"""
GET /api/payment/invoices — «پرداخت‌ها و فاکتورها»ی پروفایل (۲۰۲۶-۱۰-۰۱).

راه‌های شکستن که این‌جا امتحان می‌شوند: دیدنِ فاکتورِ دیگری، عوض شدنِ فاکتورِ قدیمی
با عوض شدنِ قیمتِ پلن، و نشان دادنِ refِ ساختگیِ کدِ ۱۰۰٪ به‌جای کدِ پیگیریِ بانکی.
"""
from django.core.cache import cache
from django.test import TestCase
from rest_framework.test import APIClient

from accounts.authentication import issue_access_token
from accounts.models import User
from discount.models import DiscountCode
from payment.models import Order
from payment.services import apply_order_payment_result
from subscription.models import Plan


def _client(user):
    client = APIClient()
    client.credentials(HTTP_AUTHORIZATION=f'Bearer {issue_access_token(user.id)}')
    return client


class InvoiceTests(TestCase):
    def setUp(self):
        cache.clear()
        self.user = User.objects.create(phone='09120007001')
        self.client = _client(self.user)
        self.plan = Plan.objects.create(title='سالانه', price=299000, duration_days=365)

    def tearDown(self):
        cache.clear()

    def buy(self):
        response = self.client.post('/api/subscription/purchase', {'planId': str(self.plan.id)}, format='json')
        self.assertEqual(response.status_code, 200, response.content)
        return Order.objects.get(pk=response.json()['orderId'])

    def invoices(self, client=None):
        response = (client or self.client).get('/api/payment/invoices')
        self.assertEqual(response.status_code, 200, response.content)
        return response.json()['invoices']

    def test_paid_order_with_discount_reads_like_an_invoice(self):
        order = self.buy()
        DiscountCode.objects.create(code='MEHR20', type='percent', value=20, max_uses=5)
        redeem = self.client.post('/api/discount/redeem', {'code': 'MEHR20', 'orderId': str(order.id)}, format='json')
        self.assertEqual(redeem.status_code, 200, redeem.content)
        apply_order_payment_result(order=order, gateway='zarinpal', gateway_ref_id='A00000123456',
                                   new_status='paid', event='test')

        [invoice] = self.invoices()
        self.assertEqual(invoice['invoiceNumber'], f'TD-{order.id:06d}')
        self.assertEqual(invoice['status'], 'paid')
        self.assertEqual(invoice['planTitle'], 'سالانه')
        self.assertEqual((invoice['listPrice'], invoice['discountAmount'], invoice['amount']),
                         (299000, 59800, 239200))
        self.assertEqual(invoice['discountCode'], 'MEHR20')
        self.assertEqual(invoice['refId'], 'A00000123456')
        self.assertIsNotNone(invoice['paidAt'])

    def test_changing_the_plan_later_does_not_rewrite_an_old_invoice(self):
        self.buy()
        Plan.objects.filter(pk=self.plan.pk).update(title='سالانه‌ی ویژه', price=399000)
        [invoice] = self.invoices()
        self.assertEqual((invoice['planTitle'], invoice['listPrice']), ('سالانه', 299000))

    def test_full_discount_shows_no_fake_bank_reference(self):
        order = self.buy()
        DiscountCode.objects.create(code='FREE100', type='percent', value=100, max_uses=5)
        self.client.post('/api/discount/redeem', {'code': 'FREE100', 'orderId': str(order.id)}, format='json')
        [invoice] = self.invoices()
        self.assertEqual((invoice['status'], invoice['amount'], invoice['refId']), ('paid', 0, ''))

    def test_unpaid_orders_are_listed_too(self):
        self.buy()
        [invoice] = self.invoices()
        self.assertEqual((invoice['status'], invoice['paidAt'], invoice['refId']), ('pending', None, ''))

    def test_someone_else_sees_nothing(self):
        self.buy()
        stranger = User.objects.create(phone='09120007002')
        self.assertEqual(self.invoices(_client(stranger)), [])

    def test_orders_from_before_the_snapshot_have_no_list_price(self):
        Order.objects.create(user_id=self.user.id, amount=99000, idempotency_key='old-order')
        [invoice] = self.invoices()
        self.assertEqual((invoice['listPrice'], invoice['discountAmount'], invoice['planTitle']), (None, None, ''))

    def test_requires_a_token(self):
        self.assertIn(APIClient().get('/api/payment/invoices').status_code, (401, 403))