Calender UI to create new entries with automatisation

Hi Community,

Do you have some ideas to configure an UI for adding events in my Google Calender, where I need a few custom fields to select an automatisation for this event?

As Examle:

  1. At first I go to Home Assistant on calender.
  2. Create a new event, where I can select my Date/Start/End, give it a name, and here I need a dropdown field, where I can switch my Automatisation, which will start before the event is starting, and an automatisation, which will start, before the event is ending. The time properties are done in the automatisation templates.
  3. Nice to have: Some other text-fields (eg. Name of guests…) but this is not so important.
  4. Summary of configuration will be displayed in notes field in this event:

Example:

Title: Garden Party
Date: 29.01.2023
Start: 12:00
End: 23:00
Notes:
Automatisation before Start: Garden Party Start
Automatisation before End: Garden Party End
Guest 1: Max Mustermann
Guest 2: Erika Musterfrau
Guest 3: xxxx
Guest 4: xxxx
Guest 5: xxxx
Guest 6: xxxx

Maybe somebody has an idea?