from django.test import TestCase
from django.contrib.auth import get_user_model
from datetime import datetime, date, timedelta

from .models import *
from uncloud_service.models import GenericServiceProduct


class ProductTestCase(TestCase):
    """
    Test products and products <-> order interaction
    """

    def setUp(self):
        self.user = get_user_model().objects.create(
            username='random_user',
            email='jane.random@domain.tld')

        ba = BillingAddress.objects.create(
            owner=self.user,
            organization = 'Test org',
            street="unknown",
            city="unknown",
            postal_code="somewhere else",
            active=True)

    def test_create_one_time_product(self):
        """
        One time payment products cannot be updated - can they?
        """

        p = SampleOneTimeProduct.objects.create(owner=self.user)

        self.assertEqual(p.one_time_price, 5)
        self.assertEqual(p.recurring_price, 0)


    def test_create_order_creates_correct_order_count(self):
        """
        Ensure creating orders from product only creates 1 order
        """

        # One order
        p = SampleOneTimeProduct.objects.create(owner=self.user)
        p.create_order_at(timezone.make_aware(datetime.datetime(2020,3,3)))

        order_count = Order.objects.filter(owner=self.user).count()
        self.assertEqual(order_count, 1)

        # One more order
        p = SampleRecurringProduct.objects.create(owner=self.user)
        p.create_order_at(timezone.make_aware(datetime.datetime(2020,3,3)))

        order_count = Order.objects.filter(owner=self.user).count()
        self.assertEqual(order_count, 2)

        # Should create 2 orders
        p = SampleRecurringProductOneTimeFee.objects.create(owner=self.user)
        p.create_order_at(timezone.make_aware(datetime.datetime(2020,3,3)))

        order_count = Order.objects.filter(owner=self.user).count()
        self.assertEqual(order_count, 4)


class BillingAddressTestCase(TestCase):
    def setUp(self):
        self.user = get_user_model().objects.create(
            username='random_user',
            email='jane.random@domain.tld')


    def test_user_no_address(self):
        """
        Raise an error, when there is no address
        """

        self.assertRaises(uncloud_pay.models.BillingAddress.DoesNotExist,
                          BillingAddress.get_address_for,
                          self.user)

    def test_user_only_inactive_address(self):
        """
        Raise an error, when there is no active address
        """

        ba = BillingAddress.objects.create(
            owner=self.user,
            organization = 'Test org',
            street="unknown",
            city="unknown",
            postal_code="somewhere else",
            active=False)

        self.assertRaises(uncloud_pay.models.BillingAddress.DoesNotExist,
                          BillingAddress.get_address_for,
                          self.user)

    def test_find_active_address(self):
        """
        Find the active address
        """

        ba = BillingAddress.objects.create(
            owner=self.user,
            organization = 'Test org',
            street="unknown",
            city="unknown",
            postal_code="unknown",
            active=True)


        self.assertEqual(BillingAddress.get_address_for(self.user), ba)

    def test_find_right_address_with_multiple_addresses(self):
        """
        Find the active address only, skip inactive
        """

        ba = BillingAddress.objects.create(
            owner=self.user,
            organization = 'Test org',
            street="unknown",
            city="unknown",
            postal_code="unknown",
            active=True)

        ba2 = BillingAddress.objects.create(
            owner=self.user,
            organization = 'Test org',
            street="unknown",
            city="unknown",
            postal_code="somewhere else",
            active=False)


        self.assertEqual(BillingAddress.get_address_for(self.user), ba)

    def test_change_addresses(self):
        """
        Switch the active address
        """

        ba = BillingAddress.objects.create(
            owner=self.user,
            organization = 'Test org',
            street="unknown",
            city="unknown",
            postal_code="unknown",
            active=True)

        self.assertEqual(BillingAddress.get_address_for(self.user), ba)

        ba.active=False
        ba.save()

        ba2 = BillingAddress.objects.create(
            owner=self.user,
            organization = 'Test org',
            street="unknown",
            city="unknown",
            postal_code="somewhere else",
            active=True)

        self.assertEqual(BillingAddress.get_address_for(self.user), ba2)



class BillTestCase(TestCase):
    def setUp(self):
        self.user_without_address = get_user_model().objects.create(
            username='no_home_person',
            email='far.away@domain.tld')

        self.user = get_user_model().objects.create(
            username='jdoe',
            email='john.doe@domain.tld')

        self.recurring_user = get_user_model().objects.create(
            username='recurrent_product_user',
            email='jane.doe@domain.tld')

        self.user_addr = BillingAddress.objects.create(
            owner=self.user,
            organization = 'Test org',
            street="unknown",
            city="unknown",
            postal_code="unknown",
            active=True)

