import datetime
import pickle
import os.path
from googleapiclient.discovery import build
from google_auth_oauthlib.flow import InstalledAppFlow
from google.auth.transport.requests import Request

# If modifying these scopes, delete the file token.pickle.
SCOPES = ['https://www.googleapis.com/auth/calendar']


def base():
    creds = None
    # The file token.pickle stores the user's access and refresh tokens, and is
    # created automatically when the authorization flow completes for the first
    # time.
    if os.path.exists('token.pickle'):
        with open('token.pickle', 'rb') as token:
            creds = pickle.load(token)
    # If there are no (valid) credentials 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('client_secret_1061473190594-fkm2feaplgmcfk2ppl4pfmtbk58npgri.apps.googleusercontent.com.json', SCOPES)
            creds = flow.run_console()
        # Save the credentials for the next run
        with open('token.pickle', 'wb') as token:
            pickle.dump(creds, token)

    service = build('calendar', 'v3', credentials=creds)
    timeMin = datetime.datetime.utcnow() - datetime.timedelta(hours=24 * 7)
    timeMin = timeMin.isoformat() + 'Z'

    events_result = service.events().list(calendarId='primary', timeMin=timeMin, maxResults=30, singleEvents=True, orderBy='startTime').execute()
    events = events_result.get('items', [])

    if not events:
        print('No upcoming events found.')
        return None
    return events


if __name__ == '__main__':
    events = base()
    for event in events:
        print(event)