{ config, lib, pkgs, ... }:
with lib;
let
  cfg = config.services.room-assistant;
in
{
  options = {
    services.room-assistant = {
      enable = mkEnableOption (lib.mdDoc "room-assistant");

      name = mkOption {
        type = with types; uniq string;
        description = "
          ...
        ";
        default = "room";
      };

      mqttHost = mkOption {
        type = with types; uniq string;
        description = "
          ...
        ";
        default = "";
      };

      mqttUser = mkOption {
        type = with types; uniq string;
        description = "
          ...
        ";
        default = "espresense";
      };

      mqttPassword = mkOption {
        type = with types; uniq string;
        description = "
          ...
        ";
        default = "insecure-password";
      };
    };
  };
  config = mkIf cfg.enable {
    hardware = {
      bluetooth.enable = true;
      deviceTree.filter = "bcm2711-rpi-*.dtb";
    };

    systemd.services = {
      btattach = {
        before = [ "bluetooth.service" ];
        after = [ "dev-ttyAMA0.device" ];
        wantedBy = [ "multi-user.target" ];
        serviceConfig = {
          ExecStart = "${pkgs.bluez}/bin/btattach -B /dev/ttyAMA0 -P bcm -S 3000000";
        };
      };
    };

    virtualisation.docker.enable = true;

    environment.etc."room-assistant.yml" = {
      text = ''
        global:
          instanceName: ${cfg.name}
          integrations:
            - homeAssistant
            - bluetoothClassic
        homeAssistant:
          mqttUrl: 'mqtt://${cfg.mqttHost}'
          mqttOptions:
            username: ${cfg.mqttUser}
            password: ${cfg.mqttPassword}
        bluetoothClassic:
          addresses:
            - A8:5B:B7:98:84:F0
            - 00:24:E4:E6:FE:AD

      '';

      # The UNIX file mode bits
      mode = "0440";
    };

    systemd.services."room-assistant" = {
      description = "room-assistant";
      wantedBy = [ "multi-user.target" ];
      after = [ "docker.service" "docker.socket" ];
      requires = [ "docker.service" "docker.socket" ];
      script = ''
        exec ${pkgs.docker}/bin/docker run \
            --rm \
            --name=room-assistant \
            --network=host \
            -v /var/run/dbus:/var/run/dbus \
            -v /etc/room-assistant.yml:/room-assistant/config/local.yml \
            --cap-add=NET_ADMIN \
            mkerix/room-assistant:2.20.0
      '';
      preStop = "${pkgs.docker}/bin/docker stop room-assistant";
      reload = "${pkgs.docker}/bin/docker restart room-assistant";
      serviceConfig = {
        ExecStartPre = "-${pkgs.docker}/bin/docker rm -f room-assistant";
        ExecStopPost = "-${pkgs.docker}/bin/docker rm -f room-assistant";
        TimeoutStartSec = 0;
        TimeoutStopSec = 120;
        Restart = "always";
      };
    };
  };
}