        self.recurring_user_addr = BillingAddress.objects.create(
            owner=self.recurring_user,
            organization = 'Test org',
            street="Somewhere",
            city="Else",
            postal_code="unknown",
            active=True)

        self.order_meta = {}
        self.order_meta[1] = {
            'starting_date': timezone.make_aware(datetime.datetime(2020,3,3)),
            'ending_date': timezone.make_aware(datetime.datetime(2020,4,17)),
            'price': 15,
            'description': 'One chocolate bar'
        }

        self.one_time_order = Order.objects.create(
                owner=self.user,
                starting_date=self.order_meta[1]['starting_date'],
                ending_date=self.order_meta[1]['ending_date'],
                recurring_period=RecurringPeriod.ONE_TIME,
                price=self.order_meta[1]['price'],
                description=self.order_meta[1]['description'],
                billing_address=BillingAddress.get_address_for(self.user))

        self.recurring_order = Order.objects.create(
                owner=self.recurring_user,
                starting_date=timezone.make_aware(datetime.datetime(2020,3,3)),
                recurring_period=RecurringPeriod.PER_30D,
                price=15,
                description="A pretty VM",
                billing_address=BillingAddress.get_address_for(self.recurring_user)
        )

        # used for generating multiple bills
        self.bill_dates = [
            timezone.make_aware(datetime.datetime(2020,3,31)),
            timezone.make_aware(datetime.datetime(2020,4,30)),
            timezone.make_aware(datetime.datetime(2020,5,31)),
        ]



    def test_bill_one_time_one_bill_record(self):
        """
        Ensure there is only 1 bill record per order
        """

        bill = Bill.create_next_bill_for_user_address(self.user, self.user_addr)

        self.assertEqual(self.one_time_order.billrecord_set.count(), 1)

    def test_bill_sum_onetime(self):
        """
        Check the bill sum for a single one time order
        """

        bill = Bill.create_next_bill_for_user_address(self.user, self.user_addr)
        self.assertEqual(bill.sum, self.order_meta[1]['price'])


    def test_bill_creates_record_for_recurring_order(self):
        """
        Ensure there is only 1 bill record per order
        """

        bill = Bill.create_next_bill_for_user_address(self.recurring_user,
                                                      self.recurring_user_addr)

        self.assertEqual(self.recurring_order.billrecord_set.count(), 1)
        self.assertEqual(bill.billrecord_set.count(), 1)


    def test_new_bill_after_closing(self):
        """
        After closing a bill and the user has a recurring product,
        the next bill run should create e new bill
        """

        for ending_date in self.bill_dates:
            b = Bill.create_next_bill_for_user_address(self.recurring_user, self.recurring_user_addr, ending_date)
            b.close()

        bill_count = Bill.objects.filter(owner=self.recurring_user).count()

        self.assertEqual(len(self.bill_dates), bill_count)

    def test_multi_addr_multi_bill(self):
        """
        Ensure multiple bills are created if orders exist with different billing addresses
        """

        username="lotsofplaces"
        multi_addr_user = get_user_model().objects.create(
            username=username,
            email=f"{username}@example.org")

        user_addr1 = BillingAddress.objects.create(
            owner=multi_addr_user,
            organization = 'Test org',
            street="unknown",
            city="unknown",
            postal_code="unknown",
            active=True)

        order1 = Order.objects.create(
                owner=multi_addr_user,
                starting_date=self.order_meta[1]['starting_date'],
                ending_date=self.order_meta[1]['ending_date'],
                recurring_period=RecurringPeriod.ONE_TIME,
                price=self.order_meta[1]['price'],
                description=self.order_meta[1]['description'],
                billing_address=BillingAddress.get_address_for(self.user))

        # Make this address inactive
        user_addr1.active = False
        user_addr1.save()

        user_addr2 = BillingAddress.objects.create(
            owner=multi_addr_user,
            organization = 'Test2 org',
            street="unknown2",
            city="unknown2",
            postal_code="unknown2",
            active=True)

        order2 = Order.objects.create(
                owner=multi_addr_user,
                starting_date=self.order_meta[1]['starting_date'],
                ending_date=self.order_meta[1]['ending_date'],
                recurring_period=RecurringPeriod.ONE_TIME,
                price=self.order_meta[1]['price'],
                description=self.order_meta[1]['description'],
                billing_address=BillingAddress.get_address_for(self.user))


        bills = Bill.create_next_bills_for_user(multi_addr_user)

        self.assertEqual(len(bills), 2)


class ModifyProductTestCase(TestCase):
    def setUp(self):
        self.user = get_user_model().objects.create(
            username='random_user',
            email='jane.random@domain.tld')

        self.ba = BillingAddress.objects.create(
            owner=self.user,
            organization = 'Test org',
            street="unknown",
            city="unknown",
            postal_code="somewhere else",
            active=False)

    def test_user_no_address(self):
        """
        Raise an error, when there is no address
        """


        self.assertRaises(uncloud_pay.models.BillingAddress.DoesNotExist,
                          BillingAddress.get_address_for,
                          self.user)

    def test_user_only_inactive_address(self):
        """
        Raise an error, when there is no active address
        """



