blueprint:
  name: Battery Monitor
  description: Monitors battery levels of selected entities and exposes a low battery summary
  domain: automation
  input:
    battery_sensors:
      name: Battery Sensors
      description: List of battery level sensors to monitor
      selector:
        entity:
          domain: sensor
          multiple: true
    threshold:
      name: Low Battery Threshold
      description: Battery percentage threshold to consider "low"
      default: 20
      selector:
        number:
          min: 1
          max: 100
          step: 1
          unit_of_measurement: "%"
    notify_service:
      name: Notification Service (Optional)
      description: Service to call if any battery is low (e.g., notify.mobile_app_pixel)
      default: ""
      selector:
        text:

mode: single

trigger:
  - platform: time_pattern
    minutes: "/30"  # Check every 30 minutes

variables:
  threshold: !input threshold
  battery_sensors: !input battery_sensors
  notify_service: !input notify_service

condition: []

action:
  - variables:
      low_batteries: >
        {% set low = namespace(devices=[]) %}
        {% for entity_id in battery_sensors %}
          {% set level = states(entity_id) | int(100) %}
          {% if level <= threshold %}
            {% set name = state_attr(entity_id, 'friendly_name') or entity_id %}
            {% set low.devices = low.devices + [name ~ ' (' ~ level ~ '%)'] %}
          {% endif %}
        {% endfor %}
        {{ low.devices }}

  - choose:
      - conditions: "{{ low_batteries | length > 0 }}"
        sequence:
          - service: input_text.set_value
            target:
              entity_id: input_text.devices_with_low_battery
            data:
              value: "{{ low_batteries | join(', ') }}"
          - condition: "{{ notify_service != '' }}"
          - service: "{{ notify_service }}"
            data:
              message: >
                Low battery detected: {{ low_batteries | join(', ') }}
    default:
      - service: input_text.set_value
        target:
          entity_id: input_text.devices_with_low_battery
        data:
          value: "All batteries healthy"