{ pkgs, lib, ... }:
let

  # https://www.zigbee2mqtt.io/devices/E1757.html
  allDevices = {
    "fyrtur1" = { id = "0x680ae2fffe64fa40"; }; # office
    "fyrtur2" = { id = "0x680ae2fffe6e9f41"; }; # sleeping room
  };

  # -t "zigbee2mqtt/fyrtur1/set"   -m '{"position":100}'
  # -t "zigbee2mqtt/fyrtur1/set"   -m '{"position":15}'
in {

  services.zigbee2mqtt.devices = lib.mapAttrs' (name:
    { id, ... }: {
      name = id;
      value = {
        retain = false;
        friendly_name = name;
        transition = 1;
      };
    }) allDevices;

  services.homeAssistantConfig = {

    #light = lib.flatten (lib.mapAttrsToList (name:
    #  { ... }: [
    #    {
    #      name = "rgb_${name}";
    #      platform = "mqtt";
    #      state_topic = "zigbee2mqtt/${name}";
    #      availability_topic = "zigbee2mqtt/bridge/state";
    #      brightness = true;
    #      color_temp = true;
    #      xy = true;
    #      schema = "json";
    #      command_topic = "zigbee2mqtt/${name}/rgb/set";
    #      brightness_scale = 254;
    #      state_topic_postfix = "rgb";
    #    }
    #    {
    #      name = "white_${name}";
    #      platform = "mqtt";
    #      state_topic = "zigbee2mqtt/${name}";
    #      availability_topic = "zigbee2mqtt/bridge/state";
    #      brightness = true;
    #      schema = "json";
    #      command_topic = "zigbee2mqtt/${name}/white/set";
    #      brightness_scale = 254;
    #      state_topic_postfix = "white";
    #    }
    #  ]) allDevices);

    #sensor = with lib;
    #  mapAttrsToList (name:
    #    { ... }: {
    #      name = "link_${name}";
    #      platform = "mqtt";
    #      state_topic = "zigbee2mqtt/${name}";
    #      availability_topic = "zigbee2mqtt/bridge/state";
    #      icon = "mdi:signal";
    #      unit_of_measurement = "lqi";
    #      value_template = "{{ value_json.linkquality}}";
    #    }) allDevices;

    #  binary_sensor = lib.mapAttrsToList (name:
    #    { ... }: {
    #      name = "update_${name}";
    #      platform = "mqtt";
    #      state_topic = "zigbee2mqtt/${name}";
    #      availability_topic = "zigbee2mqtt/bridge/state";
    #      payload_on = true;
    #      payload_off = false;
    #      value_template = "{{ value_json.update_available }}";
    #    }) allDevices;

    #  # create groups
    #  # -------------
    #  group = let

    #    # to have nice panels for every device
    #    lightGroups = lib.mapAttrs (name:
    #      { ... }: {
    #        entities = [
    #          "light.${name}"
    #          "sensor.link_${name}"
    #          "binary_sensor.update_${name}"
    #        ];
    #      }) allDevices;

    #    # sort lights into given groups.
    #    sortedInGroups = let
    #      groupEntries = lib.zipAttrs (lib.flatten (lib.mapAttrsToList (name:
    #        { groups ? [ ], ... }:
    #        map (groupName: { "${groupName}" = "light.${name}"; }) groups)
    #        allDevices));
    #    in lib.mapAttrs (name: entities: { inherit entities; }) groupEntries;

    #  in sortedInGroups // lightGroups // {
    #    all_lights.entities =
    #      lib.mapAttrsToList (name: { ... }: "light.${name}") allDevices;
    #  };

  };

}