# class NotABillingTC(TestCase):
# #class BillingTestCase(TestCase):
#     def setUp(self):
#         self.user = get_user_model().objects.create(
#                 username='jdoe',
#                 email='john.doe@domain.tld')
#         self.billing_address = BillingAddress.objects.create(
#                 owner=self.user,
#                 street="unknown",
#                 city="unknown",
#                 postal_code="unknown")

#     def test_basic_monthly_billing(self):
#         one_time_price = 10
#         recurring_price = 20
#         description = "Test Product 1"

#         # Three months: full, full, partial.
# #        starting_date = datetime.fromisoformat('2020-03-01')
#         starting_date = datetime(2020,3,1)
#         ending_date   = datetime(2020,5,8)

#         # Create order to be billed.
#         order = Order.objects.create(
#                 owner=self.user,
#                 starting_date=starting_date,
#                 ending_date=ending_date,
#                 recurring_period=RecurringPeriod.PER_30D,
#                 recurring_price=recurring_price,
#                 one_time_price=one_time_price,
#                 description=description,
#                 billing_address=self.billing_address)

#         # Generate & check bill for first month: full recurring_price + setup.
#         first_month_bills = order.generate_initial_bill()
#         self.assertEqual(len(first_month_bills), 1)
#         self.assertEqual(first_month_bills[0].amount, one_time_price + recurring_price)

#         # Generate & check bill for second month: full recurring_price.
#         second_month_bills = Bill.generate_for(2020, 4, self.user)
#         self.assertEqual(len(second_month_bills), 1)
#         self.assertEqual(second_month_bills[0].amount, recurring_price)

#         # Generate & check bill for third and last month: partial recurring_price.
#         third_month_bills = Bill.generate_for(2020, 5, self.user)
#         self.assertEqual(len(third_month_bills), 1)
#         # 31 days in May.
#         self.assertEqual(float(third_month_bills[0].amount),
#                 round(round((7/31), AMOUNT_DECIMALS) * recurring_price, AMOUNT_DECIMALS))

#         # Check that running Bill.generate_for() twice does not create duplicates.
#         self.assertEqual(len(Bill.generate_for(2020, 3, self.user)), 0)

#     def test_basic_yearly_billing(self):
#         one_time_price = 10
#         recurring_price = 150
#         description = "Test Product 1"

#         starting_date = datetime.fromisoformat('2020-03-31T08:05:23')

#         # Create order to be billed.
#         order = Order.objects.create(
#                 owner=self.user,
#                 starting_date=starting_date,
#                 recurring_period=RecurringPeriod.PER_365D,
#                 recurring_price=recurring_price,
#                 one_time_price=one_time_price,
#                 description=description,
#                 billing_address=self.billing_address)

#         # Generate & check bill for first year: recurring_price + setup.
#         first_year_bills = order.generate_initial_bill()
#         self.assertEqual(len(first_year_bills), 1)
#         self.assertEqual(first_year_bills[0].starting_date.date(),
#                 date.fromisoformat('2020-03-31'))
#         self.assertEqual(first_year_bills[0].ending_date.date(),
#                 date.fromisoformat('2021-03-30'))
#         self.assertEqual(first_year_bills[0].amount,
#                 recurring_price + one_time_price)

#         # Generate & check bill for second year: recurring_price.
#         second_year_bills = Bill.generate_for(2021, 3, self.user)
#         self.assertEqual(len(second_year_bills), 1)
#         self.assertEqual(second_year_bills[0].starting_date.date(),
#                 date.fromisoformat('2021-03-31'))
#         self.assertEqual(second_year_bills[0].ending_date.date(),
#                 date.fromisoformat('2022-03-30'))
#         self.assertEqual(second_year_bills[0].amount, recurring_price)

#         # Check that running Bill.generate_for() twice does not create duplicates.
#         self.assertEqual(len(Bill.generate_for(2020, 3, self.user)), 0)
#         self.assertEqual(len(Bill.generate_for(2020, 4, self.user)), 0)
#         self.assertEqual(len(Bill.generate_for(2020, 2, self.user)), 0)
#         self.assertEqual(len(Bill.generate_for(2021, 3, self.user)), 0)

#     def test_basic_hourly_billing(self):
#         one_time_price = 10
#         recurring_price = 1.4
#         description = "Test Product 1"

#         starting_date = datetime.fromisoformat('2020-03-31T08:05:23')
#         ending_date   = datetime.fromisoformat('2020-04-01T11:13:32')

