Web Automation — 3

I need an application that automate a reservation process.
The process includes some steps in different web pages which main steps are as follow:
– logging using username and password
– select different situations (based on end user inputs ) and submit them in some pages
– as a main step, finding a free day in calendar by searching in different specified month (defined by end user) and selecting a free time of it. This step is a loop step until the application find a appropriate time.
– after finding a free time, the application must inform end user using an alarm and notification.
Features and constraints of application:
I need to run this app on different OS – Windows, Android, and iOS – as a result I need three different front-end application with same user interface.
Front-end user interface is a simple interface with three text box, two radio buttons, and a combo box which fill dynamically by fetching data from SVC file in app initialization phase and also a submit button.
the application have to log any exceptions and error that may be occured.
The application must be program in a way that can be reused in future for same process on differnt web sites with minimum change (layering architecture).
Use of python for programming backend of application and kivymd as windows front-end.
One of the main constraints is that the web site only is available locally and you have to connect to my lap top using remote desktop so that you can view web pages and find element attributes in online mode, becaus I think they are javascript based and you can not save and read them later in offline.
The application backend should be run on local or cloud server.