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

let
  service = "home-assistant";
  cfg = config.modules.services.${service};
  sec = config.sops.secrets;
  homelab = config.modules.homelab;
in
{
  options.modules.services.${service} = {
    enable = lib.mkEnableOption "enables ${service}";

    # set port options
    port = lib.mkOption {
      type = lib.types.int;
      default = 7704;
      description = "set port for ${service} (default: ${toString cfg.port}";
    };
    url = lib.mkOption {
      type = lib.types.str;
      default = "hass.${homelab.base_domain}";
      description = "set domain for ${service}";
    };
    data_dir = lib.mkOption {
      type = lib.types.str;
      default = "/var/lib/${service}";
      description = "set data directory for ${service}";
    };
    ids = lib.mkOption {
      type = lib.types.int;
      default = cfg.port;
      description = "set uid and pid of ${service} user (matches port by default)";
    };
    backup = lib.mkOption {
      type = lib.types.bool;
      default = true;
      description = "enable backups for ${service}";
    };
  };

  config = lib.mkIf cfg.enable {
    
    # declare ${service} group
    users.groups.${service} = { gid = lib.mkForce cfg.ids; };

    # declare ${service} user
    users.users.${service} = {
      description = "${service} server user";
      uid = lib.mkForce cfg.ids;
      isSystemUser = true;
      home = cfg.data_dir;
      createHome = true;
      group = "${service}";
      extraGroups = [ "bluetooth" ];
    };

    # enable the ${service} service
    services.${service} = {
      enable = true;
      package = inputs.nixpkgs-unstable.legacyPackages.${pkgs.system}.home-assistant;
      extraComponents = [
        # required for onboarding
        "analytics"
        "google_translate"
        "met"
        "radio_browser"
        "shopping_list"
        # zlib
        "isal"
      ];
      # imperative config
#      config = null;
#      lovelaceConfig = null;
#      configDir = cfg.data_dir;
      # declartive poggers!
      config = {
        # Includes dependencies for a basic setup
        default_config = {};
      };
    };


    # override umask to make permissions work out
    systemd.services.${service}.serviceConfig = {
      UMask = lib.mkForce "0007";
      User = lib.mkForce "${service}";
      Group = lib.mkForce "${service}";
    };

#    # open firewall
    networking.firewall.allowedTCPPorts = [ cfg.port 8123 ];

    # internal reverse proxy entry
    services.nginx.virtualHosts."${cfg.url}" = {
      forceSSL = true;
      sslCertificate = sec."ssl_blakedheld_crt".path;
      sslCertificateKey = sec."ssl_blakedheld_key".path;
      locations."/" = {
        proxyPass = "http://127.0.0.1:${toString cfg.port}";
      };
    };
     # external reverse proxy entry
     services.nginx.virtualHosts."hass.blakedheld.xyz" = {
      forceSSL = true;
      sslCertificate = sec."ssl_blakedheld_crt".path;
      sslCertificateKey = sec."ssl_blakedheld_key".path;
      locations."/" = {
        proxyPass = "http://127.0.0.1:${toString cfg.port}";
      };
    };

#    sops.secrets = {
#      "${service}_" = {
#        owner = "${service}";
#        group = "${service}";
#      };
#    };

     # add to backups
     modules.system.backups.paths = lib.mkIf cfg.backup [ cfg.data_dir ];
  };
}