blueprint:
  name: "Sync Remote Temperature to TRVZB"
  author: Sonoff
  description: >
    Synchronizes an external temperature reading with a SONOFF TRVZB
    thermostatic radiator valve connected through ZHA or Zigbee2MQTT. The
    reading is applied whenever the valve's external temperature mode is
    enabled, immediately and on each source update. Temperature values in
    Celsius, Fahrenheit, or Kelvin are automatically converted to Celsius.
  domain: automation
  input:
    target_device:
      name: TRVZB device
      description: Select the ZHA or Zigbee2MQTT radiator valve that should receive the temperature.
      selector:
        device:
          filter:
            - integration: zha
              manufacturer: SONOFF
              model: TRVZB
            - integration: mqtt
              manufacturer: SONOFF
              model: Zigbee thermostatic radiator valve
              model_id: TRVZB
    source_entity:
      name: External temperature sensor
      description: Select a temperature sensor from another device. The target TRVZB's own temperature is not a valid source.
      selector:
        entity:
          filter:
            domain: sensor
            device_class: temperature

variables:
  target_device: !input target_device
  source_entity: !input source_entity
  target_integration: >
    {% set ns = namespace(value='') %}
    {% for identifier in (device_attr(target_device, 'identifiers') or []) %}
      {% if identifier[0] == 'zha' %}
        {% set ns.value = 'zha' %}
      {% elif identifier[0] == 'mqtt' %}
        {% set ns.value = 'mqtt' %}
      {% endif %}
    {% endfor %}
    {{ ns.value }}
  zha_external_temperature_sensor_switch: >
    {{ (device_entities(target_device) or [])
       | select('match', '^switch\\..*_external_temperature_sensor$')
       | list
       | first
       | default('', true) }}
  zha_external_temperature_sensor_value: >
    {{ (device_entities(target_device) or [])
       | select('match', '^number\\..*_external_temperature_sensor_value$')
       | list
       | first
       | default('', true) }}
  mqtt_temperature_sensor_select: >
    {{ (device_entities(target_device) or [])
       | select('match', '^select\\..*_temperature_sensor_select$')
       | list
       | first
       | default('', true) }}
  mqtt_external_temperature_input: >
    {{ (device_entities(target_device) or [])
       | select('match', '^number\\..*_external_temperature_input$')
       | list
       | first
       | default('', true) }}

triggers:
  - trigger: state
    entity_id: !input source_entity
    id: source_temperature
    not_to:
      - "unknown"
      - "unavailable"
  - trigger: event
    event_type: state_changed
    id: external_temperature_sensor_enabled

conditions:
  - condition: template
    value_template: >
      {{ is_number(states(source_entity))
         and state_attr(source_entity, 'unit_of_measurement') in ['°C', '°F', 'K']
         and source_entity not in (device_entities(target_device) or [])
         and device_attr(target_device, 'manufacturer') == 'SONOFF'
         and ((target_integration | trim == 'zha'
               and device_attr(target_device, 'model') == 'TRVZB'
               and zha_external_temperature_sensor_switch | trim != ''
               and zha_external_temperature_sensor_value | trim != ''
               and is_state(zha_external_temperature_sensor_switch, 'on')
               and (trigger.id == 'source_temperature'
                    or (trigger.event.data.entity_id == zha_external_temperature_sensor_switch
                        and trigger.event.data.new_state is not none
                        and trigger.event.data.new_state.state == 'on')))
              or (target_integration | trim == 'mqtt'
                  and device_attr(target_device, 'model') == 'Zigbee thermostatic radiator valve'
                  and mqtt_external_temperature_input | trim != ''
                  and mqtt_temperature_sensor_select | trim != ''
                  and trigger.id == 'source_temperature')) }}

actions:
  - variables:
      external_temperature: >
        {% set temperature = states(source_entity) | float %}
        {% set unit = state_attr(source_entity, 'unit_of_measurement') %}
        {{ ((temperature - 32) * 5 / 9 if unit == '°F'
             else temperature - 273.15 if unit == 'K'
             else temperature) | round(1) }}
  - choose:
      - conditions:
          - condition: template
            value_template: "{{ target_integration | trim == 'zha' }}"
        sequence:
          - action: number.set_value
            target:
              entity_id: "{{ zha_external_temperature_sensor_value | trim }}"
            data:
              value: "{{ external_temperature }}"
      - conditions:
          - condition: template
            value_template: >
              {{ target_integration | trim == 'mqtt'
                 and mqtt_external_temperature_input | trim != ''
                 and mqtt_temperature_sensor_select | trim != ''
                 and trigger.id == 'source_temperature' }}
        sequence:
          - action: number.set_value
            target:
              entity_id: "{{ mqtt_external_temperature_input | trim }}"
            data:
              value: "{{ external_temperature }}"

mode: restart