"""
Author: Michel Peltriaux
Organization: Struktur- und Genehmigungsdirektion Nord, Rhineland-Palatinate, Germany
Contact: michel.peltriaux@sgdnord.rlp.de
Created on: 10.11.21

"""
import datetime

from django.contrib.auth.models import Group
from django.core.exceptions import ObjectDoesNotExist
from django.urls import reverse

from compensation.models import Payment
from intervention.models import Intervention
from konova.settings import DEFAULT_GROUP
from konova.tests.test_views import BaseWorkflowTestCase


class InterventionWorkflowTestCase(BaseWorkflowTestCase):
    """ This test case adds workflow tests

    """

    @classmethod
    def setUpTestData(cls):
        super().setUpTestData()
        cls.new_url = reverse("intervention:new", args=())

        # Add user to the default group -> give default permissions
        default_group = Group.objects.get(name=DEFAULT_GROUP)
        cls.superuser.groups.set([default_group])

    def test_new_normal_case(self):
        """
        Checks a 'normal' case of creating a new intervention.
            We expect the user to be redirected as expected right away to the detail page of the new intervention.
            We expect the user to be directly added to the shared user of the intervention
            We expect that a minimum of data (identifier, title, (empty) geometry) can be used to create an intervention

        Returns:

        """
        # Define the intervention identifier for easier handling on the next lines
        test_id = "Test_IDENTIFIER"

        # Expect the new intervention does not exist yet
        obj_exists = Intervention.objects.filter(
            identifier=test_id
        ).exists()
        self.assertFalse(obj_exists)

        # User creates a new intervention with bare minimum content, using the proper url and post data
        post_data = {
            "identifier": test_id,
            "title": "Test_TITLE",
            "geometry": "",
        }
        response = self.client_user.post(
            self.new_url,
            post_data
        )

        # Now expect the new intervention to exist in the db
        try:
            obj = Intervention.objects.get(
                identifier=test_id
            )
            self.assertEqual(obj.identifier, test_id)
        except ObjectDoesNotExist:
            # Fail if there is no such object
            self.fail()

        expected_redirect = reverse("intervention:detail", args=(obj.id,))
        # Expect redirect to the detail view of the new intervention
        self.assertRedirects(response, expected_redirect)

        # Expect user to be first and only user with shared access
        self.assertIn(self.superuser, obj.users.all())
        self.assertEqual(1, obj.users.count())

    def subtest_add_payment(self):
        """ Subroutine for 'normal' payment tests

        Checks a 'normal' case of adding a payment.
            We expect a new payment to be addable to an existing intervention

        Returns:

        """
        ## Attention: Despite the fact, this url refers to a compensation app route, we test it here for the interventions.
        ## Reason: A payment is some kind of compensation for an intervention. Therefore it lives inside the compensation app.
        ## BUT: Payments are added on the intervention detail page. Therefore it's part of a regular intervention workflow.
        new_payment_url = reverse("compensation:pay-new", args=(self.intervention.id,))

        # Create default detail page of intervention
        detail_url = reverse("intervention:detail", args=(self.intervention.id,))

        # Make sure there are no payments on the intervention, yet
        self.assertEqual(0, self.intervention.payments.count())

        # Create form data to be sent to the url
        test_amount = 10.00
        test_due = "2021-01-01"
        test_comment = "test_comment"
        post_data = {
            "amount": test_amount,
            "due": test_due,
            "comment": test_comment
        }
        self.client_user.post(
            new_payment_url,
            post_data,
        )
        # We do not test for any redirects in here, since the new payment url is realized using a modal, which does not
        # perform any direct redirects but instead reloads the page after finisihing.

        # Make sure there is a new payment on the intervention now
        self.assertEqual(1, self.intervention.payments.count())

        # Make sure the payment contains our data
        payment = self.intervention.payments.all()[0]
        self.assertEqual(payment.amount, test_amount)
        self.assertEqual(payment.due_on, datetime.date.fromisoformat(test_due))
        self.assertEqual(payment.comment, test_comment)
        return payment

    def subtest_delete_payment(self, payment: Payment):
        """ Subroutine for 'normal' payment tests

        Checks a 'normal' case of adding a payment.
            We expect a payment to be deletable to an existing intervention

        Returns:

        """
        # Create removing url for the payment
        remove_url = reverse("compensation:pay-remove", args=(payment.id,))
        post_data = {
            "confirm": True,
        }
        self.client_user.post(
            remove_url,
            post_data
        )

        # Expect the payment to be gone from the db and therefore from the intervention as well
        try:
            payment.refresh_from_db()
            # Well, we should not reach this next line of code, since the payment should be gone, therefore not
            # refreshable -> fail!
            self.fail()
        except ObjectDoesNotExist:
            # If we get in here, the test was fine
            pass
        # Now make sure the intervention has no payments anymore
        self.assertEqual(0, self.intervention.payments.count())

    def test_changing_payment_test_case(self):
        """
        Checks a 'normal' case of adding a payment.
            We expect a new payment to be addable to an existing intervention
            We expect a payment to be deletable to an existing intervention

        Returns:

        """
        # Create new payment for the default intervention
        payment = self.subtest_add_payment()

        # Now remove the payment again
        self.subtest_delete_payment(payment)