import datetime
import os

from google.oauth2.credentials import Credentials
from google_auth_oauthlib.flow import InstalledAppFlow
from google.auth.transport.requests import Request
from googleapiclient.discovery import build


# Scopes required to access and manipulate calendar events
SCOPES = ['https://www.googleapis.com/auth/calendar']

def get_calendar_service():
    creds = None
    # Load existing credentials
    if os.path.exists('token.json'):
        creds = Credentials.from_authorized_user_file('token.json', SCOPES)
    # If no valid credentials are available, let the user log in.
    if not creds or not creds.valid:
        if creds and creds.expired and creds.refresh_token:
            creds.refresh(Request())
        else:
            flow = InstalledAppFlow.from_client_secrets_file(
                'credentials.json', SCOPES)
            creds = flow.run_local_server(port=0)
        # Save the credentials for the next run
        with open('token.json', 'w') as token:
            token.write(creds.to_json())

    service = build('calendar', 'v3', credentials=creds)
    return service

def create_event(start_time_str, end_time_str, summary, description, location):
    service = get_calendar_service()
    start_time = datetime.datetime.fromisoformat(start_time_str)
    end_time = datetime.datetime.fromisoformat(end_time_str)
    event = {
      'summary': summary,
      'location': location,
      'description': description,
      'start': {
        'dateTime': start_time.strftime("%Y-%m-%dT%H:%M:%S"),
        'timeZone': 'Europe/Paris',
      },
      'end': {
        'dateTime': end_time.strftime("%Y-%m-%dT%H:%M:%S"),
        'timeZone': 'Europe/Paris',
      },
    }

    event = service.events().insert(calendarId='primary', body=event).execute()
    print('Event created: %s' % (event.get('htmlLink')))

# Example of adding an event
create_event('2024-05-15T09:00:00', '2024-05-15T13:00:00', 'Meeting with Bob', 'Discuss project', 'Cafe Paris')