#         # Create order to be billed.
#         order = Order.objects.create(
#                 owner=self.user,
#                 starting_date=starting_date,
#                 ending_date=ending_date,
#                 recurring_period=RecurringPeriod.PER_HOUR,
#                 recurring_price=recurring_price,
#                 one_time_price=one_time_price,
#                 description=description,
#                 billing_address=self.billing_address)

#         # Generate & check bill for first month: recurring_price + setup.
#         first_month_bills = order.generate_initial_bill()
#         self.assertEqual(len(first_month_bills), 1)
#         self.assertEqual(float(first_month_bills[0].amount),
#                 round(16 * recurring_price, AMOUNT_DECIMALS) + one_time_price)

#         # Generate & check bill for first month: recurring_price.
#         second_month_bills = Bill.generate_for(2020, 4, self.user)
#         self.assertEqual(len(second_month_bills), 1)
#         self.assertEqual(float(second_month_bills[0].amount),
#                 round(12 * recurring_price, AMOUNT_DECIMALS))

# class ProductActivationTestCase(TestCase):
#     def setUp(self):
#         self.user = get_user_model().objects.create(
#                 username='jdoe',
#                 email='john.doe@domain.tld')

#         self.billing_address = BillingAddress.objects.create(
#                 owner=self.user,
#                 street="unknown",
#                 city="unknown",
#                 postal_code="unknown")

#     def test_product_activation(self):
#         starting_date = datetime.fromisoformat('2020-03-01')
#         one_time_price = 0
#         recurring_price = 1
#         description = "Test Product"

#         order = Order.objects.create(
#                 owner=self.user,
#                 starting_date=starting_date,
#                 recurring_period=RecurringPeriod.PER_30D,
#                 recurring_price=recurring_price,
#                 one_time_price=one_time_price,
#                 description=description,
#                 billing_address=self.billing_address)

#         product = GenericServiceProduct(
#                 custom_description=description,
#                 custom_one_time_price=one_time_price,
#                 custom_recurring_price=recurring_price,
#                 owner=self.user,
#                 order=order)
#         product.save()

#         # Validate initial state: must be awaiting payment.
#         self.assertEqual(product.status, UncloudStatus.AWAITING_PAYMENT)

#         # Pay initial bill, check that product is activated.
#         order.generate_initial_bill()
#         amount = product.order.bills[0].amount
#         payment = Payment(owner=self.user, amount=amount)
#         payment.save()
#         self.assertEqual(
#                 GenericServiceProduct.objects.get(uuid=product.uuid).status,
#                 UncloudStatus.PENDING
#                 )

# class BillingAddressTestCase(TestCase):
#     def setUp(self):
#         self.user = get_user_model().objects.create(
#                 username='jdoe',
#                 email='john.doe@domain.tld')

#         self.billing_address_01 = BillingAddress.objects.create(
#                 owner=self.user,
#                 street="unknown1",
#                 city="unknown1",
#                 postal_code="unknown1",
#                 country="CH")

#         self.billing_address_02 = BillingAddress.objects.create(
#                 owner=self.user,
#                 street="unknown2",
#                 city="unknown2",
#                 postal_code="unknown2",
#                 country="CH")

#     def test_billing_with_single_address(self):
#         # Create new orders somewhere in the past so that we do not encounter
#         # auto-created initial bills.
#         starting_date = datetime.fromisoformat('2020-03-01')

#         order_01 = Order.objects.create(
#                 owner=self.user,
#                 starting_date=starting_date,
#                 recurring_period=RecurringPeriod.PER_30D,
#                 billing_address=self.billing_address_01)
#         order_02 = Order.objects.create(
#                 owner=self.user,
#                 starting_date=starting_date,
#                 recurring_period=RecurringPeriod.PER_30D,
#                 billing_address=self.billing_address_01)

#         # We need a single bill since we work with a single address.
#         bills = Bill.generate_for(2020, 4, self.user)
#         self.assertEqual(len(bills), 1)

#     def test_billing_with_multiple_addresses(self):
#         # Create new orders somewhere in the past so that we do not encounter
#         # auto-created initial bills.
#         starting_date = datetime.fromisoformat('2020-03-01')

#         order_01 = Order.objects.create(
#                 owner=self.user,
#                 starting_date=starting_date,
#                 recurring_period=RecurringPeriod.PER_30D,
#                 billing_address=self.billing_address_01)
#         order_02 = Order.objects.create(
#                 owner=self.user,
#                 starting_date=starting_date,
#                 recurring_period=RecurringPeriod.PER_30D,
#                 billing_address=self.billing_address_02)

#         # We need different bills since we work with different addresses.
#         bills = Bill.generate_for(2020, 4, self.user)
#         self.assertEqual(len(bills), 2)