`history_stats` doesn't allow `state_class` for statistics tracking

Reopening #66995 (by @rct). I don’t understand what is the sense of locking issue comments.

Still valid for 2022.11.3.

The problem

The history_stats integration doesn’t allow state_class to be defined. This prevents history_stats sensors from being used as statistics.

Tested against 2022.2.9, error from check configuration:

Invalid config for [sensor.history_stats]: [state_class] is an invalid option for [sensor.history_stats]. Check: sensor.history_stats->state_class. (See ?, line ?). 

What version of Home Assistant Core has the issue?

core-2022.2.9

What was the last working version of Home Assistant Core?

No response

What type of installation are you running?

Home Assistant Supervised

Integration causing the issue

history_stats

Link to integration documentation on our website

https://www.home-assistant.io/integrations/history_stats/

Diagnostics information

No response

Example YAML snippet

sensor:
  platform: history_stats
  name: lyrichk_runtime
  entity_id: binary_sensor.lyrichk_running
  state: 'on'
  type: time
  start: '{{ now().replace(hour=0, minute=0, second=0) }}'
  end: '{{ now() }}'
  # as of 2022.2.9 - this isn't (yet) valid for history_stats
  state_class: measurement

Anything in the logs that might be useful for us?

No response

Additional information

No response

[chatziko]

history_stats sensors automatically set state_class = measurement, so statistics are available.

However, state_class cannot be changed to something else in the config. It would be useful to be able to change it. For instance a sensor tracking how much time a thermostat was on today would make sense to have state_class = total_increasing.

[krystof-k]

Sorry, I wasn’t completely clear. The issue was different. I needed to use it within the statistic card (not graph) and use the stat_type: change, which works only for state_class: total and the history_stats uses just measurement. So I had to bypass it by creating a second template sensor with state_class: total.

E.g.:

sensor:
  - platform: history_stats
    name: Kotel 1 doba hoření celková statistika
    type: time
    entity_id: sensor.kotel_1
    state: Hoří
    start: "{{ 0 }}"
    end: "{{ now() }}"
template:
  - sensor:
      - name: Kotel 1 doba hoření celková
        state: "{{ states('sensor.kotel_1_doba_horeni_celkova_statistika') }}"
        state_class: total
        device_class: duration
        unit_of_measurement: h