Write an Event Update Program in Google Calendar

I need a programmer. You need to implement a program that generates and updates events with alerts (periods to take from the settings) in the Google calendar.
Opportunities:
- stores the following settings:
- credentials for authorization in the api google calendar
Calendar address where events are added/updated
- the period of advance e-mail notification in hours
The path to the data file (csv in the file system or drive.google). Example of a file:
Subject, Design, Start Date, Start Time, End Date, End Time
Antalya -> Samara, Flight No ZF-6392 (B-757-200 No VQBKB), 25.09.17,17:25.25.09.17,21:05
1.5 calendar data update period in hours
1.6 (*1) e-mail addresses for alerting you of a change in events
2 periodically connects to the Google calendar at the address specified in the settings via api:
2.1 reads the list of events from the file, compares each of them with the existing events in the calendar:
2.1.1 If no event is present, it creates an event with the parameters specified in the file.
2.1.2. if an event already exists, update the event:
a reads from the file system (or drive.google) a file with data in csv ()
b selects an existing event in the calendar by identifier, compares the time values with the value from the file; if the time has changed, then creates a message to the addresses from the settings. The alternative is to create an alert in the calendar, counting it so that it comes immediately after it is updated. In this case, the setting (*1) for alerts is not necessary to store.