import os
import json
import httplib2
import flask
from oauth2client import client
from apiclient.discovery import build

http_auth = None
view_id = '00000000' # Add view id here

app = flask.Flask(__name__)

@app.route('/oauth2callback')
def oauth2callback():
  client_secrets = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'client_secrets.json')
  flow = client.flow_from_clientsecrets(
      client_secrets,
      scope='https://www.googleapis.com/auth/analytics.readonly',
      redirect_uri=flask.url_for('oauth2callback', _external=True))
  if 'code' not in flask.request.args:
    auth_uri = flow.step1_get_authorize_url()
    return flask.redirect(auth_uri)
  else:
    auth_code = flask.request.args.get('code')
    credentials = flow.step2_exchange(auth_code)
    flask.session['credentials'] = credentials.to_json() #credentials.authorize(httplib2.Http())
    return flask.redirect(flask.url_for('index'))

@app.route('/')
def index():
  if 'credentials' not in flask.session:
    return flask.redirect(flask.url_for('oauth2callback'))
  credentials = client.OAuth2Credentials.from_json(flask.session['credentials'])
  if credentials.access_token_expired:
    return flask.redirect(flask.url_for('oauth2callback'))
  else:
    http_auth = credentials.authorize(httplib2.Http(disable_ssl_certificate_validation=True))
    analytics_service = build('analytics', 'v4', http_auth)
    reports = analytics_service.reports()
    response = reports.batchGet(body={
      "reportRequests":[
      {
        "viewId": view_id,
        "dateRanges":[
          {
            "startDate":"30daysAgo",
            "endDate":"today"
          }],
        "metrics":[
          {
            "expression":"ga:pageviews"
          }],
        "dimensions": [{"name": "ga:date"}],
        "dimensionFilterClauses": [{
          "filters": [{
              "dimensionName": "ga:pagePath",
              "expressions": [
                "/create-account"
              ]
          }]
        }]
      }]
    }).execute()
    import pdb; pdb.set_trace()


if __name__ == '__main__':
  import uuid
  app.secret_key = str(uuid.uuid4())
  app.run(debug=True, host='0.0.0.0', port=8000)