from abc import ABCMeta
from hashlib import md5

from django.shortcuts import resolve_url
from django.test import TestCase
from django.utils import timezone
from django.utils.html import escape
from xmltodict import parse

from abonapp.models import Abon
from accounts_app.models import UserProfile
from djing import settings
from finapp.models import PayAllTimeGateway
from group_app.models import Group


def _make_sign(act: int, pay_account: str, serv_id: str, pay_id, secret: str):
    md = md5()
    s = "%d_%s_%s_%s_%s" % (act, pay_account, serv_id, pay_id, secret)
    md.update(bytes(s, 'utf-8'))
    return md.hexdigest()


class MyBaseTestCase(metaclass=ABCMeta):
    def _client_get_check_login(self, url):
        """
        Checks if url is protected from unauthorized access
        :param url:
        :return: authorized response
        """
        r = self.client.get(url)
        self.assertRedirects(r, "%s?next=%s" % (getattr(settings, 'LOGIN_URL'), url))
        self.client.force_login(self.adminuser)
        r = self.client.get(url)
        self.assertEqual(r.status_code, 200)
        return r

    def setUp(self):
        grp = Group.objects.create(title='Grp1')
        a1 = Abon.objects.create_user(
            telephone='+79781234567',
            username='abon',
            password='passw1'
        )
        a1.group = grp
        a1.save(update_fields=('group',))
        my_admin = UserProfile.objects.create_superuser('+79781234567', 'local_superuser', 'ps')
        self.adminuser = my_admin
        self.abon = a1
        self.group = grp


class AllPayTestCase(MyBaseTestCase, TestCase):
    time_format = '%d.%m.%Y %H:%M'

    def setUp(self):
        a1 = Abon.objects.create_user(
            telephone='+79785276481',
            username='pay_account1',
            password='passw1'
        )
        a1.ballance = -13.12
        a1.fio = 'Test Name'
        a1.save(update_fields=('ballance', 'fio'))
        pay_system = PayAllTimeGateway.objects.create(
            title='Test pay system',
            secret='secret',
            service_id='service_id',
            slug='pay_gw_slug'
        )
        self.pay_system = pay_system

    def user_pay_view(self):
        print('test_user_pay_view')
        current_date = timezone.now().strftime(self.time_format)
        url = resolve_url('finapp:all_time_pay', self.pay_system.slug)
        service_id = self.pay_system.service_id
        r = self.client.get(url, {
                'ACT': 1,
                'PAY_ACCOUNT': 'pay_account1',
                'SERVICE_ID': service_id,
                'PAY_ID': '840ab457-e7d1-4494-8197-9570da035170',
                'TRADE_POINT': 'term1',
                'SIGN': _make_sign(1, 'pay_account1', service_id,
                                   '840ab457-e7d1-4494-8197-9570da035170', self.pay_system.secret)
            }
        )
        r = r.content.decode('utf-8')
        o = ''.join((
            "<pay-response>",
                "<balance>-13.12</balance>",
                "<name>Test Name</name>",
                "<account>pay_account1</account>",
                "<service_id>%s</service_id>" % escape(service_id),
                "<min_amount>10.0</min_amount>",
                "<max_amount>5000</max_amount>",
                "<status_code>21</status_code>",
                "<time_stamp>%s</time_stamp>" % escape(current_date),
            "</pay-response>"
        ))
        self.assertXMLEqual(r, o)

    def user_pay_pay(self):
        print('test_user_pay_pay')
        current_date = timezone.now().strftime(self.time_format)
        url = resolve_url('finapp:all_time_pay', self.pay_system.slug)
        service_id = self.pay_system.service_id
        r = self.client.get(url, {
            'ACT': 4,
            'PAY_ACCOUNT': 'pay_account1',
            'PAY_AMOUNT': 18.21,
            'RECEIPT_NUM': 2126235,
            'SERVICE_ID': service_id,
            'PAY_ID': '840ab457-e7d1-4494-8197-9570da035170',
            'TRADE_POINT': 'term1',
            'SIGN': _make_sign(4, 'pay_account1', service_id,
                               '840ab457-e7d1-4494-8197-9570da035170', self.pay_system.secret)
        })
        r = r.content.decode('utf-8')
        xml = ''.join((
            "<pay-response>",
                "<pay_id>840ab457-e7d1-4494-8197-9570da035170</pay_id>",
                "<service_id>%s</service_id>" % escape(service_id),
                "<amount>18.21</amount>",
                "<status_code>22</status_code>",
                "<time_stamp>%s</time_stamp>" % escape(current_date),
            "</pay-response>"
        ))
        self.test_pay_time = current_date
        self.assertXMLEqual(r, xml)

