# -*- coding: utf-8 -*-
#
# ITerativ GmbH
# http://www.iterativ.ch/
#
# Copyright (c) 2020 ITerativ GmbH. All rights reserved.
#
# Created on 30.01.20
# @author: chrigu <christian.cueni@iterativ.ch>
from django.conf import settings

from core.hep_client import HepClient, HepClientException
from core.models import AdminData
from registration.models import License
from users.models import User, UserRole, Role, SchoolClass


EMAIL_NOT_VERIFIED = 'email_not_verified'
UNKNOWN_ERROR = 'unknown_error'
NO_VALID_LICENSE = 'no_valid_license'


def handle_user_and_verify_products(user_data):

    hep_client = HepClient()

    try:
        user = User.objects.get(hep_id=user_data['id'])
    except User.DoesNotExist:
        user = User.objects.create_user_from_hep(user_data)

    # todo check if email has changed, any impact on our system?

    try:
        if not hep_client.is_email_verified(user_data):
            return user, EMAIL_NOT_VERIFIED
    except HepClientException:
        return user, UNKNOWN_ERROR

    try:
        license = License.objects.get(licensee=user)
        # Todo how handle invalid license? Cron Job? How to select correct license? Save all licenses? History?
    except License.DoesNotExist:
        license, error_msg = check_and_create_licenses(hep_client, user)

        if error_msg:
            return user, error_msg

        create_role_for_user(user, license.for_role.key)

    if not license.is_valid():
        return user, NO_VALID_LICENSE

    return user, None


def check_and_create_licenses(hep_client, user):
    try:
        admin_token = AdminData.objects.get_admin_token()
        product = hep_client.myskillbox_product_for_customer(admin_token, user.hep_id)
    except HepClientException:
        return None, UNKNOWN_ERROR

    if product:
        license = License.objects.create_license_for_role(user, product['activated'],
                                                          product['raw'], product['edition'])
        # todo handle no license case
    else:
        return None, NO_VALID_LICENSE

    return license, None


def create_role_for_user(user, role_key):
    UserRole.objects.create_role_for_user(user, role_key)

    if role_key == Role.objects.TEACHER_KEY:
        SchoolClass.create_default_group_for_teacher(user)