#!/usr/local/bin/python
import httplib2
import os, pdb

from apiclient import discovery
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/gmail-python-quickstart.json
SCOPES = 'https://www.googleapis.com/auth/gmail.readonly'
CLIENT_SECRET_FILE = '/Users/smittapalli/.creds/gcloud_oauth2_webapp_haus.json'
APPLICATION_NAME = 'Gmail API Python Quickstart'


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, '.creds')
  credential_path = os.path.join(credential_dir, 'gmail-python-quickstart.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 main():
  """Shows basic usage of the Gmail API.

  Creates a Gmail API service object and outputs a list of label names
  of the user's Gmail account.
  """
  credentials = get_credentials()
  http = credentials.authorize(httplib2.Http())
  service = discovery.build('gmail', 'v1', http=http)

  results = service.users().labels().list(userId='me').execute()
  labels = results.get('labels', [])

  if not labels:
    print('No labels found.')
  else:
    print('Labels:')
    for label in labels:
      print(label['name'])


if __name__ == '__main__':
  pdb.set_trace()
  #main()
