duty cycle heater automation

blueprint:
  name: Duty-Cycle Thermostat (Max-Off Protection)
  description: >
    Thermostat logic with duty cycling when temperature is above threshold:
    - If temp >= threshold → switch OFF (start duty cycle)
    - If temp < threshold → switch ON immediately
    - When above threshold, heating is OFF for X hours, then ON for Y hours,
      repeating until temperature drops.

  domain: automation
  input:
    temperature_sensor:
      name: Temperature Sensor
      selector:
        entity:
          domain: sensor
    heating_switch:
      name: Heating Switch
      selector:
        entity:
          domain: switch
    threshold:
      name: Temperature Threshold (°C)
      default: 23
      selector:
        number:
          min: 5
          max: 35
          step: 0.1
          unit_of_measurement: °C
    off_duration:
      name: Max OFF duration (hours)
      description: Heating will never stay OFF longer than this while above threshold.
      default: 2
      selector:
        number:
          min: 0.1
          max: 12
          step: 0.1
          unit_of_measurement: hours
    on_duration:
      name: ON duration (hours) during duty cycle
      default: 2
      selector:
        number:
          min: 0.1
          max: 12
          step: 0.1
          unit_of_measurement: hours

mode: restart

trigger:
  - platform: state
    entity_id: !input heating_switch
    to: "off"
    for:
      hours: !input off_duration

  - platform: numeric_state
    entity_id: !input temperature_sensor
    below: !input threshold

  - platform: numeric_state
    entity_id: !input temperature_sensor
    above: !input threshold

condition: []

action:
  - choose:

      # -----------------------------
      # 1) Temperature BELOW threshold
      # -----------------------------
      - conditions:
          - condition: numeric_state
            entity_id: !input temperature_sensor
            below: !input threshold
        sequence:
          - service: switch.turn_on
            target:
              entity_id: !input heating_switch

      # -----------------------------
      # 2) Temperature ABOVE threshold AND switch is ON → turn OFF
      # -----------------------------
      - conditions:
          - condition: numeric_state
            entity_id: !input temperature_sensor
            above: !input threshold
          - condition: state
            entity_id: !input heating_switch
            state: "on"
        sequence:
          - service: switch.turn_off
            target:
              entity_id: !input heating_switch

      # -----------------------------
      # 3) Duty Cycle: OFF for X hours → still hot → ON for Y hours → maybe OFF again
      # -----------------------------
      - conditions:
          - condition: numeric_state
            entity_id: !input temperature_sensor
            above: !input threshold
          - condition: state
            entity_id: !input heating_switch
            state: "off"
        sequence:
          # Turn ON for ON-duration
          - service: switch.turn_on
            target:
              entity_id: !input heating_switch

          - delay:
              hours: !input on_duration

          # If still hot → turn OFF again (cycle restarts)
          - condition: numeric_state
            entity_id: !input temperature_sensor
            above: !input threshold

          - service: switch.turn_off
            target:
              entity_id: !input heating_switch