.int  A       172.20.20.1


          ; cname's
          ; ------------------------------------------
          ${lib.strings.concatMapStrings (x: x + "\n") cfg.records.cname}

          '';
        };
      };

    };



}