blueprint:
  name: "Custom: MQTT Knob Media Controller (Dynamic Step)"
  description: >
    Control a media player using a knob switch via MQTT.
    - `toggle` pauses/unpauses
    - `rotate_left` decreases volume
    - `rotate_right` increases volume
    - Volume step is taken from `action_step` in the MQTT payload
  domain: automation
  input:
    mqtt_topic:
      name: MQTT Topic
      description: The topic your knob publishes to (e.g., zigbee2mqtt/knob1/action)
      selector:
        text:
    media_player:
      name: Media Player
      selector:
        entity:
          domain: media_player

trigger:
  - platform: mqtt
    topic: !input mqtt_topic

variables:
  media: !input media_player
  action: "{{ trigger.payload_json.action }}"
  step: >-
      {% set key = 'action_step_size' %}
      {% if key in trigger.payload_json %}
        {{ (trigger.payload_json[key] | float(0)) / 500 }}
      {% else %}
        0
      {% endif %}

action:
  - choose:
      - conditions:
          - condition: template
            value_template: "{{ action == 'toggle' }}"
        sequence:
          - service: media_player.media_play_pause
            target:
              entity_id: "{{ media }}"
      - conditions:
          - condition: template
            value_template: "{{ action == 'brightness_step_down' }}"
        sequence:
          - variables:
              current: "{{ state_attr(media, 'volume_level') | float(0) }}"
              new: "{{ [0, current - step] | max }}"
          - service: media_player.volume_set
            target:
              entity_id: "{{ media }}"
            data:
              volume_level: "{{ new }}"
      - conditions:
          - condition: template
            value_template: "{{ action == 'brightness_step_up' }}"
        sequence:
          - variables:
              current: "{{ state_attr(media, 'volume_level') | float(0) }}"
              new: "{{ [current + step, 1] | min }}"
          - service: media_player.volume_set
            target:
              entity_id: "{{ media }}"
            data:
              volume_level: "{{ new }}"