HomeAssistant UI Theme changer

action: frontend.set_theme
data_template:
  name: |
    {% if states('input_boolean.party_mode') == 'on' %}
      Google Dark Party
    {% else %}
      {% if is_state('sun.sun', 'above_horizon') and now().hour > 6 %}
        {% if (states('binary_sensor.adventi_idoszak')=='on') %}
            Google Light Xmas Theme
        {% elif is_state('sensor.season', 'spring') %}
          Google Light Spring Theme
        {% elif is_state('sensor.season', 'winter') %}
            Google Light Winter Theme
        {% elif is_state('sensor.season', 'summer') %}
          Google Light Summer Theme
        {% else %}
          Google Light Autumn Theme
        {% endif %}
      {% else %}
        {% if (states('binary_sensor.adventi_idoszak')=='on') %}
          Google Dark Xmas Theme
        {% elif is_state('sensor.season', 'spring') %}
          Google Dark Spring Theme
        {% elif is_state('sensor.season', 'winter') %}
          Google Dark Winter Theme
        {% elif is_state('sensor.season', 'summer') %}
          Google Dark Summer Theme
        {% else %}
          Google Dark Autumn Theme
        {% endif %}
      {% endif %}
    {% endif %}