###  This code came from the google sample code ###
### No value added here other than turning on caching. ###


import httplib2
import os
import sys

from googleapiclient.discovery import build
from googleapiclient.errors import HttpError
from oauth2client.client import flow_from_clientsecrets
from oauth2client.file import Storage
from oauth2client.tools import argparser, run_flow

# The CLIENT_SECRETS_FILE variable specifies the name of a file that contains
# the OAuth 2.0 information for this application, including its client_id and
# client_secret. You can acquire an OAuth 2.0 client ID and client secret from
# the {{ Google Cloud Console }} at
# {{ https://cloud.google.com/console }}.
# Please ensure that you have enabled the YouTube Data API for your project.
# For more information about using OAuth2 to access the YouTube Data API, see:
#   https://developers.google.com/youtube/v3/guides/authentication
# For more information about the client_secrets.json file format, see:
#   https://developers.google.com/api-client-library/python/guide/aaa_client_secrets
CLIENT_SECRETS_FILE = "client_secrets.json"

# This variable defines a message to display if the CLIENT_SECRETS_FILE is
# missing.
MISSING_CLIENT_SECRETS_MESSAGE = """
WARNING: Please configure OAuth 2.0

To make this sample run you will need to populate the client_secrets.json file
found at:

   %s

with information from the {{ Cloud Console }}
{{ https://cloud.google.com/console }}

For more information about the client_secrets.json file format, please visit:
https://developers.google.com/api-client-library/python/guide/aaa_client_secrets
""" % os.path.abspath(os.path.join(os.path.dirname(__file__),
                                   CLIENT_SECRETS_FILE))

# This OAuth 2.0 access scope allows for full read/write access to the
# authenticated user's account.
YOUTUBE_READ_WRITE_SCOPE = "https://www.googleapis.com/auth/youtube"
YOUTUBE_API_SERVICE_NAME = "youtube"
YOUTUBE_API_VERSION = "v3"

def get_youtube_connection(args):
    flow = flow_from_clientsecrets(CLIENT_SECRETS_FILE,
        message=MISSING_CLIENT_SECRETS_MESSAGE,
        scope=YOUTUBE_READ_WRITE_SCOPE)
    
    storage = Storage("%s-oauth2.json" % sys.argv[0])
    credentials = storage.get()
    
    if credentials is None or credentials.invalid:
        credentials = run_flow(flow, storage, args)
        
    youtube = build(YOUTUBE_API_SERVICE_NAME, YOUTUBE_API_VERSION,
    #http=credentials.authorize(httplib2.Http()))
    http=credentials.authorize(httplib2.Http(cache=".playlister-cache"))) # turning on caching
    return youtube
