
from __future__ import print_function
import httplib2
import os

from apiclient import discovery
from apiclient.http import MediaFileUpload
from oauth2client import client
from oauth2client import tools
from oauth2client.file import Storage

try:
    import argparse
    flags = argparse.ArgumentParser(parents=[tools.argparser]).parse_args()
except ImportError:
    flags = None

# If modifying these scopes, delete your previously saved credentials
# at ~/.credentials/drive-python-quickstart.json
SCOPES = 'https://www.googleapis.com/auth/drive.file'
CLIENT_SECRET_FILE = 'client_secret.json'
APPLICATION_NAME = 'Freezer Monitor'


def get_credentials():
    """Gets valid user credentials from storage.

    If nothing has been stored, or if the stored credentials are invalid,
    the OAuth2 flow is completed to obtain the new credentials.

    Returns:
        Credentials, the obtained credential.
    """
    home_dir = os.path.expanduser('~')
    credential_dir = os.path.join(home_dir, '.credentials')
    if not os.path.exists(credential_dir):
        os.makedirs(credential_dir)
    credential_path = os.path.join(credential_dir,
                                   'freezer-monitor.json')

    store = Storage(credential_path)
    credentials = store.get()
    if not credentials or credentials.invalid:
        flow = client.flow_from_clientsecrets(CLIENT_SECRET_FILE, SCOPES)
        flow.user_agent = APPLICATION_NAME
        if flags:
            credentials = tools.run_flow(flow, store, flags)
        else: # Needed only for compatibility with Python 2.6
            credentials = tools.run(flow, store)
        print('Storing credentials to ' + credential_path)
    return credentials

def get_folder():
    # Hard-coded ID for Freezer folder
    # Replace with current ID, or logic to search for and return it.
   return '0B59ahj8bFIkCT1VlNXBLSmtab2c' 

def main():
    credentials = get_credentials()
    http = credentials.authorize(httplib2.Http())
    service = discovery.build('drive', 'v3', http=http)

    file_id = '0B59ahj8bFIkCZUFzZlRqUndYb2M'

    media = MediaFileUpload('/home/pi/Freezer/freezer_temps.db')
    file = service.files().update(fileId = file_id,
                                  media_body = media,
                                  fields = 'id').execute()
    print("File ID: ", file.get('id'))

if __name__ == '__main__':
    main()
