{ pkgs, lib, ... }:
let

  # https://www.zigbee2mqtt.io/devices/SPZB0001.html
  allDevices = {
    "office_heater_1" = { id = "0x00158d00032f5ee4"; }; # office
    "office_heater_2" = { id = "0x00158d00032f5f9f"; }; # office (kitchen)
    "bedroom_heater_1" = { id = "0x00158d00032f6d1e"; }; # bed room
    "storage_heater_1" = { id = "0x00158d00032f604d"; }; # abstell raum
  };

  # -t "zigbee2mqtt/heater3/set"   -m '{"system_mode":"auto","current_heating_setpoint":23}'
  # -t "zigbee2mqtt/heater3/set"   -m '{"system_mode":"off"}'

in
{

  services.zigbee2mqttConfiguration = lib.mapAttrs'
    (name:
      { id, ... }: {
        name = id;
        value = {
          legacy = false;
          retain = false;
          friendly_name = name;
          transition = 1;
          debounce = 0.5;
          filtered_attributes = [
            "battery_low"
            "eurotronic_host_flags"
            "eurotronic_system_mode"
            #"occupied_heating_setpoint"
            #"pi_heating_demand"
            #"unoccupied_heating_setpoint"
          ];
        };
      })
    allDevices;

  services.homeAssistantConfig = {

    sensor = lib.flatten (lib.mapAttrsToList
      (name:
        { ... }: [
          {
            name = "battery_${name}";
            platform = "mqtt";
            state_topic = "zigbee2mqtt/${name}";
            availability_topic = "zigbee2mqtt/bridge/state";
            unit_of_measurement = "%";
            icon = "mdi:battery-10";
            value_template = "{{ value_json.battery }}";
          }
          {
            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 }}";
          }
          {
            platform = "mqtt";
            name = "temperature_${name}";
            state_topic = "zigbee2mqtt/${name}";
            availability_topic = "zigbee2mqtt/bridge/state";
            unit_of_measurement = "°C";
            device_class = "temperature";
            value_template = "{{ value_json.local_temperature }}";
          }
          {
            platform = "mqtt";
            name = "pi_heating_demand_${name}";
            state_topic = "zigbee2mqtt/${name}";
            availability_topic = "zigbee2mqtt/bridge/state";
            unit_of_measurement = "%";
            value_template = "{{ value_json.pi_heating_demand }}";
          }
        ])
      allDevices);

  };

}