    def user_pay_check(self):
        print('test_user_pay_check')
        current_date = timezone.now().strftime(self.time_format)
        url = resolve_url('finapp:all_time_pay', self.pay_system.slug)
        service_id = self.pay_system.service_id
        r = self.client.get(url,
            {
                'ACT': 7,
                'SERVICE_ID': service_id,
                'PAY_ID': '840ab457-e7d1-4494-8197-9570da035170',
                'SIGN': _make_sign(7, '', service_id,
                                   '840ab457-e7d1-4494-8197-9570da035170', self.pay_system.secret)
            }
        )
        r = r.content.decode('utf-8')
        xml = ''.join((
            "<pay-response>",
                "<status_code>11</status_code>",
                "<time_stamp>%s</time_stamp>" % escape(current_date),
                "<transaction>",
                    "<pay_id>840ab457-e7d1-4494-8197-9570da035170</pay_id>",
                    "<service_id>%s</service_id>" % escape(service_id),
                    "<amount>18.21</amount>",
                    "<status>111</status>",
                    "<time_stamp>%s</time_stamp>" % escape(self.test_pay_time),
                "</transaction>"
            "</pay-response>"
        ))
        self.assertXMLEqual(r, xml)

    def check_ballance(self):
        print('check_ballance')
        url = resolve_url('finapp:all_time_pay', self.pay_system.slug)
        service_id = self.pay_system.service_id
        r = self.client.get(url,
            {
                'ACT': 1,
                'PAY_ACCOUNT': 'pay_account1',
                'SERVICE_ID': service_id,
                'PAY_ID': '840ab457-e7d1-4494-8197-9570da035170',
                'TRADE_POINT': 'term1',
                'SIGN': _make_sign(1, 'pay_account1', service_id,
                                   '840ab457-e7d1-4494-8197-9570da035170', self.pay_system.secret)
            }
        )
        r = r.content.decode('utf-8')
        r = parse(r)
        bl = float(r['pay-response']['balance'])
        self.assertEqual(bl, 5.09)

    def test_client_does_not_exist(self):
        print('test_client_does_not_exist')
        current_date = timezone.now().strftime(self.time_format)
        url = resolve_url('finapp:all_time_pay', self.pay_system.slug)
        service_id = self.pay_system.service_id
        r = self.client.get(url, {
            'ACT': 1,
            'PAY_ACCOUNT': 'not_existing_acc',
            'SERVICE_ID': service_id,
            'PAY_ID': '840ab457-e7d1-4494-8197-9570da035170',
            'TRADE_POINT': 'term1',
            'SIGN': _make_sign(1, 'not_existing_acc', service_id,
                               '840ab457-e7d1-4494-8197-9570da035170', self.pay_system.secret)
        })
        r = r.content.decode('utf-8')
        self.assertXMLEqual(r, ''.join((
            "<pay-response>",
                "<status_code>-40</status_code>",
                "<time_stamp>%s</time_stamp>" % escape(current_date),
                "<description>Account does not exist</description>",
            "</pay-response>"
        )))

    def try_pay_double(self):
        print('try_pay_double')
        url = resolve_url('finapp:all_time_pay', self.pay_system.slug)
        service_id = self.pay_system.service_id
        r = self.client.get(url, {
            'ACT': 4,
            'PAY_ACCOUNT': 'pay_account1',
            'SERVICE_ID': service_id,
            'PAY_ID': '840ab457-e7d1-4494-8197-9570da035170',
            'TRADE_POINT': 'term1',
            'SIGN': _make_sign(4, 'pay_account1', service_id,
                               '840ab457-e7d1-4494-8197-9570da035170', self.pay_system.secret)
        })
        r = r.content.decode('utf-8')
        r = parse(r)
        status_code = int(r['pay-response']['status_code'])
        self.assertEqual(status_code, -100)

    def non_existing_pay(self):
        print('non_existing_pay')
        current_date = timezone.now().strftime(self.time_format)
        uuid = '9f154e93-d800-419a-92f7-da33529138be'
        url = resolve_url('finapp:all_time_pay', self.pay_system.slug)
        service_id = self.pay_system.service_id
        r = self.client.get(url, {
            'ACT': 7,
            'SERVICE_ID': service_id,
            'PAY_ID': uuid,
            'SIGN': _make_sign(7, '', service_id, uuid, self.pay_system.secret)
        })
        r = r.content.decode('utf-8')
        xml = ''.join((
            "<pay-response>",
                "<status_code>-10</status_code>",
                "<time_stamp>%s</time_stamp>" % escape(current_date),
            "</pay-response>"
        ))
        self.assertXMLEqual(r, xml)

    def test_pays(self):
        self.user_pay_view()
        self.user_pay_pay()
        self.user_pay_check()
        self.check_ballance()
        self.try_pay_double()
        self.non_existing_pay()