# =============================================================================
# MQTT Knob Media Controller Blueprint
# =============================================================================
# Controls a media player using an MQTT-connected rotary encoder/knob.
# Supports customizable action IDs to work with various MQTT devices.
#
# Author: Alexei Dolgolyov (dolgolyov.alexei@gmail.com)
# =============================================================================

blueprint:
  name: "MQTT Knob Media Controller"
  description: >
    Control a media player using a rotary knob/encoder via MQTT.

    **Supported actions:**
    - Play/Pause toggle (button press)
    - Volume up/down (rotation)
    - Mute toggle (optional)
    - Next/Previous track (optional)

    **Volume step behavior:**
    - If your device sends `action_step_size` in the MQTT payload, it will be used
    - Otherwise, the configured default step size is applied

    **Note:** Action IDs can be customized to match your specific MQTT device.
  domain: automation

  input:
    # -------------------------------------------------------------------------
    # Required: Core Settings
    # -------------------------------------------------------------------------
    mqtt_topic:
      name: MQTT Topic
      description: >
        The MQTT topic your knob publishes to.
        Example: `zigbee2mqtt/living_room_knob/action`
      selector:
        text:

    media_player:
      name: Media Player
      description: The media player entity to control.
      selector:
        entity:
          domain: media_player

    # -------------------------------------------------------------------------
    # Volume Settings
    # -------------------------------------------------------------------------
    default_volume_step:
      name: Default Volume Step
      description: >
        Volume change per step (0.01 = 1%, 0.05 = 5%).
        Used when the device doesn't provide step size in the payload.
      default: 0.05
      selector:
        number:
          min: 0.01
          max: 0.25
          step: 0.01
          mode: slider

    step_size_divisor:
      name: Step Size Divisor
      description: >
        Divisor applied to `action_step_size` from device payload.
        Higher value = smaller volume changes. Default 500 works well for most Zigbee knobs.
      default: 500
      selector:
        number:
          min: 100
          max: 1000
          step: 50
          mode: slider

    # -------------------------------------------------------------------------
    # Action IDs - Customize to match your MQTT device
    # -------------------------------------------------------------------------
    action_play_pause:
      name: Play/Pause Action ID
      description: Action ID sent when pressing the knob button.
      default: "toggle"
      selector:
        text:

    action_volume_down:
      name: Volume Down Action ID
      description: Action ID sent when rotating the knob counter-clockwise.
      default: "brightness_step_down"
      selector:
        text:

    action_volume_up:
      name: Volume Up Action ID
      description: Action ID sent when rotating the knob clockwise.
      default: "brightness_step_up"
      selector:
        text:

    action_mute:
      name: Mute Action ID (Optional)
      description: >
        Action ID for mute toggle. Leave empty to disable.
        Some devices send this on double-press or long-press.
      default: ""
      selector:
        text:

    action_next_track:
      name: Next Track Action ID (Optional)
      description: Action ID for skipping to next track. Leave empty to disable.
      default: ""
      selector:
        text:

    action_prev_track:
      name: Previous Track Action ID (Optional)
      description: Action ID for going to previous track. Leave empty to disable.
      default: ""
      selector:
        text:

# =============================================================================
# Trigger: Listen for MQTT messages on configured topic
# =============================================================================
trigger:
  - platform: mqtt
    topic: !input mqtt_topic

# =============================================================================
# Variables: Extract and process MQTT payload data
# =============================================================================
variables:
  # Input references
  media: !input media_player
  default_step: !input default_volume_step
  divisor: !input step_size_divisor

  # Action ID mappings
  act_play_pause: !input action_play_pause
  act_volume_down: !input action_volume_down
  act_volume_up: !input action_volume_up
  act_mute: !input action_mute
  act_next: !input action_next_track
  act_prev: !input action_prev_track

  # Extract action from MQTT payload
  action: "{{ trigger.payload_json.action }}"

  # Calculate volume step: use device-provided value or fall back to default
  step: >-
    {% if 'action_step_size' in trigger.payload_json %}
      {{ (trigger.payload_json.action_step_size | float(0)) / divisor }}
    {% else %}
      {{ default_step }}
    {% endif %}

# =============================================================================
# Actions: Handle each action type
# =============================================================================
action:
  - choose:
      # ----- Play/Pause Toggle -----
      - conditions:
          - condition: template
            value_template: "{{ action == act_play_pause }}"
        sequence:
          - service: media_player.media_play_pause
            target:
              entity_id: "{{ media }}"

      # ----- Volume Down -----
      - conditions:
          - condition: template
            value_template: "{{ action == act_volume_down }}"
        sequence:
          - service: media_player.volume_set
            target:
              entity_id: "{{ media }}"
            data:
              volume_level: >-
                {{ [0, (state_attr(media, 'volume_level') | float(0)) - step] | max }}

      # ----- Volume Up -----
      - conditions:
          - condition: template
            value_template: "{{ action == act_volume_up }}"
        sequence:
          - service: media_player.volume_set
            target:
              entity_id: "{{ media }}"
            data:
              volume_level: >-
                {{ [1, (state_attr(media, 'volume_level') | float(0)) + step] | min }}

      # ----- Mute Toggle (Optional) -----
      - conditions:
          - condition: template
            value_template: "{{ act_mute != '' and action == act_mute }}"
        sequence:
          - service: media_player.volume_mute
            target:
              entity_id: "{{ media }}"
            data:
              is_volume_muted: "{{ not state_attr(media, 'is_volume_muted') }}"

      # ----- Next Track (Optional) -----
      - conditions:
          - condition: template
            value_template: "{{ act_next != '' and action == act_next }}"
        sequence:
          - service: media_player.media_next_track
            target:
              entity_id: "{{ media }}"

      # ----- Previous Track (Optional) -----
      - conditions:
          - condition: template
            value_template: "{{ act_prev != '' and action == act_prev }}"
        sequence:
          - service: media_player.media_previous_track
            target:
              entity_id: "{{ media }}"