import json

from flask import Response, request
from flask_restful import Resource

from hub_api.config import Config
from hub_api.helpers.session_helper import session, refresh_session


class Meb(Resource, Config):
  def __init__(self):
    super().__init__()

  def post(self):
    """
    API call for requesting a specified list of enriched buildings
    """
    session_id = request.headers.get('session_id', None)
    token = request.headers.get('token', None)
    application_uuid = request.headers.get('application_uuid', None)
    _session = refresh_session(session_id, token, application_uuid)
    if _session is None:
      return Response(json.dumps({'error': 'unauthorized'}), status=403)
    application_id = session(session_id)['application_id']
    user_id = session(session_id)['user_id']
    token = {'token': _session['token']}
    payload = request.get_json()
    results = self.export_db_factory.results(user_id, application_id, payload)
    if results == {}:
      # no data found for the given parameters
      return Response(json.dumps({'result': 'succeed', 'results': results}), status=200, headers=token)
    # deserialize the response to return pure json
    city_name = next(iter(results))
    for building_results in results[city_name]:
      values = []
      for value in building_results['insel meb']:
        key = next(iter(value))
        values.append({key: json.loads(value[key])})
      building_results['insel meb'] = values
    return Response(json.dumps({'result': 'succeed', 'results': results}), status=200, headers=token)