"""
Context.

Contexts are per request and it contains important data such as the current
user informations.
"""
from flask import abort
from flask import g
from flask import request
from owsrequest import flask_request
from werkzeug import exceptions

from analytics.logic import user


def get_current_user():
    """Get the current user object.

    Returns:
        User: the current user.

    """
    if hasattr(g, 'current_user'):
        return g.current_user

    account_type, account_id = flask_request.get_grass_headers(request)
    if not all((account_type, account_id, str(account_id).isdigit())):
        abort(exceptions.Forbidden.code)

    new_user = user.create(id=account_id, type=account_type).message

    if not new_user:
        abort(exceptions.Forbidden.code)

    g.current_user = new_user
    return g.current_user